Predação de ninhos de tartarugas marinhas e avaliação de métodos de mitigação nas praias da Barreira do Inferno, Parnamirim/RN
Of the seven species of sea turtles on the planet, five occur in Brazil and are on the IUCN Red List of Endangered Species. As sea turtles are migratory, feeding routinely in the waters of one country and spawning on the beaches of another, all nations must work together to protect species. There...
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| Formato: | Dissertação |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/33014 |
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| Resumo: | Of the seven species of sea turtles on the planet, five occur in Brazil and are on
the IUCN Red List of Endangered Species. As sea turtles are migratory, feeding
routinely in the waters of one country and spawning on the beaches of another, all
nations must work together to protect species. Therefore, understanding the activity of
predators of sea turtle nests threatened with extinction is one of the necessary factors
for planning species conservation strategies. This dissertation, composed of four
chapters. The first provides a general introduction to sea turtles and nest predation,
one of the main natural threats to these populations. In order to minimize nest predation
in the Barreira do Inferno Launch Center (CLBI) area, Parnamirim / RN, Brazil, the
second chapter deals with an extensive bibliographic review, which has 57 articles.
Identifying the prevalence of carnivorous mammals as predators and better
effectiveness of non-lethal mitigation methods. In the third chapter, the survey of nest
predations in CLBI was carried out, using historical data from TAMAR between the
seasons of 2005/2006 until 2017/2018. Predatory activity in the area has shown high
levels (above 50%) in recent seasons, with the fox (Cerdocyon thous) as the main
predator species, followed by the armadillo peba (Euphractus sexcinctus). In the fourth
chapter, carried out on the spot, five different methods were tested to mitigate the
predation of sea turtle nests in the CLBI area facing the fox (Cerdocyon thous): control,
guide and stake, galvanized screen, pepper powder and flag. During the experiment,
there was a decrease in the percentage of predation to 33%. It was observed that the
flag and the screen had less occurrences of predation. In addition, fox visitations have
decreased over the life of the nest, as opposed to the digging and predation that are
more intense in the post-laying and hatching of the nest. The results of this work
underscore the importance of monitoring efforts in the study area for the conservation
and management of the hawksbill turtle (Eretmochelys imbricata) population. |
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