期刊
JOURNAL OF MATHEMATICAL BIOLOGY
卷 65, 期 5, 页码 997-1016出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00285-011-0489-2
关键词
Discrete population model; Harvesting; Bubbles; Hydra effect; Chaos
资金
- Spanish Ministry of Science and Innovation [MTM2008-02502]
- FEDER [MTM2010-14837]
We analyze the effects of a strategy of constant effort harvesting in the global dynamics of a one-dimensional discrete population model that includes density-independent survivorship of adults and overcompensating density dependence. We discuss the phenomenon of bubbling (which indicates that harvesting can magnify fluctuations in population abundance) and the hydra effect, which means that the stock size gets larger as harvesting rate increases. Moreover, we show that the system displays chaotic behaviour under the combination of high per capita recruitment and small survivorship rates.
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