MACNBR   00242
MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Collective Action and Male Affiliation in Black and Gold Howler Monkeys (Alouatta caraya) in northern Argentina.
Autor/es:
GARBER, PAUL A; KOWALEWSKI, M MARTIN
Lugar:
Allendale, Mi, USA
Reunión:
Jornada; Sixth Midwest Primate Interest Group (MPIG) Meeting; 2009
Institución organizadora:
Midwest Primate Interest Group (MPIG)
Resumen:
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There exists a growing body of evidence that
increased fitness benefits accrue to individual males and individual females
that reside in a functioning, stable, and affiliative social group. This results from the fact that social
animals commonly encounter situations in which the collective actions of
several individuals can provide benefits to each. In this study we present data based on a 21
month field investigation of within-group social tolerance and collective
action in male black and gold howler (Alouatta
caraya) monkeys residing in two mulitmale-multifemale social groups. Our results indicate that resident male A. caraya are highly tolerant of each
other across a range of contexts including feeding, foraging, resting, and
mating. Males are often each others nearest neighbor, engage in bouts of
intrasexual grooming and embracing, and act jointly in excluding extragroup
males and neighboring males from the vicinity of the group. On average, males invested almost 2 hours
per day in intergroup encounters (Group X: 117.1 ± 94.4 minutes; Group G: 117.8
± 94.2 minutes). Intergroup encounters were characterized by co-operative adult
male boarder vigilance (56%), howling (41%), and fighting (3%). During these
encounters an average of 3 resident males acted collectively to expel intruder
males from the group and to interfere with mating activities between
nonresident males and resident females.
We conclude that concepts of reciprocity and mutualisms are central to
an understanding of collective action among male black and gold howler monkeys
(Alouatta caraya). Collective action
enhances group cohesion and the benefits that individuals receive by
maintaining coordinated, strong and predictable social bonds.