Post on 15-Jan-2016
Summary of Caribbean Data Evaluation SEDAR
January, 2009
3/24/09
Todd Gedamke (SEFSC)
Terms of Reference – Data Evaluation SEDAR(paraphrased)
1) Review available data and develop recommendations regarding their accuracy and reliability. Provide complete tables.
2) Review the basis for existing stock complexes.
3) Recommend species or stock complexes for which informative SEDAR benchmark assessments may be feasible.
4) Review alternative methods for estimating mortality rates and abundance trends that might be useful for those species or stock complexes for which data are deemed sufficient.
5) Review the research and monitoring recommendations from the previous assessments in the U.S. Caribbean.
6) Provide guidance on developing ACLs given data accuracy and reliability recommendations.
Terms of Reference – Data Evaluation SEDAR 1) Review available data and develop recommendations regarding their accuracy
and reliability. Provide complete tables.
•Recreational Data
•Fishery Independent Data
•Commercial Trip tickets—Landings
•Commercial Trip Interview Program (TIP)—Length
Frequency Data
Available Data
Recreational Fisheries Data• MRFSS initiated in Puerto Rico in 2000
– In 2005: 470,00 shore mode trips; 380,000 private mode trips; <35,000 charter boat trips
– No data collected on conch, whelk, or lobster
• MRFSS is not conducted in the US Virgin Islands
• Occasional, short-term recreational surveys do occur, e.g. May-Sept. 2000 when 50,000 recreational conch fishers were estimated in Puerto Rico and the Virgin Islands
• There is no long-
term, ongoing
monitoring of
recreational fishing
in the US Caribbean
other than MRFSS
in Puerto Rico
Fishery-Independent Data
• Catalog of datasets being compiled/reviewed– documenting coverage, focus, availability of data– NMFS/NOS cataloging coral reef monitoring to improve coordination
• Most studies spatially or temporally limited– earlier studies very limited– increase in coverage ~ 2000 to present
• Diver-based studies limited to <100ft– shallow water snapper, groupers, grunts, parrotfishes – OK– no (or few) deep water snapper, big grouper, or pelagics
• Need context of study – e.g., catches from spawning aggregation, targeting depths, methods
Courtesy: Ron Hill
Fishery-Independent Data
• SEDAR’s 4, 8, and 14 did not find a useful time series to conduct assessments
• Need strong recommendations for well-funded, well-designed fishery-independent research programs
Courtesy: Ron Hill
Trip Tickets aka. Sales Records
Self reported commercial fishing dataReported Landings
Snapper/Grouper
Other Finfish
Pot fishNet fish
Hook and line fishSpear gun fish
LobsterConchWhelk
Pelagics (T/D/W)
other-1other-2other-3
Baitfish/fry
GrouperSnapper
GruntJack
SurgeonParrot
ShellfishTriggerfish
AngelfishBarracuda
GoatfishMackerel
Porgy
Shellfish
1974 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008
{other-1 =(conch, whelk, octopus, squid, clams, oysters); other-2 = (does not include conch, whelk); other-3 = "other"}
Quantity of gear and fishing time No effort data (# of pots recorded in shaded years/groups)
Available years of landings data and species groups that were used on the St. Thomas/St. John trip tickets.
Puerto Rico Sales Records
• Available Computerized Since 1983
• Identifies species specific landings on each sales record
• For early/most years not a unique 1:1 relation between sales records and trips (multiple trips on one ticket)
• Trends in Total Catch Landed affected by reporting rates
• Review- reporting rates of fisher sales records vary by year, area, gear
Trip Tickets aka. Sales Records
Self reported commercial fishing dataReported Landings
Expansion Factors
St. Croix
0
200,000
400,000
600,000
800,000
1,000,000
1,200,000
1,400,000
1972 1974 1976 1978 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008
Year
Lan
din
gs
(Po
un
ds)
$0
$1,000,000
$2,000,000
$3,000,000
$4,000,000
$5,000,000
$6,000,000
$7,000,000
Val
ue
(Do
llar
s)
LandingsValue
Reported Landings Only (Not expanded)
Puerto Rico Commercial Fishery Reporting Rates
• USVI1. Lower expansion factors2. No species specific records3. Some effort data exists 4. TIP data can’t be used to estimate species
composition
• Puerto Rico1. Higher expansion factors2. Species specific records3. Questionable effort data hampers CPUE
calculations
Pros/Cons of Trip Ticket Data
Use of Trip Ticket/Landings data to generate indices of abundance
(CPUE)
Data filteringSignificant reduction in sample sizes
• Trips reporting multiple gears or regions fished were excluded
• Hours fished must be reported
• Gear fished must be reported
• Only single trip reports used
Conclusions regarding CPUE Indices
• With careful evaluation of raw data (primarily effort measure) reasonable CPUE indices may be possible but they have limited utility because:
-Short time series limited contrast-Started well after initiation of fishery
• Potential to use CPUE in conjunction with mean length methodology
• Obvious trends could be used in ‘informed judgement’ approach
Trip Interview Program (TIP)
Trip Interview Program (TIP)
• Data collected by port samplers
• Provides length frequency of sampled catch
• In terms of characterizing catch (e.g. species composition, landings verification, or CPUE) there are two issues:
1) Very small fraction of the total landings are sampled. On the order of 1-2% in the
USVI and 3-5% for PR.
2) Questions as to whether samples were complete catch samples (i.e. 100% of catch sampled for length).
Grouper Unit 4
SPECIES_NAME TOTAL # PUERTO RICO ST. CROIX ST. THOMAS/ST. JOHN TIGER GROUPER 3320 3238 30 52 YELLOWFIN GROUPER 990 283 272 429 MISTY GROUPER 212 82 79 51 RED GROUPER 159 44 1 113 YELLOWEDGE GROUPER 0 0 0 0
Total Number of Measured fish in TIP Database
Priority FMP Units
PUERTO RICO-GROUPER UNIT 4 GEAR_DESCRIPTION GEARCODE _FREQ_ GEAR_CLASS1 % of Total LINES HAND, OTHER 610 2701 HOOK AND LINE 74.06% DIVING OUTFITS, OTHER 943 672 DIVING BY HAND OR SPEARFISHING 18.43% POTS AND TRAPS, FISH 345 212 TRAPS 5.81% GILL NETS, OTHER 425 23 GILL NETS 0.63% BUOY GEAR, VERTICAL 614 6 HOOK AND LINE 0.16% POTS AND TRAPS, CMB 300 5 TRAP NETS 0.14% POTS AND TRAPS, SPINY LOBSTER 355 5 TRAPS 0.14% BY HAND, OTHER 955 5 DIVING BY HAND OR SPEARFISHING 0.14% TROLL & HAND LINES CMB 600 4 HOOK AND LINE 0.11% LINES LONG, REEF FISH 676 4 LONG LINE 0.11% LINES TROLL, OTHER 660 3 HOOK AND LINE 0.08% ROD AND REEL 611 2 HOOK AND LINE 0.05% LINES LONG SET WITH HOOKS 675 2 LONG LINE 0.05% SPEARS 760 2 DIVING BY HAND OR SPEARFISHING 0.05% TRAMMEL NETS 530 1 TRAMMEL NETS 0.03%
Number of Measured Fish – Puerto Rico – All Grouper Unit 4
