Data/hora: 08/06/2024 20:37:34

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 16/12/2016
Data da última atualização: | 21/12/2016
Autoria: | RIBAS, C.; CUNHA, H. A.; DAMASCENO, G.; MAGNUSSON, W. E.; SOLÉ-CAVA, A.; MOURAO, G.
Afiliação: | CAROLINA RIBAS, INSTITUTO NACIONAL DE PESQUISAS DA AMAZÔNIA-INPA; HAYDÉE A. CUNHA, UNIVERSIDADE FEDERAL DO RIO DE JANEIRO; GABRIEL DAMASCENO; WILLIAM E. MAGNUSSON, INSTITUTO NACIONAL DE PESQUISAS DA AMAZÔNIA-INPA; ANTONIO SOLÉ-CAVA, UNIVERSIDADE FEDERAL DO RIO DE JANEIRO; GUILHERME DE MIRANDA MOURAO, CPAP.
Título: | More than meets the eye: kinship and social organization in giant otters (Pteronura brasiliensis).
Ano de publicação: | 2016
Fonte/Imprenta: | Behavioral Ecology Sociobiology, v. 70, n.1, p. 61-72, 2016.
DOI: | 10.1007/s00265-015-2025-7
Idioma: | Português

Conteúdo:

Giant otters live in highly cooperative groups. Behavioral observations suggest that groups are composed of a dominant reproductive pair and their offspring of previous years. We combined genetic data and long-term ecological information to determine genetic relatedness within and between groups to verify that hypothesis. We genotyped 12 polymorphic loci of 50 otters from 13 groups and two transient individuals. The average relatedness within groups (r=0.23) was high, but the degree of relatedness varied within the groups, including groups of unrelated individuals, contradicting the current social hypothesis of an exclusively parentbrood model. Negative correlations between kinship and distance between territories were higher in females, and on two
occasions, dominant females were replaced by related subordinates of the same group. Solitary transients were males, suggesting a tendency of male-biased dispersal. These data, combined with long-term ecological and behavioral information, indicate that direct benefits, such as alloparental care, and acquisition, inheritance, and defense of high-quality territories may drive the evolution of group living of this endangered social carnivore.

Palavras-Chave: | Ariranha.
Thesagro: | Comportamento animal; Lontra.
Thesaurus Nal: | Animal behavior; Mustelidae; Pteronura brasiliensis.
Categoria do assunto: | L Ciência Animal e Produtos de Origem Animal
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (59836-1) - UPC - SP - PP - SP18387 -  - 18387 - DIS