Retention-favorable timing of propagule release in barnacles and periwinkles

Autor(es)

Bueno, M. ^[1] ; Moser, G. A. O. ^[2] ; Tocci, B. R. C. ^[2] ; Flores, A. A. V. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Ctr Biol Marinha, BR-11600000 Sao Sebastiao, SP - Brazil

^[2] Univ Estado Rio de Janeiro, Fac Oceanog, Rio De Janeiro - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MARINE ECOLOGY-PROGRESS SERIES; v. 414, p. 155-165, 2010.
• Citações Web of Science: 7

Resumo

Recent studies on the ecology of marine larvae suggest that retention near coastal areas and self-recruitment are probably much more common than previously thought. In light of this, the advective potential of pelagic stages can be partially determined by the timing of propagule release. We sampled the upper-shore levels of a subtropical coastline in southeastern Brazil to examine the temporal patterns of propagule release for the common barnacle Chthamalus bisinuatus and the periwinkle Nodilittorina lineolata. The release timing in both species was very consistent between sites a few kilometers apart. Barnacles released nauplii in a rhythmic pattern, mostly coinciding with neap tides, when the speed of tidal currents was lowest. There was no variation in propagule release in relation to diel or flood-ebb tidal cycles. Periwinkles released propagules in a very irregular pattern, which remarkably matched a time series of wave heights. Egg capsules were released during periods of rough seas, when onshore surface currents were expected to prevail. Eggs were released mostly during ebb tides, and there was no diel variation. Propagule release rhythms are usually viewed as a means to ensure fast offshore advection, thus avoiding presumed hazardous conditions for larvae. However, propagule release strategies in these upper-shore species would more likely contribute to the retention of offspring close to parental stocks. (AU)

• Processo FAPESP: 08/10085-5 - Processos reguladores do assentamento larval, distribuição vertical, crescimento somático e rendimento reprodutivo de cracas do entre-marés rochoso
• Beneficiário: Augusto Alberto Valero Flores
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 06/58700-4 - Efeito da exposicao a acao das ondas no sincronismo semilunar da emissao de propagulos em invertebrados marinhos litoraneos da regiao de ubatuba, sp.
• Beneficiário: Marília Bueno Fernandes
• Modalidade de apoio: Bolsas no Brasil - Mestrado