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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Now, cabins with balconies on a standard, seven-day cruise generally cost $100 more than those with a window, and between $150 and $200 more than a stateroom inside the ship. If you're sailing in the Mediterranean or to another scenic destination, the view is definitely worth the money, Driscoll says.