Snapper Unit 1
SPECIES_NAME TOTAL # ST. CROIX PUERTO RICO ST. THOMAS/ST. JOHN SILK SNAPPER 25703 2820 22501 344
VERMILION SNAPPER 12664 418 11943 303
BLACKFIN SNAPPER 7419 3730 2828 861
BLACK SNAPPER 404 331 71 2
Number of Measured Fish – Puerto Rico – All Snapper Unit 1
SNAPPER UNIT 1-PUERTO RICO
Gear_DescriptionGEARCOD
E _FREQ_ GEAR_CLASS1 %TOTAL
LINES HAND, OTHER 610 23402 HOOK AND LINE 62.67%
POTS AND TRAPS, FISH 345 10996 TRAPS 29.45%
TROLL & HAND LINES CMB 600 1089 HOOK AND LINE 2.92%
LINES TROLL, OTHER 660 339 HOOK AND LINE 0.91%
LINES LONG, REEF FISH 676 333 LONG LINE 0.89%
POTS AND TRAPS, SPINY LOBSTER 355 305 TRAPS 0.82%
ROD AND REEL 611 234 HOOK AND LINE 0.63%
POTS AND TRAPS, CMB 300 219 TRAP NETS 0.59%
GILL NETS, OTHER 425 142 GILL NETS 0.38%
REEL, MANUAL 612 91 HOOK AND LINE 0.24%
HAUL SEINES, LONG 30 85 SEINE NETS 0.23%
LINES LONG SET WITH HOOKS 675 31 LONG LINE 0.08%
TRAMMEL NETS 530 25 TRAMMEL NETS 0.07%
LINES TROLL, MACKEREL 665 19 HOOK AND LINE 0.05%
DIVING OUTFITS, OTHER 943 13 DIVING BY HAND OR SPEARFISHING 0.03%
BUOY GEAR, VERTICAL 614 10 HOOK AND LINE 0.03%
8 TRAP NETS 0.02%
POTS AND TRAPS, PERWKLE OR CKL 365 2 TRAPS 0.01%
295153196
1095565
9591368
914428285
752823135288285
1220
621505438169
6362198313
610-LINES HAND, OTHER
345-POTS AND TRAPS, FISH
1980 1985 1990 1995 2000 2005 2010
Number of Measured Fish – St. Croix – All Snapper Unit 1
SNAPPER UNIT 1-ST. CROIX
Gear_Description GEARCODE _FREQ_ GEAR_CLASS1 %TOTAL
LINES HAND, OTHER 610 3709 HOOK AND LINE 50.82%
BUOY GEAR, VERTICAL 614 1593 HOOK AND LINE 21.82%
REEL, ELECTRIC OR HYDRAULIC * 613 1070 HOOK AND LINE 14.66%
ROD AND REEL 611 328 HOOK AND LINE 4.49%
POTS AND TRAPS, FISH 345 253 TRAPS 3.47%
LINES LONG, REEF FISH 676 127 LONG LINE 1.74%
POTS AND TRAPS, CMB 300 124 TRAP NETS 1.70% TROLL & HAND LINES CMB 600 71 HOOK AND LINE 0.97%
FYKE AND HOOP NETS, FISH 310 19 TRAP NETS 0.26%
LINES TROLL, OTHER 660 5 HOOK AND LINE 0.07%
Number of Measured Fish – St. Thomas/St. John – All Snapper Unit 1
SNAPPER UNIT 1-ST. THOMAS/ST. JOHN
Gear_Description GEARCODESP _FREQ_ GEAR_CLASS1 %TOTAL
POTS AND TRAPS, FISH 345 1022 TRAPS 67.68% POTS AND TRAPS, CMB 300 221 TRAP NETS 14.64%
TROLL & HAND LINES CMB 600 115 HOOK AND LINE 7.62%
LINES HAND, OTHER 610 56 HOOK AND LINE 3.71%
POTS AND TRAPS, SPINY LOBSTER 355 29 TRAPS 1.92%
LINES LONG, REEF FISH 676 28 LONG LINE 1.85%
ENCIRCLINLING NETS (PURSE) 100 17 SEINE NETS 1.13%
PUSH NET 725 12 OTHER NETS 0.79%
LINES LONG SET WITH HOOKS 675 5 LONG LINE 0.33%
HOOKS, SPONGE 925 3 OTHER GEAR 0.20%
LINES TROLL, OTHER 660 2 HOOK AND LINE 0.13%
Parrotfish – All Species
SPECIES_NAME TOTAL # ST. CROIX PUERTO RICO ST. THOMAS/ST. JOHN
REDTAIL PARROTFISH 49989 36078 12613 1229
STOPLIGHT PARROTFISH 41406 25431 15047 911
REDBAND PARROTFISH 8976 7897 850 229
PRINCESS PARROTFISH 4868 3478 1296 91 REDFIN PARROTFISH 2797 2536 174 87
QUEEN PARROTFISH 1924 837 1075 10
BLUE PARROTFISH 81 0 63 18
RAINBOW PARROTFISH 81 1 68 12
STRIPED PARROTFISH 22 19 0 3
MIDNIGHT PARROTFISH 20 1 13 6
PARROTFISHES, SCARIDAE 2812 1819 928 65
PARROTFISH-PUERTO RICO
Gear_DescriptionGEARCOD
E _FREQ_ GEAR_CLASS1 %TOTAL
TRAMMEL NETS 530 18715 TRAMMEL NETS 58.63%
POTS AND TRAPS, FISH 345 8080 TRAPS 25.31%
GILL NETS, OTHER 425 2544 GILL NETS 7.97%
DIVING OUTFITS, OTHER 943 891 DIVING BY HAND OR SPEARFISHING 2.79%
POTS AND TRAPS, CMB 300 639 TRAP NETS 2.00%
LINES HAND, OTHER 610 510 HOOK AND LINE 1.60%
HAUL SEINES, LONG 30 338 SEINE NETS 1.06%
BY HAND, OTHER 955 102 DIVING BY HAND OR SPEARFISHING 0.32%
POTS AND TRAPS, SPINY LOBSTER 355 99 TRAPS 0.31%
TROLL & HAND LINES CMB 600 43 HOOK AND LINE 0.13%
POTS AND TRAPS, CRAB, BLUE 330 37 TRAPS 0.12%
POTS AND TRAPS, LOBSTER INSHOR 350 28 TRAPS 0.09%
ROD AND REEL 611 28 HOOK AND LINE 0.09%
HAUL SEINES, BEACH 20 18 SEINE NETS 0.06%
15 TRAP NETS 0.05%
ENTANGLING NETS (GILL) UNSPC 400 12 GILL NETS 0.04%
LINES TROLL, OTHER 660 10 HOOK AND LINE 0.03%
POTS AND TRAPS, EEL 340 9 TRAPS 0.03%
GILL NETS, DRIFT LARGE PELAGIC 520 5 GILL NETS 0.02%
SPEARS 760 3 DIVING BY HAND OR SPEARFISHING 0.01%
LINES TROLL, TUNA 655 1 HOOK AND LINE 0.00%
Number of Measured Fish – Puerto Rico – Parrotfish
Number of measured fishPuerto Rico-All Parrotfish Species
392961215
1098
1321
126722781662
1801836
331399143259514
522
967
736279234329
176
2013
610-LINES HAND, OTHER
425-GILL NETS, OTHER
530-TRAMMEL NETS
943-DIVING OUTFITS, OTHER
345-POTS AND TRAPS, FISH
353018893084115120547635302317121673268
1980 1985 1990 1995 2000 2005 2010
Number of Measured Fish – St. Croix – Parrotfish
PARROTFISH-ST.CROIX Gear_Description GEARCODESP _FREQ_ GEAR_CLASS1 %TOTAL
POTS AND TRAPS, FISH 345 55195 TRAPS 70.76%
GILL NETS, GL 2 - 4 INCH 505 8086 GILL NETS 10.37%
POTS AND TRAPS, CMB 300 7239 TRAP NETS 9.28%
TRAMMEL NETS 530 2774 TRAMMEL NETS 3.56%
DIVING OUTFITS, OTHER 943 1732 DIVING BY HAND OR SPEARFISHING 2.22%
GILL NETS, GL 1 - 2 INCH 500 1446 GILL NETS 1.85%
SPEARS 760 1035 DIVING BY HAND OR SPEARFISHING 1.33%
GILL NETS, OTHER 425 257 GILL NETS 0.33%
LINES LONG, REEF FISH 676 240 LONG LINE 0.31%
LINES HAND, OTHER 610 66 HOOK AND LINE 0.08%
ROD AND REEL 611 27 HOOK AND LINE 0.03%
2163351591710734
217
244
776
592
822
350
684
1571
623
1325
3580
2595
953813801
6836
2819
613
4717
2020
345-POTS AND TRAPS, FISH
505-GILL NETS, GL 2 - 4 INCH
1980 1985 1990 1995 2000 2005 2010
PARROTFISH-ST.THOMAS/ST. JOHN
Gear_Description GEARCODESP _FREQ_ GEAR_CLASS1 %TOTAL
POTS AND TRAPS, FISH 345 2276 TRAPS 85.53%
POTS AND TRAPS, CMB 300 196 TRAP NETS 7.37%
POTS AND TRAPS, SPINY LOBSTER 355 77 TRAPS 2.89%
54 TRAPS 2.03%
POTS AND TRAPS, BOX TRAP 380 49 TRAPS 1.84%
LINES HAND, OTHER 610 5 HOOK AND LINE 0.19%
HAUL SEINES, LONG 30 2 SEINE NETS 0.08%
LINES TROLL, OTHER 660 1 HOOK AND LINE 0.04%
SPEARS 760 1DIVING BY HAND OR SPEARFISHING 0.04%
Number of Measured Fish – St. Thomas/St. John – Parrotfish
8967
222
80
18
144217
284213
19
5228254458
322
7
345-POTS AND TRAPS, FISH
1980 1985 1990 1995 2000 2005 2010
Evaluation of Spatial Changes in the Fisheries
TIP DATA
# of
mea
sure
d fi
sh (
norm
aliz
ed b
y an
nual
tota
ls)
Change in proportions of regions sampled (two different periods indicated by red arrows
Puerto Rico – Hook and Line (610) -Snapper Unit 1
• Limited information available to evaluate spatial changes (USVI distance from shore variable uninformative)
• Deep water snapper fishery (WNW Puerto Rico) needs to be evaluated separately
Highlighted the need to collect better spatial and depth
information
Terms of Reference – Data Evaluation SEDAR(paraphrased)
1) Review available data and develop recommendations regarding their accuracy and reliability. Provide complete tables.
