Observations on the nocturnal activity and feeding behavior of Anguilla japonica glass eels under laboratory conditions

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	Observations on the nocturnal activity and feeding behavior of Anguilla japonica glass eels under laboratory conditions
	Dou, SZ ; Tsukamoto, K
刊名	ENVIRONMENTAL BIOLOGY OF FISHES
	2003-08-01
卷号	67 期号:4 页码:389-395
关键词	Burying Rhythm Feeding Habit Japanese Eel Shelter Preference Light Regime Lunar Cycles
ISSN号	0378-1909
文献子类	Article
英文摘要	Glass eels of the temperate anguillid species, Anguilla japonica, clearly showed a nocturnal activity rhythm under laboratory conditions. Light-dark cycle was a determinant factor affecting their photonegative behavior, nocturnal locomotor activity, and feeding behavior. Under natural light conditions, glass eels remained in shelters with little daytime feeding, but came out to forage during darkness. They moved and foraged actively in the following dark, and then their activity gradually declined possibly because of food satiation. They finally buried in the sand or stayed in tubes immediately after the lights came on. Under constant light, glass eels often came out of the shelters to forage in the lights but spent little time moving outside the shelters (e.g. swimming or crawling on the sand). Glass eels took shelter to avoid light and preferred tubes to sand for shelter possibly because tubes were much easier for them to take refuge in than sand. Feeding and locomotor activities of the glass eels were nocturnal and well synchronized. They appeared to depend on olfaction rather than vision to detect and capture prey in darkness. Feeding was the driving force for glass eels to come out of sand under constant light. However, in the dark, some glass eels swam or crept actively on sand even when they were fully fed. The lunar cycles of activity rhythms of glass eels that have been observed in some estuarine areas were not detected under these laboratory conditions.; Glass eels of the temperate anguillid species, Anguilla japonica, clearly showed a nocturnal activity rhythm under laboratory conditions. Light-dark cycle was a determinant factor affecting their photonegative behavior, nocturnal locomotor activity, and feeding behavior. Under natural light conditions, glass eels remained in shelters with little daytime feeding, but came out to forage during darkness. They moved and foraged actively in the following dark, and then their activity gradually declined possibly because of food satiation. They finally buried in the sand or stayed in tubes immediately after the lights came on. Under constant light, glass eels often came out of the shelters to forage in the lights but spent little time moving outside the shelters (e.g. swimming or crawling on the sand). Glass eels took shelter to avoid light and preferred tubes to sand for shelter possibly because tubes were much easier for them to take refuge in than sand. Feeding and locomotor activities of the glass eels were nocturnal and well synchronized. They appeared to depend on olfaction rather than vision to detect and capture prey in darkness. Feeding was the driving force for glass eels to come out of sand under constant light. However, in the dark, some glass eels swam or crept actively on sand even when they were fully fed. The lunar cycles of activity rhythms of glass eels that have been observed in some estuarine areas were not detected under these laboratory conditions.
学科主题	Ecology ; Marine & Freshwater Biology
语种	英语
WOS记录号	WOS:000185494400009
公开日期	2010-12-22
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/2773]
专题	海洋研究所_海洋生态与环境科学重点实验室
作者单位	1.Univ Tokyo, Ocean Res Inst, Tokyo 1648639, Japan 2.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Dou, SZ,Tsukamoto, K. Observations on the nocturnal activity and feeding behavior of Anguilla japonica glass eels under laboratory conditions[J]. ENVIRONMENTAL BIOLOGY OF FISHES,2003,67(4):389-395.
APA	Dou, SZ,&Tsukamoto, K.(2003).Observations on the nocturnal activity and feeding behavior of Anguilla japonica glass eels under laboratory conditions.ENVIRONMENTAL BIOLOGY OF FISHES,67(4),389-395.
MLA	Dou, SZ,et al."Observations on the nocturnal activity and feeding behavior of Anguilla japonica glass eels under laboratory conditions".ENVIRONMENTAL BIOLOGY OF FISHES 67.4(2003):389-395.