Legal Framework. Endangered Species Act (1973) Identify species at risk Endangered Threatened Candidate species

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Transcription:

Conservation Moral vs. legal issues What is the goal of conservation? At what level do you try and conserve? Legal framework, national vs. international issues Economics vs. ethics Legal Framework Endangered Species Act (1973) Identify species at risk Endangered Threatened Candidate species Species petitioned for listing (candidate) Study and assessment Recommendation from USFWS Period of public comment Recovery plan, definition of vital habitat Periodic review 1

Conservation Status of Fishes Pressures on fishes Habitat loss Fisheries Impoundments Introduced species Order Data Deficient Near Threatened Vulnerable Critically Endangered Endangered Extinct in Wild Extinct Grand Total ACIPENSERIFORMES 2 4 17 2 25 ALBULIFORMES 7 1 1 9 ANGUILLIFORMES 29 6 3 1 1 40 ATHERINIFORMES 29 12 48 10 11 110 AULOPIFORMES 5 5 BATRACHOIDIFORMES 3 9 12 BELONIFORMES 12 1 8 2 4 27 BERYCIFORMES 4 2 6 CHARACIFORMES 38 5 18 3 9 73 CLUPEIFORMES 15 13 3 2 33 CYPRINIFORMES 615 105 306 140 240 24 1436 CYPRINODONTIFORMES 58 22 83 32 58 5 14 272 ELOPIFORMES 5 1 6 ESOCIFORMES 1 1 GADIFORMES 23 2 1 26 GASTEROSTEIFORMES 4 2 1 1 8 GOBIESOCIFORMES 8 8 1 17 GONORYNCHIFORMES 12 4 1 17 GYMNOTIFORMES 2 2 LOPHIIFORMES 5 1 1 7 MUGILIFORMES 4 1 5 OPHIDIIFORMES 7 1 10 18 OSMERIFORMES 20 4 11 4 2 1 42 OSTEOGLOSSIFORMES 40 6 16 5 67 PERCIFORMES 649 98 362 144 114 8 1379 PERCOPSIFORMES 3 1 4 PLEURONECTIFORMES 27 2 1 30 POLYPTERIFORMES 1 1 2 SALMONIFORMES 18 2 34 15 11 1 13 94 SCORPAENIFORMES 39 1 10 3 2 1 56 SILURIFORMES 337 39 74 20 48 3 521 STOMIIFORMES 2 2 SYNBRANCHIFORMES 19 2 6 4 31 SYNGNATHIFORMES 41 3 12 1 1 58 TETRAODONTIFORMES 15 5 20 ZEIFORMES 1 1 Grand Total 2094 312 1058 400 517 6 65 4462 2

www.iucnredlist.org 3

North American Fish Extinctions Chasmistes muriei (Snake River Sucker) Coregonus alpenae (Longjaw Cisco) Coregonus johannae (Deepwater Cisco) Coregonus nigripinnis (Blackfin Cisco) Cottus echinatus (Utah Lake Sculpin) Empetrichthys merriami (Ash Meadows Poolfish) Etheostoma sellare (Maryland Darter) Fundulus albolineatus (Whiteline Topminnow) Gambusia amistadensis (Amistad Gambusia) Gambusia georgei (San Marcos Gambusia) Gila crassicauda (Thicktail Chub) Lepidomeda altivelis (Pahranagat Spinedace) Moxostoma lacerum (Harelip Sucker) Notropis orca (Phantom Shiner) Pogonichthys ciscoides (Clear Lake Splittail) Rhinichthys deaconi (Las Vegas Dace) Salvelinus agassizii (Silver Trout) Pressures on Fishes 4

Pressures on Fishes Pressures on Fishes 5

Pressures on Fishes Pressures on Fishes Clear cutting impacts Increased sediment input, bank erosion Increased solar input, temperature Increase variability in hydrograph (faster, higher floods and more frequent droughts) 6

Clear Cutting and Water Quality Clear Cutting and Water Quality 7

Pressures on Fishes Pressures on Fishes - Fishing Select fisheries have already collapsed Predictions are that all will collapse within 50 years Why? 8

Pressures on Fishes - Fishing Fishing Down Marine Food Webs. 1998. Daniel Pauly; Villy Christensen; Johanne Dalsgaard; Rainer Froese; Francisco Torres Jr. Science, Vol. 279, No. 5352., 860-863. Endangered Megafauna 9

Of the worlds 20 largest freshwater fishes, 17 (18) are endangered due in part to overharvest. Fishery Pressure Black Sea Example 10

Fishery Reserves 11

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