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URI permanente desta comunidadehttps://bdc.icmbio.gov.br/handle/cecav/1401
Centro Nacional de Pesquisa e Conservação de Répteis e Anfíbios
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Resultados da Pesquisa
Item Prospects for domestic and feral Cat management on an inhabited tropical island.(Biological Invasions, 2017) Dias, Ricardo Augusto; Abrahão, Carlos Roberto; Micheletti, Tatiane; Mangini, Paulo Rogério; Gasparotto, Vinícius Peron de Oliveira; Pena, Hilda Fátima de Jesus; Ferreira, Fernando; Russell, James Charles; Silva, Jean Carlos RamosCat management campaigns have been implemented on several islands worldwide. However, few successful campaigns have occurred on permanently inhabited islands. Cats are known for causing severe impacts on the native insular fauna, posing an important threat to biodiversity. Moreover, this species is also responsible for zoonosis maintenance and transmission. A thorough understanding of cat population structure (e.g., supervised vs. unsupervised) is strongly suggested as a management action on inhabited islands, as it might promote more efficient and effective management of this species. Fernando de Noronha is an archipelago in the tropical Atlantic Ocean. The total cat population on the main island was estimated at 1287 animals, most of them supervised and subsidized around inhabited areas. Free-roaming cats currently threaten the endemic terrestrial fauna of Fernando de Noronha, and the cat density found by the present work is among the highest ever recorded on an island. Using population dynamic simulations, the long-term effects of reproduction control and removal of cats from the archipelago were assessed. Removal of cats was also suggested as a necessary management strategy to achieve negative population growth. In addition, it was more cost-effective than reproduction control. However, applying both removal and sterilization strategies to this population resulted in a higher population decrease than removal alone. For these reasons, a combination of reproductive control and cat eradication should be implemented in Fernando de Noronha.Item Occasional herpetofaunal introductions into and from the archipelago of Fernando de Noronha, Brazil.(Spixiana, 2023) Toledo, Luís Felipe; Zanotti, Alexandre P.; Bezerra, Lisandra Maria de Lima Silva; Abrahão, Carlos; Lisboa, Cybele SabinoInvasive species are on the rise. It is a global problem and early detections of alien species may be the key to control and eradicate potentially invasive popula tions. Thus, we gathered information of amphibian and reptile species that were introduced to or from the archipelago of Fernando de Noronha, in the northeast of Brazil. We found that at least one lizard species, Tropidurus hispidus (Spix, 1825), may be recently establishing a population in Fernando de Noronha main island, and the endemic skink from Fernando de Noronha, Trachylepis atlantica (Schmidt, 1945), may be establishing a breeding population in Recife, mainland Brazil. Ad ditional cases of accidental or intentional transport of amphibians and reptiles to or from the archipelago that apparently did not lead to the establishment of allo chthonous populations have also been detected and are reported herein. We sug gest stronger surveillance at the ports of the archipelago to prevent further inva sions or evasionsItem Using genetics to plan black rat (Rattus rattus) management in Fernando de Noronha archipelago, Brazil.(Perspectives in Ecology and Conservation, 2020) Gatto-Almeida, Fernanda; Pichlmueller, Florian; Micheletti, Tatiane; Abrahão, Carlos R.; Mangini, Paulo R.Invasive mammals such as rats are associated with negative impacts on native fauna and their eradication on islands around the world has been proved to result in substantial conservation gains. Fernando de Noronha is an archipelago located off the north-east coast of Brazil and has records of native fauna negatively impacted by introduced rats. We used D-Loop sequences and 14 microsatellite markers to investigate gene flow between three populations of Rattus rattus across two islands of Fernando de Noronha. Using both methods we found very great differentiation between the two islands, indicating very low or no gene flow. Our findings suggested if Rata Island were cleared of rats it would have a low probability of reinvasion occurring from the main island. Thus, we recommend an eradication program be implemented on Rata Island following the successful program on nearby Meio Island. © 2020 Associac¸ ao˜ Brasileira de Ciencia ˆ Ecologica ´ e Conservac¸ ao. ˜ Published by Elsevier Editora Ltda. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/).