Survive or swim : different relationships between migration potential and larval size in three sympatric Mediterranean octocorals
Guizien, Katell (Sorbonne Université. Laboratoire d'Ecogéochimie des Environnements Benthiques)
Viladrich, Núria (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Martínez-Quintana, A. (Institut de Ciències del Mar)
Bramanti, Lorenzo (Sorbonne Université. Laboratoire d'Ecogéochimie des Environnements Benthiques)

Fecha:	2020
Resumen:	Knowledge about migration potential is key to forecasting species distributions in changing environments. For many marine benthic invertebrates, migration happens during reproduction because of larval dispersal. The present study aims to test whether larval size can be used as a surrogate for migration potential arising from larval longevity, competence, sinking, or swimming behavior. The hypothesis was tested using larvae of three sympatric gorgonian species that release brooded lecithotrophic larvae in the same season: Paramuricea clavata, Corallium rubrum and Eunicella singularis. Despite different fecundities and larval sizes, the median larval longevity was similar among the three species. Free-fall speed increased with larval size. Nevertheless, the only net sinkers were the P. clavata larvae, as swimming was more common than free fall in the other two species with larger larvae. For the other two species, swimming activity frequency decreased as larval size increased. Interestingly, maximum larval longevity was lowest for the most active but intermediately sized larvae. Larval size did not covary consistently with any larval traits of the three species when considered individually. We thus advise not using larval size as a surrogate for migration potential in distribution models. The three species exemplified that different mechanisms, i. e. , swimming activity or larval longevity, resulting from a trade-off in the use of energy reserves can facilitate migration, regardless of life history strategy.
Ayudas:	Ministerio de Educación y Ciencia CTM2009-10007
Nota:	Unidad de excelencia María de Maeztu CEX2019-000940-M
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Ecology ; Animal migration ; Behavioural ecology
Publicado en:	Scientific reports, Vol. 10 (October 2020) , art. 18096, ISSN 2045-2322

DOI: 10.1038/s41598-020-75099-1
PMID: 33093585

12 p, 1.0 MB

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