DBIO - Departamento Biologia

URI Permanente desta comunidadehttps://repositorio.ufrn.br/handle/1/4

Navegar

Agora exibindo 1 - 2 de 2

Male and female breeding strategies in a cooperative primate
(Elsevier, 2014) Yamamoto, Maria Emilia; Araújo, Arrilton; Arruda, Maria de Fátima; Lima, Ana Karinne Moreira; Siqueira, Jose de Oliveira; Hattori, Wallisen Tadashi
Marmosets are cooperative breeders organized as extended family groups, but breeding is generallyrestricted to a single pair. Breeding competition is fierce in female marmosets; males, on the other hand,show low levels of intragroup aggression. We investigated male and female breeding strategies andthe resulting reproductive output in 9 wild groups. Reproductive output, tenure of breeding animals,identification of the breeding system, breeding position replacements, migration and infanticide wererecorded; also, we recorded grooming and aggression. Replacement of the breeding male or female wasobserved on nine occasions. On four occasions, the son of the breeding male inherited the breeding post,but we never observed inheritance of a breeding post by a daughter. Mostly, females attained a breedingpost by immigrating to a group that had a breeding vacancy. Our results showed that Callithrix jacchusmales and females use different strategies to attain a breeding position and maintain it for as long aspossible. These strategies prolong the tenure of the breeding position, which is the best way to producea large number of offspring
The effect of eavesdropping on intrasexual interaction in male fiddler crab, uca maracoani (Latreille 1802-1803, decapoda, ocypodidae)
(Springer, 2016-09-21) Santos, Luana Carla dos; Freire, Fúlvio Aurélio de Morais; Luchiari, Ana Carolina
Animal communication occurring in wide networks can involve signals sent to several receivers. The animals composing the audience may affect how individuals display during an interaction and may change the message that is sent. In this study, we investigated whether the presence of a conspecific affected the intensity of agonistic interaction between male fiddler crabs, Uca maracoani. Pairs of males of the same size were observed when in the presence of a male, a female or no crab as audience. We found that if there is a female audience, males became more aggressive and interacted the most. Also, the female audience leads to an increase in incidence of male foaming, possibly indicating predisposition for mating. If the audience was a male or if there was no audience, there was no significant difference in interaction. These results indicate that the presence of an audience affects the way male fiddler crabs interact and the type of displays they show. Therefore, the context seems to guide the fiddler crab behavior in terms of how they perform in order to send information about themselves to conspecifics

SIGAA

Navegar

Navegando DBIO - Departamento Biologia por Assunto "Aggression"