Modeling feeding processes: A test of a new model for sea bream (Sparus aurata) larvae

TitleModeling feeding processes: A test of a new model for sea bream (Sparus aurata) larvae
Publication TypeJournal Article
Year of Publication2005
AuthorsLika, K, Papandroulakis N
JournalCanadian Journal of Fisheries and Aquatic Sciences
Pages425 - 435

An organism's feeding rate is governed by constraints imposed by processes associated with consumption. We present a general feeding model that incorporates encounter, successful pursuit, handling, and digestion in one functional representation where we treat digestion as a parallel process. The model produces type II functional response curves. However, the asymptotic maximum feeding rate is determined by the sum of the time spent for handling and digesting a prey minus the gain in time, since the digestion process is parallel to the handling process. We use our model in combination with existing models of encounter, successful pursuit, and digestion to evaluate the feeding rate of fish larvae. We test the model against experimental data for sea bream (Sparus aurata) larvae and find a very close quantitative correspondence between predictions and experiments. Sensitivity analysis shows that for the early developmental stages, the model is sensitive to parameters related to the visual and locomotion abilities of larvae to detect and capture the prey. Later, when they establish these abilities, the choice of accepting or not the prey becomes more important. © 2005 NRC Canada.


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