期刊
JOURNAL OF FISH BIOLOGY
卷 85, 期 2, 页码 264-277出版社
WILEY
DOI: 10.1111/jfb.12416
关键词
compensatory feeding; food web; growth; prey quality; prey quantity
资金
- National Science Foundation
- Florida International University UGS Dissertation Year Fellowship
- National Science Foundation Grant OCE [0746164]
- Loxahatchee River District
- Directorate For Geosciences
- Division Of Ocean Sciences [0746164] Funding Source: National Science Foundation
This study examined diet, prey quality and growth for a generalist fish predator, grey snapper Lutjanus griseus, at five sites across an estuarine gradient in the Loxahatchee River estuary, Florida, U.S.A. Lutjanus griseus diets shifted from dominance by low quality, intertidal crabs upstream to an increased reliance on higher quality shrimp, fishes and benthic crabs downstream. Frequency of L. griseus with empty stomachs was higher at downstream sites. Lutjanus griseus growth rates did not vary among sites. Results indicate that L. griseus may be able to compensate for lower quality prey upstream by consuming more, and thus individuals are able to maintain similar levels of energy balance and growth rates across the estuarine gradient. Elucidating mechanisms, such as compensatory feeding, that enable generalist species to remain successful across habitat conditions are critical to understanding their organismal ecology and may facilitate predictions about the response of generalists to landscape alteration. (C) 2014 The Fisheries Society of the British Isles
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