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Stable isotopes and cellulase activity as evidence for detritus as a food source for juvenile Gulf menhaden |
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| Authors: | Linda A Deegan Bruce J Peterson Ralph Portier |
| Institution: | 1. Department of Forestry and Wildlife Management, University of Massachusetts, 01003, Amherst, Massachusetts 2. Marine Biological Laboratory, The Ecosystems Center, 02543, Woods Hole, Massachusetts 3. Center for Wetlands Resources, Louisiana State University, 70803, Baton Rouge, Louisiana |
| Abstract: | Menhaden are one of the most abundant components of fish communities in Gulf and Atlantic estuaries. Juvenile menhaden have been reported to have zooplankton, phytoplankton, andSpartina-derived detritus in their guts. However, there has been disagreement over the importance of the detritus as a food source. We show, using physiological and stable isotope evidence, that detritus can be used by juvenile Gulf menhaden. Their diet is very roughly 30% detritus- and 70% plankton-based. |
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