全球智库信息集成服务系统(G2TT): Scale Analysis Suggests Frequent Skipping of Second Reproductive Season in Atlantic Herring.

G2TT

来源类型	Monograph (IIASA Interim Report)
规范类型	报告
	Scale Analysis Suggests Frequent Skipping of Second Reproductive Season in Atlantic Herring.
	Engelhard GH; Heino M
发表日期	2005
出版者	IIASA, Laxenburg, Austria: IR-05-075
出版年	2005
语种	英语
摘要	A common assumption in fish studies is that iteroparous fish, once mature, normally reproduce in all consecutive seasons. Analysis of scales from Norwegian spring-spawning herring collected between 1935-1973 revealed strong under-representation (47% of expected) of second-time spawners on the spawning grounds. This reduction is not explained satisfactorily by possible errors in scale-reading, suggesting that the second reproductive season is frequently skipped. Skipping a season may relate to trade-offs between growth, current and future reproduction, and survival, which are likely to be particularly strong for young adult herring.
主题	Adaptive Dynamics Network (ADN)
关键词	Clupea harengus Current and future reproduction Fishery management Life-history trade-off Migration cost Survival
URL	http://pure.iiasa.ac.at/id/eprint/7767/
来源智库	International Institute for Applied Systems Analysis (Austria)
资源类型	智库出版物
条目标识符	http://119.78.100.153/handle/2XGU8XDN/125399
推荐引用方式 GB/T 7714	Engelhard GH,Heino M. Scale Analysis Suggests Frequent Skipping of Second Reproductive Season in Atlantic Herring.. 2005.