Differential distribution pattern of native Ruditapes decussatus and introduced Ruditapes phillippinarum clam populations in the Bay of Santander (Gulf of Biscay): Considerations for fisheries management

Juanes, José A.; Bidegain, Gorka; Echavarri-Erasun, Beatriz; Puente, Araceli; Garcia, Ana C.; Garcı́a, Andrés; Bárcena, Javier F.; Álvarez, César; García-Castillo, Gerardo

doi:10.1016/j.ocecoaman.2012.08.007

Cited by 33 publications

(25 citation statements)

References 67 publications

(72 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This has been confirmed by many studies which also emphasized high spatial variability, regardless of the scale or the method of sampling (Juanes et al, 2012). This species can have lateral movements reaching 6 m per month (Tamura, 1970).…”

Section: Studied Species Description: Biological and Ecological Aspectsmentioning

confidence: 65%

Optimization of a survey using spatially balanced sampling: a single-year application of clam monitoring in the Arcachon Bay (SW France)

Kermorvant

Caill-Milly

D’Amico

et al. 2017

Aquat. Living Resour.

View full text Add to dashboard Cite

-Bivalves are important components of benthic marine and freshwater ecosystems throughout the world. One of the most exploited bivalves used for human consumption is manila clam (Venerupis philippinarum). In Arcachon Bay (SW France), commercial fishers and scientists have developed a monitoring survey to estimate clam stocks to assist in implementing a sustainable management strategy. The survey design that is currently used is based on standard stratified random sampling (StRS). The survey has been undertaken every 2 years since 2006. Each survey costs approximately €50 000, with funding provided by ∼20% of the commercial fishers. The survey is quite expensive, given that this resource is managed mostly at a regional level. In 2016 for instance, the survey was not done because of a shortfall in funds to support it. Recent studies on survey designs have focused on new developments that allow for higher statistical efficiency (lower sampling error) coupled with lower survey effort. Among these is the spatially balanced generalized random tessellation stratified (GRTS) design. The aim of this study is to compare the performance of the common StRS method with the GRTS design. To do this, we created a semi-virtual clam population by extrapolating the 2012 field survey results in the whole bay and simulated survey events with the two designs. We then assessed the two survey designs using three threshold precision levels (5%, 10% and 20% precision) for the two estimators of interest (biomass and abundance). We recommend the use of the GRTS design for clam surveys in Arcachon Bay. To achieve the same level of precision, GRTS requires less survey effort than StRS.

show abstract

Section: Studied Species Description: Biological and Ecological Aspectsmentioning

confidence: 65%

Optimization of a survey using spatially balanced sampling: a single-year application of clam monitoring in the Arcachon Bay (SW France)

Kermorvant

Caill-Milly

D’Amico

et al. 2017

Aquat. Living Resour.

View full text Add to dashboard Cite

show abstract

“…Managers, stakeholders, fishermen, and scientists must now work together. The peak in gamete emission periods for R. decussatus in the wild has been reported from April onwards (Delgado & Pérez-Camacho 2007) and from April to September for R. philippinarum (Rodríguez-Moscoso et al 1992), and the role of factors such as temperature and salinity under lab conditions for spawning has also been assessed (Delgado & Pérez-Camacho 2007, Joaquim et al 2008, Matias et al 2009). Results of those studies showed interspecific differences and indicated that, perhaps, simultaneous spawning under natural conditions for both species does not occur very frequently (Carrilho 2012).…”

Section: Discussionmentioning

confidence: 99%

“…It is a native species with a natural distribution in the eastern Atlantic from the British Isles to Senegal and into the Mediterranean Sea (Gofas et al 2011, Juanes et al 2012, Borrell et al 2014). This species is quite variable in shape and color as well as in shell sculpture, ranging from practically smooth to moderately reticulate (Poppe & Goto 2000).…”

Section: Introductionmentioning

confidence: 99%

Impacts of supplementation aquaculture on the genetic diversity of wild Ruditapes decussatus from northern Spain

Habtemariam¹,

Arias²,

García‐Vázquez³

et al. 2015

Aquacult. Environ. Interact.

View full text Add to dashboard Cite

The European carpet shell Ruditapes decussatus is among the most important shellfish species cultured in estuaries and bays of the northern Iberian Peninsula. Increased demand and overfishing of native R. decussatus, as well as irregular yields due in part to pollution and urban sprawl, have led to overexploitation of the species and to the import of the non-indigenous R. philippinarum in the early 1980s. In recent years, supplementation aquaculture of R. decussatus (supportive breeding) has been implemented as a management tool to recover the exhausted native carpet shell populations in Asturias, northern Spain. In this study, taxonomic analysis and a suite of genetic markers (ITS2, 5SrDNA, and mtCOI) were employed to assess the genetic composition of R. decussatus in 2 estuaries of the region, Ría del Eo and Ría de Villaviciosa. Our results revealed species misidentification and evidenced genetic introgression from the non-indigenous R. philippinarum into wild R. decussatus samples (4.2%), as well as in the aquaculture seed used for population supplementation (2.0%). Furthermore, we found significant genetic differentiation (F ST = 0.03750, p < 0.0001) between wild populations and aquaculture seed, while the adults of both estuaries were genetically homogeneous (p > 0.05). Several actions are strongly recommended to prevent inadvertent introduction of non-indigenous genomes and other genetic erosive processes on native species in the region: (1) banning releases of the alien species R. philippinarum, (2) developing diagnostic tests for detection of hybrids in captive breeding programs, and (3) assessing the conservation status of wild R. decussatus populations.

show abstract

“…Further details of this estuary and its sand flats are provided elsewhere (e.g. Puente et al, 2002;Juanes et al, 2012;L opez et al, 2013).…”

Section: Study Areamentioning

confidence: 99%

“…Clams were collected at 39 stations (1 m Â 10 m transects) by a professional shell-woman by hand raking of the sediment, following Juanes et al (2012). Transects were located in intertidal and shallow subtidal zones, considering these species depth range (Vincenzi et al, 2006a,b;Albentosa and Moyano, 2009).…”

Section: Clams Presence Datamentioning

confidence: 99%

Predicting coexistence and predominance patterns between the introduced Manila clam (Ruditapes philippinarum) and the European native clam (Ruditapes decussatus)

Bidegain

Bárcena

Garcı́a

et al. 2015

Estuarine, Coastal and Shelf Science

Self Cite

View full text Add to dashboard Cite

Differential distribution pattern of native Ruditapes decussatus and introduced Ruditapes phillippinarum clam populations in the Bay of Santander (Gulf of Biscay): Considerations for fisheries management

Cited by 33 publications

References 67 publications

Optimization of a survey using spatially balanced sampling: a single-year application of clam monitoring in the Arcachon Bay (SW France)

Optimization of a survey using spatially balanced sampling: a single-year application of clam monitoring in the Arcachon Bay (SW France)

Impacts of supplementation aquaculture on the genetic diversity of wild Ruditapes decussatus from northern Spain

Predicting coexistence and predominance patterns between the introduced Manila clam (Ruditapes philippinarum) and the European native clam (Ruditapes decussatus)

Contact Info

Product

Resources

About