Random-walk dynamics of exploited fish populations
Abstract Niwa, H-S. 2007. Random-walk dynamics of exploited fish populations. – ICES Journal of Marine Science, 64: 496–502. Fished populations have been heavily fished over a wide range of stock sizes, and the data for such stocks are potentially of great interest. Population variability in stock h...
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsm004 http://academic.oup.com/icesjms/article-pdf/64/3/496/29127410/fsm004.pdf |
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croxfordunivpr:10.1093/icesjms/fsm004 2023-12-31T10:20:40+01:00 Random-walk dynamics of exploited fish populations Niwa, Hiro-Sato 2007 http://dx.doi.org/10.1093/icesjms/fsm004 http://academic.oup.com/icesjms/article-pdf/64/3/496/29127410/fsm004.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 64, issue 3, page 496-502 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2007 croxfordunivpr https://doi.org/10.1093/icesjms/fsm004 2023-12-06T08:55:12Z Abstract Niwa, H-S. 2007. Random-walk dynamics of exploited fish populations. – ICES Journal of Marine Science, 64: 496–502. Fished populations have been heavily fished over a wide range of stock sizes, and the data for such stocks are potentially of great interest. Population variability in stock histories has focused attention on the predictability of conditions of sustainability when harvesting fish. Here, I examine empirically the time-series data on 27 commercial fish stocks in the North Atlantic. The variability in population growth rate (i.e. the annual changes in the logarithms of population abundance) is described by a Gaussian distribution. The signs (up or down) of successive changes in the population trajectory are independent, as if determined by the toss of a coin. The process of population variability therefore corresponds to a geometric random walk. Article in Journal/Newspaper North Atlantic Oxford University Press (via Crossref) ICES Journal of Marine Science 64 3 496 502 |
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Open Polar |
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Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Niwa, Hiro-Sato Random-walk dynamics of exploited fish populations |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Niwa, H-S. 2007. Random-walk dynamics of exploited fish populations. – ICES Journal of Marine Science, 64: 496–502. Fished populations have been heavily fished over a wide range of stock sizes, and the data for such stocks are potentially of great interest. Population variability in stock histories has focused attention on the predictability of conditions of sustainability when harvesting fish. Here, I examine empirically the time-series data on 27 commercial fish stocks in the North Atlantic. The variability in population growth rate (i.e. the annual changes in the logarithms of population abundance) is described by a Gaussian distribution. The signs (up or down) of successive changes in the population trajectory are independent, as if determined by the toss of a coin. The process of population variability therefore corresponds to a geometric random walk. |
format |
Article in Journal/Newspaper |
author |
Niwa, Hiro-Sato |
author_facet |
Niwa, Hiro-Sato |
author_sort |
Niwa, Hiro-Sato |
title |
Random-walk dynamics of exploited fish populations |
title_short |
Random-walk dynamics of exploited fish populations |
title_full |
Random-walk dynamics of exploited fish populations |
title_fullStr |
Random-walk dynamics of exploited fish populations |
title_full_unstemmed |
Random-walk dynamics of exploited fish populations |
title_sort |
random-walk dynamics of exploited fish populations |
publisher |
Oxford University Press (OUP) |
publishDate |
2007 |
url |
http://dx.doi.org/10.1093/icesjms/fsm004 http://academic.oup.com/icesjms/article-pdf/64/3/496/29127410/fsm004.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ICES Journal of Marine Science volume 64, issue 3, page 496-502 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fsm004 |
container_title |
ICES Journal of Marine Science |
container_volume |
64 |
container_issue |
3 |
container_start_page |
496 |
op_container_end_page |
502 |
_version_ |
1786831150323335168 |