2) Review the basis for existing stock complexes.
3) Recommend species or stock complexes for which informative SEDAR benchmark assessments may be feasible.
4) Review alternative methods for estimating mortality rates and abundance trends that might be useful for those species or stock complexes for which data are deemed sufficient.
5) Review the research and monitoring recommendations from the previous assessments in the U.S. Caribbean.
6) Provide guidance on developing ACLs given data accuracy and reliability recommendations.
Cluster Analysis – Species CompositionAndy Strelcheck, Nick Farmer, Jason Reuter
• Analysis was relatively consistent with current FMP species groups
• Discussion group with fisherman resulted in some suggested modifications
• Joe/Jason?
BlueMidnightRainbow
Parrotfish Unit 2
PrincessQueenRedfinRedtailStoplightRedbandStriped
BlueMidnightPrincessQueenRainbowRedfinRedtailStoplightRedbandStriped
Parrotfish
YellowedgeMisty
Grouper Unit 5
YellowfinRedTigerBlack
YellowfinRedTigerYellowedgeMisty
Grouper Unit 4
Red hindConeyRock hindGraysby
Red hindConeyRock hindGraysbyCreole-fish
Grouper Unit 3
Yellowtail SnapperYellowtail SnapperSnapper Unit 4
GrayLaneMuttonDogSchoolmasterMahogany
GrayLaneMuttonDogSchoolmasterMahogany
Snapper Unit 3
Queen Cardinal (Pristopomoidesmacrophthalmus)
Queen Wenchman (Pristopomoidesaquilonaris)
Snapper Unit 2
SilkBlack BlackfinVermilion Wenchman (Pristopomoidesaquilonaris)
SilkBlack BlackfinVermilion
Snapper Unit 1
ProposedCurrentComplex
BlueMidnightRainbow
Parrotfish Unit 2
PrincessQueenRedfinRedtailStoplightRedbandStriped
BlueMidnightPrincessQueenRainbowRedfinRedtailStoplightRedbandStriped
Parrotfish
YellowedgeMisty
Grouper Unit 5
YellowfinRedTigerBlack
YellowfinRedTigerYellowedgeMisty
Grouper Unit 4
Red hindConeyRock hindGraysby
Red hindConeyRock hindGraysbyCreole-fish
Grouper Unit 3
Yellowtail SnapperYellowtail SnapperSnapper Unit 4
GrayLaneMuttonDogSchoolmasterMahogany
GrayLaneMuttonDogSchoolmasterMahogany
Snapper Unit 3
Queen Cardinal (Pristopomoidesmacrophthalmus)
Queen Wenchman (Pristopomoidesaquilonaris)
Snapper Unit 2
SilkBlack BlackfinVermilion Wenchman (Pristopomoidesaquilonaris)
SilkBlack BlackfinVermilion
Snapper Unit 1
ProposedCurrentComplex
BlueMidnightRainbow
Parrotfish Unit 2
PrincessQueenRedfinRedtailStoplightRedbandStriped
BlueMidnightPrincessQueenRainbowRedfinRedtailStoplightRedbandStriped
Parrotfish
YellowedgeMisty
Grouper Unit 5
YellowfinRedTigerBlack
YellowfinRedTigerYellowedgeMisty
Grouper Unit 4
Red hindConeyRock hindGraysby
Red hindConeyRock hindGraysbyCreole-fish
Grouper Unit 3
Yellowtail SnapperYellowtail SnapperSnapper Unit 4
GrayLaneMuttonDogSchoolmasterMahogany
GrayLaneMuttonDogSchoolmasterMahogany
Snapper Unit 3
Queen Cardinal (Pristopomoidesmacrophthalmus)
Queen Wenchman (Pristopomoidesaquilonaris)
Snapper Unit 2
SilkBlack BlackfinVermilion Wenchman (Pristopomoidesaquilonaris)
SilkBlack BlackfinVermilion
Snapper Unit 1
ProposedCurrentComplex
BlueMidnightRainbow
Parrotfish Unit 2
PrincessQueenRedfinRedtailStoplightRedbandStriped
BlueMidnightPrincessQueenRainbowRedfinRedtailStoplightRedbandStriped
Parrotfish
YellowedgeMisty
Grouper Unit 5
YellowfinRedTigerBlack
YellowfinRedTigerYellowedgeMisty
Grouper Unit 4
Red hindConeyRock hindGraysby
Red hindConeyRock hindGraysbyCreole-fish
Grouper Unit 3
Yellowtail SnapperYellowtail SnapperSnapper Unit 4
GrayLaneMuttonDogSchoolmasterMahogany
GrayLaneMuttonDogSchoolmasterMahogany
Snapper Unit 3
Queen Cardinal (Pristopomoidesmacrophthalmus)
Queen Wenchman (Pristopomoidesaquilonaris)
Snapper Unit 2
SilkBlack BlackfinVermilion Wenchman (Pristopomoidesaquilonaris)
SilkBlack BlackfinVermilion
Snapper Unit 1
ProposedCurrentComplex
BlueMidnightRainbow
Parrotfish Unit 2
PrincessQueenRedfinRedtailStoplightRedbandStriped
BlueMidnightPrincessQueenRainbowRedfinRedtailStoplightRedbandStriped
Parrotfish
YellowedgeMisty
Grouper Unit 5
YellowfinRedTigerBlack
YellowfinRedTigerYellowedgeMisty
Grouper Unit 4
Red hindConeyRock hindGraysby
Red hindConeyRock hindGraysbyCreole-fish
Grouper Unit 3
Yellowtail SnapperYellowtail SnapperSnapper Unit 4
GrayLaneMuttonDogSchoolmasterMahogany
GrayLaneMuttonDogSchoolmasterMahogany
Snapper Unit 3
Queen Cardinal (Pristopomoidesmacrophthalmus)
Queen Wenchman (Pristopomoidesaquilonaris)
Snapper Unit 2
SilkBlack BlackfinVermilion Wenchman (Pristopomoidesaquilonaris)
SilkBlack BlackfinVermilion
Snapper Unit 1
ProposedCurrentComplex
BlueMidnightRainbow
Parrotfish Unit 2
PrincessQueenRedfinRedtailStoplightRedbandStriped
BlueMidnightPrincessQueenRainbowRedfinRedtailStoplightRedbandStriped
Parrotfish
YellowedgeMisty
Grouper Unit 5
YellowfinRedTigerBlack
YellowfinRedTigerYellowedgeMisty
Grouper Unit 4
Red hindConeyRock hindGraysby
Red hindConeyRock hindGraysbyCreole-fish
Grouper Unit 3
Yellowtail SnapperYellowtail SnapperSnapper Unit 4
GrayLaneMuttonDogSchoolmasterMahogany
GrayLaneMuttonDogSchoolmasterMahogany
Snapper Unit 3
Queen Cardinal (Pristopomoidesmacrophthalmus)
