Ficha de avaliação EICAT
Hemidactylus frenatus Schlegel, 1836
MR · Alto
Avaliação histórica recuperada de registros do SIGEEI. A estrutura e os campos foram preservados; a confirmação permanece pendente.
Identificação e síntese
Nomenclature and linkage
The original assessment name is preserved. The accepted name and synonyms support discovery and reconciliation without overwriting the historical EICAT record.
Taxonomia registrada
Classificação canônica recuperada da integração com o GBIF. O sistema explicita os níveis que a própria resposta do GBIF não informa.
Avaliação de impactos
1. Redução no desempenho de indivíduos da biota nativa
Resposta: Sim
Mecanismos selecionados: (1) Competição,(12) Impactos indiretos via interações com outras espécies
Evidências por mecanismo
H. frenatus also showed the ability to increase foraging rates in the presence of its competitor, whereas L. lugubris foraging rates declined in the presence of H. frenatus (Petren and Case 1996) (Hanley et al. 1998)
The high relative density of H. frenatus at our sites, and their capacity to harbour Waddycephalus (a native pentastome, parasite), suggests that there may be impacts on native geckos and snakes through parasite spillback in Northeast Australia (Barnett et al. 2017).
Referências: Barnett LK, Phillips BL, Heath AC G, Coates A, Hoskin CJ. 2017. The impact of parasites during range expansion of an invasive gecko. Parasitology https://doi.org/10.1017/S003118201800015X Hanley, K. A., Petren, K., & Case, T. J. (1998). An experimental investigation of the competitive displacement of a native gecko by an invading gecko: no role for parasites. Oecologia, 115(1), 196-205.
2. Declínio no tamanho populacional de espécie nativa
Resposta: Sim
Mecanismos selecionados: (1) Competição
Evidências por mecanismo
The ongoing competitive displacement of the native Pacifc island gecko Lepidodactylus lugubris by the invading gecko Hemidactylus frenatus oers a unique opportunity to study the mechanisms of each of these avenues of competition as well as their interactions. On many islands L. lugubris and other nocturnal gecko species have been or are being competitively displaced by H. frenatus (Hanley et al. 1998) How does H. frenatus manifest its competitive superiority? Interference competition is usually the easiest form of competition to document since it is both visible and direct. (Case, 1994)
Referências: Hanley, K. A., Petren, K., & Case, T. J. (1998). An experimental investigation of the competitive displacement of a native gecko by an invading gecko: no role for parasites. Oecologia, 115(1), 196-205. Case, T. J., Bolger, D. T., & Petren, K. (1994). Invasions and competitive displacement among house geckos in the tropical Pacific. Ecology, 75(2), 464-477.
3. Extinção local de população nativa
Resposta: Sim
Mecanismos selecionados: (1) Competição
Evidências por mecanismo
The arrival of H. frenatus in the Mascarene Islands decimated six species of Nactus geckos, and three of them are now considered to be entirely extinct (Arnold 2000, Cole et al. 2005) (Rodder et al. 2008) Past competitive interactions between the Nactus species and H. frenatus were most likely along the space and, for some, food niche axes. In experimental enclosures, the Nactus species had no effect upon one another, but were excluded from refugia through aggressive and predatory interactions with H. frenatus. The increased risk to shared enemies would likely have caused Nactus extinction from islands invaded by H. frenatus. (Cole 2005)
Referências: Rödder, D., Solé, M., & Böhme, W. (2008). Predicting the potential distributions of two alien invasive Housegeckos (Gekkonidae: Hemidactylus frenatus, Hemidactylus mabouia). North-Western Journal of Zoology, 4(2). Cole, N. C. (2005). The ecological impact of the invasive house gecko Hemidactylus frenatus upon endemic Mauritian geckos (Doctoral dissertation, University of Bristol).
4. Reversibilidade da extinção local após remoção do táxon
Resposta: Reversível
Mecanismos selecionados: (1) Competição
Evidências por mecanismo
These Wndings support the hypothesis that H. frenatus led to the fragmentation and extinction of the endemic Nactus populations and demonstrate that artiWcial refugia made of a crumbly substrate may be used to limit future disturbances by this gecko and others like it in the Mascarene Islands and elsewhere.
Referências: Cole, N. C., Jones, C. G., & Harris, S. (2005). The need for enemy-free space: the impact of an invasive gecko on island endemics. Biological Conservation, 125(4), 467-474.