Composition of the diet of Netta peposaca (Birds: Anseriformes) in Santa Fe province, Argentina

We examined the diet of the Rosy-billed Pochard, Netta peposaca (Vieillot, 1816), (n = 59) during the autumn of 2010 in Santa Fe province, Argentina. Were analyzed a total of 59 ducks (n = 37 females and n = 22 males) to assess their gastrointestinal contents. The trophic spectrum was composed of 16 taxa (plant fraction: animal fraction 9 and 7). The contribution of each food category estimated using the IRI was: Echynochloa sp. (Poaceae) = 4301, Polygonum sp. (Polygonaceae) = 956, and unidentified graminoid species = 53 (females: Echynochloa sp. = 4313, Polygonum sp. = 1095 and males: Echynochloa sp. = 5522, Polygonum sp. = 814). No significant differences were found between females and males in diet composition (Fisher's test, p < 0.05). Moreover, the diversity index (H') was significantly (Mann-Whitney, p < 0.05) different between sexes. The Rosy-billed Pochard showed a predominantly phytophagous feeding habit in autumn. Likewise, this is the first contribution on the sexual differences in the feeding biology of the Rosy-billed Pochard.

Bibliographic Details

Main Authors:	Olguín,Pamela F., Attademo,Andrés M., Beltzer,Adolfo H., Virgolini,Ana L. Ronchi, Lorenzón,Rodrigo, Caselli,Andrea, Arce,Sofía, Percara,Alejandro
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Zoologia 2014
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702014000100011
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