Queen Wenchman (Pristopomoidesaquilonaris)
Snapper Unit 2
SilkBlack BlackfinVermilion Wenchman (Pristopomoidesaquilonaris)
SilkBlack BlackfinVermilion
Snapper Unit 1
ProposedCurrentComplex
BlueMidnightRainbow
Parrotfish Unit 2
PrincessQueenRedfinRedtailStoplightRedbandStriped
BlueMidnightPrincessQueenRainbowRedfinRedtailStoplightRedbandStriped
Parrotfish
YellowedgeMisty
Grouper Unit 5
YellowfinRedTigerBlack
YellowfinRedTigerYellowedgeMisty
Grouper Unit 4
Red hindConeyRock hindGraysby
Red hindConeyRock hindGraysbyCreole-fish
Grouper Unit 3
Yellowtail SnapperYellowtail SnapperSnapper Unit 4
GrayLaneMuttonDogSchoolmasterMahogany
GrayLaneMuttonDogSchoolmasterMahogany
Snapper Unit 3
Queen Cardinal (Pristopomoidesmacrophthalmus)
Queen Wenchman (Pristopomoidesaquilonaris)
Snapper Unit 2
SilkBlack BlackfinVermilion Wenchman (Pristopomoidesaquilonaris)
SilkBlack BlackfinVermilion
Snapper Unit 1
ProposedCurrentComplex
BlueMidnightRainbow
Parrotfish Unit 2
PrincessQueenRedfinRedtailStoplightRedbandStriped
BlueMidnightPrincessQueenRainbowRedfinRedtailStoplightRedbandStriped
Parrotfish
YellowedgeMisty
Grouper Unit 5
YellowfinRedTigerBlack
YellowfinRedTigerYellowedgeMisty
Grouper Unit 4
Red hindConeyRock hindGraysby
Red hindConeyRock hindGraysbyCreole-fish
Grouper Unit 3
Yellowtail SnapperYellowtail SnapperSnapper Unit 4
GrayLaneMuttonDogSchoolmasterMahogany
GrayLaneMuttonDogSchoolmasterMahogany
Snapper Unit 3
Queen Cardinal (Pristopomoidesmacrophthalmus)
Queen Wenchman (Pristopomoidesaquilonaris)
Snapper Unit 2
SilkBlack BlackfinVermilion Wenchman (Pristopomoidesaquilonaris)
SilkBlack BlackfinVermilion
Snapper Unit 1
ProposedCurrentComplex
BlueMidnightRainbow
Parrotfish Unit 2
PrincessQueenRedfinRedtailStoplightRedbandStriped
BlueMidnightPrincessQueenRainbowRedfinRedtailStoplightRedbandStriped
Parrotfish
YellowedgeMisty
Grouper Unit 5
YellowfinRedTigerBlack
YellowfinRedTigerYellowedgeMisty
Grouper Unit 4
Red hindConeyRock hindGraysby
Red hindConeyRock hindGraysbyCreole-fish
Grouper Unit 3
Yellowtail SnapperYellowtail SnapperSnapper Unit 4
GrayLaneMuttonDogSchoolmasterMahogany
GrayLaneMuttonDogSchoolmasterMahogany
Snapper Unit 3
Queen Cardinal (Pristopomoidesmacrophthalmus)
Queen Wenchman (Pristopomoidesaquilonaris)
Snapper Unit 2
SilkBlack BlackfinVermilion Wenchman (Pristopomoidesaquilonaris)
SilkBlack BlackfinVermilion
Snapper Unit 1
ProposedCurrentComplex
BlueMidnightRainbow
Parrotfish Unit 2
PrincessQueenRedfinRedtailStoplightRedbandStriped
BlueMidnightPrincessQueenRainbowRedfinRedtailStoplightRedbandStriped
Parrotfish
YellowedgeMisty
Grouper Unit 5
YellowfinRedTigerBlack
YellowfinRedTigerYellowedgeMisty
Grouper Unit 4
Red hindConeyRock hindGraysby
Red hindConeyRock hindGraysbyCreole-fish
Grouper Unit 3
Yellowtail SnapperYellowtail SnapperSnapper Unit 4
GrayLaneMuttonDogSchoolmasterMahogany
GrayLaneMuttonDogSchoolmasterMahogany
Snapper Unit 3
Queen Cardinal (Pristopomoidesmacrophthalmus)
Queen Wenchman (Pristopomoidesaquilonaris)
Snapper Unit 2
SilkBlack BlackfinVermilion Wenchman (Pristopomoidesaquilonaris)
SilkBlack BlackfinVermilion
Snapper Unit 1
ProposedCurrentComplex
Terms of Reference – Data Evaluation SEDAR(paraphrased)
1) Review available data and develop recommendations regarding their accuracy and reliability. Provide complete tables.
2) Review the basis for existing stock complexes.
3) Recommend species or stock complexes for which informative SEDAR benchmark assessments may be feasible.
4) Review alternative methods for estimating mortality rates and abundance trends that might be useful for those species or stock complexes for which data are deemed sufficient.
5) Review the research and monitoring recommendations from the previous assessments in the U.S. Caribbean.
6) Provide guidance on developing ACLs given data accuracy and reliability recommendations.
Estimating Mortality from Mean Lengths in Non-equilibrium Situations
(Gedamke and Hoenig 2006)
Photos from Nancie Cummings Life History report--Photos reprinted from http://www.flmnh.ufl.edu/fish/gallery/descript/muttonsnapper/muttonsnapper.html.
Age
Freq
uenc
y
F = 0.2
F = 0.4
More Fishing Less Older/Larger Fish
5 assumptions:
1. Asymptotic growth, K and L known & constant
over time.
2. No individual variability in growth.
3. ‘Constant’ & continuous recruitment over time.
4. Mortality constant with age (eg. Selectivity, M).
5. Mortality constant over time Population in
equilibrium (mean length reflects mortality)
Beverton-Holt mean length mortality estimator
cLL
LLKZ
)(
Z2
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
0.1 - 16 14 12 11 10 9 8 7 7 0.2 23 - 9 9 8 8 7 7 6 6 0.3 26 11 - 6 6 6 6 6 6 5
Z1 0.4 27 13 7 - 4 5 5 5 5 5 0.5 28 14 8 4 - 3 4 4 4 4 0.6 28 15 9 6 3 - 2 3 4 4 0.7 29 15 10 7 5 2 - 2 3 3 0.8 29 15 10 7 5 4 2 - 2 2 0.9 29 16 10 8 6 4 3 2 - 2 1 29 16 10 8 6 5 4 3 2 -
Assumption 5
Population in equilibrium (enough time elapsed after change in mortality that mean length reflects new mortality).
Hard to meet in the real world!
