Produção Nacional
Alguns dados sobre a reprodução do garibáldi, Agelaius r. ruficapillus (Icteridae, Aves) em lavouras de arroz no Rio Grande do Sul
1987; Sociedade Brasileira de Zoologia; Volume: 4; Issue: 4 Linguagem: Inglês
10.1590/s0101-81751987000400003
ISSN1806-969X
Autores Tópico(s)Environmental and biological studies
ResumoAgelaius r. ruficapillus is gregarious, being found in large flocks in Rio Grande do Sul during most of the year; they nest in natural marshes or rice fields.This bird is accused by farmers ofcausing damage to rice at ali stages of its growth and Belton, 1985, be/ieves it may now be the most abundant bird in the state.Its reproductive biology in rice fields in southem Rio Grande do Sul was observed from 1981 to 1983, with more emphasis from november 1982 to march 1983.Capture and banding of 16 birds with aluminum and plastic colored bands were made; nine nests were marked with steel stakes.It was found that the male is responsible for the construction of the nest, which the female /ines inside.The clutch varies from three to four eggs, three being more frequento The female broods the eggs and leaves the nest to feed.The male stays near the nest, defending the territory.The young hatch after 13 days of brooding, and arefed arthropods by the parents.After fledging they receive grains ofdehulled rice.Reproduction is synchronized with rice growth.It begins with flowering and ends at harvest time.Adult birdsfeed on rice during the entire growth period, taking the "milk" of green rice and eating ripe grains after dehulling them.
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