Morfometria, variação anual no peso e demografia do Tico-tico-rei-cinza (Lanio pileatus: thraupidae) em dois ambientes de caatinga no nordeste do Brasil
The caatinga is considered the only exclusively Brazilian biome, with a total area of 735.000km². It is estimated that about 59% of this area has already been removed and only 2% are protected in conservations units. The region is characteristic by strong seasonality and heterogeneity in their en...
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Formato: | Dissertação |
Idioma: | por |
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Universidade Federal do Rio Grande do Norte
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Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/20319 |
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Resumo: | The caatinga is considered the only exclusively Brazilian biome, with a total area of
735.000km². It is estimated that about 59% of this area has already been removed and
only 2% are protected in conservations units. The region is characteristic by strong
seasonality and heterogeneity in their environments. This paper sets generate information
on morphological and population patterns Lanio pilatus in two areas of caatinga of
Estação Ecológica do Seridó (ESEC – Seridó), Serra Negra do Norte - RN. Data
collection was performed in six phases between July 2012 and December 2014, covering
the end of the dry and rainy seasons in the region. The captures were performed with nets
and individuals captured were marked with metal rings and measured (weight, wing
length, tail, tarsus, culmen and tip of the bill to nostril). Through these measures, we
observed that only males of open area range in weight during the dry and rainy season,
youngs were significantly lower for all parameters measured, and males were larger than
females in three characteristics (weight, wing length and tail) in open area and only one
(wing length) in the closed area. The population parameters were generated from the
mark-capture-recapture technique by program MARK, using the techniques of robust
design and CJS. The survival probability of detection and population estimates varied
with time. Only individuals of open area fluctuated in their estimates during the study.
Overall, the environment was a great mediator of results which increases the need for
more studies on the life history of the species in the region. |
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