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Endangered Species Management Chapter 16

Endangered Species Management Chapter 16. Protected Fishes. 743 native species in US & Canada 418 species (56%) receive some degree of endangered species protection 235 species (32%) are fully protected in all or part of their range by some governmental agency. The Problems.

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Endangered Species Management Chapter 16

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  1. Endangered Species ManagementChapter 16

  2. Protected Fishes • 743 native species in US & Canada • 418 species (56%) receive some degree of endangered species protection • 235 species (32%) are fully protected in all or part of their range by some governmental agency

  3. The Problems • Habitat modification (98%) • Other natural, human factors (intro of exotics) (37%) • Restricted range (16%) • Overexploitation (3%) • Disease (2%)

  4. The Result Bluepike • 27 species, 13 subspecies have gone extinct in North America in past century

  5. Today’s Endangered/Threatened Species Bluepike • 80% in SW or SE United States • 60% are stream fishes (90% warmwater)

  6. Problem Areas • Death Valley - water withdrawals

  7. Problem Areas • Colorado River basin - habitat loss/modification, introduction of nonnative species

  8. Problem Areas • Western trouts - introgression with nonnative trout

  9. Management Today • Maintain/enhance historic populations • Protect, expand, restore habitat • Move specimens to refugia

  10. Management Today • Rear/stock in additional habitats • Minimize conflict with nonnative species • Control exploitation

  11. Today’s Trend • Movement away from single-species approach to ecosystem approach • Inherent need to recognize importance of nongame fishes

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