Temperature influence on the spawning performance of artificially-matured Japanese eel, Anguilla japonica, in captivity

doi:10.1007/s10641-007-9268-8

	Temperature influence on the spawning performance of artificially-matured Japanese eel, Anguilla japonica, in captivity
	Dou, Shuo-Zeng 1; Yamada, Yoshiaki 2; Okamura, Akihiro 2; Shinoda, Akira 3; Tanaka, Satoru 2; Tsukamoto, Katsumi 3
	2008-06-01
发表期刊	ENVIRONMENTAL BIOLOGY OF FISHES
ISSN	0378-1909
卷号	82 期号:2 页码:151-164
文章类型	Article
摘要	We studied the influence of temperature on the spawning performance of artificially matured Japanese eels, Anguilla japonica, in captivity. We used routine hormone injections to bring females and males to maturity in separate aquaria. We recorded the behavior of three pairs of such hormone-treated matured eels in an aquarium (2 replicates) at four temperatures: 14, 18, 22, and 27 degrees C, respectively. They became active and frequently left the bottom swimming in the water column, and spawning events occurred. Females released eggs in the water column around the activity peaks. Males preceded females in reaching activity peaks (presumably the timing of sperm ejection and egg release), possibly resulting in the low fertilization we observed in this experiment. Males and females returned back to the aquarium bottoms and became quiet after spawning. On several occasions, male-female or female-female pairs were observed to 'cruise together' in the water column for several to tens of seconds prior to egg releasing, but no courtship behavior indicative of spawning such as pairing and chasing was observed in the eels in our study. Our results suggest that 18-22 degrees C might be the thermal preference for spawning for Japanese eels, which approximates the temperature range of the 500 m deep water layer around the Mariana Islands seamount area, the presumed spawning site for the Japanese eel.; We studied the influence of temperature on the spawning performance of artificially matured Japanese eels, Anguilla japonica, in captivity. We used routine hormone injections to bring females and males to maturity in separate aquaria. We recorded the behavior of three pairs of such hormone-treated matured eels in an aquarium (2 replicates) at four temperatures: 14, 18, 22, and 27 degrees C, respectively. They became active and frequently left the bottom swimming in the water column, and spawning events occurred. Females released eggs in the water column around the activity peaks. Males preceded females in reaching activity peaks (presumably the timing of sperm ejection and egg release), possibly resulting in the low fertilization we observed in this experiment. Males and females returned back to the aquarium bottoms and became quiet after spawning. On several occasions, male-female or female-female pairs were observed to 'cruise together' in the water column for several to tens of seconds prior to egg releasing, but no courtship behavior indicative of spawning such as pairing and chasing was observed in the eels in our study. Our results suggest that 18-22 degrees C might be the thermal preference for spawning for Japanese eels, which approximates the temperature range of the 500 m deep water layer around the Mariana Islands seamount area, the presumed spawning site for the Japanese eel.
关键词	Activity Off-bottom Swimming Hormone-treated Maturation Anguillid Eel
学科领域	Ecology ; Marine & Freshwater Biology
DOI	10.1007/s10641-007-9268-8
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000255191300006
引用统计	被引频次：33[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/5330
专题	海洋生态与环境科学重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266701, Peoples R China 2.Irago Inst Co Ltd, Aichi 4413605, Japan 3.Univ Tokyo, Ocean Res Inst, Tokyo 1648639, Japan
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Dou, Shuo-Zeng,Yamada, Yoshiaki,Okamura, Akihiro,et al. Temperature influence on the spawning performance of artificially-matured Japanese eel, Anguilla japonica, in captivity[J]. ENVIRONMENTAL BIOLOGY OF FISHES,2008,82(2):151-164.
APA	Dou, Shuo-Zeng,Yamada, Yoshiaki,Okamura, Akihiro,Shinoda, Akira,Tanaka, Satoru,&Tsukamoto, Katsumi.(2008).Temperature influence on the spawning performance of artificially-matured Japanese eel, Anguilla japonica, in captivity.ENVIRONMENTAL BIOLOGY OF FISHES,82(2),151-164.
MLA	Dou, Shuo-Zeng,et al."Temperature influence on the spawning performance of artificially-matured Japanese eel, Anguilla japonica, in captivity".ENVIRONMENTAL BIOLOGY OF FISHES 82.2(2008):151-164.

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