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| Olguín,Pamela F.; Attademo,Andrés M.; Beltzer,Adolfo H.; Virgolini,Ana L. Ronchi; Lorenzón,Rodrigo; Caselli,Andrea; Arce,Sofía; Percara,Alejandro. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stomach contents analysis; Rosy-billed Pochard; Trophic composition. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702014000100011 |
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| Leon,Evelina; Peltzer,Paola M.; Lorenzon,Rodrigo; Lajmanovich,Rafael C.; Beltzer,Adolfo H.. |
| ABSTRACT Increased anthropogenic-made sounds such as traffic noises contribute to acoustic pollution, which produces deleterious effect on song-vertebrates. We compared the advertisement call of Scinax nasicus (Cope, 1862) males in natural (as a reference or control, Site A) and Sites affected by traffic noises (Site B). Call structure was recorded and it was amplified in sonograms (software Raven Pro 1.5). Seven variables were measured on its advertisement call: duration (s), number of notes, number of pulses per note, maximum and minimum frequency (kHz), dominant frequency (kHz) and amplitude (dB). In addition, at each Site the background noise (the fundamental frequency, F0 and amplitude, dB) was measured. The amplitude of background noise reached... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibians; Vocalization; Vocal adjust; Hylidae. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212019000100207 |
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