The widespread introduction of round goby (Neogobius melanostomus ) throughout the Great Lakes basin has raised concerns regarding increased risk of egg predation on nesting fish species. Five-minute observation trials were conducted to determine the identity and number of nest predators on rock bass (Ambloplites rupestris), pumpkinseed (Lepomis gibbosus), and smallmouth bass (Micropterus dolomieu) nests following removal of the guarding male. Rock bass had a greater proportion of nests invaded (85.4 %) and average number of predators per nest (9.32, SE 1.7) than pumpkinseed (45.0%, 1.83, SE 0.64) in 2011. Similarly, rock bass had a greater proportion of nests invaded (52.5%) and average number of predators per nest (5.3, SE 1.7) than pumpkinseed (35.0%, 2.3, SE 1.1) and smallmouth bass (37.5%, 2.7, SE 0.94) in 2012. Principal components analysis and canonical correspondence analysis of habitat variables indicates some species are more vulnerable to nest predation due to preferred spawning habitat.
|Advisor:||Farrell, John M.|
|Commitee:||Daley, Douglas, Kapuscinski, Kevin L., Underwood, H. Brian|
|School:||State University of New York College of Environmental Science and Forestry|
|Department:||Environmental and Forest Biology|
|School Location:||United States -- New York|
|Source:||MAI 52/01M(E), Masters Abstracts International|
|Subjects:||Ecology, Zoology, Aquatic sciences|
|Keywords:||Egg predation, Habitat, Neogobius melanostomus, Pumpkinseed, Rock bass, Round goby, Smallmouth bass|
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