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Model analysis of the effect of environmental fluctuation on the species replacement pattern of pelagic fishes under interspecific competition
Author(s) -
Matsuda Hiroyuki,
Wada Tokio,
Takeuchi Yasuhiro,
Matsumiya Yoshiharu
Publication year - 1992
Publication title -
population ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 59
eISSN - 1438-390X
pISSN - 1438-3896
DOI - 10.1007/bf02514800
Subject(s) - interspecific competition , pelagic zone , sardine , biology , competition (biology) , intraspecific competition , storage effect , ecology , abundance (ecology) , mackerel , fishery , fish <actinopterygii>
Summary There are two factors affecting long‐term fluctuation of planktotrophic pelagic fish: environmental fluctuation and interspecific competition. Long‐term catch data of planktotrophic pelagic fishes in Japan suggest that the chub mackerel (species B) was replaced by the sardine (A), A was replaced by the anchovy, Pacific saury and horse mackerel (Group C), and species in group C were replaced by species B. If species A defeats B, B defeats C, and C defeats A in interspecific competitive ability, then the abundance of these three groups fluctuate forever and dominate in the same order. We call this cyclic advantage hypothesis for species replacement. In this model, environmental fluctuation affects the species replacement as a trigger. Environmental fluctuation does not determine the next dominant species but greatly affects when the next replacement occurs.