STUDIES ON THE SMALL COASTAL GILL-NET FISHERIES AND THEIR RESOURCES-IV:FISH POPULATION CAUGHT BY THE BOTTOM GILL-NET

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概要

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• In the present paper, the author analysed ecologically the fish population taken by the bottom gill-net in the coastal water of Tomioka during the four years from 1956 to 1959. The results obtained from this study are as follows: The inner bay is for the nursery ground, and the fish population there consists mainly of the smaller fishes (young) than those of the other fishing grounds. But the fish populations in the outer bay and open sea consist of the large-size (adult), and most of them are relatively similar in their length composition each other, and have a tendency to migrate actively between each grounds (Fig. 1). Even the unit catch per ten nets on the spiny lobster, Panulirus japonicus or file-fish, Stephanolepis cirrhifer is less than 3 in number, and the coefficient of its variation is comparatively large. In, other words, the net is not used selectively for taking dense or large schools. These facts demonstrate the characteristics of this net (Figs. 2 and 3). Further, the gill-net is used almost for the spawners and feeders from spring to autumn, specially for the spawners from spring to summer (Fig. 4).

• 社団法人 日本水産学会の論文

著者

• 塩川 司

  九州大学理学部付属天草臨海実験所

関連論文

• 沿岸における小型刺網漁業とその資源-V : 磯建網漁業の解析と総括
• 沿岸における小型刺網漁業とその資源-II : 磯建網漁業の漁場の特性について
• 沿岸における小型刺網漁業とその資源-I : とびうお流網漁業
• STUDIES ON THE SMALL COASTAL GILL-NET FISHERIES AND THEIR RESOURCES-IV:FISH POPULATION CAUGHT BY THE BOTTOM GILL-NET
• STUDIES ON THE SMALL COASTAL GILL-NET FISHERIES AND THEIR RESOURCES-III:CATCH AND CHARACTERISTICS OF THE FISHING GEAR ON THE BOTTOM GILL-NET FISHERY

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