Temporal and geographic variation in maturity at length and age of Greenland halibut (Reinhardtius hippoglossoides) from the Canadian north-west Atlantic with implications for fisheries management
Maturity at size and age of Greenland halibut in the Canadian north-west Atlantic were investigated using three separate data sources: (1) Canadian fall research vessel surveys from 1978 to 1994 in NAFO Div. 2J and 3K; (2) Canadian deep water surveys in NAFO Div. 3K, 3L and 3M in 1991, 1994 and 1995...
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fthighwire:oai:open-archive.highwire.org:icesjms:54/5/875 2023-05-15T16:27:18+02:00 Temporal and geographic variation in maturity at length and age of Greenland halibut (Reinhardtius hippoglossoides) from the Canadian north-west Atlantic with implications for fisheries management Morgan, M. J. Bowering, W. R. 1997-10-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/54/5/875 https://doi.org/10.1006/jmsc.1996.0200 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/54/5/875 http://dx.doi.org/10.1006/jmsc.1996.0200 Copyright (C) 1997, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Articles TEXT 1997 fthighwire https://doi.org/10.1006/jmsc.1996.0200 2013-05-27T06:34:15Z Maturity at size and age of Greenland halibut in the Canadian north-west Atlantic were investigated using three separate data sources: (1) Canadian fall research vessel surveys from 1978 to 1994 in NAFO Div. 2J and 3K; (2) Canadian deep water surveys in NAFO Div. 3K, 3L and 3M in 1991, 1994 and 1995; and (3) Canadian commercial deep water gillnet fishery in 1993 and 1994 in Div. 0B, 2G, 2H, 3K and 3L. Estimated proportion of fish mature in each length group showed large spatial and temporal variability from all data sources. Proportions mature at age (only available from the Canadian deepwater surveys) also exhibited inconsistency with the age at 50% maturity ranging from 9.5 to 15.0 years for females and from 8.2 to 11.6 for males. There were no apparent trends in this variation, which may be a result of irregularities in the maturation process and spawning of Greenland halibut, leading to variability in the distribution of adult fish. The inavailability of precise estimates of maturity at age and size will make the measurement of the effect of fishing practices on spawning stock biomass and yield per recruit and/or advice on minimum fish size to protect juveniles extremely difficult. A synoptic survey of the entire stock area may be the only way to obtain an accurate reflection of the maturity schedule of the population. Text Greenland North West Atlantic HighWire Press (Stanford University) Greenland ICES Journal of Marine Science 54 5 875 885 |
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HighWire Press (Stanford University) |
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English |
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Articles |
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Articles Morgan, M. J. Bowering, W. R. Temporal and geographic variation in maturity at length and age of Greenland halibut (Reinhardtius hippoglossoides) from the Canadian north-west Atlantic with implications for fisheries management |
topic_facet |
Articles |
description |
Maturity at size and age of Greenland halibut in the Canadian north-west Atlantic were investigated using three separate data sources: (1) Canadian fall research vessel surveys from 1978 to 1994 in NAFO Div. 2J and 3K; (2) Canadian deep water surveys in NAFO Div. 3K, 3L and 3M in 1991, 1994 and 1995; and (3) Canadian commercial deep water gillnet fishery in 1993 and 1994 in Div. 0B, 2G, 2H, 3K and 3L. Estimated proportion of fish mature in each length group showed large spatial and temporal variability from all data sources. Proportions mature at age (only available from the Canadian deepwater surveys) also exhibited inconsistency with the age at 50% maturity ranging from 9.5 to 15.0 years for females and from 8.2 to 11.6 for males. There were no apparent trends in this variation, which may be a result of irregularities in the maturation process and spawning of Greenland halibut, leading to variability in the distribution of adult fish. The inavailability of precise estimates of maturity at age and size will make the measurement of the effect of fishing practices on spawning stock biomass and yield per recruit and/or advice on minimum fish size to protect juveniles extremely difficult. A synoptic survey of the entire stock area may be the only way to obtain an accurate reflection of the maturity schedule of the population. |
format |
Text |
author |
Morgan, M. J. Bowering, W. R. |
author_facet |
Morgan, M. J. Bowering, W. R. |
author_sort |
Morgan, M. J. |
title |
Temporal and geographic variation in maturity at length and age of Greenland halibut (Reinhardtius hippoglossoides) from the Canadian north-west Atlantic with implications for fisheries management |
title_short |
Temporal and geographic variation in maturity at length and age of Greenland halibut (Reinhardtius hippoglossoides) from the Canadian north-west Atlantic with implications for fisheries management |
title_full |
Temporal and geographic variation in maturity at length and age of Greenland halibut (Reinhardtius hippoglossoides) from the Canadian north-west Atlantic with implications for fisheries management |
title_fullStr |
Temporal and geographic variation in maturity at length and age of Greenland halibut (Reinhardtius hippoglossoides) from the Canadian north-west Atlantic with implications for fisheries management |
title_full_unstemmed |
Temporal and geographic variation in maturity at length and age of Greenland halibut (Reinhardtius hippoglossoides) from the Canadian north-west Atlantic with implications for fisheries management |
title_sort |
temporal and geographic variation in maturity at length and age of greenland halibut (reinhardtius hippoglossoides) from the canadian north-west atlantic with implications for fisheries management |
publisher |
Oxford University Press |
publishDate |
1997 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/54/5/875 https://doi.org/10.1006/jmsc.1996.0200 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North West Atlantic |
genre_facet |
Greenland North West Atlantic |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/54/5/875 http://dx.doi.org/10.1006/jmsc.1996.0200 |
op_rights |
Copyright (C) 1997, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1006/jmsc.1996.0200 |
container_title |
ICES Journal of Marine Science |
container_volume |
54 |
container_issue |
5 |
container_start_page |
875 |
op_container_end_page |
885 |
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1766016428512641024 |