Scientific Information in Support of a Recovery Potential Assessment for the Salish Sucker (Catostomus Sp.) in Canada PDF Download
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Author: Brian J. Harvey
Publisher:
ISBN:
Category : Catostomus
Languages : en
Pages : 16
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Author: Brian J. Harvey
Publisher:
ISBN:
Category : Catostomus
Languages : en
Pages : 16
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Author: N. D. Schubert
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ISBN:
Category : Catostomus
Languages : en
Pages : 14
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Author: Michael Philip Pearson
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ISBN:
Category :
Languages : en
Pages : 42
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Little information is available on the natural history, abundance, population trends, and habitat use of the Salish Sucker. Consequently there are many uncertainties in this paper. The Salish Sucker is documented from 11 watersheds in Canada and six in Washington State. No populations are known to have been extirpated, but significant reductions in area occupied within many of the watersheds are documented. Insufficient information exists to estimate minimum viable population size, but the Salish Sucker?s life history traits are associated with rapid population growth, resilience to environmental disturbance, and the ability to rapidly (re)colonize habitat. Seasonal hypoxia is the leading threat, affecting up to two-thirds of the more than 180 km of proposed critical habitat in hot dry summers. Habitat destruction, seasonal dewatering, and toxicity are also considered significant threats. Sediment deposition, habitat fragmentation, and introduced predators may be significant but their impacts are poorly understood. Target population sizes vary from 1500 to 5000 adults in the 11 known populations. Estimates of current abundance exist for all or part of seven populations and are far below target populations in all cases. Achieving targets is feasible if the geographic extent of severe hypoxia in proposed critical habitat is reduced.
Author: Michael Philip Pearson
Publisher:
ISBN:
Category :
Languages : en
Pages : 42
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Little information is available on the natural history, abundance, population trends, and habitat use of the Salish Sucker. Consequently there are many uncertainties in this paper. The Salish Sucker is documented from 11 watersheds in Canada and six in Washington State. No populations are known to have been extirpated, but significant reductions in area occupied within many of the watersheds are documented. Insufficient information exists to estimate minimum viable population size, but the Salish Sucker?s life history traits are associated with rapid population growth, resilience to environmental disturbance, and the ability to rapidly (re)colonize habitat. Seasonal hypoxia is the leading threat, affecting up to two-thirds of the more than 180 km of proposed critical habitat in hot dry summers. Habitat destruction, seasonal dewatering, and toxicity are also considered significant threats. Sediment deposition, habitat fragmentation, and introduced predators may be significant but their impacts are poorly understood. Target population sizes vary from 1500 to 5000 adults in the 11 known populations. Estimates of current abundance exist for all or part of seven populations and are far below target populations in all cases. Achieving targets is feasible if the geographic extent of severe hypoxia in proposed critical habitat is reduced.
Author: D. A. Boguski
Publisher:
ISBN:
Category : Catostomus
Languages : en
Pages : 42
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Category :
Languages : en
Pages : 0
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The conclusions and advice resulting from this review will be provided in the form of a Science Advisory Report to the DFO Species at Risk Program, to provide an assessment of the most current information about Salish Sucker in Canada and the population's potential for recovery. [...] The purpose of the review was to assess information on the species' biology, abundance, distribution and life history parameters; habitat and residence requirements; threats and limiting factors to the species' survival; recovery targets and possible scenarios for mitigation of threats and alternatives to human activities; as well as considerations related to allowable harm. [...] The chair, Sean MacConnachie, welcomed participants and reviewed the role of CSAS in the provision of peer reviewed advice and gave a general overview of the CSAS process. [...] ACKNOWLEDGEMENTS The Chair thanks the reviewers for their expertise in reviewing the working paper, and all of the participants for their constructive engagement in the science review process at this meeting. [...] The advice in the RPA may be used to inform both scientific and socio-economic aspects of the listing decision, development of a recovery strategy and action plan, and to support decision making with regards to the issuance of permits or agreements, and the formulation of exemptions and related conditions, as per sections 73, 74, 75, 77, 78 and 83(4) of SARA.
Author:
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ISBN: 9780660340548
Category : Catostomus
Languages : en
Pages : 71
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Author:
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Category :
Languages : en
Pages : 19
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Author:
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Category :
Languages : en
Pages :
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Author: Jennifer A. M Young
Publisher:
ISBN:
Category : Catostomus
Languages : en
Pages : 17
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