Ecologia comportamental de mabuya agmosticha (MABUYIDAE) na bromeliaceae encholirium spectabile: relevância desta associação e da bromélia hospedeira para o semiárido brasileiro
The success of a species in a particular habitat or ecosystem depends on a range of behaviors, each with a specific purpose, always taking into account maximizing energy gain and decreasing costs. The habitat where the species lives guides its behaviors, most of them focused on the way of life in...
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| Formato: | doctoralThesis |
| Idioma: | pt_BR |
| Publicado em: |
Brasil
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/28366 |
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| Resumo: | The success of a species in a particular habitat or ecosystem depends on a range of
behaviors, each with a specific purpose, always taking into account maximizing energy
gain and decreasing costs. The habitat where the species lives guides its behaviors, most
of them focused on the way of life in these places. Bromeliads, for example, are important
habitats for many species, including reptiles, among which Mabuya agmosticha, a species
of lizard of the Mabuyidae family, bromelicolous habitat and endemic from northeastern
Brazil. Considering its close relationship with the Encholirium spectabile, a rupicolous
bromeliad in the Brazilian semiarid, this study addressed the behavioral ecology of M.
agmosticha in association with E. spectabile in the Agreste region of the state of Rio
Grande do Norte, besides analyzing the importance of these host plants for biodiversity
and the socioeconomics of the northeastern semiarid. Methodology: The fieldwork was
carried out during monthly excursions, for four consecutive days, over a year, when the
behaviors of this species of lizard in association with the bromeliads were observed and
recorded, such as period of activity, diet, foraging behavior, thermoregulatory behavior
and detection and flight of predators. This part of this field study was observational; To
analyze the diet, data were collected during part of the Master's research. For foraging
behaviors, the activities of each individual were categorized into Proportion of Time
Spent Moving (PTM), Number of Movements Per Minute (MPM), Number of Successful
Attacks on Prey per Minute, and Time on Watch. The influence of seasonality on diet and
foraging behaviors was also tested. Circular statistics were used to evaluate the
relationship between lizard position and the angle of incidence of sun rays and hours. The
period of activity was tested by the number of active individuals over hours and days, as
well as the effects of seasonality and interspecific variations in the population. Escape
behaviors were expressed by the Flight Intiation Distance (FID) index, and the predator
potential simulation was performed by a human observer. Other predator models, such as
snakes, ontogeny on FID values, as well as the effects of seasonality, substrate
temperature, caudal autotomy and between the sexes were also tested. To evaluate the
importance of E. spectabile for the semiarid biodiversity and its socioeconomic role,
fieldwork was carried out over nine years, allied to extensive bibliographic research. |
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