Population ecology of Japanese sandeel [genus Ammodytes]
1991
Hashimoto, H. (Hiroshima Univ., Fukuyama (Japan). Faculty of Applied Biological Science)
A number of supbopulations of sandeels occur around Japan, each being relatively independent and undergoing local migration only. At least two species are involved, according to literature sources, Ammodytes hexapterus and A. personatus, which coexist in coastal waters off northern Hokkaido. A. personatus also occur in Sendai Bay, where the "species" comprises two distinct forms. Because identification of species or lower taxa of sandeels is difficult from external appearance, it is desirable that the population structure of Japanese sandeels is made clear. Although sandeels are commercially important, fluctuations in catch are short-spaced and unstable. The present study was intended mainly to clarify the population structure of sandeels around Japan. Some factors influencing mechanisms of population fluctuations have also been investigated
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