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JNAFS

18

Douglas B. Sigourney and Michael R. Ross

Department of Natural Resources Conservation, University of Massachusetts
Holdsworth Hall, Amherst, MA 01003, USA

Jon Brodziak and Jay Burnett

National Marine Fisheries Service, Northeast Fisheries Science Center
166 Water Street, Woods Hole, MA 02543, USA

 

Publication (Upload) date: 18 Apr 2006

 

SIGOURNEY, D. B., M. R. ROSS, J. BRODZIAK, and J. BURNETT. 2006. Length at age, sexual maturity and distribution of Atlantic halibut, Hippoglossus hippoglossus L., off the Northeast USA. J. Northw. Atl. Fish. Sci., 36: 81–90. https://doi.org/10.2960/J.v36.m574

 

Abstract

This paper presents first estimates of length at age, size and age at sexual maturity, and depth distributions of Atlantic halibut (Hippoglossus hippoglossus L.) off the Northeast USA. The estimates are based on samples collected from spring and autumn bottom trawl surveys in the Gulf of Maine-Georges Bank region (1976–2000) and an experimental longline fishery off the coast of Maine (2000–2001). Longlines targeted larger, faster growing fish than a bottom trawl indicating gear selectivity. Sexual dimorphism in growth was apparent with females attaining greater sizes after age 4. Median age at maturity was estimated to be 6.0 years for males and 7.3 years for females. Adult halibut (>80 cm) occurred at greater average depths than juveniles (<40 cm), but mean depth of capture differed among seasons for all size-classes of halibut. The results suggest that halibut from the Gulf of Maine-Georges Bank region grow faster than those from the Newfoundland-Labrador region. Median ages at maturity of male and female halibut were lower than in other regions of the Northwest Atlantic; however, lengths at maturity were similar.

Key words: Age at maturity, Atlantic halibut, distribution, growth

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Citation: SIGOURNEY, D. B., M. R. ROSS, J. BRODZIAK, and J. BURNETT. 2006. Length at age, sexual maturity and distribution of Atlantic halibut, Hippoglossus hippoglossus L., off the Northeast USA. J. Northw. Atl. Fish. Sci., 36: 81–90. https://doi.org/10.2960/J.v36.m574
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