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Spatio-temporal variability in recruitment pattern of the invasive mussels Xenostrobus securis

2016; Frontiers Media; Volume: 3; Linguagem: Inglês

10.3389/conf.fmars.2016.05.00176

2296-7745

Agar Montes, Vázquez Elsa, Celia Olabarría,

Marine Biology and Ecology Research

Event Abstract Back to Event Spatio-temporal variability in recruitment pattern of the invasive mussels Xenostrobus securis Agar Montes1*, Elsa Vázquez1 and Celia Olabarria1 1 UNIVERSIDADE DE VIGO, Departamento de Ecoloxía e Bioloxía Animal, Spain The black pygmy mussel Xenostrobus securis is endemic to the brackish waters of Australia and New Zealand (Pascual et al. 2010). It was reported as an invasive species for first time in Italian coastal lagoons (Sabelli et al., 1994). Later expansion occurred across the Mediterranean Sea, being cited in the Po River Delta (Russo, 2001), in French Mediterranean lagoons (Zenetos et al., 2004) and the Tyrrhenian Sea (Giutsi et al., 2008) so far. It has also been cited as invasive species in Japanese waters (Kimura et al., 1999). In the Iberian Peninsula, X. securis was first reported in the Ría de Vigo (Garci et al., 2007) and later in the Ría de Pontevedra. In the Ria de Vigo, the largest abundance of X. securis is at Pontesampaio, location placed at the mouth of the Rio Verdugo. Density of X. securis decrease from areas close to the mouth of the rivers to the middle part of rias (Gestoso et al. 2012). Salinity conditions and diversity of recipient communities seem to be important factors explaining its pattern of abundance and distribution in the Galician Rias Baixas (Gestoso et al., 2012). Indeed in its native origin, larvae do not resist salinities higher than 17.5 (Wilson, 1968). In the Galician Rias Baixas, less diverse communities seem to be less resistant to invasion by this species (Gestoso et al., 2012) as shown by other species worldwide (Kennedy et al., 2002). Although there are some studies on the factors that affect the distribution and abundance of X. securis adults in Galician rias (Gestoso et al., 2012), there is no information on pre- and post-settlement processes. Such information is essential to fully understand the invasion process of this species in the Galician Rias Baixas as well as to estimate its potential for dispersion and, therefore, its effects on the ecosystem. The experiment was conducted at the San Simon Inlet in the inner part of the Ria de Vigo (NW Spain 42º 18´43” N, 8º 38´9” W) at four locations: Pontesampaio (close to the river mouth), Cesantes, Punta Cabalo and Rande. Locations covered a range of different environmental conditions, i.e. salinity, in which the species show different patterns of abundance. At each location, three treatments were deployed: A) a recruitment plate (P), B) a recruitment plate with an exclusion cage to avoid access of predators (WP), and C) a recruitment plate with an exclusion cage (PC) with three holes (on the top and lateral sides of the cage) that allowed the access to predators, i.e. procedural control. Recruitment plates were PVC plates of 15 x 15 cm with a scouring pad of 14 x 9 cm attached. Recruitment plates were screwed to rocky platforms using stainless steel screws. They were randomly placed at the same height on the shore and separated by a minimum distance of ~1 m. From May to November 2014 recruitment plates were collected and replaced for new ones once a month. The analysis data was determined the effect of Time, Treatment and Location on the recruitment, a three way orthogonal analysis of variance on log-transformed data was done. A posteriori Tukey test was performed to analyse significant main effects or interactions. The results indicated that the main recruitment period was from May to October. Nevertheless, recruitment varied across locations, but depending on month considered (F15.216=52.95, p<0.001). The largest number of recruits occurred at Pontesampaio between July and August. In contrast the smaller number of recruits occurred at Cesantes (Figure 1). In addition, the treatments also had an effect on recruitment (F 2, 216= 4.54, p< 0.05). Recruits settlement was the highest on plates with exclusion cages. Cages were not an artifact since number of recruits settled on control and procedural control were similar (Figure 2). The long period of recruitment indicates the high invasiveness potential of this species. Nevertheless, this species is more likely to occur close to the river mouth. Physical factors such as salinity together with predation can be key factors controlling its spread along the estuarine area. Figure 1 Figure 2 References Garci, M. E., Trigo, J. E., Pascual, S., González, A. F., Rocha, F. and Guerra, A. 2007. Xenostrobus securis (Lamarck, 1819) (Mollusca:Bivalvia): first report of an introduced species in Galician Waters. Aquaculture International 15: 19-24. Gestoso, I., Olabarria, C. and Arenas, F. 2012. The invasive mussel Xenostrobus securis along the Galician Rías Baixas (NW of Spain): status of invasión. Cahiers de Biologie Marine 53: 391-396. Giutsi, F., Dell´Angelo, B., Sosso, M. and Schiaparelli, S. 2008. First record of the invasive species Xenostrobus securis (Lamarck 1819) (Bivalvia: Mytilidae) from Central Tyrrhenian Sea (Western Mediterranean). Bollettino Malacologico 44: 11-14. Kennedy, T. A., Naeems. S., Howe, K. M., Knops, J. M. H., Tilman, D. and Reich, P. 2002. Biodiversity as a barrier to ecological invasión. Nature 417: 636- 638. Kimura T., Masaki, T. and Yasuhiro,S. 1999. Limnoperna fortunei kikuchii Habe, 1981 (Bivalvia : Mytilidae) is a synonym of Xenostrobus securis (Lamarck, 1819): introduction into Japan from Autralia and/or New Zeland. Japanese Journal of Malacology 58: 101- 117. Pascual, S., Villalba, A., Abollo, E., Garci, M., González, A. F., Nombrela, M., Posada, D. and Guerra, A. 2010. The mussel Xenostrobus securis: a well-established alien invader in the Ría de Vigo (Spain, NE Atlantic). Biological Invasions 12: 2091- 2103. Russo, P. 2001. Grande contrentrazione di Xenostrobus securis (Lamarck 1819) in varie zone del Delta del Po. Conchiglia 298: 49-50. Sabelli, B. and Speranza, S. 1994. Rinvenimiento di Xenostrobus sp. (Bivalvia, Mytilidae) nella laguna di Venecia. Bollettino Malacologico 29: 311- 318. Wilson, B. R. 1968. Survival and reproduction of the mussel Xenostrobus securis (Lam.) (Mollusca: Bivalvia: Mytilidae) in a Western Australian estuary. Journal of Natural History 2: 307- 328. Zenetos, A., Gofas, S., Russo, G. and Templado, J. 2004. CIESM atlas of exotic species in the Mediterranean. In: Briand F (ed) Mollusc, vol.3. CIESM Publishers, Monaco 376pp. Keywords: Recrutment, predation, Xenostrobus, Spatio-temporal variability, non-indigenous species Conference: XIX Iberian Symposium on Marine Biology Studies, Porto, Portugal, 5 Sep - 9 Sep, 2016. Presentation Type: Poster Presentation Topic: 1. ECOLOGY, BIODIVERSITY AND VULNERABLE ECOSYSTEMS Citation: Montes A, Vázquez E and Olabarria C (2016). Spatio-temporal variability in recruitment pattern of the invasive mussels Xenostrobus securis. Front. Mar. Sci. Conference Abstract: XIX Iberian Symposium on Marine Biology Studies. doi: 10.3389/conf.FMARS.2016.05.00176 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 30 Apr 2016; Published Online: 03 Sep 2016. * Correspondence: PhD. Agar Montes, UNIVERSIDADE DE VIGO, Departamento de Ecoloxía e Bioloxía Animal, Vigo, Pontevedra, 36310, Spain, agarmontes@gmail.com Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Agar Montes Elsa Vázquez Celia Olabarria Google Agar Montes Elsa Vázquez Celia Olabarria Google Scholar Agar Montes Elsa Vázquez Celia Olabarria PubMed Agar Montes Elsa Vázquez Celia Olabarria Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.