Population dynamics of the yellow clam <i>Mesodesma mactroides</i>: recruitment variability, density-dependence and stochastic processes

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dc.contributor.authorLima, M
dc.contributor.authorBrazeiro, A
dc.contributor.authorDefeo, O
dc.date.accessioned2025-01-21T01:31:41Z
dc.date.available2025-01-21T01:31:41Z
dc.date.issued2000
dc.description.abstractRecruitment of benthic marine invertebrates varies greatly at different spatio-temporal scales. For instance, population dynamics of the yellow clam Mesodesma mactroides at Uruguay exhibit large temporal fluctuations, mainly associated with recruitment. We used data from an 8 yr long-term study to develop an age-structured model to show that density-dependent and density-independent forces acting together can jointly explain the population fluctuations in a sandy-beach bivalve population of the yellow clam Mesodesma mactroides. The pure density-dependent deterministic model parameterised with empirical values estimated during the 8 yr study predicted stable dynamics. The dynamics of the deterministic skeleton was markedly influenced by the addition of a relatively small amount of stochastic variability to fertility rates. The yellow clam population dynamics seem to be driven by the combined forces of density-dependent and density-independent factors operating together. A combination of (uncorrelated) stochasticity in reproductive rates and asymmetric intercohort interactions (density-dependent recruitment and density-dependent survival rates) seems to be the key process generating large variability in recruitment.
dc.fuente.origenWOS
dc.identifier.eissn1616-1599
dc.identifier.issn0171-8630
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/97120
dc.identifier.wosidWOS:000166168900009
dc.language.isoen
dc.pagina.final108
dc.pagina.inicio97
dc.revistaMarine ecology progress series
dc.rightsacceso restringido
dc.subjectMesodesma mactroides
dc.subjectoscillations
dc.subjectrecruitment variability
dc.subjectage-structured model
dc.subjectmarine invertebrates
dc.subjectintercohort interactions
dc.subject.ods14 Life Below Water
dc.subject.odspa14 Vida submarina
dc.titlePopulation dynamics of the yellow clam <i>Mesodesma mactroides</i>: recruitment variability, density-dependence and stochastic processes
dc.typeartículo
dc.volumen207
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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