Biphasic growth modelling in elasmobranchs based on asymmetric and heavy-tailed errors

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dc.contributor.authorContreras-Reyes, Javier E.
dc.contributor.authorWiff, Rodrigo
dc.contributor.authorSoto, Javier
dc.contributor.authorDonovan, Carl R.
dc.contributor.authorAraya, Miguel
dc.date.accessioned2025-01-20T22:21:21Z
dc.date.available2025-01-20T22:21:21Z
dc.date.issued2021
dc.description.abstractGrowth in fishes is usually modelled by a function encapsulating a common growth mechanism across ages. However, several theoretical works suggest growth may comprise two distinct mechanistic phases arising from changes in reproductive investment, diet, or habitat. These models are termed two-state or biphasic, where acceleration in growth typically changes around some transition age. Such biphasic models have already been successfully applied in elasmobranch species, where such transitions are detectable from length-at-age data alone, but where estimation has assumed normally distributed errors, which is inappropriate for such slow-growing and long-lived fishes. Using recent advances in growth parameter estimation, we implement a biphasic growth model with asymmetric and heavy-tailed errors. We use data from six datasets, encompassing four species of elasmobranchs, to compare the performance of the von Bertalanffy and biphasic models under normal, skew-normal, and Student-t error distributions. Conditional expectation maximization estimation proves both effective and efficient in this context. Most datasets analysed here supported asymmetric and heavy-tailed errors and biphasic growth, producing parameter estimates different from previous studies.
dc.fuente.origenWOS
dc.identifier.doi10.1007/s10641-021-01100-z
dc.identifier.eissn1573-5133
dc.identifier.issn0378-1909
dc.identifier.urihttps://doi.org/10.1007/s10641-021-01100-z
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/94648
dc.identifier.wosidWOS:000655947700001
dc.issue.numero5
dc.language.isoen
dc.pagina.final628
dc.pagina.inicio615
dc.revistaEnvironmental biology of fishes
dc.rightsacceso restringido
dc.subjectElasmobranchs
dc.subjectTwo-stage growth
dc.subjectvon Bertalanffy model
dc.subjectSharks
dc.subjectSkates
dc.subjectSkew-t distribution
dc.subjectECME algorithm
dc.subject.ods14 Life Below Water
dc.subject.ods15 Life on Land
dc.subject.odspa14 Vida submarina
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleBiphasic growth modelling in elasmobranchs based on asymmetric and heavy-tailed errors
dc.typeartículo
dc.volumen104
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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