Composition of the diet of Netta peposaca (Birds: Anseriformes) in Santa Fe province, Argentina
| Autor: | Pamela F. Olguín, Andrés M. Attademo, Adolfo H. Beltzer, Ana L. Ronchi Virgolini, Rodrigo Lorenzón, Andrea Caselli, Sofía Arce, Alejandro Percara |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Zoologia (Curitiba), Vol 31, Iss 1, Pp 97-100 (2014) |
| Druh dokumentu: | article |
| ISSN: | 1984-4689 1984-4670 |
| DOI: | 10.1590/S1984-46702014000100011 |
| Popis: | 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. |
| Databáze: | Directory of Open Access Journals |
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