Competition between two congeneric stream gobies for habitat in southwestern Shikoku, Japan |
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Authors: | Shin Sone Mikio Inoue Yasunobu Yanagisawa |
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Affiliation: | (1) Department of Biology, Faculty of Science, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan;(2) Present address: Matsuyama-minami High School, 11-1 Suehiro-cho, Matsuyama 790-8506, Japan |
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Abstract: | Competition between two congeneric gobies, Rhinogobius sp. LD (large-dark type) and CB (cross-band type), for habitat was studied in a tributary of the Shimanto River, southwestern Shikoku, Japan. Habitat use by CB, measured by water depth, current velocity, and substrate, was compared between before and after the removal of LD. After the removal of LD, CB shifted their habitat use to coarser substrates than previously, suggesting a release from effects of LD. This result supports a hypothesis from our previous study that habitat partitioning between CB and LD is a consequence of interference effects of LD on CB. |
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Keywords: | Interspecific competition Resource partitioning Habitat use Removal experiment Rhinogobius |
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