NAFO posted on October 01, 2003 15:13
Åge Sigurd Hoines and Knut Korsbrekke
Institute of Marine Research, P.O. Box 1870 Nordnes, N-5817 Bergen, Norway
Source - Journal of Northwest Atlantic Fishery Science, Volume 31: 85-97
ISSN-0250-6408
Hoines, Å.S. and K. Korsbrekke. 2003. Population Structure of Greenland Halibut (Reinhardtius hippoglossoides) in the Northeast Arctic, 1992-2000. J. Northw. Atl. Fish. Sci., 31: 85-97. https://doi.org/10.2960/J.v31.a6
Abstract
The variation in population structure of Greenland halibut (Reinhardtius hippoglossoides Walbaum) in the Northeast Arctic is analysed using data from three different surveys using trawl, longline and gillnet gears, in the slope area of the western Barents Sea in the period 1992-2000. The design of the longline and gillnet survey had limitations in that they were set to simulate the commercial fisheries, but the vessels were forced to cover the most important part of the slope area. Greenland halibut was the dominant species both in numbers and weight and was usually caught in the range of 5-15 years old, but the catch was dominated by ages 6-12. The data showed differences in sex composition and age composition both by area and by depth, and catches from trawl showed the most evident pattern. Greenland halibut caught by gillnet were larger and older than fish caught by trawl and the results from longline were in between. In most of the age groups, males were significantly smaller than females and this general trend was shown for all gears. Males also dominated the younger age groups in all gears and Greenland halibut older than 10 years were virtually all females. Fish from the earliest cohorts in the years investigated were generally smaller than fish from later ones.
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Language - English
Publisher - Northwest Atlantic Fisheries Organization (NAFO), Dartmouth, N.S., Canada
Publication Date - 2003
Publication Type - Journal Article
Descriptors - ANOVA, gillnet, Greenland halibut, longline, Northeast Atlantic, trawl
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Citation:
Hoines, Å.S. and K. Korsbrekke. 2003. Population Structure of Greenland Halibut (Reinhardtius hippoglossoides) in the Northeast Arctic, 1992-2000. J. Northw. Atl. Fish. Sci., 31:
85-97. https://doi.org/10.2960/J.v31.a6