Years to “reach” equilibrium after change in mortality
Life History Parameters from Goosefish
Time Relative to Change in Z
-4 -2 0 2 4 6 8 10
Me
an
Le
ngth
(cm
)
36
38
40
42
44
46
48
50fishing mortality instantaneously
increased from 0.4 to 1.0
Z will be underestimated
until new equilibrium is
reached
Time Relative to Change in Z
-4 -2 0 2 4 6 8 10
Mea
n Le
ngth
(cm
)
36
38
40
42
44
46
48
50fishing mortality instantaneously
increased from 0.4 to 1.0
With new method able to calculate mean length at any time after
change
40
45
50
55
60
65
70
75
80
85
1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010
Year
Mea
n L
eng
th (
cm)
Z = 0.14 Z = 0.31 Z = 0.56 Z = 0.25
Goosefish Mortality Estimates--Northern Management Region NEFSC Fall Groundfish Survey
Sample sizes range from 12 to 108 per year
Puerto Rico – Silk Snapper - Traps (345) – All DepthsZ = 1.12 0.31 in 2001.8
260
280
300
320
340
360
380
1980 1985 1990 1995 2000 2005 2010
Mea
n Le
ngth
(mm
)
-20
-15
-10
-5
0
5
10
15
20
25
1980 1985 1990 1995 2000 2005 2010
Res
idua
ls
Integrating Catch Rates into the Mean Length
Analysis
Model Development Extensions to base model to maximize use of available data
0
0.5
1
1.5
2
2.5
1990 1994 1998 2002 2006
Year
Catc
h I
ndex
Observed Index
Predicted Index
0
0.5
1
1.5
2
2.5
1990 1994 1998 2002 2006
Year
Catc
h I
ndex
Observed Index
Predicted Index
CP
UE
In
dex
Year
Standardized CPUE Indices—Mutton Snapper Pot Fishery—Puerto Rico
Multi-Species / Multi-Gear Approach
Assumes that species within ‘complex’ are subject to similar
patterns of effort (e.g. same year of change or same proportional
change in F)
200
220
240
260
280
300
320
340
360
380
1980 1983 1986 1989 1992 1995 1998 2001 2004 2007 2010
Mean
Len
gth
(m
m)
Blackfin
Silk
Vermillion
1.15
1.21
3.0
0.80
0.83
1.8
1
3627
3390
243
42
194
1175 284342 112
1745
60
96
4044
39 16
973
26
35
150
200
250
300
350
400
1982 1985 1988 1991 1994 1997 2000 2003 2006 2009
Mea
n L
eng
th
BlackfinSilk
Vermillion
Multi-gear Analysis – Traps and Hook/Line
1
3627
3390
243
42
194
1175 284342 112
1745
60
96
4044
39 16
973
26
35
150
200
250
300
350
400
1982 1985 1988 1991 1994 1997 2000 2003 2006 2009
Mea
n L
eng
th
BlackfinSilk
Vermillion
Multi-gear Analysis – Traps and Hook/Line
Silk
Reference lines - Expected Mean Length assuming F = M as proxy for Fmsy
1
3627
3390
243
42
194
1175 284342 112
1745
60
96
4044
39 16
973
26
35
150
200
250
300
350
400
1982 1985 1988 1991 1994 1997 2000 2003 2006 2009
Mea
n L
eng
th
BlackfinSilk
Vermillion
Multi-gear Analysis – Traps and Hook/Line
Silk
Reference lines - Expected Mean Length assuming F = M as proxy for Fmsy
Fmsy
Fcur
Fmsy / Fcur = 1.2
Terms of Reference – Data Evaluation SEDAR(paraphrased)
1) Review available data and develop recommendations regarding their accuracy and reliability. Provide complete tables.
2) Review the basis for existing stock complexes.
3) Recommend species or stock complexes for which informative SEDAR benchmark assessments may be feasible.
4) Review alternative methods for estimating mortality rates and abundance trends that might be useful for those species or stock complexes for which data are deemed sufficient.
5) Review the research and monitoring recommendations from the previous assessments in the U.S. Caribbean.
6) Provide guidance on developing ACLs given data accuracy and reliability recommendations.
Terms of Reference – Data Evaluation SEDAR(paraphrased)
1) Review available data and develop recommendations regarding their accuracy and reliability. Provide complete tables.
2) Review the basis for existing stock complexes.
3) Recommend species or stock complexes for which informative SEDAR benchmark assessments may be feasible.
4) Review alternative methods for estimating mortality rates and abundance trends that might be useful for those species or stock complexes for which data are deemed sufficient.
5) Review the research and monitoring recommendations from the previous assessments in the U.S. Caribbean.
6) Provide guidance on developing ACLs given data accuracy and reliability recommendations.
Summary Tables
Summary rating of the quality of commercial, recreational and fishery independent data available for species listed in the Caribbean Fishery Management Council’s fishery management plans.
The labels ‘BENCH’ or ‘OFL’ indicate the data may be sufficient to warrant either a full SEDAR benchmark assessment or OFL advice, respectively (it is assumed a benchmark assessment would also render OFL advice).
The numerical rating scale is: (5) reliable data for more than 10 years; (4) reliable data for recent years; (3) data for more than 10 years, but reliability, comprehensiveness or coverage is questionable; (2) data for recent years, but reliability, comprehensiveness or
coverage is questionable; (1) scattered or occasional observations, reliability questioned; (0) data unavailable or unreliable.
St. Croix
Commercial Recrea-
ional Fishery
independent FMP unit (species)
Catch Length CPUE length index length
Advice potential
Snapper Unit 1 Black snapper 0 1 0 1? 0 0 Blackfin snapper 0 3 0 1? 1 1 Silk snapper 0 3 0 1? 0 0 Vermillion snapper 0 2 0 1? 0 0 Grouper Unit 4 Tiger grouper 0 1 0 0 1 1 Yellowfin grouper 0 1 0 0 2 2 Yellowedge grouper 0 0 0 0 0 0 Misty grouper 0 1 0 0 0 0 Red grouper 0 0 0 0 0 0 ParrotFish 3 3 3 1? 3 3 BENCH Queen Conch 3 0 0 1? 3 3 Nassau grouper 0 1 0 0 3 1 Goliath grouper 0 0 0 0 0 0 Spiny lobster 3 3 3 1? 1 1 OFL Snapper Unit 2 Queen snapper 0 3 0 1? 1 1 Wenchman snapper 0 2 0 1? 0 0 Snapper Unit 3 1? Gray snapper 0 2 0 1? 3 1 Lane snapper 0 1 0 1? 3 1 Mutton snapper 0 2 0 1? 2 1 Dog snapper 0 1 0 1? 3 1 Schoolmaster snapper 0 3 0 1? 3 3 Mahogany snapper 0 2 0 1? 3 2 Snapper Unit 4 Yellowtail snapper 0 3 0 1? 3 3 Grouper Unit 3 Red hind 0 3 0 1? 3 3 Coney 0 3 0 1? 3 3 Rock hind 0 1 0 1? 3 1 Graysby 0 1 0 1? 3 1 Creole fish 0 0 0 1? 3 1 Grunts (6 spp.) 3 3 3 1? 3 1 BENCH Goatfish (2 spp.) 3 3 2 1? 3 1 OFL Porgies (4spp) 3 1 2 1? 3 1 OFL Squirrelfish (4 spp) 3 3 1 1? 3 1 OFL Tilefish (2 spp) 0 0 0 1? 3 3 Jacks (7 spp) 3 3 3 1? 3 1 OFL Surgeonfish (3 spp) 3 3 3 1? 3 3 BENCH Triggerfish & filefish (6 spp.) 3 3 3 1? 3 1 BENCH Boxfish (5 spp.) 3 3 0 1? 3 1 OFL Wrasse (3 spp.) 0 0 0 1? 3 1 Angelfish (3 spp.) 3 2 1 1? 3 1 OFL
Commercial Recrea-tional.
