The Abaco Islands. The Abaco Islands consists of several islands and cays (very small islands) that are great for exploring and snorkeling. Andros Island is the Bahamas' largest island but it's also the least developed. Like other Out Islands, Andros Island is ideal for eco-travelers.
bottleneck (bÅt'l-nÄk') An abrupt and severe reduction in the number of individuals during the history of a species, resulting in the loss of diversity from the gene pool. The generations following the bottleneck are more genetically homogenous than would otherwise be expected. Bottlenecks often occur in consequence of a catastrophic event.
Examples of the Bottleneck Effect. Let's take a look at some examples of the bottleneck effect in nature. Northern elephant seals were hunted until their population was reduced to 20 individuals by the end of the 19th century. They were saved from extinction, and their population is now around 30,000.