Effects of water temperature on protein synthesis and protein growth in juvenile Atlantic wolffish (Anarhichas lupus)

I D McCarthy, E Moksness, D A Pavlov, D F Houlihan

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Abstract

The effects of water temperature (5, 8, 11, and 14 degrees C) on the fractional rate (percent per day) of protein consumption (k(r)) and on white muscle and whole-body fractional rates of protein synthesis (k(s)), protein growth (k(g)), and growth efficiency (PPV, growth/consumption; k(g)/k(s), growth/synthesis) of juvenile Atlantic wolffish (Anarhichas lupus) (initial body weight 26 g) were studied. Rates of protein consumption and white muscle and whole-body protein synthesis increased in a linear fashion between 5 and 14 degrees C. In contrast, the relationships between temperature and white muscle and whole-body protein growth, protein growth efficiency (PPV) and protein synthesis retention efficiency (k(g)/k(s)) were parabolic. The results indicated that the optimum water temperatures for growth (T-opt.G) and growth efficiency (T-opt.GE) were 10-11 and 9-10 degrees C, respectively The maximum white muscle and whole-body protein growth rates recorded at T-opt.G were 0.9 and 0.7 %.day(-1), respectively. At T-opt.GE, the maximum white muscle and whole-body PPV values were 28 and 34%, respectively, and k(g)/k(s) values were 92 and 51%, respectively. The growth performance data for juvenile Atlantic wolffish in comparison with published data for salmonids (rainbow trout (Oncorhynchus mykiss), Atlantic salmon (Salmo salar)) at 9-11 degrees C further highlight its suitability as an alternative species for cold-water aquaculture in northern Europe and Atlantic Canada.

Original languageEnglish
Pages (from-to)231-241
Number of pages11
JournalCanadian Journal of Fisheries and Aquatic Sciences
Volume56
Publication statusPublished - 1999

Keywords

  • TROUT ONCORHYNCHUS-MYKISS
  • GLOBAL WARMING SCENARIO
  • NUCLEIC-ACID CONTENT
  • SALMO-SALAR L
  • RAINBOW-TROUT
  • CYPRINUS-CARPIO
  • SYNTHESIS RATES
  • RATION SIZE
  • EFFICIENCY
  • MUSCLE

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