Effects of pre-release acclimatization period on salmon return rates
42.000 1+smolts of Atlantic salmon were size graded into two size groups and released during three weeks in spring 1993; one group of small and one of large smolts on each of the four release days. Approximately 25% of the fish had been individually tagged using Carlin-tags. The fish were transferre...
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ftimr:oai:imr.brage.unit.no:11250/105451 2023-05-15T15:32:33+02:00 Effects of pre-release acclimatization period on salmon return rates Skilbrei, Ove Holm, Marianne Jakobsen, Per J. 1995 application/pdf http://hdl.handle.net/11250/105451 eng eng ICES ICES CM Documents;1995/M:13 This report is not to be cited without prior reference to the authors http://hdl.handle.net/11250/105451 10 s. salmon laks fish stocking utsetting av fisk recapture gjenfangst survival overlevelse smolt VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 Working paper 1995 ftimr 2021-09-23T20:14:57Z 42.000 1+smolts of Atlantic salmon were size graded into two size groups and released during three weeks in spring 1993; one group of small and one of large smolts on each of the four release days. Approximately 25% of the fish had been individually tagged using Carlin-tags. The fish were transferred to net pens in a small marine bay in which estuarine salinity gradients had been established by a tarpaulin barrier. The smolts were held in the net pens for three days prior to the first and third release day and seven days before the second and fourth release day. Total recoveries of Carlin-tagged grilse in 1994 showed higher return rates for smolts acclimatized for three days compared with seven days. The difference was small for large smolts, but significant for small smolts, as return rate for the three days acclimatization was twice that of seven days acclimatization. The retum of precocious mature males, males that were mature prior to release, were clearly higher than that of other smolts. Possible causes for these differences are discussed. Report Atlantic salmon Institute for Marine Research: Brage IMR |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
salmon laks fish stocking utsetting av fisk recapture gjenfangst survival overlevelse smolt VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 |
spellingShingle |
salmon laks fish stocking utsetting av fisk recapture gjenfangst survival overlevelse smolt VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 Skilbrei, Ove Holm, Marianne Jakobsen, Per J. Effects of pre-release acclimatization period on salmon return rates |
topic_facet |
salmon laks fish stocking utsetting av fisk recapture gjenfangst survival overlevelse smolt VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ethology: 485 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923 |
description |
42.000 1+smolts of Atlantic salmon were size graded into two size groups and released during three weeks in spring 1993; one group of small and one of large smolts on each of the four release days. Approximately 25% of the fish had been individually tagged using Carlin-tags. The fish were transferred to net pens in a small marine bay in which estuarine salinity gradients had been established by a tarpaulin barrier. The smolts were held in the net pens for three days prior to the first and third release day and seven days before the second and fourth release day. Total recoveries of Carlin-tagged grilse in 1994 showed higher return rates for smolts acclimatized for three days compared with seven days. The difference was small for large smolts, but significant for small smolts, as return rate for the three days acclimatization was twice that of seven days acclimatization. The retum of precocious mature males, males that were mature prior to release, were clearly higher than that of other smolts. Possible causes for these differences are discussed. |
format |
Report |
author |
Skilbrei, Ove Holm, Marianne Jakobsen, Per J. |
author_facet |
Skilbrei, Ove Holm, Marianne Jakobsen, Per J. |
author_sort |
Skilbrei, Ove |
title |
Effects of pre-release acclimatization period on salmon return rates |
title_short |
Effects of pre-release acclimatization period on salmon return rates |
title_full |
Effects of pre-release acclimatization period on salmon return rates |
title_fullStr |
Effects of pre-release acclimatization period on salmon return rates |
title_full_unstemmed |
Effects of pre-release acclimatization period on salmon return rates |
title_sort |
effects of pre-release acclimatization period on salmon return rates |
publisher |
ICES |
publishDate |
1995 |
url |
http://hdl.handle.net/11250/105451 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
10 s. |
op_relation |
ICES CM Documents;1995/M:13 This report is not to be cited without prior reference to the authors http://hdl.handle.net/11250/105451 |
_version_ |
1766363045453365248 |