Neils Carlson

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.

Downloadable Files

PowerPoint Presentation

Specimen Catalog

Video

 

Watch Video: Stained fish specimens

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Images

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    Image 7

    The head of a cleared and stained fancy female betta.                                     

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    Image 8

    A full body picture of a cleared and stained fancy female betta with scales.

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    Image 11

    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.

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    Image 12

    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)