This article is a good article explaining how the founder effects affect genetic drift. An example of a bottleneck effect: Northern elephant seals have reduced genetic variation most likely due to being hunted. Hunting reduced their population size to as few as 20 individuals at the end if the 19th century.
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An 11-night stay-and-sail holiday, departing on February 12 2015, with four nights in a four-star hotel in Havana costs from Â£2,439pp including return flight and transfers.â. Reader offer: Cruise Cuba on the SPV Star Flyer from Â£3,199 per person, including return flight, excursions and meals. Departs March 2015.