Galapagos Finch Evolution
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Others curved up or down like crossed sickles” (Joling). This beak deformity is known as Avian Keratin Disorder (AKD), and as the name suggests, there is a problem with the keratin in the beak. Joling’s article was based off the original article and study done by Maxine Zylberberg and other colleagues. The study they did was very extensive and carried a lot of components to it. They were unsuccessful in a lot of their trials, and had to
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Mutation did occur in some of the rounds we did in the experiment by having more birds with longer beaks and smaller ones decreasing dramatically. But eventually birds with smaller beaks will adapt to another environment and as for long beak birds they will have to challenge one another to fight for food and probably over time have a hard time searching for food. But it wasn’t natural selection that changed the beak size of the birds it was basically a mutation that was passed on to their
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There are a least 14 species of Darwin’s finches that have developed over millions of years. When Darwin encountered the finches on the Galapagos Islands he noticed the diversity of the Finches beaks and size compared to each other. In Figure 1 you can see this. The diet of nuts and berries that the finches had access to on the island is greatly related to the size and function of the finches beaks (Grant, 2003). The larger beaked birds fed off of hard shelled nuts, while the smaller beaked birds fed off of smaller seeds and nectar from plants.
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