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.
Most crewed yacht charters are all inclusive, ranging from $15,000 to $50,000 per week. At Carefree Yacht Charters we will help find the perfect charter within your budget. View our cost table to learn more about crewed yacht charter costs.
Personally, for the wife and I, we budget for $50.00 a day for on the ship and $100 a day for each port. A 7 day cruise will cost us an extra $350 on the ship and $300 in the ports. Add in tips $168, plus 1 excursion $100, and one fancy dinner $100, we spend just under $1000 for everything. This budget gets me 1-2 drinks a day, Special coffee if I want one, trinkets at the port of call, one fancy dinner, 1 excursion.