Effects of temperature, hypoxia and activity on the metabolism of juvenile Atlantic cod
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چکیده
Standard metabolic rate (SMR), active metabolic rate (AMR) and critical oxygen saturation (Scrit) were measured in Atlantic cod Gadus morhua at 5, 10 and 15) C. The SMR was 35·5, 57·0 and 78·2 mg O2 kg "1 h and Scrit was 16·5, 23·2 and 30·3%, at 5, 10 and 15) C, respectively. Previously reported SMR for Atlantic cod from arctic waters at 4) C was twice that measured at 5) C in the present study. A possible intraspecific latitudinal difference in the SMR is discussed. The AMR was 146·6, 197·9 and 200·4 mg O2 kg "1 h and the critical swimming speed (Ucrit) was 1·6, 1·7 and 1·9 at 5, 10 and 15) C, respectively. The maximum oxygen consumption was found to be associated with exercise, rather than recovery from exercise as previously reported in another study of cod metabolism.? 1997 The Fisheries Society of the British Isles
منابع مشابه
Preferred temperature of juvenile Atlantic cod Gadus morhua with different haemoglobin genotypes at normoxia and moderate hypoxia.
Atlantic cod Gadus morhua has polymorphic haemoglobin, which can be separated into two homozygous types, HbI-1 and HbI-2, and one heterozygous type HbI-1/2. The geographical distribution of Atlantic cod with the different haemoglobin types varies, with the HbI(2) allele occurring at high frequency in northern regions, and the HbI(1) allele dominant in warmer areas. To determine if temperature i...
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تاریخ انتشار 1997