Full time mothers

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dc.contributor.authorRuiz-Tagle, N
dc.contributor.authorFernández, M
dc.contributor.authorPörtner, HO
dc.date.accessioned2025-01-21T01:10:33Z
dc.date.available2025-01-21T01:10:33Z
dc.date.issued2002
dc.description.abstractDaily rhythms in activity have been reported for marine and terrestrial organisms, including brooding behaviors which supply oxygen to the embryos of marine invertebrates. Considering that oxygen is a limiting factor in embryo masses of Brachyuran crabs and that female crabs play a critical role in supplying oxygen to the embryos, we studied and compared daily patterns of (1) brooding and nonbrooding behaviors in brooding females, (2) behaviors in nonbrooding females, and (3) oxygen provision to the embryos in a Xanthid crab (Homalaspis plana). We also experimentally evaluated whether daily patterns of nonbrooding behaviors were related to food intake. Behaviors were identified using video recordings and correlated with oxygen analyses in the center of the egg masses by use of microoptodes. According to PO2 recordings abdominal flapping was identified as the single, most important behavior supplying oxygen to the center of the egg mass, maintained at a constant rate during both day and night. Furthermore, the lack of a daily pattern in oxygen availability in the center of the embryo mass is consistent with the lack of daily pattern in abdominal flapping. In contrast, locomotor activity (walking) and maxilliped movements remained unrelated to PO2 oscillations and showed a pronounced diurnal pattern, increasing during the night. This strong diurnal rhythmicity in walking behavior decreased as embryos developed. The frequency of locomotor activity and egg ventilation increased as embryo development progressed. The increase in egg ventilation throughout embryo development may be a response to the increase in embryonic oxygen demand during development. The change in locomotor activity was unrelated to feeding activity, but may serve to make the ventilation process more efficient. These findings emphasize that oxygen is a crucial factor during early development, affecting the normal rate of development of embryos. In consequence, females permanently provide oxygen to the brood despite daily cycles in other behaviors. (C) 2002 Elsevier Science B.V. All rights reserved.
dc.fuente.origenWOS
dc.identifier.eissn1879-1697
dc.identifier.issn0022-0981
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96696
dc.identifier.wosidWOS:000178012300003
dc.issue.numero1-2
dc.language.isoen
dc.pagina.final47
dc.pagina.inicio31
dc.revistaJournal of experimental marine biology and ecology
dc.rightsacceso restringido
dc.subjectdaily rhythms
dc.subjectbrooding
dc.subjectoxygen supply
dc.subjectBrachyaran crabs
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.titleFull time mothers
dc.typeartículo
dc.volumen276
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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