Title page for ETD etd-1113101-171156

Type of Document Master's Thesis
Author McRae, Mark G.
Author's Email Address mmcrae@lsu.edu
URN etd-1113101-171156
Title Microhabitat Use in an Assemblage of Native and Introduced Stream Fishes in Wailoa Stream, Island of Hawaii
Degree Master of Science (M.S.)
Department Zoology (Biological Sciences)
Advisory Committee
Advisor Name Title
J. Michael Fitzsimons Committee Chair
C. Frederick Bryan Committee Member
Donald M. Baltz Committee Member
E. Barry Moser Committee Member
  • stream fishes
  • community structure
  • microhabitat
  • poeciliid
  • gobies
  • Hawaii
Date of Defense 2001-10-31
Availability unrestricted
To date, most research on the ecology of Hawaiian stream fishes has taken place in the middle and upper reaches of streams. In the terminal reaches of streams in Hawaii, the ecological aspects of the relatively more diverse fish assemblages are largely unknown. This study investigated patterns of microhabitat use in an assemblage of native and introduced stream fishes living in the terminal reach of Wailoa Stream on the Island of Hawaii. Multivariate and univariate analyses of microhabitat data collected through underwater visual surveys indicated that differences in microhabitat preferences were an important factor in the structure of this assemblage. Strong differences in three-dimensional microhabitat use patterns appear to allow native gobioids and introduced poeciliids to coexist in Wailoa Stream with little competition for spatial resources. However, high overlap in the microhabitat use patterns of juvenile Kuhlia xenura and introduced Poecilia mexicana and Xiphophorus helleri is cause for concern.
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