Sexual Dimorphism in Feeding Behavior of Bettas (Betta splendens)
Betta splendens, also known as Siamese Fighting fish, are a popular aquarium fish known for their aggression. Many studies have focused on the aggressive displays by Betta splendens towards conspecifics, but few have examined their sexual dimorphism. It was noticed that in addition to the obvious external physical, sexual dimorphism, there is a sexual discrepancy in feeding behavior. In order to determine wether the sexual, behavioral dimorphism is the cause of a purely behavioral difference or if it is grounded in a sexual, morphological dimorphism, 55 Betta splendens specimens were differentially cleared and stained and subsequently photographed. The photographs will be used to take morphological measurements and those will then be used in several models to determine theoretical suction and bite forces.
Watch Video: Stained fish specimens
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The head of a betta native to the wetlands of Thailand with a dissection to show the A1 and A2 muscles with the mouth closed.
The head of a betta native to the wetlands of Thailand with a dissection
to show the A1 and A2 muscles with the mouth open. (The black wedge in
its mouth is there to keep it open)