Response of the tench (Tinca tinca L.) to potassium nitrate enriched water |
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Authors: | A. Demaë l,,D. Garin, G. Peres |
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Affiliation: | Laboratoire de Physiologie générale et comparée, UniversitéClaude Bernard, Lyon I, Villeurbanne, France |
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Abstract: | When the tench ( Tinca tinca L.) was exposed to a slight increase, 8.5 mg/l, in the potassium content of the water, metabolic and hormonal changes occurred which lasted more than four weeks. An initial phase of lipolysis was followed by a partial consumption of glycogen reserves, which in turn was followed by a phase of gluconeogenesis. Hyperglycaemia persisted throughout the experiment. The ion distribution in erythrocytes and liver changed relatively early; there was no observable change in water content. These changes are similar to those observed during the osmoregulation of fish. |
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