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Title: マガレイおよびマコガレイの摂餌日周期について
Other Titles: On Diurnal Feeding Periodicity of Two Species of Righteye Flounders, Limanda herzensteini and L. yokohamae
Authors: 高橋, 豊美1 Browse this author
富永, 武治2 Browse this author
前田, 辰昭3 Browse this author
上野, 元一4 Browse this author
Authors(alt): Takahashi, Toyomi1
Tominaga, Takeji2
Maeda, Tatsuaki3
Ueno, Motokazu4
Issue Date: 1982
Publisher: 日本水産学会
Journal Title: 日本水産学会誌
Journal Title(alt): Bulletin of the Japanese Society of Scientific Fisheries
Volume: 48
Issue: 9
Start Page: 1257
End Page: 1264
Publisher DOI: 10.2331/suisan.48.1257
Abstract: In order to elucidate the diurnal feeding periodicity of Limanda herzensteini and L. Yokohamae, fourty-four stomach samples, comprising 2487 specimens, obtained with a trawl net in Mutsu Bay at different times in the day during May 1979 and May and October 1980 were examined. In both species, except for the matured fish of L. yokohamae, in autumn the mean number of main food organisms (Scalibregma inflatum and Paraprionospio sp.) in the stomach and stomach contents weight index (SCI=stomach contents weight×10^2/body weight) increased from about noon to evening, while the ratios of digested contents weight in the stomach (D=digested contents weight×10^2/stomach contents weight) decreased during the afternoon. These results show both species in autumn intook food chiefly from about noon to evening. In spring, however, it was clearly seen that the two peaks of feeding activity took place during forenoon and afternoon. The reason for the difference in diurnal feeding periodicity between seasons was not clear. But it seems likely that the variations in length of daytime and intensity of food requirement in relation to their physiological conditions is the main factor.
1979年5月,1980年5月および10月の各期間に陸奥湾にて胃標本を採集し,マガレイとマコガレイの摂餌日周期を検討した。1) マガレイおよびマコガレイ両種はともに,秋季では摂餌活動が低下していたマコガレイ成熟魚を除き,正午前後から夕刻にかけて主たる摂餌活動が行われていたものと推察された。2) 春季では日出時から日没までの間に2回の摂餌活動のピークが認められ,特にマガレイでは顕著であった。3) 春・秋季間で摂餌日周期が異なるのは食物の消化時間および消化管内移動速度のためではなく,生活年周期に関連した餌料に対する生理的要求の度合および日照時間の長さの違いによる可能性が強い。
Rights: © 1982 公益社団法人日本水産学会
© 1982 The Japanese Society of Fisheries Science
Type: article
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 高橋 豊美

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