Seed Predation of Copaifera langsdorffii Desf. (Fabaceae: Caesalpinioideae) by Rhinochenus brevicollis Chevrolat (Coleoptera: Curculionidae) in a Brazilian Cerrado Fragment

Marcílio Fagundes; Maria L.B. Maia; Antônio C.M. Queiroz; G.W. Fernandes; Fernanda V. Costa

doi:10.25260/EA.13.23.3.0.1174

Autores/as

Marcílio Fagundes State University of Montes Claros, General Biology Department, Laboratory of Conservation Biology, Montes Claros, Minas Gerais, Brazil. Marcílio Fagundes.
Maria L.B. Maia State University of Montes Claros, General Biology Department, Laboratory of Conservation Biology, Montes Claros, Minas Gerais, Brazil. Marcílio Fagundes.
Antônio C.M. Queiroz State University of Montes Claros, General Biology Department, Laboratory of Conservation Biology, Montes Claros, Minas Gerais, Brazil. Marcílio Fagundes.
G.W. Fernandes Federal University of Minas Gerais, General Biology Department, Laboratory of Insect Ecology, Belo Horizonte, Minas Gerais, Brazil.
Fernanda V. Costa State University of Montes Claros, General Biology Department, Laboratory of Conservation Biology, Montes Claros, Minas Gerais, Brazil. Marcílio Fagundes.

DOI:

https://doi.org/10.25260/EA.13.23.3.0.1174

Palabras clave:

arquitetura da planta, concentração do recurso, fenologia, frutificação supra anual, saciação de predadores

Resumen

Insetos predadores de sementes geralmente são herbívoros especializados que podem ser afetados por características da planta hospedeira. Neste estudo, a predação das sementes de Copaifera langsdorffii por Rhynochenus brevicollis foi caracterizada testando-se as hipóteses da concentração do recurso e da arquitetura da planta. O estudo foi realizado em um fragmento de cerrado localizado no norte do estado de Minas Gerais, Brasil. A percentagem de sementes de C. langsdorffii predadas por R. brevicollis variou de 1 to 30% (média±DP, 9.31±6.41). O número de frutos por ramos afetou negativamente a percentagem de predação das sementes por R. brevicollis. A predação de sementes pelo besouro mostrou relação positiva com a circunferência do tronco das árvores, mas a altura das árvores não afetou o ataque do predador. Assim, nossos dados não apresentaram suporte real para as duas hipóteses testadas. Finalmente, o estudo discute o papel da frutificação supra-anual na regulação da população de R. brevicollis.

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