Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1621040114 |
Effect of a fish stock's demographic structure on offspring survival and sensitivity to climate | |
Stige, Leif Christian1,5; Yaragina, Natalia A.2; Langangen, Oystein1; Bogstad, Bjarte3; Stenseth, Nils Chr.1,4; Ottersen, Geir1,6,7 | |
2017-02-07 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2017 |
卷号 | 114期号:6页码:1347-1352 |
文章类型 | Article |
语种 | 英语 |
国家 | Norway; Russia |
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 | fisheries age and size truncation population dynamics climate effects Gadus morhua |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000393422200046 |
WOS关键词 | COD GADUS-MORHUA ; NORTHEAST ARCTIC COD ; TRUNCATED SPAWNING DISTRIBUTION ; LONG-TERM CHANGE ; EGG-PRODUCTION ; AGE-STRUCTURE ; BARENTS SEA ; JUVENILE ABUNDANCE ; SPATIAL VARIATIONS ; RECRUITMENT |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204847 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Oslo, Dept Biosci, Ctr Ecol & Evolutionary Synth, N-0316 Oslo, Norway; 2.Knipovich Polar Res Inst Marine Fisheries & Ocean, Demersal Fish Lab, Murmansk 183038, Russia; 3.Inst Marine Res, Demersal Fish Res Grp, N-5817 Bergen, Norway; 4.Inst Marine Res, Flodevigen Marine Res Stn, N-4817 His, Norway; 5.Univ Agder, Ctr Coastal Res, NO-4604 Kristiansand, Norway; 6.Inst Marine Res, Res Grp Oceanog & Climate, N-5817 Bergen, Norway; 7.Hjort Ctr Marine Ecosyst Dynam, N-5817 Bergen, Norway |
推荐引用方式 GB/T 7714 | Stige, Leif Christian,Yaragina, Natalia A.,Langangen, Oystein,et al. Effect of a fish stock's demographic structure on offspring survival and sensitivity to climate[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(6):1347-1352. |
APA | Stige, Leif Christian,Yaragina, Natalia A.,Langangen, Oystein,Bogstad, Bjarte,Stenseth, Nils Chr.,&Ottersen, Geir.(2017).Effect of a fish stock's demographic structure on offspring survival and sensitivity to climate.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(6),1347-1352. |
MLA | Stige, Leif Christian,et al."Effect of a fish stock's demographic structure on offspring survival and sensitivity to climate".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.6(2017):1347-1352. |
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