Evaluating recreational fisheries for an endangered species: a case study of taimen, Hucho taimen, in Mongolia
Understanding the tradeoff between exploitation and conservation is difficult in data-poor situations, which are typical for most recreational fisheries, even in developed countries. In a developing country where the target species is endangered, the stakes are higher and the management resources ar...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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2009
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Online Access: | http://dx.doi.org/10.1139/f09-109 http://www.nrcresearchpress.com/doi/full-xml/10.1139/F09-109 http://www.nrcresearchpress.com/doi/pdf/10.1139/F09-109 |
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crcansciencepubl:10.1139/f09-109 2024-09-15T18:10:58+00:00 Evaluating recreational fisheries for an endangered species: a case study of taimen, Hucho taimen, in Mongolia Jensen, Olaf P. Gilroy, David J. Hogan, Zeb Allen, Brant C. Hrabik, Thomas R. Weidel, Brian C. Chandra, Sudeep Vander Zanden, M. Jake Post, John 2009 http://dx.doi.org/10.1139/f09-109 http://www.nrcresearchpress.com/doi/full-xml/10.1139/F09-109 http://www.nrcresearchpress.com/doi/pdf/10.1139/F09-109 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 66, issue 10, page 1707-1718 ISSN 0706-652X 1205-7533 journal-article 2009 crcansciencepubl https://doi.org/10.1139/f09-109 2024-08-15T04:09:29Z Understanding the tradeoff between exploitation and conservation is difficult in data-poor situations, which are typical for most recreational fisheries, even in developed countries. In a developing country where the target species is endangered, the stakes are higher and the management resources are fewer. We combined a mark–recapture experiment, life history invariants, and meta-analysis to parameterize a delay-difference model for a population of the endangered giant Eurasian trout (taimen, Hucho taimen ) in northern Mongolia. The model allowed us to evaluate the impacts of a recreational fishery for taimen based on a suite of population characteristics including equilibrium abundance, biomass, and mean weight. The Bayesian framework and Monte Carlo simulations combine disparate sources of information while keeping track of uncertainty as it propagates through the model. In the case of taimen in the Eg–Uur watershed, the existing catch–release recreational fishery has likely reduced taimen abundance, biomass, and mean weight by less than 10% compared with levels predicted in the absence of recreational fishing. In comparison, if all taimen caught in this fishery were retained (as they are elsewhere in Mongolia), there is a 57% chance that such harvest levels, if maintained, would lead to the eventual extirpation of the population. Article in Journal/Newspaper Hucho taimen Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 66 10 1707 1718 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Understanding the tradeoff between exploitation and conservation is difficult in data-poor situations, which are typical for most recreational fisheries, even in developed countries. In a developing country where the target species is endangered, the stakes are higher and the management resources are fewer. We combined a mark–recapture experiment, life history invariants, and meta-analysis to parameterize a delay-difference model for a population of the endangered giant Eurasian trout (taimen, Hucho taimen ) in northern Mongolia. The model allowed us to evaluate the impacts of a recreational fishery for taimen based on a suite of population characteristics including equilibrium abundance, biomass, and mean weight. The Bayesian framework and Monte Carlo simulations combine disparate sources of information while keeping track of uncertainty as it propagates through the model. In the case of taimen in the Eg–Uur watershed, the existing catch–release recreational fishery has likely reduced taimen abundance, biomass, and mean weight by less than 10% compared with levels predicted in the absence of recreational fishing. In comparison, if all taimen caught in this fishery were retained (as they are elsewhere in Mongolia), there is a 57% chance that such harvest levels, if maintained, would lead to the eventual extirpation of the population. |
author2 |
Post, John |
format |
Article in Journal/Newspaper |
author |
Jensen, Olaf P. Gilroy, David J. Hogan, Zeb Allen, Brant C. Hrabik, Thomas R. Weidel, Brian C. Chandra, Sudeep Vander Zanden, M. Jake |
spellingShingle |
Jensen, Olaf P. Gilroy, David J. Hogan, Zeb Allen, Brant C. Hrabik, Thomas R. Weidel, Brian C. Chandra, Sudeep Vander Zanden, M. Jake Evaluating recreational fisheries for an endangered species: a case study of taimen, Hucho taimen, in Mongolia |
author_facet |
Jensen, Olaf P. Gilroy, David J. Hogan, Zeb Allen, Brant C. Hrabik, Thomas R. Weidel, Brian C. Chandra, Sudeep Vander Zanden, M. Jake |
author_sort |
Jensen, Olaf P. |
title |
Evaluating recreational fisheries for an endangered species: a case study of taimen, Hucho taimen, in Mongolia |
title_short |
Evaluating recreational fisheries for an endangered species: a case study of taimen, Hucho taimen, in Mongolia |
title_full |
Evaluating recreational fisheries for an endangered species: a case study of taimen, Hucho taimen, in Mongolia |
title_fullStr |
Evaluating recreational fisheries for an endangered species: a case study of taimen, Hucho taimen, in Mongolia |
title_full_unstemmed |
Evaluating recreational fisheries for an endangered species: a case study of taimen, Hucho taimen, in Mongolia |
title_sort |
evaluating recreational fisheries for an endangered species: a case study of taimen, hucho taimen, in mongolia |
publisher |
Canadian Science Publishing |
publishDate |
2009 |
url |
http://dx.doi.org/10.1139/f09-109 http://www.nrcresearchpress.com/doi/full-xml/10.1139/F09-109 http://www.nrcresearchpress.com/doi/pdf/10.1139/F09-109 |
genre |
Hucho taimen |
genre_facet |
Hucho taimen |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 66, issue 10, page 1707-1718 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f09-109 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
66 |
container_issue |
10 |
container_start_page |
1707 |
op_container_end_page |
1718 |
_version_ |
1810448568274649088 |