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Food habits and prey size-selection of yellow perch in extreme southern Lake Michigan, with emphasis on the prey : round gobyTruemper, Holly A. January 2003 (has links)
Food habits for yellow perch Perca flavescens were compared using current and previous diet studies from southern Lake Michigan index sites. Yellow perch were not gape limited but size-selective in consumption of the newly established round goby Neogobius melanostomus. Ingested fish ranged from 7 to 47% of the yellow perch's total length and 2 to 53% of their gape. Currently, yellow perch diets are dominated in volume by fish/fish products (85%), which is double from previous studies. Utilization of zooplankton and insect prey items in the yellow perch diet has decreased to <1% by volume in 2002, contrasting with previous consumption of 4 to 20% and 5 to 17%, respectively, from previous studies during 1971-1993. Yellow perch are exhibiting opportunistic, generalist feeding strategy that incorporates both exotic and native prey items, allowing the population to use multiple prey items with the changing prey base in Lake Michigan. / Department of Biology
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Indirect effects of metal-contamination on energetics of yellow perch (Perca flavescens) in Sudbury area lakes, resulting from food web simplificationIles, Alison. January 1900 (has links)
Thesis (M.Sc.). / Written for the Dept. of Biology. Title from title page of PDF (viewed 2008/07/24). Includes bibliographical references.
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The relationship of growth and larval mortality rates to food availability as measured in situ for larval yellow perch (Perca flavescens)Zwanenburg, Kees Cornelis Tieleman. January 1981 (has links)
No description available.
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The relationship of growth and larval mortality rates to food availability as measured in situ for larval yellow perch (Perca flavescens)Zwanenburg, Kees Cornelis Tieleman. January 1981 (has links)
No description available.
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Comparaisons quantitatives concernant la straégie alimentaire des perchaudes (Perca flavescens) dans la rivière des Outaouais et le fleuve Saint-LaurentDeveau, Jean Louis. January 1984 (has links)
No description available.
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Trophic ecology and bioenergetics modeling of Sacramento perch (Archoplites interruptus) in Abbotts Lagoon, Point Reyes National Seashore /Bliesner, Kasey Lauren. January 2005 (has links) (PDF)
Thesis (M.S.)--Humboldt State University, 2005. / Includes bibliographical references (leaves 77-82).
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Comparaisons quantitatives concernant la straégie alimentaire des perchaudes (Perca flavescens) dans la rivière des Outaouais et le fleuve Saint-LaurentDeveau, Jean Louis. January 1984 (has links)
No description available.
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Yellow perch consumption of invasive mussels in the St. Lawrence RiverHarper, Kathryn M. January 2007 (has links)
No description available.
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Yellow perch consumption of invasive mussels in the St. Lawrence RiverHarper, Kathryn M. January 2007 (has links)
Biological invasions are a global phenomenon that can threaten native species and disrupt ecosystem processes. Exotic species also impact ecosystems in less conspicuous ways by provoking native species to alter their foraging behaviour. Subtle impacts such as diet shifts are frequent, and can have consequences for food web dynamics and the fitness of native predators. Diet shifts involving the consumption of exotic species require native predators to recognize, capture and handle novel prey. In this thesis, I document a diet shift in the St. Lawrence River involving a common native fish and Eurasian mussels that invaded the river in the early 1990s. I conducted diet analysis of yellow perch (Perca flavescens) at multiple sites in the upper St. Lawrence River and discovered that they consumed substantial quantities of zebra and quagga mussels (Dreissena spp.) in the Soulanges Canal, an artificial waterway west of Montreal. This was unexpected because perch lack adaptations for crushing molluscs. This foraging innovation was not observed at the same site in the early 1990s or at other sites at any time. Mussel shells were weaker at this site, probably because of exposure to calcium-poor water. This suggests that water chemistry mediates yellow perch predation on mussels. This study provides an example of diet shifts involving exotic prey and illustrates the influence of abiotic factors on species interactions.
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