芦田川河口域の海産魚について

芦田川河ロ域の魚類相を明らかにするために,その河口に設置された2網の桝網の全漁獲物を1971年5月から'72年4月までの1年間,毎月1回調査した.桝網漁獲物中に出現した魚類は28科37種であって,そのうち量的に多い漁獲物は次の二者に大別することができる.(a)ほぼ同年にわたって漁獲され,かつ多数が含まれている種類:コノシロ,サッパ,ヒイラギ,テンジクダイ,マハゼ,(b)ある期間中かなり多量に漁獲され,かつ大部分が未成魚である種類:スズキ,イシモチ,シマフグ,マコガレイ,イシガレイ.

さらに本調査の結果と,芦田川河口に近い笠岡湾の魚類についての1961年の調査結果とを比較検討して考察を行なった.

A study was carried out to clarify the fish-fauna at the estuary of the Asida River in the central part of the Seto Inland Sea. Marine fishes were collected, using of the two masu-ami (a kind of pound net), from the investigated area every month from May, 1971 through April, '72. In this paper, 37 species belonging to 28 families of marine fishes collected in the estuary of the Asida River, are described with their scientific name as well as their Japanese common name, and the season of their appearance in this zone. On the basis of seasonal occurrence and abundance, the fishes caught in great number by the masu-ami can he grouped into the following two categories: (a) Steady year-around "residents" consisting mostly of adult Konosirus punctatus, Harengula zunasi, Leiognathus nuchalis, Apogon lineatus, Acanthogobius flavimanus. (b) Temporary "visitors" mostly immature Lateolabrax japonicus, Argyrosomus argentatus, Fugu xanthopterus, Limanda yokohamae, Kareius bicoloralus.