Winter diet of Great Pampa-finches Embernagra platensis in Guamini Lagoon, Argentina

• Autorzy: Montalti D , Ferman L M , Camperi A R , Soave G E , Arambarri A M , Darrieu C A

Warianty tytułu

PL

Zimowy pokarm pampasowki szarolicej w Guamini Lagoon, Argentyna

• Języki publikacji: EN

Abstrakty

EN

The diet of the Great Pampa-finch includes seeds rather than insects. Our objective was to study its diet during the winter season and, whenever possible, to record differences between the sexes in diet patterns. This species was studied at Guaminí Lagoon, Buenos Aires Province, Argentina. The stomach content of 38 adult birds was investigated. The analysis shows that the food eaten by E. platensis consisted of seeds (60%) (Chenopodiaceae, Asteraceae, Ciperaceae and Poaceae) and insects (39%) (Bellostomatidae, Dytiscidae, Curculionidae, Coccinelidae, Formicidae and Apidae). Males ate more insects and, overall, more items than females. These, in turn, consumed a greater amount of plants. Niche breadth values were 2.9 for males and 3.1 for females. The seeds encountered were those of plant species typically associated with the pampas.

PL

Pampasówka szarolica żywi się głównie pokarmem roślinnym, przede wszystkim nasionami. Celem badań było oszacowanie składu pokarmu tego gatunku w okresie zimowym, a także znalezienie ewentualnych różnic między płciami. Zbadano zawartość 38 żołądków dorosłych ptaków. 60% ich zawartości stanowiły nasiona (Chenopodiaceae, Asteraceae, Ciperaceae i Poaceae, Tab. 1) a 39% — owady (Bellostomatidae, Dytiscidae, Curculionidae, Coccinelidae, Formicidae i Apidae, Tab. 2). W pokarmie samców stwierdzono więcej owadów, samice w większym stopniu żywiły się pokarmem roślinnym, jednak różnice nie były istotne statystycznie (Tab. 3).

Słowa kluczowe

EN

ornithology; sex differentiation; stomach content; seed; winter diet; diet; bird; plant species; Guamini Lagoon; pampas; male; Embernagra platensis; insect; female; Argentina; Great Pampa-finch breed

• Wydawca: -
• Czasopismo: Acta Ornithologica
• Rocznik: 2005
• Tom: 40
• Numer: 1
• Opis fizyczny: p.79-82,ref

Twórcy

autor

Montalti D

• Department of Ornithology, Faculty of Natural Sciences and Museum, Paseo del Bosque, B1900FWA-La Plata, Argentina

autor

Ferman L M

• Department of Ornithology, Faculty of Natural Sciences and Museum, Paseo del Bosque, B1900FWA-La Plata, Argentina

autor

Camperi A R

• Department of Ornithology, Faculty of Natural Sciences and Museum, Paseo del Bosque, B1900FWA-La Plata, Argentina

autor

Soave G E

• Department of Ornithology, Faculty of Natural Sciences and Museum, Paseo del Bosque, B1900FWA-La Plata, Argentina

autor

Arambarri A M

• Department of Vegetal Morphology, Faculty of Agraian and Forestry Sciences, National University of La Plata, Av. 60 y 119, 1900-La Plata, Argentina

autor

Darrieu C A

• Department of Ornithology, Faculty of Natural Sciences and Museum, Paseo del Bosque, B1900FWA-La Plata, Argentina

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