磯浜潮間帯植食性底生動物のエネルギ-収支〔英文〕

概要

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Energy transformations through the population of rocky intertidal herbivores, Strongylocentrotus intermedius, Chlorostoma argyrostoma turbinatum and Omphalius rusticus, were analyzed from Oct. 1978 to Oct. 1979, using estimates of average weight and numbers of individuals in each size-group and observations on respiratory rates. The energy entering the population, which is the sum of the energy assimilated as food and the rate of immigrants, was 118.4 Kcal m-2 yr-1 for the Strongylocentrotus population, 12.6 Kcal m-2 yr-1 for the Chlorostoma population, and 6.6 Kcal m-2 yr-1 for the Omphalius population. The amount of energy lost from the population, expressed as respiration, gametes ejected, predation, mortality and emigration, was estimated at 119.6, 13.4 and 6.5 Kcal m-2 yr-1 for the Strongylocentrotus, Chlorostoma and Omphalius populations, respectively.
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