2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/23/2019 | 11:45 AM - 12:00 PM | STAGE-STRUCTURED PREDATION BY FISH IN LINKED AQUATIC-TERRESTRIAL FOOD WEBS: A MESOCOSM EXPERIMENT | 250 DE
STAGE-STRUCTURED PREDATION BY FISH IN LINKED AQUATIC-TERRESTRIAL FOOD WEBS: A MESOCOSM EXPERIMENT
Stage-structured feeding within food web models can alter predictions about predator-prey interactions because 1) susceptibility to predation varies across life-stages and 2) trophic ecology varies across life-stages. The life-cycles of prey species can influence their availability to predators, altering nutrient flow in a system. In this study, we used mesocosms to determine the effects of stage structuring within the diets of Common Carp (Cyprinus carpio, a benthic feeder) and Spotfin Shiner (Cyprinella spiloptera, a water column feeder). We show that stage-structured feeding was present within this system (spotfin at a higher proportion of pupal prey than carp) and that the difference in stage-structured feeding was greatest during peak insect emergence events. This study demonstrates the presence of stage-structuring in the diets of Missouri River fishes and leads to different predictions of how these fishes impact insects in their larval stages (strong, direct effects of carp but not spotfin) versus emerging adult stages (strong effects of both fishes).
- Diet
- Fish
- Aquatic-terrestrial Linkage
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Presenters/Authors
Abraham Kanz
(), University of South Dakota, Abrahamkanz@gmail.com;
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Jeff Wesner
(), University of South Dakota, Jeff.Wesner@usd.edu;
ASHA DISCLOSURE:
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Nonfinancial -