Internship Report_Amber Beerman

نویسنده

Amber Beerman

چکیده

The river dolphin or bufeo (Inia boliviensis) is an endemic cetacean of the upper Madeira River basin inBolivia; nevertheless there are few biological studies on this species. This report presents the first record ofthe diet of an individual juvenile bufeo within its distribution. In two rivers of the upper Madeira river basin inBolivia during the rising water season, a newborn and a juvenile bufeo were found dead. The standardizednecropsy suggests that both deaths were caused by fishing nets. The juvenile has the caudal fin removedprobably caused by a machete; while the newborn did not present any sign of violence, and the stomachcontent was only milk. For the juvenile at least 12 individuals from four fish families (Characidae:Tetragonopterinae; Auchenipteridae; Heptapteridae and Doradidae) are consumed; highlighting theDoradidae family and small Charasidae. None of the fish are commercial species and are not consumedby humans. Therefore, we consider that both bufeos did not have direct interaction with the nets and dueto lack of experience probably were accidentally entangled while chasing fish, and were killed by drowning(as the newborn), or sacrificed by fishermen. These events are widely reported in the literature and theyare one of the factors that threaten the survival of this species.

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منابع مشابه

Herman Beerman.

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