発生初期ガザミの酸素消費,成長と食物要求〔英文〕

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Oxygen consumption of the swimming crab reared in the land tank was measured by Winkler method during zoean, megalopa and early crab stages. The crab achieved a constant growth of 36% of its body weight a day. Weight specific respiration decreased with age ranging 3.3-11.0ul O2/mg dry weight/hr at 23°C and 3.7-18.2 at 27°C. Relatively higher rates were observed at the stages of 3rd and 4th zoea and megalopa. These are likely related to a higher mortality during those stages in mass-culture of larva. Food requirement in the state between routine metabolism and active metabolism was calculated from the respiration rate and growth rate under a few physiologi-cal assumptions. The crab requires food amounting to 79-108% of its body weight a day in zoean stages and 60-64% in early crab stages on the basis of carbon. Gross growth efficiency, K1, increased with age ranging from 33 to 60%, saving energy expenditure for respiration and depositing food energy in its body tissue more effectively with development.
日本水産學會の論文