Slide 1

Experiences and activities in Norway and Europe, based on studies of the European lobster Homarus gammarus Gro I. van der Meeren, Halvor Knutsen, Jan Atle Knutsen, Ann-Lisbeth Agnalt and colleagues Based on a presentation at RALBAM, Chennai, India 4-8 January 2010 Stock Enhancement in Norway Slide 2 Lobster fisheries in Norway and Europe Rebuilding the lobster stock Stock enhancement Release protocols Carrying capacity Habitat Recapture Life in the sea Juvenile quality Marine protected areas Slide 3 Releases at Kvitsy 1990 - 1994 0 500 1000 1500 192019301940195019601970198019902000 Agnalt and Jrstad, 2002 Year Catch (tons) Lobster fisheries in Norway Slide 4 Hatchery: Larval rearing Juvenile rearing Ongrowth Sea ranching: Transportation Release Recapture Steps in Lobster Production Slide 5 Photo: Eva Farestveit, IMR Photo: K. Jrstad, IMR Individual rearing Communal rearing Juvenile rearing Hatchery Slide 6 Growth Experiments by: Knut Jrstad, et al. 2001 (communal and single rearing) G.I. van der Meeren, not published (sea cages) Communal rearing Sea cages Single rearing Juvenile rearing Hatchery Slide 7 From leaflet by Norsk Hummer A/S Juvenile rearing Hatchery Slide 8 Photo and patent rights: Aegir AS Lobster house to place in the sea Juvenile rearing Hatchery Slide 9 Construction: Andreas Gjermundsen og Espen Eriksen, NTNU Construction: Helge Knudsen, IMR Juvenile rearing Hatchery Slide 10 From: Beard and Wickins 1992 Release Release procedures Slide 11 Releases in Europe, 1970-1995 Data: Ann-Lisbeth Agnalt, IMR Years of Age atTot. CountryLocationresearch# Releasedrelease# Recapt. Recap.% FranceBretagne102-3 weeks ?? IrelandAlong coast42-4 weeks ?? France5~1 year220,09 10~1 year6531,3 "104532,4 "9~1 year581,9 "9~1 year3071,6 Norway9~1 year5 1154 Age atTot. Locationresearch# Releasedrelease# Recapt. Recap.% FranceBretagne10 Up to 225 000 2-3 weeks ?? IrelandAlong coast42-4 weeks ?? France5~1 year220,09 10~1 year6531,3 "104532,4 "9~1 year581,9 "9~1 year3071,6 Norway Bretagne Wales N. Scotland Kvitsy East England W. Scotland 9 292 000 25 480 49 128 19 233 3 044 19 520 127 945~1 year 5 115 6,2 Country RegionDuration Years Numbers released Age at release Recapture% France Ireland France Gr.Britt. Gr.Britt. Norway Weeks Year 7 950 10 Slide 12 Recaptures, Kvitsy, Norway Data: Ann-Lisbeth Agnalt et al., IMR 2001 Slide 13 0 2 4 6 8 10 92-H93-H94-H95-H96-H97-H98-H99-H Season Cumulativ recapture 88 89 90 91 92 93 Data: Ann-Lisbeth Agnalt et al., IMR 2000 Recaptures of annual clutches Kvitsy, Norway Release year Slide 14 CANO WP3 - Lobster Estimate carrying capacity (juvenile density) in early stages, in releases with European lobster (enhancement/ranching) Ann-Lisbeth Agnalt, Eva Farestveit, K.E. Jrstad Life in the sea Aim: Slide 15 Hartvig Christie, NIVA Life in the sea Artificial shelters Slide 16 Artificial reefs in Sweden N. Egriell, M. Ulmestrand, J. Andersson, B. Gustafsson, T. Lundlv, C. Erlandsson, L. Jonsson, T. Ahsberg Municipal authorities og Gothenburg, Swedish ship trafic authorities, GothenburgUniversity, Directorate of Fisheries EU Life in the sea Slide 17 Juvenile quality Genetics Anatomy Neurology Fitness Behaviour Slide 18 Juvenile quality Genetics Jrstad et al., 2005 Slide 19 Juvenile quality Morphology van der Meeren & Uksny 2000 Slide 20 Lobster brain BrdU-labelled lobster brain LPZ 56 m Juvenile quality van der Meeren et al, in prep Neurology Slide 21 Neurogenesis and growth in cultivated lobster juveniles Juvenile quality van der Meeren et al, in prep Neurology Slide 22 Fitness Juvenile quality Photo: Eva Farestveit, IMR Photo: K. Jrstad, IMR Jrstad, et al. 2009 Slide 23 Juvenile quality Behaviour Photo: T. van der Meeren Slide 24 Life in the sea From video by Eva Farestveit, IMR Slide 25 Thank you