Presence of sexual dimorphism between Muscovy ducks (Cairina moschata) in the backyard of three communities in Guatemala
Gonzáles, Mario E.
Folgar, Ana M.
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In this study, we investigated the sexual dimorphism between males and females of Muscovy ducks freely bred in three diﬀerent communities in Guatemala. The analysis was based on 14 important morphological features: wing length, rear limb length, dorsal elevation, head length and head width, longitudinal and bicostal diameter, eternal back length, rump height, chest perimeters and perimeter of the metatarsal and body weight. A sample consisting of 137 males and 225 females. Males had a higher mass than females but were less robust and legs. The discriminatory analysis revealed that males could not be grouped together, but Camotan's females are diﬀerent from the rest. Detailed analysis showed that most of the diﬀerential variables (abdominal and chest perimeters) were not related to ethnological traits, so the Camotán group can be considered as a mere prototype (associated with selection and artifcial reproduction), not an ecotype (as if what makes ecotypes adaptive to local conditions, this is not the case). The results of this study could be eﬀective in characterizing and preserving the genetic resources of Muscovy Duck in Guatemala. It is now necessary to study the quality of the carcasses and egg and other variations at the molecular level that will further clarify the similarity with ducks of other origins to register this breed internationally.