Growth rate and age at sexual maturity of Atlantic salmon smoltifying aged one and two years
Post-smolt growth rate and age at first maturation are compared for sib groups or population groups of salmon originating from Norwegian rivers and fish farms. Generally, high correlations were found between corresponding values (lengths at different ages and proportions of mature fish in the second...
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[Fiskeridirektoratets havforskningsinstitutt]
1979
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ftimr:oai:imr.brage.unit.no:11250/114570 2023-05-15T15:32:17+02:00 Growth rate and age at sexual maturity of Atlantic salmon smoltifying aged one and two years Nævdal, Gunnar Bjerk, Øyvind Holm, Marianne Lerøy, Rita Møller, Dag 1979 312515 bytes application/pdf http://hdl.handle.net/11250/114570 eng eng [Fiskeridirektoratets havforskningsinstitutt] Fiskeridirektoratets skrifter, Serie Havundersøkelser vol 17 no 1 http://hdl.handle.net/11250/114570 s. 11-17 Research report 1979 ftimr 2021-09-23T20:14:13Z Post-smolt growth rate and age at first maturation are compared for sib groups or population groups of salmon originating from Norwegian rivers and fish farms. Generally, high correlations were found between corresponding values (lengths at different ages and proportions of mature fish in the second and third sea years) for one and two year-old smolt. One year-old smolts were smaller than the two-year olds at the smolt stage and grew slower during their first sea year, but the two categories reached practically the same total length after two years in the sea. In most groups, and in the total material, one year-old smolts gave higher proportions of grilse. Proportions of mature fish during their third sea year were similar for one and two year-old smolt of the same groups. Pronounced variations between sib groups and population groups were found both in growth rate and mean age at first maturation. This variation was much bigger than the variation between one and two year-old smolts of the same sib group. Report Atlantic salmon Institute for Marine Research: Brage IMR |
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Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
description |
Post-smolt growth rate and age at first maturation are compared for sib groups or population groups of salmon originating from Norwegian rivers and fish farms. Generally, high correlations were found between corresponding values (lengths at different ages and proportions of mature fish in the second and third sea years) for one and two year-old smolt. One year-old smolts were smaller than the two-year olds at the smolt stage and grew slower during their first sea year, but the two categories reached practically the same total length after two years in the sea. In most groups, and in the total material, one year-old smolts gave higher proportions of grilse. Proportions of mature fish during their third sea year were similar for one and two year-old smolt of the same groups. Pronounced variations between sib groups and population groups were found both in growth rate and mean age at first maturation. This variation was much bigger than the variation between one and two year-old smolts of the same sib group. |
format |
Report |
author |
Nævdal, Gunnar Bjerk, Øyvind Holm, Marianne Lerøy, Rita Møller, Dag |
spellingShingle |
Nævdal, Gunnar Bjerk, Øyvind Holm, Marianne Lerøy, Rita Møller, Dag Growth rate and age at sexual maturity of Atlantic salmon smoltifying aged one and two years |
author_facet |
Nævdal, Gunnar Bjerk, Øyvind Holm, Marianne Lerøy, Rita Møller, Dag |
author_sort |
Nævdal, Gunnar |
title |
Growth rate and age at sexual maturity of Atlantic salmon smoltifying aged one and two years |
title_short |
Growth rate and age at sexual maturity of Atlantic salmon smoltifying aged one and two years |
title_full |
Growth rate and age at sexual maturity of Atlantic salmon smoltifying aged one and two years |
title_fullStr |
Growth rate and age at sexual maturity of Atlantic salmon smoltifying aged one and two years |
title_full_unstemmed |
Growth rate and age at sexual maturity of Atlantic salmon smoltifying aged one and two years |
title_sort |
growth rate and age at sexual maturity of atlantic salmon smoltifying aged one and two years |
publisher |
[Fiskeridirektoratets havforskningsinstitutt] |
publishDate |
1979 |
url |
http://hdl.handle.net/11250/114570 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
s. 11-17 |
op_relation |
Fiskeridirektoratets skrifter, Serie Havundersøkelser vol 17 no 1 http://hdl.handle.net/11250/114570 |
_version_ |
1766362807563976704 |