Longitudinal distribution and lateral pattern of megalopal settlement and juvenile recruitment of Carcinus maenas (L.) (Brachyura, Portunidae) in the Mira River Estuary, Portugal

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dc.contributor.authorSilva, Ines C.
dc.contributor.authorDinis, Ana M.
dc.contributor.authorFrancisco, Sara M.
dc.contributor.authorFlores, Augusto A. V.
dc.contributor.authorPaula, Jose
dc.contributor.institutionUniv Lisbon
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:12:18Z
dc.date.available2014-05-20T13:12:18Z
dc.date.issued2006-08-01
dc.description.abstractSettlement is a critical process in the life history of crabs, and thus affecting the abundance, distribution and structure of estuarine communities. The spatial pattern of settlement of megalopae of the shore crab Carcinus maenas along a longitudinal estuarine gradient (Mira River Estuary, Portugal) was examined, as well as its effects on the juvenile population. To measure megalopal settlement, four replicate collectors were deployed in six equally spaced stations along the estuarine axis. Juveniles were collected on the same locations with a quadrat randomly deployed on the substrate. To assess fine-scale megalopal settlement within a curved region of the estuary, replicate collectors were deployed on both margins along Moinho da Asneira curve. Megalopae settled differently along the six longitudinal points, with a tendency to attenuate their settlement upstream. Within the curved region, megalopae preferentially settled on the left margin collectors, probably due to the weaker velocity speeds felt on this margin. Concerning the overall juvenile density, there were significant differences among the stations distributed along the estuary, but they did no reflect a longitudinal dispersion attenuation pattern. Size-frequency distribution of the juvenile population showed that the average size is higher on the left margin. Recruits (carapace length between 1.0 mm and 3.4 mm) were more abundant on the upstream stations. Density of early juveniles (3.4 mm-6.5 mm) and juveniles (6.5 mm-10 mm) was more stable throughout the estuary axis than that of recruits. This distribution pattern may result from tidal excursion processes or mechanisms to avoid biotic interactions, such as predation and competition. (c) 2006 Elsevier Ltd. All rights reserved.en
dc.description.affiliationUniv Lisbon, Fac Ciências, IMAR, Lab Maritimo Guia, P-2750374 Cascais, Portugal
dc.description.affiliationUNESP, BR-11330205 Sao Vicente, SP, Brazil
dc.description.affiliationUnespUNESP, BR-11330205 Sao Vicente, SP, Brazil
dc.format.extent179-188
dc.identifierhttp://dx.doi.org/10.1016/j.ecss.2006.04.004
dc.identifier.citationEstuarine Coastal and Shelf Science. London: Academic Press Ltd- Elsevier B.V. Ltd, v. 69, n. 1-2, p. 179-188, 2006.
dc.identifier.doi10.1016/j.ecss.2006.04.004
dc.identifier.issn0272-7714
dc.identifier.urihttp://hdl.handle.net/11449/285
dc.identifier.wosWOS:000239855300015
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofEstuarine, Coastal and Shelf Science
dc.relation.ispartofjcr2.413
dc.relation.ispartofsjr1,059
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectsettlementpt
dc.subjectmegalopaept
dc.subjectjuvenilespt
dc.subjectCarcinus maenaspt
dc.subjectMira Estuarypt
dc.subjectlongitudinal dispersionpt
dc.titleLongitudinal distribution and lateral pattern of megalopal settlement and juvenile recruitment of Carcinus maenas (L.) (Brachyura, Portunidae) in the Mira River Estuary, Portugalen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.orcid0000-0003-0907-7453[3]
unesp.author.orcid0000-0001-9347-8860[4]
unesp.author.orcid0000-0001-8409-0821[5]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, São Vicentept

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Artigos - Ciências Biológicas - São Vicente