食蚊鱼昼夜摄食节律观察

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Abstract

Mosquito fish,an invasive species,was introduced into mainland China in 1927 and entered Guangzhou during 1960s.The diel feeding rhythm of mosquito fish taken from Ming Lake,an artificial lake in Jinan University in summer,2007 was investigated in this study.Population structure of mosquito fish in summer was very complex,consisting of female,male and larvae fish groups.These feeding groups had different feeding rhythm in this season.Female feeding rhythm showed two peaks at 10:00 and 22:00.The second peak was the highest,and the food in the fish gut was 11.70±11.60 mg and feeding index was 190.22±155.61 at that time.Larvae fish feeding rhythm had two peaks at 6:00 and 18:00,and the highest one peaked at 6:00,when the food in the gut was 1.08±1.09 mg and feeding index was 128.44±105.49.Male fish feeding rhythm had a single peak at 14:00,at which the food in the gut was 0.71±0.96 mg and feeding index was 71.80±107.65.Different feeding rhythms among these three feeding groups could reduce the intra-specific competition.

Key words： mosquito fish feeding rhythm feeding group biological invasion

Received: 25 December 2008

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	Articles by authors
	CHEN Pei
	CHEN Guo-zhu
	LIN Xiao-tao
	XU Zhong-neng

Cite this article:

CHEN Pei,CHEN Guo-zhu,LIN Xiao-tao, et al. Diel feeding rhythm of mosquito fish[J]. , 2008, 27(6): 483-489.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2008/V27/I6/483

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