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Statement on the identity of apple snails

EFSA Journal 2012;10(4):2645 [11 pp.]. doi:10.2903/j.efsa.2012.2645
  EFSA Panel on Plant Health (PLH) Panel Members Richard Baker, Thierry Candresse, Erzsébet Dormannsné Simon, Gianni Gilioli, Jean-Claude Grégoire, Michael John Jeger, Olia Evtimova Karadjova, Gábor Lövei, David Makowski, Charles Manceau, Maria Navajas, Angelo Porta Puglia, Trond Rafoss, Vittorio Rossi, Jan Schans, Gritta Schrader, Gregor Urek, Johan Coert van Lenteren, Irene Vloutoglou, Stephan Winter and Marina Zlotina Acknowledgment The Panel wishes to thank the members of the Working Group on Pomacea: Nils Carlsson, Gianni Gilioli, Trond Rafoss, Gritta Schrader, Johan Coert van Lenteren, and EFSA staff: Vos Sybren for the support provided to this scientific opinion. Contact plh@efsa.europa.eu
Type: Statement of the Scientific Committee/Scientific Panel On request from: European Commission Question number: EFSA-Q-2012-00375 Adopted: 21 March 2012 Published: 04 April 2012 Last updated: 25 May 2012. This version replaces the previous one/s. Affiliation: European Food Safety Authority (EFSA), Parma, Italy
Abstract

Following a request by the European Commission, EFSA’s Panel on Plant Health was asked to deliver a statement to clarify the current scientific knowledge regarding the identity of the apple snails in the context of the evaluation of the pest risk analysis prepared by the Spanish Ministry of Environment and Rural and Marine Affairs (EFSA Panel on Plant Health (PLH), 2012). The Panel concludes on the risk to plant health posed by Pomacea species in the ‘canaliculata complex’, that out of the around 50 species in the genus of Pomacea, four species P. canaliculata, P. insularum, P. lineata and P. maculata belong to the ‘canaliculata complex’, where P. insularum and P. maculata are recently considered to be synonyms. Current methods of identification imply high uncertainty if risk reduction options are applied at the Pomacea single species level. The Spanish pest risk analysis identifies important plant health risks connected to Pomacea species. The available scientific evidence indicates that other Pomacea species may pose similar risks to plant health as identified for P. insularum.
The Panel clarifies that risk reduction options should not be targeted to single species of the genus Pomacea considering: (i) the dynamical situation in the current study on the systematics of the Ampullariidae species and the genus Pomacea in particular; (ii) the uncertainties and the possible unexpected evolution of the invasive potential of species of Pomacea other than P. insularum and P. canaliculata; (iii) the poor knowledge on the trophic habits of many species of the genus Pomacea, with possible overlaps in the trophic niche (macrophytes); (iv) the high uncertainty on the identification of the different Pomacea species.

© European Food Safety Authority, 2012

Summary

Following a request by the European Commission, EFSA’s Panel on Plant Health was asked to deliver a statement to clarify the current scientific knowledge regarding the identity of the apple snails in the context of the evaluation of the pest risk analysis prepared by the Spanish Ministry of Environment and Rural and Marine Affairs (EFSA Panel on Plant Health (PLH), 2012).

The Panel concludes on the risk to plant health posed by Pomacea species in the ‘canaliculata complex’, that out of the around 50 species in the genus of Pomacea, four species P. canaliculata, P. insularum, P. lineata and P. maculata belong to the ‘canaliculata complex’, where P. insularum and P. maculata are recently considered to be synonyms.

Current methods of identification imply high uncertainty if risk reduction options are applied at the Pomacea single species level.

The Spanish pest risk analysis identifies important plant health risks connected to Pomacea species. The available scientific evidence indicates that other Pomacea species may pose similar risks to plant health as identified for P. insularum.

The Panel clarifies that risk reduction options should not be targeted to single species of the genus Pomacea considering: (i) the dynamical situation in the current study on the systematics of the Ampullariidae species and the genus Pomacea in particular; (ii) the uncertainties and the possible unexpected evolution of the invasive potential of species of Pomacea other than P. insularum and P. canaliculata; (iii) the poor knowledge on the trophic habits of many species of the genus Pomacea, with possible overlaps in the trophic niche (macrophytes); (iv) the high uncertainty on the identification of the different Pomacea species.

Keywords

Apple snail, canaliculata complex, Pomacea canaliculata, Pomacea insularum, Pomacea spp.