BIOL 3130 Lecture Notes - Lecture 7: Asian Carp, Gene Flow, Peripatric Speciation
27 Oct 2017
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Document Summary
Case study: invasive asian carps in 3 great lakes. Asian carp species poise threat in taking over native species habitat and food. Grass carps survives on vegetation that provides habitats and breeding grounds for local fish. Initially introduced to stabilize weed growth in waterways. A push and pull between: polymorphs and heterozygosity: too little gene flow and inbreeding depression (e. g. loss of, too much preventing local specialization and (cid:494)outbreeding depression(cid:495) Don(cid:495)t need a lot of gene flow to maintain connections. Gene flow can make it hard for species to populate. Key message: even small amounts of gene flow will effect/reduce isolation of. Really hard to be isolated and avoid gene flow subpopulations, and thus rates of speciation (complete isolation may be harder than we think) 1: thus, the larger area covered by a species(cid:495) range, the less chance that range will suffer permanent or temporary obliteration.
