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- Title
Patterns of food and microhabitat resource use by two benthic gobiid fishes.
- Authors
Horinouchi, Masahiro
- Abstract
The mechanisms responsible for different patterns of habitat use by two benthic gobiid fishes, Acentrogobius sp. 1 and A. sp. 2, which displayed identical food use but resided in shallow and deep zones of coarse and fine sediments, respectively, in Lake Hamana, Shizuoka Prefecture, Japan, were investigated by field removal and laboratory sediment-grain size selection experimentation. Following field manipulation, involving removal of both species, the distribution patterns of each were found to be similar in both control and manipulated quadrats, suggesting their differential habitat use patterns may be the outcome not of competition but of differing preferences for habitat characteristics. Results of a sediment-grain size selection experiment in the laboratory suggested a weak preference of A. sp. 2 for fine sediment, while A. sp. 1 showed no grain size preference. The observed difference in the distribution patterns between these two species, therefore, may possibly have resulted from, at least in part, a combination of differences in their preference for sediment grain size and other habitat characteristics such as water depth.
- Subjects
JAPAN; AQUATIC ecology; AQUATIC animals; ECOLOGICAL niche; HABITAT selection; FISH habitats; GROUNDFISHES; GOBIIDAE; ANIMAL-water relationships; LAKES
- Publication
Environmental Biology of Fishes, 2008, Vol 82, Issue 2, p187
- ISSN
0378-1909
- Publication type
Article
- DOI
10.1007/s10641-007-9289-3