Subtidal benthic megafauna in a productive and highly urbanised semi-enclosed bay (Ría de Vigo, NW Iberian Peninsula)

Aneiros, Fernando; Rubal, Marcos; Troncoso, Jesús S.; Bañón, Rafael

doi:10.1016/j.csr.2015.09.018

Cited by 4 publications

(2 citation statements)

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“…This bay, an important shellfish production and manufacturing centre due to the high productivity of the seagrass meadows of Zostera marina and Z . noltei [ 53 ], harbours several non-indigenous marine molluscs mostly introduced via aquaculture activities [ 46 , 53 , 54 ]. Approximately 74% of the national production of the native mussel M .…”

Section: Methodsmentioning

confidence: 99%

“…Bostrycapulus odites originates from the Southwest Atlantic and currently has a very restricted distribution in the Iberian Peninsula [ 42 , 43 ]. Crepidula fornicata is considered an invasive species with well established populations along the Atlantic coast of northern Spain and is native to the Atlantic coast of North America [ 31 , 44 – 46 ]. Lastly, Crepipatella dilatata is native to the coasts of Chile and Argentina [ 32 – 34 , 37 ] and belongs to a complex of cryptic species that includes at least two other species not yet known as NIS: Crepipatella fecunda and Crepipatella occulta [ 33 , 37 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

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The alien slipper limpet Crepipatella dilatata (Lamarck, 1819) in northern Spain: A multidisciplinary approach to its taxonomic identification and invasive biology

et al. 2018

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The slipper limpet Crepipatella dilatata, native to Chile and Argentina, was introduced in Spain in 2005. The species was thought to inhabit the region of Rias Bajas, yet recently, putative C. dilatata populations have been documented on the coast of north-central Spain and in the Ebro Delta of the Spanish Mediterranean. Here we undertook a multidisciplinary approach to study the invasion biology of this species. Specifically, two geographically distant populations, one being a successfully established population from O Grove and the other a declining population from Gijon, were studied over the course of four years. Analyses of morphological and developmental traits as well as genetic information confirmed the presence of C. dilatata in these sites. The results revealed polymorphism in anatomical traits and shell shape. Shell shape polymorphism was unevenly distributed among sites and among sexes. Males were monomorphic, while females were polymorphic. Of the female morphotypes encountered, one was absent in the declining population from Gijón. Size at first female maturation and female size were greater in the declining population than in the established population. Reproductive success varied seasonally but not spatially among populations. In the established population, gregariousness was significantly greater; the size when sex changes was found to be plastic and socially controlled. The sex ratio of the declining population was female biased while in the established population the sex ratio changed during the study period from being balanced to being female biased. This change in sex ratio was probably due to higher male mortality. Molecular analyses pointed to the localities of Corral Bay in southern Chile and Puerto Madryn in southern Argentina as potential population sources. The intercontinental import of fresh mussels cultivated in Chilean farms is a likely source of this mussel in Spain. Comparison with available data of native populations of C. dilatata strongly indicate that ecophenotypic plasticity, socially controlled sex change, high gregariousness, increased nurse egg supply to viable larvae during the encapsulated developmental period, later maturation and larger female sizes altogether enhance establishment success of this non-indigenous species. Human-mediated factors like the intraregional mussel trade and transplantation are also likely secondary dispersal mechanisms favouring the spread of this organism.

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Section: Methodsmentioning

confidence: 99%