BIOC63H3 Lecture Notes - Lecture 5: Cincinnati Zoo And Botanical Garden, Trophy Hunting, Passenger Pigeon
18 Nov 2013
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Bioc63fall2013 lecture 5 notes: threats to biodiversity i. Global main threats to biodiversity: biggest affect of drivers is on land use changing natural landscape via deforestation, fragmentation etc, and biotic exchange invasive species. Wilson no species is abundant enough to be immune to extinction first declines occurred by 1860 scattered birds could not breed captive breeding failed last bird died in cincinnati zoo sep 14, 1914 (her name was martha) Sustainable exploitation of wild species: conditions, keep captive communities, regulate on reserve, set capture limits (control, hunt fraction of population only adults, maintain genetic diversity. 1: avoid exploiting species that are already threatened, habitat preservation, temporal control (only hunt at specific times, 1. Exploitation rate must be smaller than replenishment rate: 2. in roder for the population ro remain above minimal population size, 3. No permanent alteration of size distribution, age structure or sex ratios: 5. retention of social behavior*
