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Population and production parameters of the wedge clam Donax trunculus (Linnaeus, 1758) in intertidal areas on the southwest Spanish coast: Considerations in relation to protected areas

dc.contributor.authorDelgado, Marina
dc.contributor.authorSilva, Luis
dc.contributor.authorGomez, Santiago
dc.contributor.authorMasferrer, Esther
dc.contributor.authorCojan, Miguel
dc.contributor.authorGaspar, Miguel
dc.date.accessioned2019-11-20T15:07:25Z
dc.date.available2019-11-20T15:07:25Z
dc.date.issued2017-09
dc.description.abstractThe main objectives of this study were (i) to provide an updated age-length key for D. trunculus from Atlantic waters, and (ii) to evaluate population dynamics, the timing of recruitment and production parameters of the wedge clam Donax trunculus in two moderately exposed sandy beaches (the protected area of Donana National Park and the tourist destination of Isla Canela) along the littoral of Huelva (SW Spain). First an in-depth analysis of the shell and updated estimation of growth parameters of the intertidal D. trunculus population were performed between January 2014 and July 2015 using two different methods i) thin-layer cross section (TL) (ii) length-frequency distributions (LFD). Von Bertalanffy growth functions provided an asymptotic length of 46 mm (LFD) and 46.7 mm (TL) and growth constants of 0.48 (LFD) and 0.47 yr(-1) (TL) in Donana beach. In addition, several deformities as well as signs of shell repair were observed. Population dynamics analyses through length frequency distribution clarified the timing of recruitment (February-March and July). The mean annual biomass ((B) over bar) of intertidal populations of D. trunculus ranged between 3.03 (Donana) and 3.31 g ash-free dry mass (AFDW) m(-2) yr(-1) (Isla Canela). Individual production showed the highest value at 27 mm length (0.117 g AFDW m(-2) yr(-1)) and annual production (P) ranged between 3.40 (Donana) and 4.91 g (Isla Canela), resulting in renewal rate (P/(B) over bar) values between 1.03 and 1.61, respectively. The present results, together with information on environmental parameters, revealed clear differences in population dynamics and production between beaches related to the presence or absence of a protection figure.
dc.description.sponsorshipEuropean Fisheries Fund
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.fishres.2017.04.012
dc.identifier.issn0165-7836
dc.identifier.issn1872-6763
dc.identifier.urihttp://hdl.handle.net/10400.1/13027
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.subjectSandy beaches
dc.subjectGrain-size
dc.subjectBivalvia donacidae
dc.subjectAtlantic coast
dc.subjectShell damage
dc.subjectSurf Clam
dc.subjectGrowth
dc.subjectGulf
dc.subjectHanleyanus
dc.subjectFisheries
dc.titlePopulation and production parameters of the wedge clam Donax trunculus (Linnaeus, 1758) in intertidal areas on the southwest Spanish coast: Considerations in relation to protected areas
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage241
oaire.citation.startPage232
oaire.citation.titleFisheries Research
oaire.citation.volume193
person.familyNameGaspar
person.givenNameMiguel
person.identifier.ciencia-idF719-07AC-E41F
person.identifier.orcid0000-0001-9245-8518
person.identifier.ridF-5398-2011
person.identifier.scopus-author-id23501123500
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication6185b7ee-acc9-4a7e-a7db-37384e94f4df
relation.isAuthorOfPublication.latestForDiscovery6185b7ee-acc9-4a7e-a7db-37384e94f4df

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