Thermal tolerance of crustacean larvae(zoea I) in two different populations of the kelp crab <i>Taliepus dentatus</i> (Milne-Edwards)

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dc.contributor.authorStorch, Daniela
dc.contributor.authorSantelices, Pedro
dc.contributor.authorBarria, Jessica
dc.contributor.authorCabeza, Karla
dc.contributor.authorPoertner, Hans-Otto
dc.contributor.authorFernandez, Miriam
dc.date.accessioned2025-01-21T00:09:09Z
dc.date.available2025-01-21T00:09:09Z
dc.date.issued2009
dc.description.abstractStudies of thermal tolerance in marine ectotherms are key in understanding climate effects on ecosystems; however, tolerance of their larval stages has rarely been analyzed. Larval stages are expected to be particularly sensitive. Thermal stress may affect their potential for dispersal and zoogeographical distribution. A mismatch between oxygen demand and the limited capacity of oxygen supply to tissues has been hypothesized to be the first mechanism restricting survival at thermal extremes. Therefore, thermal tolerance of stage zoea I larvae was examined in two populations of the Chilean kelp crab Taliepus dentatus, which are separated by latitude and the thermal regime. We measured temperature-dependent activity, oxygen consumption, cardiac performance, body mass and the carbon (C) and nitrogen (N) composition in order to: (1) examine thermal effects from organismal to cellular levels, and (2) compare the thermal tolerance of larvae from two environmental temperature regimes. We found that larval performance is affected at thermal extremes indicated by decreases in activity, mainly in maxilliped beat rates, followed by decreases in oxygen consumption rates. Cardiac stroke volume was almost temperature-independent. Through changes in heart rate, cardiac output supported oxygen demand within the thermal window whereas at low and high temperature extremes heart rate declined. The comparison between southern and central populations suggests the adaptation of southern larvae to a colder temperature regime, with higher cardiac outputs due to increased cardiac stroke volumes, larger body sizes but similar body composition as indicated by similar C: N ratios. This limited but clear differentiation of thermal windows between populations allows the species to widen its biogeographical range.
dc.fuente.origenWOS
dc.identifier.doi10.1242/jeb.030205
dc.identifier.eissn1477-9145
dc.identifier.issn0022-0949
dc.identifier.urihttps://doi.org/10.1242/jeb.030205
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95697
dc.identifier.wosidWOS:000265271500024
dc.issue.numero9
dc.language.isoen
dc.pagina.final1376
dc.pagina.inicio1371
dc.revistaJournal of experimental biology
dc.rightsacceso restringido
dc.subjectoxygen consumption
dc.subjectheart rate
dc.subjectswimming
dc.subjectmass
dc.subjectC:N ratio
dc.subjectzoea I
dc.subjectTaliepus dentatus
dc.subjectlarvae
dc.subjectthermal tolerance
dc.subjecttemperature
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.titleThermal tolerance of crustacean larvae(zoea I) in two different populations of the kelp crab <i>Taliepus dentatus</i> (Milne-Edwards)
dc.typeartículo
dc.volumen212
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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