Nearshore small fishes of Lake Huron:  Maximizing the detection of species in sampling surveys, demography of an invasive species, round goby, and nest defense of native smallmouth bass against round gobies.
Published: 2007
Language: eng
Number of pages: 179
ISBN-13: 9780494274682
Description: This research is part of the Lake Huron Nearshore Small Fish Community and Exotic Species Assessment. Chapter 1: For twenty fish species of interest, I determined the probabilities of detection ( p) and the proportions of sites occupied (psi) by a binomial-with-added-zeros mixture model and maximum likelihood estimation. Perca flavescens, Notropis hudsonius, Micropterus dolomieu, Sander vitreus, and  Catostomus commersoni had the highest p values.  Chanter 2: In the demographic and life history study of round gobies (Apollonia melanostomus), population densities were 0.88 +/- SE 0.19 m-2. Annual survival rate was between 0.012 and 0.036 for young-of the-year, and 0.0239 for one-year-olds, 0.200 for two-year-olds, and 0 for three-year-olds. Chapter 3: My observations of nest-guarding Micropterus dolomieu support previous findings that round gobies increase the frequency of defensive behaviours. Furthermore, as the round goby population density increased from 0 to 3.96 m-2, the probability of a nest success decreased by 65%.
Notes: Source: Masters Abstracts International, Volume: 45-06, page: 3046.

Thesis (M.Sc.)--University of Toronto, 2007.

Electronic version licensed for access by U. of T. users.

ROBARTS MICROTEXT copy on microfiche.