A theory of stochastic harvesting in stochastic environments
Jonzén, Niclas LU ; Ripa, Jörgen LU
and Lundberg, Per
LU
(2002)
In American Naturalist
159(5).
p.427-437
- Abstract
- We investigate how model populations respond to stochastic harvesting in a stochastic environment. In particular, we show that the effects of variable harvesting on the variance in population density and yield depend critically on the autocorrelation of environmental noise and on whether the endogenous dynamics of the population display over- or undercompensation to density. These factors interact in complicated ways; harvesting shifts the slope of the renewal function, and the net effect of this shift will depend on the sign and magnitude of the other influences. For example, when environmental noise exhibits a positive auto correlation, the relative importance of a variable harvest to the variance in density increases with... (More)
- We investigate how model populations respond to stochastic harvesting in a stochastic environment. In particular, we show that the effects of variable harvesting on the variance in population density and yield depend critically on the autocorrelation of environmental noise and on whether the endogenous dynamics of the population display over- or undercompensation to density. These factors interact in complicated ways; harvesting shifts the slope of the renewal function, and the net effect of this shift will depend on the sign and magnitude of the other influences. For example, when environmental noise exhibits a positive auto correlation, the relative importance of a variable harvest to the variance in density increases with overcompensation but decreases with undercompensation. For a fixed harvesting level, an increasing level of autocorrelation in environmental noise will decrease the relative variation in population density when overcompensation would otherwise occur. These and other intricate interactions have important ramifications for the interpretation of time series data when no prior knowledge of demographic or environmental details exists, These effects are important whenever the harvesting rate is sufficiently high or variable, conditions likely to occur in many systems, whether the harvesting is caused by commercial exploitation or by any other strong agent of density-independent mortality. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/147529
- author
- Jonzén, Niclas
LU
; Ripa, Jörgen
LU
and Lundberg, Per
LU
- organization
- publishing date
- 2002
- type
- Contribution to journal
- publication status
- published
- subject
- in
- American Naturalist
- volume
- 159
- issue
- 5
- pages
- 427 - 437
- publisher
- University of Chicago Press
- external identifiers
-
- wos:000175302800001
- scopus:0036231906
- ISSN
- 0003-0147
- language
- English
- LU publication?
- yes
- id
- dcad8935-f6de-46a1-bcbc-4ce266427fbd (old id 147529)
- alternative location
- http://lup.lub.lu.se/luur?func=downloadFile&fileOId=625136
- date added to LUP
- 2016-04-01 12:15:24
- date last changed
- 2022-02-26 04:38:53
@article{dcad8935-f6de-46a1-bcbc-4ce266427fbd,
abstract = {{We investigate how model populations respond to stochastic harvesting in a stochastic environment. In particular, we show that the effects of variable harvesting on the variance in population density and yield depend critically on the autocorrelation of environmental noise and on whether the endogenous dynamics of the population display over- or undercompensation to density. These factors interact in complicated ways; harvesting shifts the slope of the renewal function, and the net effect of this shift will depend on the sign and magnitude of the other influences. For example, when environmental noise exhibits a positive auto correlation, the relative importance of a variable harvest to the variance in density increases with overcompensation but decreases with undercompensation. For a fixed harvesting level, an increasing level of autocorrelation in environmental noise will decrease the relative variation in population density when overcompensation would otherwise occur. These and other intricate interactions have important ramifications for the interpretation of time series data when no prior knowledge of demographic or environmental details exists, These effects are important whenever the harvesting rate is sufficiently high or variable, conditions likely to occur in many systems, whether the harvesting is caused by commercial exploitation or by any other strong agent of density-independent mortality.}},
author = {{Jonzén, Niclas and Ripa, Jörgen and Lundberg, Per}},
issn = {{0003-0147}},
language = {{eng}},
number = {{5}},
pages = {{427--437}},
publisher = {{University of Chicago Press}},
series = {{American Naturalist}},
title = {{A theory of stochastic harvesting in stochastic environments}},
url = {{https://lup.lub.lu.se/search/files/2847897/625136.pdf}},
volume = {{159}},
year = {{2002}},
}