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Environmental biology of European cyprinids: Papers from the by Wolfgang Wieser (auth.), Wolfgang Wieser, Fritz Schiemer, PDF

By Wolfgang Wieser (auth.), Wolfgang Wieser, Fritz Schiemer, Alfred Goldschmidt, Kurt Kotrschal (eds.)

ISBN-10: 9401051232

ISBN-13: 9789401051231

ISBN-10: 9401125449

ISBN-13: 9789401125444

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Read or Download Environmental biology of European cyprinids: Papers from the workshop on ‘The Environmental Biology of Cyprinids’ held at the University of Salzburg, Austria, in September 1989 PDF

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Extra info for Environmental biology of European cyprinids: Papers from the workshop on ‘The Environmental Biology of Cyprinids’ held at the University of Salzburg, Austria, in September 1989

Sample text

Schiemer. 1989. Prey detection in cyprinids during early development. Can. J. Fish. Aquat. Sci. 46: 995-1001. M. 1975a. Growth, metabolism, and optimal swimming speed of a pelagic fish. J. Fish. Res. Board Can. 32: 33-41. M. 1975b. Relation between egg size, growth and natural mortality of larval fish. J. Fish. Res. Board Can. 32: 2503-2512. M. 1978. Bioenergetics of pelagic fish: theoretical change in swimming speed and ration with body size. J. Fish. Res. Board Can. 35: 220-228. E. E. Davis. 1967.

This analysis also showed that this result is due to differences between roach and all other species. grounds. According to earlier results (see Uiblein 1991), the present data suggest that the four tested species choose undirected sampling methods based upon external information on prey visibility and internal expectations of long-term benefits gained from sampling. Interspecific qualitative differences occurred during both experimental series. Vimba and bream showed a higher percentage of undirected snaps than Danubian bleak in the second experiment with novel prey.

Ballerus R. 98 169 57 161 Feeding experiments: Species Food level Range (mm) loglO a ± CL b± CL r2 n A. 96 15 15 10 10 25 25 25 A. ballerus R. rutilus of C. reticulata and D. magna (Table 1b). Mean individual daily consumption rates (C) were estimated by counting the zooplankton in the experimental tanks after 24 h feeding period, thus c= (amount of food offered) - (remaining amount after 24 h) number of fish per tank. Growth during the feeding experiments was determined by measuring total length from photographs taken every third day and estimating body mass using a length-weight relationship calculated from mass cultures (Table 2).

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Environmental biology of European cyprinids: Papers from the workshop on ‘The Environmental Biology of Cyprinids’ held at the University of Salzburg, Austria, in September 1989 by Wolfgang Wieser (auth.), Wolfgang Wieser, Fritz Schiemer, Alfred Goldschmidt, Kurt Kotrschal (eds.)


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