Fishery-independent FMP unit
(species) Catch length CPUE length index length
Advice potential
Snapper Unit 1 Black snapper 0 0 0 1? 0 0 Blackfin snapper 0 2 0 1? 0 0 Silk snapper 0 2 0 1? 0 0 Vermillion snapper 0 2 0 1? 0 0 Grouper Unit 4 Tiger grouper 0 1 0 1? 1 1 Yellowfin grouper 0 2 0 1? 2 2 Yellowedge grouper 0 0 0 1? 0 0 Misty grouper 0 1 0 1? 0 0 Red grouper 0 1 0 1? 0 0 ParrotFish 3 2 2 1? 3 3 BENCH Queen Conch 3 0 0 1? 3 3 Nassau grouper 0 1 0 1? 3 3 Goliath grouper 0 0 0 1? 0 0 Spiny lobster 3 3 3 1? 1 1 OFL Snapper Unit 2 Queen snapper 0 2 0 1? 1 1 Wenchman snapper 0 1 0 1? 1 1 Snapper Unit 3 0 1? Gray snapper 0 1 0 1? 3 3 Lane snapper 0 2 0 1? 3 3 Mutton snapper 0 2 0 1? 1 1 Dog snapper 0 1 0 1? 1 1 Schoolmaster snapper 0 2 0 1? 3 3 Mahogany snapper 0 1 0 1? 3 3 Snapper Unit 4 Yellowtail snapper 0 3 0 1? 3 3 Grouper Unit 3 Red hind 0 3 0 1? 3 3 Coney 0 3 0 1? 3 3 Rock hind 0 1 0 1? 3 3 Graysby 0 1 0 1? 3 3 Creole fish 0 0 0 1? 3 3 Grunts (6 spp.) 3 3 2 1? 3 3 OFL Goatfish (2 spp.) 1 1 1 1? 3 3 Porgies (4spp) 3 1 2 1? 3 3 OFL Squirrelfish (4 spp) 3 2 2 1? 3 3 OFL Tilefish (2 spp) 0 0 0 1? 2 2 Jacks (7 spp) 3 3 3 1? 3 3 OFL Surgeonfish (3 spp) 3 3 2 1? 3 3 OFL Triggerfish & filefish (6 spp.) 3 3 3 1? 3 3 BENCH Boxfish (5 spp.) 3 2 0 1? 3 3 OFL Wrasse (3 spp.) 3 0 0 1? 3 3 OFL
St. Thomas/St. John
Puerto Rico
Commercial Recrea-tional
Fishery-independent FMP unit
(species) Catch length CPUE length index length
Advice potential
Snapper Unit 1 Black snapper 3 1 0 2 0 0 Blackfin snapper 3 2 1 2 1 1 Silk snapper 3 3 3 2 0 3 BENCH Vermillion snapper 3 3 1 2 1 1 OFL Grouper Unit 4 Tiger grouper 1 2 0 2 1 1 Yellowfin grouper 3 1 1 2 2 2 Yellowedge grouper 0 0 0 2 0 0 Misty grouper 3 2 1 2 0 0 Red grouper 0 1 0 2 0 0 ParrotFish 3 3 3 2 3 3 BENCH Queen Conch 3 0 0 2 3 3 OFL Nassau grouper 3 2 1 2 1 1 Goliath grouper 0 1 0 2 0 0 Spiny lobster 3 3 3 2 1 1 OFL Snapper Unit 2 Queen snapper 3 3 3 2 0 0 BENCH Wenchman snapper 1 2 1 2 0 0 Snapper Unit 3 Gray snapper 1 3 0 2 3 3 Lane snapper 3 3 3 2 3 3 OFL Mutton snapper 3 3 3 2 1 1 OFL Dog snapper 1 3 0 2 3 3 Schoolmaster snapper 0 3 0 2 3 3 Mahogany snapper 1 3 0 2 3 3 Snapper Unit 4 Yellowtail snapper 3 3 3 2 3 3 OFL Grouper Unit 3 Red hind 3 3 3 2 3 3 OFL Coney 3 3 1 2 3 3 OFL Rock hind 0 1 0 2 3 3 Graysby 0 3 0 2 3 3 Creole fish 0 0 0 2 3 3 Grunts (6 spp.) 3 3 3 2 3 3 BENCH Goatfish (2 spp.) 3 3 1 2 3 3 OFL Porgies (4spp) 3 3 1 2 3 3 OFL Squirrelfish (4 spp) 3 1 1 2 3 3 OFL Tilefish (2 spp) 1 1 0 2 3 3 Jacks (7 spp) 3 3 1 2 3 3 OFL Surgeonfish (3 spp) 0 1 0 2 3 3 Boxfish (5 spp.) 3 2 3 2 3 3 OFL Wrasse (3 spp.) 3 0 0 2 3 3 OFL Angelfish (3 spp.) 0 1 0 2 3 3
Conclusions/Recommendations of Caribbean Data Evaluation SEDAR
If stock has adequate length and catch data (listed as ‘OFL’ in Summary Table)
• Estimate total mortality (Z) using the Gedamke and Hoenig (2006) base model and newly developed multispecies/multigear extensions to the method.
• Compute recent fishing mortality rate by subtracting out an assumed natural mortality rate (F = Z – M).
• Select a proxy for FMSY such as the natural mortality rate or the fishing mortality rate associated with a given spawning potential ratio
• Set OFL = FMSY*(recent average catch)/F
Otherwise, if no reliable catch data exist, develop rationale for alternative management measures that do not conform to the framework established in the NS1 guidelines.
Otherwise, if stock has adequate catch data, then use informed judgment
• if consensus can be reached on a proxy for FMSY and the level of depletion relative to unfished levels, d = (Bfirst – Blast)/B0, then set OFL = (average catch)/(n + d/(0.4*FMSY))
• if consensus can be reached on a vulnerability scalar from a PSA analysis, then set OFL = (average catch) * vulnerability scalar
• if no consensus can be reached, adopt protocol of PFMC, i.e., OFL = average catch and ABC = 0.5*(average catch).
Conclusions/Recommendations of Caribbean Data Evaluation SEDAR
If stock has adequate length and catch data (listed as ‘OFL’ in Summary Table)
• Estimate total mortality (Z) using the Gedamke and Hoenig (2006) base model and newly developed multispecies/multigear extensions to the method.
• Compute recent fishing mortality rate by subtracting out an assumed natural mortality rate (F = Z – M).
• Select a proxy for FMSY such as the natural mortality rate or the fishing mortality rate associated with a given spawning potential ratio
• Set OFL = FMSY*(recent average catch)/F
Otherwise, if no reliable catch data exist, develop rationale for alternative management measures that do not conform to the framework established in the NS1 guidelines.
Otherwise, if stock has adequate catch data, then use informed judgment
• if consensus can be reached on a proxy for FMSY and the level of depletion relative to unfished levels, d = (Bfirst – Blast)/B0, then set OFL = (average catch)/(n + d/(0.4*FMSY)) - (Alec MacCall – DCAC)
• if consensus can be reached on a vulnerability scalar from a PSA analysis, then set OFL = (average catch) * vulnerability scalar
• if no consensus can be reached, adopt protocol of PFMC, i.e., OFL = average catch and ABC = 0.5*(average catch).
Conclusions/Recommendations of Caribbean Data Evaluation SEDAR
If stock has adequate length and catch data (listed as ‘OFL’ in Summary Table)
• Estimate total mortality (Z) using the Gedamke and Hoenig (2006) base model and newly developed multispecies/multigear extensions to the method.
• Compute recent fishing mortality rate by subtracting out an assumed natural mortality rate (F = Z – M).
• Select a proxy for FMSY such as the natural mortality rate or the fishing mortality rate associated with a given spawning potential ratio
• Set OFL = FMSY*(recent average catch)/F
Otherwise, if no reliable catch data exist, develop rationale for alternative management measures that do not conform to the framework established in the NS1 guidelines.
