Ficha de avaliação EICAT
Polydora cornuta
MO · Moderado
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: (5) Parasitismo,(6) Envenenamento / toxicidade
Evidências por mecanismo
Pacific oysters (Crassostrea gigas) infested by the polydorids Polydora cornuta Bosc, ... grow more slowly and have poorer body condition than do uninfested oysters. Glycogen, protein, and lipid content relative to the shell cavity volume are lower in infested compared to uninfested Crassostrea sp oysters. Additionally, polydorins have been shown to increase mortality rates in Pacifc oysters that are heav ily infested. (Martinelli et al., 2020)
Pacific oysters (Crassostrea gigas) infested by the polydorids Polydora cornuta Bosc, ... grow more slowly and have poorer body condition than do uninfested oysters. Glycogen, protein, and lipid content relative to the shell cavity volume are lower in infested compared to uninfested Crassostrea sp oysters. Additionally, polydorins have been shown to increase mortality rates in Pacifc oysters that are heav ily infested. (Martinelli et al., 2020)
Polydora cornuta has important and direct impact on the mussel, oyster and clam cultivations due to their extensive and massive tube construction (Nelson and Stauber, 1940). The tube construction causes the accumulation of sediments and feces and inhibits the bivalve growth. Decomposition of the accumulated sediments results in anaerobic fermentation and the production of hydrogen sulfide gas, which can kill the bivalves (Nelson and Stauber, 1940). (Neves and Rocha, 2008)
Referências: Julieta C. Martinelli, J.C., Lopes, H.M., Hauser, L., Jimenez-Hidalgo, I., King, T.L., Padilla-Gamiño, J.L., Rawson, P., Spencer, L.H., Williams, J.D. & Wood,C.L. (2020) Confrmation of the shell-boring oyster parasite Polydora websteri (Polychaeta: Spionidae) in Washington State, USA Scientific Reports (2020) 10:3961 https://doi.org/10.1038/s41598-020-60805-w; Neves C.S. and Rocha R.S. (2008) Introduced and cryptogenic species and their managements in Paranagua Bay, Brazil. Brazilian Archives of Biology and Technology 51, 623–633. https://doi.org/10.1590/S1516-89132008000300025.
2. Declínio no tamanho populacional de espécie nativa
Resposta: Sim
Mecanismos selecionados: (1) Competição
Evidências por mecanismo
The polluted soft-bottom benthic environments in Izmir Bay where a large international harbour is located have been densely invaded by the species originated from the north-west Atlantic Ocean (Polydora cornuta and Streblospio gynobranchiata) and the coast of Japan (Pseudopolydora paucibranchiata) (C¸ inar et al., 2005; Dagli & C¸inar, 2008). They constituted more than 95% of the total individuals and 70% of the total biomass at some stations. C¸inar et al. (2005) indicated that these species had a great impact on the prevailing ecosystem and seemed to have replaced some opportunistic species previously known from the polluted Izmir Bay such as Capitella capitata and Malacoceros fuliginosus. (Çinar, 2012)
Referências: Çinar, M. E. (2012). Alien polychaete species worldwide: current status and their impacts. Journal of the Marine Biological Association of the United Kingdom, 93(05), 1257–1278. doi:10.1017/s0025315412001646
3. Extinção local de população nativa
Resposta: Não
4. Reversibilidade da extinção local após remoção do táxon
Resposta: Nenhuma extinção registrada