Effect of food quality on energy uptake |
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| Authors: | Jeffrey S Ren |
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| Institution: | aNational Institute of Water and Atmospheric Research, PO Box 8602, Christchurch, New Zealand |
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| Abstract: | The dynamic energy budget (DEB) theory assumes that the feeding of an organism in relation to food density follows the type-II functional response when food consists of purely digestible organic matter. However when faced with a food source high in inorganic content, an organism needs to adapt physiologically to maximise organic extraction. Indeed filter-feeding marine bivalves inhabiting turbid coastal waters cope with large fluctuations in food quality by selectively ingesting and pseudofaeces production. Data from feeding experiments with the New Zealand greenshell mussel Perna canaliculus have demonstrated that inorganic particles contribute some uncertainty to the estimate of the half-saturation coefficient. Incorporating inorganic matter into the functional response would improve the prediction of energy uptake. |
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| Keywords: | Food Quality Inorganic Content Functional Response Perna |
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