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Why the population of the northern fur seals (Callorhinus ursinus) of Tyuleniy Island does not recover following the harvest ban: Analysis of 56 years of observation data

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  • Zhdanova, Oksana L.
  • Kuzin, Аlexey Е.
  • Skaletskaya, Elena I.
  • Frisman, Еfim Ya.

Abstract

Following many years of managed harvest, the population size of Northern fur seal on Tyuleniy Island appeared to be depressed. In order to preserve the population, the harvest was first significantly limited, and then banned altogether. However, the birth rates have never recovered. We perform the estimation and analysis of survival rates of different groups of males in the population with the goal of elucidating the underlying changes in intra-population dynamics. We use the estimated numbers of adult males and pups in the rookery along with the exact numbers and ages of animals, harvested over the years.

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  • Zhdanova, Oksana L. & Kuzin, Аlexey Е. & Skaletskaya, Elena I. & Frisman, Еfim Ya., 2017. "Why the population of the northern fur seals (Callorhinus ursinus) of Tyuleniy Island does not recover following the harvest ban: Analysis of 56 years of observation data," Ecological Modelling, Elsevier, vol. 363(C), pages 57-67.
    • Handle: RePEc:eee:ecomod:v:363:y:2017:i:c:p:57-67
    DOI: 10.1016/j.ecolmodel.2017.08.027
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    References listed on IDEAS

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    1. Anders Skonhoft & Niels Vestergaard & Martin Quaas, 2012. "Optimal Harvest in an Age Structured Model with Different Fishing Selectivity," Environmental & Resource Economics, Springer;European Association of Environmental and Resource Economists, vol. 51(4), pages 525-544, April.
    2. Richard Horan & Erwin Bulte, 2004. "Optimal and Open Access Harvesting of Multi-Use Species in a Second-Best World," Environmental & Resource Economics, Springer;European Association of Environmental and Resource Economists, vol. 28(3), pages 251-272, July.
    3. Hauser, C.E. & Runge, M.C. & Cooch, E.G. & Johnson, F.A. & Harvey, W.F., 2007. "Optimal control of Atlantic population Canada geese," Ecological Modelling, Elsevier, vol. 201(1), pages 27-36.
    4. Horan, R.D. & Bulte, E.H., 2004. "Optimal and open access harvesting and multi-use species in a second best world," Other publications TiSEM 95000e50-7225-4f4d-aeaf-a, Tilburg University, School of Economics and Management.
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    Cited by:

    1. Oksana Zhdanova & Alexey Kuzin & Efim Frisman, 2022. "The Harvest Effect on Dynamics of Northern Fur Seal Population: Mathematical Modeling and Data Analysis Results," Mathematics, MDPI, vol. 10(17), pages 1-24, August.

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