GIANT OTTER IN BOLIVIA: THE NATIONAL SURVEY - FBDSfbds.org.br/fbds/IMG/pdf/doc-82.pdf · GIANT...
Transcript of GIANT OTTER IN BOLIVIA: THE NATIONAL SURVEY - FBDSfbds.org.br/fbds/IMG/pdf/doc-82.pdf · GIANT...
InputsSurveys in the Noel Kempff Mercado
National ParkSurveys in the Bolivian PantanalSurveys in the Isiboro-Secure National
ParkSurveys in the Reserva ItenezEtc.
Square sizeSquare size
25 * 25 km 625 km2
50 * 50 km 2 500 km2
100 * 100 km 10 000 km2
15’ * 15’ 729 km2
30’ * 30’ 2 916 km2
1° * 1° 11 664 km2
Size of Protected Areas in Bolivia
PN Noel Kempff Mercado 15 234 km2 +
PN Isiboro Sécure 12 363 km2 +
RB Estación Biol. Beni 1 350 km2 -
ANMI San Matías 29 185 km2 +
PN-ANMI Otúquis 10 059 km2 +
PN Manuripi Heath 7 470 km2 +
PN Madidi (18 957 km2) +
PN Carrasco (6 266 km2) -
ANMI Amboró (6 376 km2) -
15’ * 15’ 729 km2 1120 (999+1212)
30’ * 30’ 2 916 km2 258 (182+76)
1° * 1° 11 664 km2 74 (37+40)
Square number in Bolivia using different grid sizes
Thoughts & ideas : 1Designing the GO survey strategy, we
should not take TOO much the European Otter continentental survey as an example
* GO lives in groups, EO is solitary* Marking behaviour is very different (EO: bridges)•Survey site selection is basically different (complicated in the case of GO)* Distribution patterns are different
Thoughts & Ideas: 2Should grid size be based on territory
size or on dispersal capacity of solitary individuals?
Thoughts & Ideas: 3The objective of the continental survey
is NOT (in the first place) to know where Giant Otter DO occur
The objective of the continental survey is YES to know where Giant Otter DO NOT occur (the gaps).
Thoughts & Ideas: 4 The grid size should
be chosen with an a priori idea of the possible results and based on clear objectives
100*100km
50*50km
(The biggest possibleGrid size should be chosen)
Ideas & Thoughts: 5A continental distribution survey based
on a small grid size completed after 20 years is less useful than a continental distribution survey based on a large grid size completed after 3 years
FEASIBILITY > DESIRABILITY
Thoughts & Ideas: 6 Priorization of survey areas:
- climate- geomorphology- Protected areas- IndigenousTerritories- Human presence- Accesibility
Prediction of GO in Bolivia
Squares of 1° * 1°
(11 664 km2)
114 quadrantes en Bolivia
74 quadrantes < 500 msnm
55 quadrantes < 500 msnm y en hidro- ecoregiones con probabilidad alta
47 quadrantes < 500 msnm, en Hidro-ecoregiones con probabilidad alta y en zonas con bajo impacto humano
Thoughts & Ideas: 7The continental survey and grid size
should be a compromise between efficiency and cost 1º<* 1º (11 664 km2) apr. 50 squares
50 000 US$ 1 000 man*days (2 persons: 4 years)
30’ * 30’ (2 916 km2) apr. 200 squares
200 000 US$ 4 000 man*days (2 persons: 12 years)
1° * 1° (729 km2) apr. 900 squares
900 000 US$ 18 000 man*days (2 persons: 23 years)
Thoughts & Ideas: 8 We should see
which approach is more useful: focus on Giant Otter STRONGHOLDS and then CORREDORS, etc.
OR: a focus on grid sizes
OR: a combination of both
1
21 Strongholds2 Corredors
Thoughts & Ideas: 9A range-wide GO distribution survey
should be based on the highest grid size possible (taking into account accesibility, time frame and cost),
and should preferably be combined with GO distribution surveys on a local scale using the lowest grid size possible.