Otherwise, if stock has adequate catch data, then use informed judgment
• if consensus can be reached on a proxy for FMSY and the level of depletion relative to unfished levels, d = (Bfirst – Blast)/B0, then set OFL = (average catch)/(n + d/(0.4*FMSY))
• if consensus can be reached on a vulnerability scalar from a PSA analysis, then set OFL = (average catch) * vulnerability scalar
• if no consensus can be reached, adopt protocol of PFMC, i.e., OFL = average catch and ABC = 0.5*(average catch).
Todd Gedamke (SEFSC)
Thank you!
Meeting summary for: Caribbean Data Evaluation SEDAR
March, 2009
Summary CFMC Annual Catch Limit Working Group (ACLG)
MeetingCAROLINA, PUERTO RICO
FEBRUARY 23-25, 2009
Todd Gedamke (SEFSC)
Day 1 – SEDAR Report and Summary/Discussion of Methodologies
Day 2 – Two Working Groups: -Productivity-Susceptibility Analysis-Development of Decision Table for
setting of ACL’s (Scenarios table)
Day 3 – Discussion, Evaluation of Recent Catch, and recommendations for ACL’s
Attributes List (N = 22)Scored on a 1-3 scale (high, med, low)
Separate weighting score
Productivity
•Intrinsic rate of increase (r)
•Maximum age (Tmax)
•Maximum size (Lmax)
•Growth Coefficient (k)
•Natural Mortality (M)
•Fecundity
•Breeding Strategy
•Recruitment Pattern
•Age at Maturity (Tmat)
•Mean Trophic Level
Susceptibility
•Management Strategy
•Areal Overlap (range)
•Geographic Concentration
•Vertical Overlap (water depth)
•Fishing Rate (F) relative to M
•Biomass of Spawners (SSB) or other proxies
•Seasonal Migrations
•Schooling/Aggregation and Other Behavioral Responses
•Morphology Affecting Capture
•Survival After Capture and Release
•Desirability/Value of the Fishery
•Fishery Impact to EFH or Habitat in General for Non-targets
ACLG Working Group – Decision Table for ACL’sScenario 1 Scenario 2 Scenario 3 Scenario 4 Scenario 5 Scenario 6 Scenario 7 Scenario 8
Life History Demographics Yes Yes Not useful Yes/No Yes Yes Yes/NoRepresentative Lengths Yes Yes Yes No Yes Yes No - single time period (recent only) Yes Yes Yes No Yes Yes No - multiple time period Yes No Yes No Yes Yes NoCatch Yes Yes Yes Yes No Yes NoNo recruitment anomaly Yes Yes Yes NA Yes NA
Can trend in stock be determined? Yes No Yes No Yes No NoCan stock status be determined? Yes Yes (with lag) No No Yes No NoCan OFL be determined? Yes No No No No No NoCan ABC be determined? Yes No No No No No NoCan ACL be determined? Yes No No No No No No
Management Advice:
Notes: Catch should not be increased if
overfishing may be taking place.
Can give management advice (e.g.,
effort), but not
Council may place additional limits if it
wants to be precautionary.
May take into account vulnerability using
scalers
Catch level should not exceed
average catch in recent years
(determined on a case by case
Taking into account fishery
independent research, control a
fishery with the purpose of
collecting needed data. Catch and/or effort is limited to what is required to collect sufficient
data.
If trend in F is increasing, catch level should be reduced from
recent levels. If not, catch level
should not exceed recent catch.
Participation in the fishery is
dependent on following all data
collection protocols.
May take into account vulnerability using
scalers
May take into account vulnerability using
scalers
May take into account vulnerability using
scalers
OFL would be >, =, or < recent catch based on ratio of
Fmsy/F.
Decrease if Council wants to be
precautionary
Decrease if Council wants to be
precautionary
Decrease if Council wants to be
precautionary
Catch would need to be set lower
than in Scenario 1 because of single point estimate and possible time lag
due to non-equilibrium status.
No there are anomalies
identified
Catch level should not exceed recent catch. If F/Fmsy >1 then reduce catch based on
The result is the same as Scenario 4. If it's possible to
correct for the anomaly, it
becomes the same as Scenario 1.
Note: SEDAR recommended
treating this situation as having
no length data (Scenario 4).
Fishery determined to be underutilized
Decrease if Council wants to be
precautionary
May take into account vulnerability using
scalers
Taking into account fishery
independent research, control a
fishery with the purpose of
collecting needed data. Catch and/or effort is limited to control the rate of
development of the fishery to avoid
overshooting OFL.
Scenario 1 Scenario 2 Scenario 3 Scenario 4 Scenario 5 Scenario 6 Scenario 7 Scenario 8Life History Demographics Yes Yes Not useful Yes/No Yes Yes Yes/NoRepresentative Lengths Yes Yes Yes No Yes Yes No - single time period (recent only) Yes Yes Yes No Yes Yes No - multiple time period Yes No Yes No Yes Yes NoCatch Yes Yes Yes Yes No Yes NoNo recruitment anomaly Yes Yes Yes NA Yes NA
Can trend in stock be determined? Yes No Yes No Yes No NoCan stock status be determined? Yes Yes (with lag) No No Yes No NoCan OFL be determined? Yes No No No No No NoCan ABC be determined? Yes No No No No No NoCan ACL be determined? Yes No No No No No No
Management Advice: OFL would be >, =, or < recent catch based on ratio of
Fmsy/F.
ACLG Working Group – Decision Table for ACL’s
Scenario 1 Scenario 2 Scenario 3 Scenario 4 Scenario 5 Scenario 6 Scenario 7 Scenario 8Life History Demographics Yes Yes Not useful Yes/No Yes Yes Yes/NoRepresentative Lengths Yes Yes Yes No Yes Yes No - single time period (recent only) Yes Yes Yes No Yes Yes No - multiple time period Yes No Yes No Yes Yes NoCatch Yes Yes Yes Yes No Yes NoNo recruitment anomaly Yes Yes Yes NA Yes NA
Can trend in stock be determined? Yes No Yes No Yes No NoCan stock status be determined? Yes Yes (with lag) No No Yes No NoCan OFL be determined? Yes No No No No No NoCan ABC be determined? Yes No No No No No NoCan ACL be determined? Yes No No No No No No
Management Advice: OFL would be >, =, or < recent catch based on ratio of
Fmsy/F.
ACLG Working Group – Decision Table for ACL’s
cLL
LLKZ
)(
Beverton-Holt mean length mortality estimator
length at which all animals are fully vulnerable to gear
mean lengthtotal mortality
growth rate maximum length
Scenario 1 Scenario 2 Scenario 3 Scenario 4 Scenario 5 Scenario 6 Scenario 7 Scenario 8Life History Demographics Yes Yes Not useful Yes/No Yes Yes Yes/NoRepresentative Lengths Yes Yes Yes No Yes Yes No - single time period (recent only) Yes Yes Yes No Yes Yes No - multiple time period Yes No Yes No Yes Yes NoCatch Yes Yes Yes Yes No Yes NoNo recruitment anomaly Yes Yes Yes NA Yes NA
Can trend in stock be determined? Yes No Yes No Yes No NoCan stock status be determined? Yes Yes (with lag) No No Yes No NoCan OFL be determined? Yes No No No No No NoCan ABC be determined? Yes No No No No No NoCan ACL be determined? Yes No No No No No No
Management Advice: OFL would be >, =, or < recent catch based on ratio of
Fmsy/F.
