広島大学大学院教育学研究科紀要. 第二部, 文化教育開発関連領域 59号
2010-12-24 発行

五島列島中通島におけるオオクチバスの生態学的研究

Ecological Studies of Largemouth Bass (Micropterus salmoides) in Nakadoorijima, Goto islands, Nagasaki Pref.
鳥越 兼治
白岩 豊和
本文ファイル
抄録
This paper reports the results of research on largemouth bass living in the Aokata Dam on Nakadoorijima of the Goto Islands in Nagasaki Prefecture. The breeding season was found to be from April to May. The bass prey on the arthropod Asellus hilgendorfii, about 1 cm in the total length, as their main food source independent of bass size (length) and season. This appears to be a result of the scarcity of food for bass in the Aokata Dam. Sexual maturity in bass from this population appeared to be achieved at 4 to 5 years of age as determined by GSI and otolith age assessment. This result showed that the growth of the Aokata Dam bass was very slow compared with that seen in previous work on largemouth bass.
キーワード
Nakadoorijima
largemouth bass
ecology
五島列島中通島
オオクチバス, 生態
SelfDOI