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Distribution of Phycis chesteri (Pisces: Gadidae) on the Grand Bank and Labrador Shelf

David A. Methven and D. Scott McKelvie
Copeia
Vol. 1986, No. 4 (Dec. 23, 1986), pp. 886-891
DOI: 10.2307/1445284
Stable URL: http://www.jstor.org/stable/1445284
Page Count: 6
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Distribution of Phycis chesteri (Pisces: Gadidae) on the Grand Bank and Labrador Shelf
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Abstract

The known northern limit of demersal Phycis chesteri is extended 1100 km from the southern edge of the Laurentian Channel to the mid-Labrador Shelf (56°11′N). P. chesteri was most abundant between 300-450 m in temperatures of 3.5-6.5 C and showed crepuscular peaks of abundance with 87.7% caught between 1800-0800 h. The occurrence of P. chesteri in a deep fjord on the south coast of Newfoundland suggests that local populations may survive nearshore. Adults spawn in Oct., based upon an estimated growth rate of 6.5 mm per month for larvae and pelagic juveniles. Demersal and pelagic stages of P. chesteri were primarily distributed along the edge of the continental shelf. Female P. chesteri were generally larger (mean = 239 mm Standard Length, [SL]) and more abundant than males (mean = 188 mm SL; sex ratio, 1M:3.33F). All males and most females were immature. Only 28% of the stomachs examined contained food; only crustaceans were consumed.

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