Aulacorhynchus prasinus is a kind of toucans and usually called Emerald toucanet. In the genus aulacorhynchus, it contains seven kinds of species and in the species of prasinus which has seven different kinds of birds. They are main in Mexico, Central and South America. Most of them are living in the eastern coast of rainforest from lowland to high mountains which the range is 915m to 3050m (Gould 1834). Males and females are the color like which are all main in green, but the body size of the female is smaller than male. The range of mass is 149g to 160g and the range of length is 30cm to 33cm which is a little small in toucanet family (Gould 1834). They are all similar in their shapes of beaks. They typically eat fruits, insects, some lizards,
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First, dividing prasinus into two groups one for males and the other one for females and measure the beak size, weight and body size of those species. Second, select those birds from the same region and same genu but different species. Third, following the methods, find out the differences between these species and using those evidence to support the hypothesis, or vice versa. Base on the researches from Sexual dimorphism and foraging behavior of Emerald Toucanets Aulacorhynchus prasinus in Costa Rica (Riley et al. 2016), using the similar method as this article suggested to find out evidence for supporting the hypothesis. If the experiment rejects the null hypothesis, this means that the hypothesis is true and testable that the fitness of this species is influenced by beak sizes which larger beak size will find more food in wild and attract females more than others that are small. If the experiment does not reject the null hypothesis, this means that the hypothesis is wrong and not testable, the fitness of this species is not affected by beak sizes. Larger beak size can’t help species find more food and attract female more than smaller ones. Compare with other birds, the trait of this species is large bill size. They have large size beak might help them to have more kinds of food for surviving, comparing with other birds living in the same region but have a small beak. The sexual selection would choose larger size beak for reproduction, and under the geographic pressure and natural selection, this species adapts fitness and survive better in wild, the large beak size the result of adaptation. As mentioned in the introduction part, this species is on the edge of extinction, a small number of aulacorhynchus prasinus live in South America. From this research, it will help to find out the adaptation process of this species and find out the way to protect them in the wild or
First, dividing prasinus into two groups one for males and the other one for females and measure the beak size, weight and body size of those species. Second, select those birds from the same region and same genu but different species. Third, following the methods, find out the differences between these species and using those evidence to support the hypothesis, or vice versa. Base on the researches from Sexual dimorphism and foraging behavior of Emerald Toucanets Aulacorhynchus prasinus in Costa Rica (Riley et al. 2016), using the similar method as this article suggested to find out evidence for supporting the hypothesis. If the experiment rejects the null hypothesis, this means that the hypothesis is true and testable that the fitness of this species is influenced by beak sizes which larger beak size will find more food in wild and attract females more than others that are small. If the experiment does not reject the null hypothesis, this means that the hypothesis is wrong and not testable, the fitness of this species is not affected by beak sizes. Larger beak size can’t help species find more food and attract female more than smaller ones. Compare with other birds, the trait of this species is large bill size. They have large size beak might help them to have more kinds of food for surviving, comparing with other birds living in the same region but have a small beak. The sexual selection would choose larger size beak for reproduction, and under the geographic pressure and natural selection, this species adapts fitness and survive better in wild, the large beak size the result of adaptation. As mentioned in the introduction part, this species is on the edge of extinction, a small number of aulacorhynchus prasinus live in South America. From this research, it will help to find out the adaptation process of this species and find out the way to protect them in the wild or