Random-walk dynamics of exploited fish populations
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 em...
Main Author: | |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
2007
|
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.590.9793 http://icesjms.oxfordjournals.org/content/64/3/496.full.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.590.9793 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.590.9793 2023-05-15T17:31:44+02:00 Random-walk dynamics of exploited fish populations Hiro-sato Niwa The Pennsylvania State University CiteSeerX Archives 2007 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.590.9793 http://icesjms.oxfordjournals.org/content/64/3/496.full.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.590.9793 http://icesjms.oxfordjournals.org/content/64/3/496.full.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://icesjms.oxfordjournals.org/content/64/3/496.full.pdf Gaussian distribution geometric random walk non-stationary population dynamics time-series analysis text 2007 ftciteseerx 2016-01-08T13:31:28Z 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. Text North Atlantic Unknown |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
topic |
Gaussian distribution geometric random walk non-stationary population dynamics time-series analysis |
spellingShingle |
Gaussian distribution geometric random walk non-stationary population dynamics time-series analysis Hiro-sato Niwa Random-walk dynamics of exploited fish populations |
topic_facet |
Gaussian distribution geometric random walk non-stationary population dynamics time-series analysis |
description |
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. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Hiro-sato Niwa |
author_facet |
Hiro-sato Niwa |
author_sort |
Hiro-sato Niwa |
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 |
publishDate |
2007 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.590.9793 http://icesjms.oxfordjournals.org/content/64/3/496.full.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
http://icesjms.oxfordjournals.org/content/64/3/496.full.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.590.9793 http://icesjms.oxfordjournals.org/content/64/3/496.full.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766129458185502720 |