Ticket #5941 (new)

Opened 4 days ago

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Reported by: "FedEx Opinion Requested" <FedExOpinionRequested@…> Owned by:
Priority: normal Milestone: 2.11
Component: none Version: 3.8.0
Severity: medium Keywords:
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gest factors that leads to the development of sexual dimorphism in shorebirds is sexual selection. Males with ideal characteristics favored by females are more likely to reproduce and pass on their genetic information to their offspring better than the males who lack such characteristics. Mentioned earlier, male shorebirds are typically larger in size compared to their female counterparts. Competition between males tends to lead to sexual selection toward larger males and as a result, an increase in dimorphism. Bigger males tend to have greater access (and appeal) to female mates because their larger size aids them in defeating other competitors. Likewise, if the species exhibits gender role reversal (where males take on roles traditionally done by females such as childcare and feeding), then males will select female mates based on traits that are the most appealing. In the Jacana species, females compete with each other for access to male mates, so females are larger in size. Males 
 choose female mates based on who presents herself as the strongest and who 'owns' the most territory.
Natural selection
Another factor that leads to the development of dimorphisms in species is natural selection. Natural selection focuses on traits and the environment's response to the traits in question; if the said trait increases the overall fitness of the individual possessing it, then it will be 'selected' and eventually become a permanent part of the population's gene pool. For example, depending on the food available in a shorebird specie's respective niche, bigger bill sizes may be favored in all individuals. This would essentially lead to monomorphism within the species but is subject to change once sex

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