INVESTIGADORES
BRAVO Susana Patricia
artículos
Título:
Foraging behavior and activity patterns of black howler monkeys inhabiting in flooded forest of the Paraná River, Argentina.
Autor/es:
BRAVO, S. P.; SALLENAVE, A.
Revista:
INTERNATIONAL JOURNAL OF PRIMATOLOGY
Editorial:
SPRINGER/PLENUM PUBLISHERS
Referencias:
Año: 2003 vol. 54 p. 825 - 846
ISSN:
0164-0291
Resumen:
Howling monkeys (Alouatta spp.) are colonizer species, showing a plasticity
in behavior that allows them to inhabit different sorts of forests. There is a
series of hypotheses relating demography to behavioral and ecological characteristics
of howlers: (1) as howler density increases, home range size will
decrease; (2) howler groups occupying small home ranges will have a high
proportion of leaves in their diet; and, (3) the proportion of mature leaves in
the diet is negatively correlated with group daily travel distance. To test hypotheses
about howler diet and ranging pattern in relation to food resources,
we studied the foraging ecology and general activity patterns of 2 groups of
black howlers (Alouatta caraya) inhabiting in flooded forest of Paran´a River
(Argentina), the habitat with the highest density recorded for Alouatta. We
found, in addition to the highest densities, also the smallest home ranges for
Alouatta (Group I: 1.7 ha and Group II: 2.2 ha). However, diet was not dominated
by leaves, and high quality itemsflowers, fruits, new leaveswere a
high proportion of the diet all year. Also, daily travel distance is not correlated
with the proportion of mature leaves in the diet, but is positively correlated
with the number of group confrontations. Finally, we propose a model integrating
and interpreting our results as a function of the spatial and temporal
distribution of high quality food resources in the Argentinean flooded forest.
(Argentina), the habitat with the highest density recorded for Alouatta. We
found, in addition to the highest densities, also the smallest home ranges for
Alouatta (Group I: 1.7 ha and Group II: 2.2 ha). However, diet was not dominated
by leaves, and high quality itemsflowers, fruits, new leaveswere a
high proportion of the diet all year. Also, daily travel distance is not correlated
with the proportion of mature leaves in the diet, but is positively correlated
with the number of group confrontations. Finally, we propose a model integrating
and interpreting our results as a function of the spatial and temporal
distribution of high quality food resources in the Argentinean flooded forest.
in behavior that allows them to inhabit different sorts of forests. There is a
series of hypotheses relating demography to behavioral and ecological characteristics
of howlers: (1) as howler density increases, home range size will
decrease; (2) howler groups occupying small home ranges will have a high
proportion of leaves in their diet; and, (3) the proportion of mature leaves in
the diet is negatively correlated with group daily travel distance. To test hypotheses
about howler diet and ranging pattern in relation to food resources,
we studied the foraging ecology and general activity patterns of 2 groups of
black howlers (Alouatta caraya) inhabiting in flooded forest of Paran´a River
(Argentina), the habitat with the highest density recorded for Alouatta. We
found, in addition to the highest densities, also the smallest home ranges for
Alouatta (Group I: 1.7 ha and Group II: 2.2 ha). However, diet was not dominated
by leaves, and high quality itemsflowers, fruits, new leaveswere a
high proportion of the diet all year. Also, daily travel distance is not correlated
with the proportion of mature leaves in the diet, but is positively correlated
with the number of group confrontations. Finally, we propose a model integrating
and interpreting our results as a function of the spatial and temporal
distribution of high quality food resources in the Argentinean flooded forest.
(Argentina), the habitat with the highest density recorded for Alouatta. We
found, in addition to the highest densities, also the smallest home ranges for
Alouatta (Group I: 1.7 ha and Group II: 2.2 ha). However, diet was not dominated
by leaves, and high quality itemsflowers, fruits, new leaveswere a
high proportion of the diet all year. Also, daily travel distance is not correlated
with the proportion of mature leaves in the diet, but is positively correlated
with the number of group confrontations. Finally, we propose a model integrating
and interpreting our results as a function of the spatial and temporal
distribution of high quality food resources in the Argentinean flooded forest.
Alouatta spp.) are colonizer species, showing a plasticity
in behavior that allows them to inhabit different sorts of forests. There is a
series of hypotheses relating demography to behavioral and ecological characteristics
of howlers: (1) as howler density increases, home range size will
decrease; (2) howler groups occupying small home ranges will have a high
proportion of leaves in their diet; and, (3) the proportion of mature leaves in
the diet is negatively correlated with group daily travel distance. To test hypotheses
about howler diet and ranging pattern in relation to food resources,
we studied the foraging ecology and general activity patterns of 2 groups of
black howlers (Alouatta caraya) inhabiting in flooded forest of Paran´a River
(Argentina), the habitat with the highest density recorded for Alouatta. We
found, in addition to the highest densities, also the smallest home ranges for
Alouatta (Group I: 1.7 ha and Group II: 2.2 ha). However, diet was not dominated
by leaves, and high quality itemsflowers, fruits, new leaveswere a
high proportion of the diet all year. Also, daily travel distance is not correlated
with the proportion of mature leaves in the diet, but is positively correlated
with the number of group confrontations. Finally, we propose a model integrating
and interpreting our results as a function of the spatial and temporal
distribution of high quality food resources in the Argentinean flooded forest.
(Argentina), the habitat with the highest density recorded for Alouatta. We
found, in addition to the highest densities, also the smallest home ranges for
Alouatta (Group I: 1.7 ha and Group II: 2.2 ha). However, diet was not dominated
by leaves, and high quality itemsflowers, fruits, new leaveswere a
high proportion of the diet all year. Also, daily travel distance is not correlated
with the proportion of mature leaves in the diet, but is positively correlated
with the number of group confrontations. Finally, we propose a model integrating
and interpreting our results as a function of the spatial and temporal
distribution of high quality food resources in the Argentinean flooded forest.
Alouatta caraya) inhabiting in flooded forest of Paran´a River
(Argentina), the habitat with the highest density recorded for Alouatta. We
found, in addition to the highest densities, also the smallest home ranges for
Alouatta (Group I: 1.7 ha and Group II: 2.2 ha). However, diet was not dominated
by leaves, and high quality itemsflowers, fruits, new leaveswere a
high proportion of the diet all year. Also, daily travel distance is not correlated
with the proportion of mature leaves in the diet, but is positively correlated
with the number of group confrontations. Finally, we propose a model integrating
and interpreting our results as a function of the spatial and temporal
distribution of high quality food resources in the Argentinean flooded forest.