Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016GL071751 |
Collapse and recovery of forage fish populations prior to commercial exploitation | |
McClatchie, S.1; Hendy, I. L.2; Thompson, A. R.1; Watson, W.1 | |
2017-02-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | We use a new, well-calibrated 500 year paleorecord off southern California to determine collapse frequency, cross correlation, persistence, and return times of exploited forage fish populations. The paleorecord shows that "collapse" (defined as <10% of the mean peak biomass) is a normal state repeatedly experienced by northern anchovy, Pacific hake, and Pacific sardine which were collapsed 29-40% of the time, prior to commercial fishing exploitation. Mean (+/- SD) persistence of "fishable biomass" (defined as one third mean peak biomass from the paleorecord) was 19 +/- 18, 15 +/- 17, and 12 +/- 7 years for anchovy, hake, and sardine. Mean return times to the same biomass was 8 years for anchovy but 22 years for sardine and hake. Further, we find that sardine and anchovy are positively correlated over 400 years, consistent with coherent declines of both species off California. Persistence and return times combined with positive sardine-anchovy correlation indicate that on average 1-2 decades of fishable biomass will be followed by 1-2 decades of low forage. Forage populations are resilient on the 500 year time scale, but their collapse and recovery cycle (based on the paleorecord) are suited to alternating periods of high fishing mortality and periods of little or no fishing. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396411100032 |
WOS关键词 | SANTA-BARBARA BASIN ; CALIFORNIA SEA LIONS ; SARDINE ; SEDIMENTS ; HISTORY ; BIOMASS ; CATCH |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/29029 |
专题 | 气候变化 |
作者单位 | 1.NOAA, Fisheries Serv, Southwest Fisheries Sci Ctr, Fisheries Resources Div, La Jolla, CA 92037 USA; 2.Univ Michigan, Dept Earth & Environm Sci, Ann Arbor, MI 48109 USA |
推荐引用方式 GB/T 7714 | McClatchie, S.,Hendy, I. L.,Thompson, A. R.,et al. Collapse and recovery of forage fish populations prior to commercial exploitation[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(4). |
APA | McClatchie, S.,Hendy, I. L.,Thompson, A. R.,&Watson, W..(2017).Collapse and recovery of forage fish populations prior to commercial exploitation.GEOPHYSICAL RESEARCH LETTERS,44(4). |
MLA | McClatchie, S.,et al."Collapse and recovery of forage fish populations prior to commercial exploitation".GEOPHYSICAL RESEARCH LETTERS 44.4(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论