Growth, diet and metabolism of common wolf-fish in the North Sea, a fast-growing population

Liao, YY; Lucas, MC

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.

Citation

Liao, Y., & Lucas, M. (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

• Journal Article Type: Article
• Publication Date: 2000-04
• Journal: Journal of Fish Biology
• Print ISSN: 0022-1112
• Electronic ISSN: 1095-8649
• Publisher: Wiley
• Volume: 56
• Issue: 4
• Pages: 810-825
• 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
• Public URL: https://durham-repository.worktribe.com/output/1581573