アユの社会構造の進化史的意義について : 付分布南限における社会構造

概要

論文の詳細を見る
It is common that if food-linked territoriality is self-regulative, aggressive behaviour and spatial requirements should be quite rigid at higher population densities to be effective ; and this appears to be true for most fishes as well as birds, mammals, etc., but the reverse appears to hold for the Ayu-fish. It is assumed, therefore, that the territoriality of the fish might have played an effective part in self-regulation during the glacial ages and be a"relic"type of social structure in the inter-and post-glacial ages. For comfirming the hypothesis, the production rate of algae during the glacial ages was estimated, and the social structure of the fish living in Okinawa Island was examined. The territoriality was much more unstable in the island, the southern end of its distribution, than in the main islands of Japan. Interspecies territory between Ayu-fish and a herbivorous goby (Sicyopterus japonicus) was also investigated in Okinawa, and discussed from the evolutionary point of view.
日本生態学会の論文
1972-06-20