Novas informações sobre a história natural da maria-da-restinga (Phylloscartes kronei) (Aves, Tyrannidae)
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Data
2010-03-12
Autores
Gussoni, Carlos Otávio Araújo [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
A maria-da-restinga (Phylloscartes kronei) é uma espécie da família Tyrannidae descrita recentemente e considerada como globalmente ameaçada de extinção, cuja história natural é pouco conhecida. Visando preencher parte desta lacuna, o objetivo deste estudo foi de caracterizar o comportamento de forrageamento da maria-da-restinga, descrever os bandos mistos aos quais ela se associa, bem como descrever alguns outros aspectos de sua história natural como seus hábitos alimentares, o comportamento de dormir, insights sobre a biologia reprodutiva, o alcance de vôo, encontros agonísticos interespecíficos e a muda. No período de agosto de 2008 a julho de 2009 foram realizadas excursões mensais ao município de Ilha Comprida (~24º S), Estado de São Paulo. Aliado ao esforço anual mencionado, uma visita ao município de Guaraqueçaba (25º18'S e 48º19'W), Estado do Paraná, foi conduzida entre os dias 25 de julho e 1º de agosto de 2008. Foram coletadas 613 amostras de forrageamento, através de observações diretas com auxílio de binóculos com aumento de 10 vezes. Durante os períodos de coleta de dados sobre o forrageamento da espécie, para cada encontro com a mesma foi anotado se esta se encontrava só, aos pares, em grupos ou associada a bandos mistos de aves. Quando em bandos mistos, foram anotadas todas as espécies ocorrentes, visando caracterizar os bandos aos quais se associa. Para a descrição do hábito alimentar da espécie foram analisados os conteúdos estomacais de cinco exemplares coletados na década de 1990 no Estado do Paraná, tendo sido identificados 116 ítens alimentares. Através da análise dos dados obtidos, conclui-se que P. kronei captura suas presas principalmente em folhas verdes, entre 0,5 e 15m acima do solo, utilizando a manobra “investir-atingir”. Alimenta-se predominantemente de artrópodes, sendo que os insetos das ordens Coleoptera...
The Restinga Tyrannulet (Phylloscartes kronei) is a recently described and globally threatened species of the family Tyrannidae, whose natural history is poorly known. In this study several information on the natural history of P. kronei were gathered such as several aspects on foraging behavior, association with mixed species bird flocks, feeding habits, the description of the roosting behavior, insights on the reproductive biology, the flying range, interespecific agonistic encounters and moulting. From August 2008 to July 2009, data on this species were collected on a monthly basis in Ilha Comprida (~24º S), São Paulo state, Brazil. In addition, a visit to Guaraqueçaba (25º18'S e 48º19'W), Paraná state, was conducted between 25 July and 01 August 2008. A total of 613 foraging maneuvers were gathered by direct observations with the aid of binoculars with 10x magnification. In all meetings with the species it was reported if individuals were alone, in pairs, in groups or associated with mixed species bird flocks. When mixed species flocks with Restinga Tyrannulets were observed, all species in the flock were identified. Five stomach contents collected in the 1990s in Paraná state were evaluated and 116 food items were identified. The Restinga Tyrannulet captures preys mainly with sally-strikes in green leaves between 0.5 and 15m above the ground. This species feeds mainly on arthropods, especially Coleoptera and Hymenoptera. The observed foraging behaviors and feeding habits were similar to the ones observed in other species of Phylloscartes, but new food items are described for this genus: Anobiidae (Coleoptera), Coccinelidae (Coleoptera), Chalcidoidea (Hymenoptera), Microhymenoptera and two species of fruits (Clusia criuva and Ternstroemia brasiliensis). P. kronei is a sporadic follower of mixed species bird flocks, which had the inclusion of 25 species on their compositions... (Complete abstract click electronic access below)
The Restinga Tyrannulet (Phylloscartes kronei) is a recently described and globally threatened species of the family Tyrannidae, whose natural history is poorly known. In this study several information on the natural history of P. kronei were gathered such as several aspects on foraging behavior, association with mixed species bird flocks, feeding habits, the description of the roosting behavior, insights on the reproductive biology, the flying range, interespecific agonistic encounters and moulting. From August 2008 to July 2009, data on this species were collected on a monthly basis in Ilha Comprida (~24º S), São Paulo state, Brazil. In addition, a visit to Guaraqueçaba (25º18'S e 48º19'W), Paraná state, was conducted between 25 July and 01 August 2008. A total of 613 foraging maneuvers were gathered by direct observations with the aid of binoculars with 10x magnification. In all meetings with the species it was reported if individuals were alone, in pairs, in groups or associated with mixed species bird flocks. When mixed species flocks with Restinga Tyrannulets were observed, all species in the flock were identified. Five stomach contents collected in the 1990s in Paraná state were evaluated and 116 food items were identified. The Restinga Tyrannulet captures preys mainly with sally-strikes in green leaves between 0.5 and 15m above the ground. This species feeds mainly on arthropods, especially Coleoptera and Hymenoptera. The observed foraging behaviors and feeding habits were similar to the ones observed in other species of Phylloscartes, but new food items are described for this genus: Anobiidae (Coleoptera), Coccinelidae (Coleoptera), Chalcidoidea (Hymenoptera), Microhymenoptera and two species of fruits (Clusia criuva and Ternstroemia brasiliensis). P. kronei is a sporadic follower of mixed species bird flocks, which had the inclusion of 25 species on their compositions... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Ave, Ornitologia, Historia natural, Habitos alimentares, Ilha Comprida (SP), Forrageamento, Bandos mistos, Foraging behavior, Mixed species bird flocks, Feeding habits, Natural history, Birds
Como citar
GUSSONI, Carlos Otávio Araújo. Novas informações sobre a história natural da maria-da-restinga (Phylloscartes kronei) (Aves, Tyrannidae). 2010. 65 f. Dissertação (mestrado) - Universidade Estadual Paulista, Instituto de Biociências de Rio Claro, 2010.