INVESTIGADORES
KOWALEWSKI Miguel Martin
congresos y reuniones científicas
Título:
Reproductive competition and ambush behaviors in black and gold howler monkeys
Autor/es:
KOWALEWSKI, M MARTIN; GARBER, PAUL A; PEKER, SILVANA M; ZUNINO, GABRIEL E
Lugar:
Columbus, OH, USA
Reunión:
Congreso; The 77th Annual Meeting of the American Association of Physical Anthropologists; 2008
Institución organizadora:
American Association of Physical Anthropologists
Resumen:
<!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;
mso-font-charset:0;
mso-generic-font-family:roman;
mso-font-pitch:variable;
mso-font-signature:-1610611985 1107304683 0 0 159 0;}
@font-face
{font-family:TimesNewRomanPSMT;
panose-1:0 0 0 0 0 0 0 0 0 0;
mso-font-charset:0;
mso-generic-font-family:roman;
mso-font-format:other;
mso-font-pitch:auto;
mso-font-signature:3 0 0 0 1 0;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{mso-style-unhide:no;
mso-style-qformat:yes;
mso-style-parent:"";
margin:0in;
margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:12.0pt;
font-family:"Times New Roman","serif";
mso-fareast-font-family:"Times New Roman";}
.MsoChpDefault
{mso-style-type:export-only;
mso-default-props:yes;
font-size:10.0pt;
mso-ansi-font-size:10.0pt;
mso-bidi-font-size:10.0pt;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;
mso-header-margin:.5in;
mso-footer-margin:.5in;
mso-paper-source:0;}
div.Section1
{page:Section1;}
-->
For most howlers species the maximum
number of adult males and adult females residing in the same social group
appears to be phylogenetically constrained. This constraint in howler sociality
and social intolerance is likely related to reproductive competition. In this
study we report 8 cases of ambush behavior in Alouatta caraya. This behavior was expressed when peripheral lonely
males or females tried to enter in an established group. During this behavioral
context either males or females chase, surprise and attack aggressively
intruder individuals of the same sex. The study was concentrated in two groups
of black and gold howlers that live in a continuous flooded forest on Brasilera Island
(27º 20' S and 58º 40' W), in northern Argentina. These two multimale
groups were followed from May 2003 to November 2004 and from September 2005 to
September 2006, 5 day-month from sunrise to sunset. In 6 out of the 8 cases, the defenders acted
coordinately expelling intruders. This behavior may be indicating a strong
reproductive competition that makes difficult for peripheral individuals to
enter into established groups. In this regard, the eviction of the intruders may
result in coordinated and co-operative behaviors that enhance within-group
social bonding. Therefore, strong reproductive competition among males and
among females may result in co-operative and social bonds between same-sex
individuals that promote stability in multimale-multifemale social groups. Funded by The Leakey Foundation,
The Wenner- Gren Foundation, American Association of Primatologists, University of Illinois, and Ideawild Inc.