全球智库信息集成服务系统(G2TT): The logic of skipped spawning in fish.

G2TT

来源类型	Article
规范类型	其他
DOI	10.1139/F05-210
	The logic of skipped spawning in fish.
	Joergensen C; Enande B; Fiksen O; Dieckmann U
发表日期	2006
出处	Canadian Journal of Fisheries and Aquatic Sciences 63 (1): 200-211
出版年	2006
语种	英语
摘要	That sexually mature fish skip reproduction, especially in response to poor condition, has been documented in many species. We present results from an energy-allocation life history model that shed light on the underlying logic of skipped spawning, based on the Northeast Arctic stock of Atlantic cod (Gadus morhua). The model predicts that skipped spawning is a regular phenomenon, with up to 30% of the sexually mature biomass skipping spawning. Spawning should be skipped if the expected future gain in reproductive output, discounted by survival, more than balances the expected reproductive success the current year. Skipped spawning was most common (i) among potential second-time spawners and (ii) early in life, (iii) when fishing mortality at the spawning grounds was high, (iv) when fishing mortality at the feeding grounds was low, (v) when natural mortality was low, and (vi) when the energetic and mortality costs associated with migration and spawning were high. Cod skipped spawning more often when food availability was both increased (opportunities for better growth) and decreased (too little energy for gonad development), and this pattern interacted with mortality rate. We conclude that skipped spawning may be more widespread than appreciated and highlight potential consequences for the understanding of stock-recruitment relationships.
主题	Evolution and Ecology (EEP)
URL	http://pure.iiasa.ac.at/id/eprint/7894/
来源智库	International Institute for Applied Systems Analysis (Austria)
引用统计
资源类型	智库出版物
条目标识符	http://119.78.100.153/handle/2XGU8XDN/128572
推荐引用方式 GB/T 7714	Joergensen C,Enande B,Fiksen O,et al. The logic of skipped spawning in fish.. 2006.