Abstract
Cold-induced growth arrest in gilthead sea bream Sparus aurata: metabolic reorganisation and recovery
Highlights
Fish from temperate latitudes are usually exposed to broad fluctuations in water temperatures
There are currently no standard diets or practices to counteract or ameliorate the growth arrest and extremely poor feed conversion rates (FCR) in gilthead sea bream Sparus aurata caused by low water temperatures
Temperature was gradually reduced from 22° to 14°C over a period of 5 d, and maintained at this low temperature for a further 45 d before gradual recovery over 7 d to 22°C under controlled conditions, avoiding other stressors often present in cage culture conditions
Summary
Fish from temperate latitudes are usually exposed to broad fluctuations in water temperatures. When such variations exceed the thermal tolerance range of the species, the consequences can be highly deleterious or even fatal. The reduced food intake at low temperatures has been observed under laboratory controlled conditions. Natural fasting is common during the cold season for several fish species, this produces economic losses in fish farming. Determining the mechanisms underlying food acceptance and its effects on starved fish could be important in enhancing fish production during the cold season. Growth arrest may persist even after water temperatures start to rise in the spring, as feeding and feed conversion efficiency do not immediately recover in both indoor and culture conditions (reviewed in Ibarz et al 2010a)
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