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- W2308116887 abstract "The net ecological efficiency (yield/assimilated) of a population of Metamysidopsis elongata (Crus tacea, Mysidacea) is estimated to be 32 %. The gross ecological efficiency (yield/ingested) is probably between 19 % and 29 %. Energy use by the field population was calculated from estimates of age specific natural mortality rates and data on growth, molting, reproduction, and respiration. Average growth and molting rates were determined by rearing the mysids in the laboratory. Size specific fecundity was determined from field and laboratory observations. The calorie contents of the mysids, their molts, eggs and larvae were estimated by bomb calorimetry and in part from biochemical composition. The energy used in metabolism was calculated from size specific respiration and data 011 hody composition. Biological systems are organized by the flow of energy. Trophic structure, numbers of steps in food chains, and numbers of conjunctions in food webs depend on the amount of energy passed through populations to other populations. Energy units provide a means of expressing productivity in terms common to all organisms. The energy produced in the breakdown of biomass by organisms is stored as chemical en ergy in the pyrophosphate bonds of adenosine triphosphate (Morowitz, 1968). The overall thermodynamic efTiciency of this process is sim ilar in all animals, about 60 to 70 '/r according to Krebs and Kornberg (1957). It has been suggested (e.g. Slobodkin, 1961, 1962) that the efficiency of energy transfer between popula tions of animals is also fairly constant. This efficiency is necessarily of lower order because, for example, there are losses involved in syn thesizing macromolecules, in continually resyn thesizing proteins that undergo thermal dena turation, in transforming foodstuff energy into work energy (about 65 'If efficiency), and in the degradation of energy during the perform" @default.
- W2308116887 created "2016-06-24" @default.
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- W2308116887 date "1971-01-01" @default.
- W2308116887 modified "2023-09-27" @default.
- W2308116887 title "ECOLOGICAL EFFICIENCY OF A PELAGIC MYSID SHRIMP; ESTIMATES FROM GROWTH, ENERGY BUDGET, AND MORTALITY STUDIES'" @default.
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