Harvesting-induced population fluctuations?
(2003) In Wildlife Biology 9(1). p.59-65- Abstract
- It has recently been shown that damped endogenous dynamics is a common feature in Finnish grouse species; In this paper, we demonstrate that time-variant harvesting may turn damped dynamics to quasi-periodic fluctuations. Exploited populations, e.g. grouse, may therefore fluctuate more than expected if we do not manage to keep the harvest fraction constant over time. However, the harvest fraction of Finnish grouse varies with the phase of the cycle. Such a harvesting strategy could potentially change the periodicity of the fluctuations, as can a threshold harvest strategy where a constant fraction is harvested above a density threshold. The two non-linear harvesting strategies investigated here can modulate the dynamic properties of the... (More)
- It has recently been shown that damped endogenous dynamics is a common feature in Finnish grouse species; In this paper, we demonstrate that time-variant harvesting may turn damped dynamics to quasi-periodic fluctuations. Exploited populations, e.g. grouse, may therefore fluctuate more than expected if we do not manage to keep the harvest fraction constant over time. However, the harvest fraction of Finnish grouse varies with the phase of the cycle. Such a harvesting strategy could potentially change the periodicity of the fluctuations, as can a threshold harvest strategy where a constant fraction is harvested above a density threshold. The two non-linear harvesting strategies investigated here can modulate the dynamic properties of the population in a way not predicted by linear models. We argue that the behaviour of exploited populations and the role of harvesting can only be understood if we identify and understand the interplay of endogenous and exogenous components of population dynamics. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/135484
- author
- Jonzén, Niclas LU ; Ranta, E ; Lundberg, Per LU ; Kaitala, V and Linden, H
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Wildlife Biology
- volume
- 9
- issue
- 1
- pages
- 59 - 65
- publisher
- Nordic Council of Wildlife Research
- external identifiers
-
- wos:000181956600007
- scopus:0037351935
- ISSN
- 0909-6396
- language
- English
- LU publication?
- yes
- id
- c623dce5-6c9d-4d17-ac40-3fd6824866fd (old id 135484)
- date added to LUP
- 2016-04-01 17:06:36
- date last changed
- 2022-04-23 02:48:00
@article{c623dce5-6c9d-4d17-ac40-3fd6824866fd,
abstract = {{It has recently been shown that damped endogenous dynamics is a common feature in Finnish grouse species; In this paper, we demonstrate that time-variant harvesting may turn damped dynamics to quasi-periodic fluctuations. Exploited populations, e.g. grouse, may therefore fluctuate more than expected if we do not manage to keep the harvest fraction constant over time. However, the harvest fraction of Finnish grouse varies with the phase of the cycle. Such a harvesting strategy could potentially change the periodicity of the fluctuations, as can a threshold harvest strategy where a constant fraction is harvested above a density threshold. The two non-linear harvesting strategies investigated here can modulate the dynamic properties of the population in a way not predicted by linear models. We argue that the behaviour of exploited populations and the role of harvesting can only be understood if we identify and understand the interplay of endogenous and exogenous components of population dynamics.}},
author = {{Jonzén, Niclas and Ranta, E and Lundberg, Per and Kaitala, V and Linden, H}},
issn = {{0909-6396}},
language = {{eng}},
number = {{1}},
pages = {{59--65}},
publisher = {{Nordic Council of Wildlife Research}},
series = {{Wildlife Biology}},
title = {{Harvesting-induced population fluctuations?}},
volume = {{9}},
year = {{2003}},
}