A utilização da paisagem fragmentada por mamíferos de médio e grande porte e sua relação com a massa corporal na região do entorno de Aruanã, Goiás
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Data
2009-02-25
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Universidade Federal de Goiás
Resumo
The species are behaving differently to the process of fragmentation and this behavior
will depend on the relationship between behavioral, morphological and ecological traits
with the physical attributes of the landscape. The body size is a major ecological factors
and some links are made between the size and dispersal ability, capacity for perception
of the environment and likelihood of occurrence. In this way, the objective was evaluate
as is the distribution of mammals in fragmented landscape of Aruanã, Goiás, Brazil
testing the following hypotheses: 1) Fragments larger and less isolated have high
species richness, 2) species of greater body mass are less affected by fragmentation due
to greater dispersal ability; 3) species of greater body mass are distributed more
homogeneous in the landscape. We recorded 19 species of mammals, the area but not
isolation, was a significant predictor to explain variation in species richness of
mammals with larger areas being richer than smaller areas. Large species like jaguar
and puma, red brocket deer and gray brocket deer, collared peccary, ocelot and agouti
were sensitive to the effect of the area and therefore the effect of fragmentation, which
is not confirmed the second hypothesis. However, these species were not restricted only
to larger areas, being found also in small fragments used as a temporary source of
resources. The puma was the only species that showed significant incidence-isolation
relationships. There was no pattern of a homogeneous distribution for these species, but
for the tapir, with higher body mass recorded, the results were exactly the opposite of
what was observed. The minimum area estimated that 50% or more of the populations
of sensitive species occurs in fragmented landscape was 520 hectares. These results
reinforce the importance of maintaining forest fragments, almost all belonging to private
lands in the conservation of species.
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CALAÇA, Analice Maria. The use of landscape fragmented by mammals of medium and large size and its relationship with body mass in the area surrounding the Arowana, Goiás. 2009. 109 f. Dissertação (Mestrado em Ciências Biológicas - Biologia) - Universidade Federal de Goiás, Goiânia, 2009.