Sexual dimorphism in body shapes of the spotted barb fish, Puntius binotatus of Lake Buluan in Mindanao, Philippines
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2012, Vol 5, Issue 5
Abstract
The objective of this study is to describe differences in body shapes between sexes of the spotted barb, Puntius binotatus (Valenciennes, 1842) using landmark-based geometric morphometrics. A total of 100 fish individuals (50 per sex) collected from Lake Buluan in Mindanao were digitized using twenty landmarks. Results revealed significant variation in body shapes between the two sexes. Body shapes were more slender for males than females. Females have bigger head region, deeper body depth and shorter tail region than males. Males have also wider anal fin bases. Such dimorphic traits are believed to be outcome of selective pressures for shape differences between the sexes.
Authors and Affiliations
Emma Dorado, Mark Torres, Cesar Demayo
Keywords
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