The relationship between feeding preferences and consumption rates in grass carp and grass carp x bighead carp hybrids

Autor:	M. J. Wiley, L. D. Wike, S. M. Pescitelli
Rok vydání:	1986
Předmět:	Consumption (economics) Ecology food and beverages Aquatic Science Biology biology.organism_classification Bighead carp Food preference Grass carp Protein content Animal science Plant species sense organs Water content Ecology Evolution Behavior and Systematics Hybrid
Zdroj:	Journal of Fish Biology. 29:507-514
ISSN:	1095-8649 0022-1112
DOI:	10.1111/j.1095-8649.1986.tb04966.x
Popis:	The relationship between food preference hierarchy and consumption rate was examined for the grass carp, Cfrnopharygodon idella, and its F1 hybrid (grass carp x bighead carp). Preferences of both types of fish were similar, although hybrids consumed vegetation at a much lower rate. For both, relative preference in feeding trials with mixed plant species was significantly correlated with consumption rate in monospecific feeding experiments. No correlations were found between preference and caloric content, protein content or relative water content. The hypothesis is proposed that preference hierarchies reflect relative handling times of different food types and that these fish maximize ‘ through-put ’ by preferentially consuming plant species which can be most rapidly ingested.
Databáze:	OpenAIRE
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