Effects of harvesting and density dependence on the demography of sandy beach populations

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dc.contributor.authorBrazeiro, A
dc.contributor.authorDefeo, O
dc.date.accessioned2025-01-21T01:32:19Z
dc.date.available2025-01-21T01:32:19Z
dc.date.issued1999
dc.description.abstractSandy beach ecologists concur that natural populations living in these harsh environments are controlled almost exclusively by physical factors, biotic factors being largely irrelevant. This paper provides evidence that human-induced perturbations as well as biotic, density-dependent processes also influence sandy beach populations. Results were obtained from a long-term study (8 yr) of the artisanally harvested yellow clam Mesodesma mactroides on a Uruguayan exposed sandy beach. The study included an experimental manipulation of fishing effort based on the closure of the clam fishery for 32 consecutive months. Fine-scale demographic parameters, such as age-specific survival probability and fertility, as well as coarse-scale demographic parameters, such as age composition, elasticity to demographic parameters, adult clam density, and population growth rate, were significantly affected by fishing effort and/or adult density. These results yield useful information from the management and conservation points of view, such as the threshold range of parent stock densities and fishing mortality levels capable of supporting a sustainable yield over time. Critical demographic parameters for population growth rate are also highlighted.
dc.fuente.origenWOS
dc.identifier.eissn1616-1599
dc.identifier.issn0171-8630
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/97241
dc.identifier.wosidWOS:000081336200011
dc.language.isoen
dc.pagina.final135
dc.pagina.inicio127
dc.revistaMarine ecology progress series
dc.rightsacceso restringido
dc.subjectdemography
dc.subjectdensity dependence
dc.subjectharvesting
dc.subjectsandy beach
dc.subjectfishery
dc.subjectmanagement
dc.subjecthuman impact
dc.subjectmatrix model
dc.subjectelasticity
dc.subjectlong-term
dc.subject.ods14 Life Below Water
dc.subject.odspa14 Vida submarina
dc.titleEffects of harvesting and density dependence on the demography of sandy beach populations
dc.typeartículo
dc.volumen182
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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