气候变化领域集成服务门户(CCPortal): Effect of a fish stock's demographic structure on offspring survival & sensitivity to climate

CCPortal

DOI	10.1073/pnas.1621040114
	Effect of a fish stock's demographic structure on offspring survival & sensitivity to climate
	Stige L.C.; Yaragina N.A.; Langangen Ø.; Bogstad B.; Chr Stenseth N.; Ottersen G.
发表日期	2017
ISSN	0027-8424
起始页码	1347
结束页码	1352
卷号	114 期号:6
英文摘要	Commercial fishing generally removes large and old individuals from fish stocks, reducing mean age and age diversity among spawners. It is feared that these demographic changes lead to lower and more variable recruitment to the stocks. A key proposed pathway is that juvenation and reduced size distribution causes reduced ranges in spawning period, spawning location, and egg buoyancy; this is proposed to lead to reduced spatial distribution of fish eggs and larvae, more homogeneous ambient environmental conditions within each year-class, and reduced buffering against negative environmental influences. However, few, if any, studies have confirmed a causal link from spawning stock demographic structure through egg and larval distribution to year class strength at recruitment. We here show that high mean age and size in the spawning stock of Barents Sea cod (Gadus morhua) is positively associated with high abundance and wide spatiotemporal distribution of cod eggs. We find, however, no support for the hypothesis that a wide egg distribution leads to higher recruitment or a weaker recruitment-Temperature correlation. These results are based on statistical analyses of a spatially resolved data set on cod eggs covering a period (1959-1993) with large changes in biomass and demographic structure of spawners. The analyses also account for significant effects of spawning stock biomass and a liver condition index on egg abundance and distribution. Our results suggest that the buffering effect of a geographically wide distribution of eggs and larvae on fish recruitment may be insignificant compared with other impacts.
英文关键词	Age & size truncation; Climate effects; Fisheries; Gadus morhua; Population dynamics
语种	英语
scopus关键词	Article; Atlantic cod; biomass; climate; demography; egg production; fish stock; nonhuman; priority journal; progeny; spawning; survival; temperature sensitivity; animal; environmental protection; female; fishery; geography; larva; male; Norway; ovum; physiology; population dynamics; population growth; procedures; Russian Federation; sea; Animals; Climate; Conservation of Natural Resources; Female; Fisheries; Gadus morhua; Geography; Larva; Male; Norway; Oceans and Seas; Ovum; Population Dynamics; Population Growth; Russia
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160664
作者单位	Stige, L.C., Department of Biosciences, Centre for Ecological and Evolutionary Synthesis, University of Oslo, Oslo, N-0316, Norway; Yaragina, N.A., Knipovich Polar Research Institute of Marine Fisheries and Oceanography, Demersal Fish Laboratory, Murmansk, 183038, Russian Federation; Langangen, Ø., Department of Biosciences, Centre for Ecological and Evolutionary Synthesis, University of Oslo, Oslo, N-0316, Norway; Bogstad, B., Demersal Fish Research Group, Institute of Marine Research, Bergen, N-5817, Norway; Chr Stenseth, N., Department of Biosciences, Centre for Ecological and Evolutionary Synthesis, University of Oslo, Oslo, N-0316, Norway, Flødevigen Marine Research Station, Institute of Marine Research, His, N-4817, Norway, Centre for Coastal Research, University of Agder, Kristiansand, NO-4604, Norway; Ottersen, G., Department of Biosciences, Centre for Ecological and Evolutionary Synthesis, University of Oslo, Oslo, N-0316, Norway, Research Group of Oceanography and Climate, Institute of Marine Re...
推荐引用方式 GB/T 7714	Stige L.C.,Yaragina N.A.,Langangen Ø.,et al. Effect of a fish stock's demographic structure on offspring survival & sensitivity to climate[J],2017,114(6).
APA	Stige L.C.,Yaragina N.A.,Langangen Ø.,Bogstad B.,Chr Stenseth N.,&Ottersen G..(2017).Effect of a fish stock's demographic structure on offspring survival & sensitivity to climate.Proceedings of the National Academy of Sciences of the United States of America,114(6).
MLA	Stige L.C.,et al."Effect of a fish stock's demographic structure on offspring survival & sensitivity to climate".Proceedings of the National Academy of Sciences of the United States of America 114.6(2017).