Control of structured populations by harvest

Hauser, C. E., Cooch, E. G. and LEBRETON, J. D. (2006) Control of structured populations by harvest. Ecological Modelling, 196 3-4: 462-470. doi:10.1016/j.ecolmodel.2006.02.012


Author Hauser, C. E.
Cooch, E. G.
LEBRETON, J. D.
Title Control of structured populations by harvest
Journal name Ecological Modelling   Check publisher's open access policy
ISSN 0304-3800
Publication date 2006
Sub-type Article (original research)
DOI 10.1016/j.ecolmodel.2006.02.012
Volume 196
Issue 3-4
Start page 462
End page 470
Total pages 9
Editor S. E. JORGENSEN
Place of publication Amsterdam
Publisher Elsevier Science Bv
Collection year 2006
Language eng
Subject C1
239901 Biological Mathematics
770403 Living resources (flora and fauna)
0501 Ecological Applications
Abstract It has long been recognized that demographic structure within a population can significantly affect the likely outcomes of harvest. Many studies have focussed on equilibrium dynamics and maximization of the value of the harvest taken. However, in some cases the management objective is to maintain the population at a abundance that is significantly below the carrying capacity. Achieving such an objective by harvest can be complicated by the presence of significant structure (age or stage) in the target population. in such cases, optimal harvest strategies must account for differences among age- or stage-classes of individuals in their relative contribution to the demography of the population. In addition, structured populations are also characterized by transient non-linear dynamics following perturbation, such that even under an equilibrium harvest, the population may exhibit significant momentum, increasing or decreasing before cessation of growth. Using simple linear time-invariant models, we show that if harvest levels are set dynamically (e.g., annually) then transient effects can be as or more important than equilibrium outcomes. We show that appropriate harvest rates can be complicated by uncertainty about the demographic structure of the population, or limited control over the structure of the harvest taken. (c) 2006 Elsevier B.V. All rights reserved.
Keyword age-structure
harvest models
matrix models
population momentum
reproductive value
uncertainty
Saiga Antelope
Model
Management
Dynamics
Optimization
Uncertainty
Waterfowl
Sex
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Spatial Ecology Lab Publications
2007 Higher Education Research Data Collection
School of Biological Sciences Publications
 
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Created: Wed, 15 Aug 2007, 08:33:54 EST