期刊
JOURNAL OF SEA RESEARCH
卷 128, 期 -, 页码 41-51出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seares.2017.08.002
关键词
Hemigrapsus takcmoi; Carcinus maenas; Interspecific; Competition; Cohort
Interaction between cohorts was investigated with juveniles of the native crab Carcinus maenas and adults of the exotic crab Hemigrapsus takanoi on artificial, intertidal oyster reefs. The reefs are occupied by C. maenas seasonally as a nursery habitat and consistently by adult H. takanoi. There was a distinct decrease in abundance of C. maenas of the same carapace width as most adult H. takanoi, suggesting competition at this size was occurring. Laboratory experiments indicated that H. takanoi was a more aggressive competitor for food and, with consistently high abundance on the reefs, may result in some exclusion of C. maenas from their nursery habitat. While total exclusion of C. maenas on the oyster reefs is unlikely, cohabitation may result in reduced population size or increased use of alternative nursery habitats.
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