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Durham University

Department of Biosciences

Academic Staff

Publication details for Dr Martyn Lucas

Liao, YY & Lucas, MC (2000). Growth, diet and metabolism of common wolf-fish in the North Sea, a fast-growing population. Journal of Fish Biology 56(4): 810-825.
  • Publication type: Journal Article
  • ISSN/ISBN: 0022-1112
  • Keywords: Anarhichas lupus; growth; metabolic scope; diet; North SeaPLAICE PLEURONECTES-PLATESSA; ANARHICHAS-LUPUS L; COD GADUS-MORHUA;LONG-TERM; ATLANTIC COD; TEMPERATURE; SELECTION; TRENDS; SCOPE

Author(s) from Durham

Abstract

The von Bertalanffy growth parameters for common wolf-fish Anarhichas
lupus in the North Sea were: male: L-infinity = 111.2 cm, t(0) = -0.43
and K = 0.12; and female: L-infinity = 115.1 cm, t(0) = -0.39 and K =
0.11, making this the fastest growing stock reported. Resting metabolic
rates (RMR +/- S.E.) and maximum metabolic rates (MMR +/- S.E.) for six
adult common wolf-fish (mean weight, 1.39 kg) at 5 degrees C were 12.18
+/- 1.6 mg O-2 kg(-1) h(-1) and 70.65 +/- 7.63 mg O-2 kg(-1) h(-1)
respectively, and at 10 degrees C were 25.43 +/- 1.31 mg O-2 kg(-1)
h(-1) and 113.84 +/- 16.26 mg O-2 kg(-1) h(-1) Absolute metabolic scope
was 53% greater at 10 degrees C than at 5 degrees C. The diet was
dominated by Decapoda (39% overall by relative occurrence), Bivalvia
(20%) and Gastropoda (12%). Sea urchins, typically of low energy value,
occupied only 7% of the diet. The fast growth probably resulted from
summer temperatures approximating. to the optimum for food processing
and growth, but may have been influenced by diet, and reduced
competition following high fishing intensity. (C) 2000 The Fisheries
Society or the British Isles.