Maturation in North-East-Arctic Haddock.
Maturation in north-east-arctic haddock was studied in relation to fish age; length, weight and condition factor using data from scientific surveys in 1989-1998. In order to investigate the reliability of the maturity determination undertaken routinely onboard, gonads from 165 female haddock sampled...
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ftimr:oai:imr.brage.unit.no:11250/100419 2023-05-15T14:56:10+02:00 Maturation in North-East-Arctic Haddock. Eikeseth, Helen Nakken, Odd 1999 1364076 bytes application/pdf http://hdl.handle.net/11250/100419 eng eng ICES ICES CM documents 1999/Y:19 This report is not to be quoted without prior consultation with the General Secretary. http://hdl.handle.net/11250/100419 16 s. haddock hyse VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 Working paper 1999 ftimr 2021-09-23T20:15:49Z Maturation in north-east-arctic haddock was studied in relation to fish age; length, weight and condition factor using data from scientific surveys in 1989-1998. In order to investigate the reliability of the maturity determination undertaken routinely onboard, gonads from 165 female haddock sampled during the Barents Sea trawl survey in January-March 1998, were studied in binocular. The size of the oocytes were measured, fitted to a 6-point maturity scale, and compared with the 5-point maturity scale.used. The results showed that the maturity determination of the routine sampling was reliable. Additionally, maturity at length and age was investigated for males and females 'using data from the winter surveys in 1989-1998 by fitting logistic curves. variations in maturity were compared with growth and condition. Males mature at a smaller size and younger age than females. Considerable year to year variations were found in length at 50% maturity in both sexes. Fluctuations in length and age at maturity followed similar trends, suggesting that length, as well as age, determine maturation. Report Arctic Barents Sea Institute for Marine Research: Brage IMR Arctic Barents Sea |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
topic |
haddock hyse VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 |
spellingShingle |
haddock hyse VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 Eikeseth, Helen Nakken, Odd Maturation in North-East-Arctic Haddock. |
topic_facet |
haddock hyse VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921 |
description |
Maturation in north-east-arctic haddock was studied in relation to fish age; length, weight and condition factor using data from scientific surveys in 1989-1998. In order to investigate the reliability of the maturity determination undertaken routinely onboard, gonads from 165 female haddock sampled during the Barents Sea trawl survey in January-March 1998, were studied in binocular. The size of the oocytes were measured, fitted to a 6-point maturity scale, and compared with the 5-point maturity scale.used. The results showed that the maturity determination of the routine sampling was reliable. Additionally, maturity at length and age was investigated for males and females 'using data from the winter surveys in 1989-1998 by fitting logistic curves. variations in maturity were compared with growth and condition. Males mature at a smaller size and younger age than females. Considerable year to year variations were found in length at 50% maturity in both sexes. Fluctuations in length and age at maturity followed similar trends, suggesting that length, as well as age, determine maturation. |
format |
Report |
author |
Eikeseth, Helen Nakken, Odd |
author_facet |
Eikeseth, Helen Nakken, Odd |
author_sort |
Eikeseth, Helen |
title |
Maturation in North-East-Arctic Haddock. |
title_short |
Maturation in North-East-Arctic Haddock. |
title_full |
Maturation in North-East-Arctic Haddock. |
title_fullStr |
Maturation in North-East-Arctic Haddock. |
title_full_unstemmed |
Maturation in North-East-Arctic Haddock. |
title_sort |
maturation in north-east-arctic haddock. |
publisher |
ICES |
publishDate |
1999 |
url |
http://hdl.handle.net/11250/100419 |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic Barents Sea |
genre_facet |
Arctic Barents Sea |
op_source |
16 s. |
op_relation |
ICES CM documents 1999/Y:19 This report is not to be quoted without prior consultation with the General Secretary. http://hdl.handle.net/11250/100419 |
_version_ |
1766328202838409216 |