Territorial and reproductive behaviour of a new species of Hylodes (Amphibia, Anura, Bufonidae) from the Atlantic Forest of Southeast Brazil. / Comportamento Territorial e Reprodutivo de Uma Nova Espécie de Hylodes (Amphibia, Anura, Leptodactylidae) da Mata Atlântica do Sudeste do Brasil.
AUTOR(ES)
Patricia Narvaes
DATA DE PUBLICAÇÃO
1997
RESUMO
Hylodes sp.n. is a small-sized steam-dweller leptodactylid frog of the Atlantic Rain Forest of Southeast Brazil. Males and females are found together in the same habitat throughout the year and they have prolonged breeding periods. Males have two types of vocalization: the advertisement call, a long high-pitched whistled trill and the encounter call, composed by individual notes irregulary partially pulsed. Males and females have site fidelity and remain in the same home-range for at least 12 months. Home range size ranged from 0.45 to 7.98 m2 to females (x = 2.74; SD = 1.89; n = 24) and from 0.12 to 13.13 m2 to males (x = 3.03; SD= 3.16; n = 44). Males stablish territories and atract females using the advertisement call and some visual displays. In one of them, the male raise one hind leg and extend it slowly out of back in an arc to about 45º and then returned it to its side; in other, the male wiggle the toes of one or both hind feet slowly without otherwise moving the legs. The courtship usually begins with the female entering a maless territory, approaching the resident. Males have elaborate visual courtship displays and complex courtship interactons involve visual and tactile cues as well as vocalizations. The male leads the female to the oviposition site inside his territory; the movement of the pair to the nest may be interrupted by bouts of tactile courtship. Amplexus should happen under water in the nest. Females leaves nest after ovipositon takes place and turn back to their home range; males stay around calling and diving into the nest. Mean clutch size was 46 eggs (SD = 7,92; n = 13).
ASSUNTO(S)
territoriality hylodes hylodes atlantic forest reprodução mata atlântica reproduction southeast brazil territorialidade
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