Control of marine fish production

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18

作者:

LUTHERTM ChurchJR Scudlark

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In the trophic-dynamic hypothesis, biomass production was assumed limited by fac- tors that control energy transfer. An analysis us- ing trophic-dynamic models applied to oceandata, however, leads to a rejection of that hypothesis and supports a hypothesis that carnivorous fish production is controlled by the amount of new N annually incorporated into phytoplankton bio- mass and transferred through food webs. For an average 2.5 trophic transfers from phytoplankton to fish in environments ranging from oceanic to northeast North American coastal waters, N transfer efficiency was a constant 0.28 while C transfer efficiency increased nonlinearly from 0 to an asymptotic value of 0.16. Fish production

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