A QUANTITATIVE STUDY OF A CERASTODERMA -- NEPHTHYS COMMUNITY IN THE LIMFJORD, DENMARK, WITH SPECIAL REFERENCE TO PRODUCTION OF CERASTODERMA EDULE |
| |
Authors: | IVELL RICHARD |
| |
Affiliation: | Institute of Ecology and Genetics, Aarhus University Denmark |
| |
Abstract: | Cerastoderma edule is the dominant member of a non-random CerastodermaNephthyscommunity, occupying a physically, homogeneous, submerged sandbankin the Limfjord, Denmark. C. edule is patchily distributed withinthis community, growth rates showing a clear density-dependence.Individual production is about 35%lower in high density patchesthan outside them; at low density annual individual flesh dryweight increment is 295 mg. Seasonal variation in water, ash,lipid, protein and glycogen contents is studied, and a sizedependent(= density-dependent) relationship is shown to exist for someparameters. Population production, estimated by a new graphicalmethod, and taking into account gametic and shell protein production,attains 150 g dry flesh weight, m2.yr1 at meanpopulation density rising to 250 g dry flesh weight. m2.yr1in the high density patches. 1Present address: Institut für Physiologische Chemie, Abt.Zellbiochemie, Universitat Hamburg, Martinistrasse 52, 2000Hamburg 20 (Received 10 March 1980; |
| |
Keywords: | |
本文献已被 Oxford 等数据库收录! |
|