ACLG Working Group – Decision Table for ACL’s
# of
mea
sure
d fi
sh (
norm
aliz
ed b
y an
nual
tota
ls)
Change in proportions of regions sampled (two different periods indicated by red arrows
Puerto Rico – Hook and Line (610) -Snapper Unit 1
• Limited information available to evaluate spatial changes (USVI distance from shore variable uninformative)
• Deep water snapper fishery (WNW Puerto Rico) needs to be evaluated separately
Highlighted the need to collect better spatial and depth
information
Time Relative to Change in Z
-4 -2 0 2 4 6 8 10
Me
an
Le
ngth
(cm
)
36
38
40
42
44
46
48
50fishing mortality instantaneously
increased from 0.4 to 1.0
Z will be underestimated
until new equilibrium is
reached
Tiger Grouper – Hook and Line – Code 610 – Puerto Rico
ZBevHolt = 0.59
Given:Linf = 740 mmK = 0.11 yr-1
M = 0.115 yr-1
Lc = 514.5 mm
• If Lmean =550 mm then ZBevHolt = 0.59 yr-1
Tiger Grouper – Hook and Line – Code 610 – Puerto Rico
ZBevHolt = 0.59
Given:Linf = 740 mmK = 0.11 yr-1
M = 0.115 yr-1
Lc = 514.5 mm
• If Lmean =550 mm then ZBevHolt = 0.59 yr-1
?
Tiger Grouper – Hook and Line – Code 610 – Puerto Rico
ZBevHolt = 0.59
587mm when F=M
Given:Linf = 740 mmK = 0.11 yr-1
M = 0.115 yr-1
Lc = 514.5 mm (Ault =300 mm)
• If Lmean = 550 mm then ZBevHolt = 0.59 yr-1
• When F = M, Lmean = 587 mm
Tiger Grouper – Hook and Line – Code 610 – Puerto Rico
ZBevHolt = 0.18
ZBevHolt = 0.59
587mm when F=M
Given:Linf = 740 mmK = 0.11 yr-1
M = 0.115 yr-1
Lc = 514.5 mm (Ault =300 mm)
• If Lmean = 550 mm then ZBevHolt = 0.59 yr-1
• When F = M Lmean = 587 mm
• If Lmean = 600 mm then ZBevHolt = 0.18 yr-1
?
Scenario 1 Scenario 2 Scenario 3 Scenario 4 Scenario 5 Scenario 6 Scenario 7 Scenario 8Life History Demographics Yes Yes Not useful Yes/No Yes Yes Yes/NoRepresentative Lengths Yes Yes Yes No Yes Yes No - single time period (recent only) Yes Yes Yes No Yes Yes No - multiple time period Yes No Yes No Yes Yes NoCatch Yes Yes Yes Yes No Yes NoNo recruitment anomaly Yes Yes Yes NA Yes NA
Can trend in stock be determined? Yes No Yes No Yes No NoCan stock status be determined? Yes Yes (with lag) No No Yes No NoCan OFL be determined? Yes No No No No No NoCan ABC be determined? Yes No No No No No NoCan ACL be determined? Yes No No No No No No
Management Advice: OFL would be >, =, or < recent catch based on ratio of
Fmsy/F.
ACLG Working Group – Decision Table for ACL’s
Age
Freq
uenc
y
F = 0.2
F = 0.4
More Fishing Less Older/Larger Fish
Constant Recruitment
Scenario 1 Scenario 2 Scenario 3 Scenario 4 Scenario 5 Scenario 6 Scenario 7 Scenario 8Life History Demographics Yes Yes Not useful Yes/No Yes Yes Yes/NoRepresentative Lengths Yes Yes Yes No Yes Yes No - single time period (recent only) Yes Yes Yes No Yes Yes No - multiple time period Yes No Yes No Yes Yes NoCatch Yes Yes Yes Yes No Yes NoNo recruitment anomaly Yes Yes Yes NA Yes NA
Can trend in stock be determined? Yes No Yes No Yes No NoCan stock status be determined? Yes Yes (with lag) No No Yes No NoCan OFL be determined? Yes No No No No No NoCan ABC be determined? Yes No No No No No NoCan ACL be determined? Yes No No No No No No
Management Advice:
Notes: Catch should not be increased if
overfishing may be taking place.
Can give management advice (e.g.,
effort), but not
Council may place additional limits if it
wants to be precautionary.
May take into account vulnerability using
scalers
Catch level should not exceed
average catch in recent years
(determined on a case by case
If trend in F is increasing, catch level should be reduced from
recent levels. If not, catch level
should not exceed recent catch.
May take into account vulnerability using
scalers
May take into account vulnerability using
scalers
May take into account vulnerability using
scalers
OFL would be >, =, or < recent catch based on ratio of
Fmsy/F.
Decrease if Council wants to be
precautionary
Decrease if Council wants to be
precautionary
Decrease if Council wants to be
precautionary
Catch would need to be set lower
than in Scenario 1 because of single point estimate and possible time lag
due to non-equilibrium status.
Catch level should not exceed recent catch. If F/Fmsy >1 then reduce catch based on
Decrease if Council wants to be
precautionary
May take into account vulnerability using
scalers
Scenario 1 Scenario 2 Scenario 3 Scenario 4 Scenario 5 Scenario 6 Scenario 7 Scenario 8Life History Demographics Yes Yes Not useful Yes/No Yes Yes Yes/NoRepresentative Lengths Yes Yes Yes No Yes Yes No - single time period (recent only) Yes Yes Yes No Yes Yes No - multiple time period Yes No Yes No Yes Yes NoCatch Yes Yes Yes Yes No Yes NoNo recruitment anomaly Yes Yes Yes NA Yes NA
Can trend in stock be determined? Yes No Yes No Yes No NoCan stock status be determined? Yes Yes (with lag) No No Yes No NoCan OFL be determined? Yes No No No No No NoCan ABC be determined? Yes No No No No No NoCan ACL be determined? Yes No No No No No No
Management Advice:
Notes:
May take into account vulnerability using
scalers
OFL would be >, =, or < recent catch based on ratio of
Fmsy/F.
Decrease if Council wants to be
precautionary
Scenario 1 Scenario 2 Scenario 3 Scenario 4 Scenario 5 Scenario 6 Scenario 7 Scenario 8Life History Demographics Yes Yes Not useful Yes/No Yes Yes Yes/NoRepresentative Lengths Yes Yes Yes No Yes Yes No - single time period (recent only) Yes Yes Yes No Yes Yes No - multiple time period Yes No Yes No Yes Yes NoCatch Yes Yes Yes Yes No Yes NoNo recruitment anomaly Yes Yes Yes NA Yes NA
Can trend in stock be determined? Yes No Yes No Yes No NoCan stock status be determined? Yes Yes (with lag) No No Yes No NoCan OFL be determined? Yes No No No No No NoCan ABC be determined? Yes No No No No No NoCan ACL be determined? Yes No No No No No No
Management Advice:
Notes:
Can give management advice (e.g.,
effort), but not
Council may place additional limits if it
wants to be precautionary.
May take into account vulnerability using
scalers
Catch level should not exceed
average catch in recent years
(determined on a case by case
Taking into account fishery
independent research, control a
fishery with the purpose of
collecting needed data. Catch and/or effort is limited to what is required to collect sufficient
data.
Participation in the fishery is
dependent on following all data
collection protocols.
May take into account vulnerability using
scalers
Decrease if Council wants to be
precautionary
No there are anomalies
identified
The result is the same as Scenario 4. If it's possible to
correct for the anomaly, it
becomes the same as Scenario 1.
Fishery determined to be underutilized
Taking into account fishery
independent research, control a
fishery with the purpose of
collecting needed data. Catch and/or effort is limited to control the rate of
development of the fishery to avoid
overshooting OFL.
Summary ACLG Scenario Recommendations
PR STT STX
QC ACL EEZ =0
closely monitor
ACL=50,000 lb
ACL EEZ=0
(ACL=EEZ+State=50,000 lb; 200 qc/boat
5-month closed
Nassau ABC=0
monitor aggregations
ABC=0 ABC=0
NOTE: Commercial Sector
Summary ACLG Scenario Recommendations
PR STT STX
Parrotfish 3 (99-06 avg.) (80,000)
4 (94-06 avg.) (ABC=50,000)
4 (94-06 avg.) (max. 270,000)
GU4 7 7
SU1 1 (99-06 avg.)
(284,400)
7 7
NOTE: Commercial Sector
Todd Gedamke (SEFSC)
Thank you!
Meeting summary for: CFMC ACLG Group
March, 2009