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Título

Ultrastructure and dispersal potential of sponge larvae: tufted vs evenly ciliated parenchymellae

AutorUriz, María Jesús CSIC ORCID ; Turon, Xavier CSIC ORCID ; Mariani, Simone CSIC ORCID
Palabras claveCacospongia mollior
Behaviour
Parenchymella
Scopalina lophyropoda
Ultrastructure
Sponge larva
Fecha de publicación2008
EditorBlackwell Publishing
CitaciónMarine Ecology : An Evolutionary Perspective 29 : 280-297 (2008)
ResumenIn this work we analyse the ultrastructure and behaviour of two representative types of parenchymella sponge larvae: the evenly ciliated larva of Scopalina lophyropoda, and the tufted larva of Cacospongia mollior. We sought to find correlates of the dispersal abilities and distribution patterns of these species. Laboratory experiments were performed under two different conditions of water movement (still water and a slight oscillatory movement), and at different times of the larval life-span. Larvae of S. lophyropoda were motionless most of the time, maintaining a vertical posture and rotating on their main axis, and they did not respond to directional light. Larvae of C. mollior were active swimmers that responded negatively to light stimuli. In both cases, movement decreased as the larval age increased. Ultrastructurally, C. mollior larvae were more compact, with more reserves and abundant collagen bundles. Desmosome-like structures were seen connecting the apical parts of the ciliated surface in both species. Two different types of putative light-sensitive structures were found. Both structural and behavioural characteristics favour a greater dispersal capability for C. mollior and a philopatric dispersal mode for S. lophyropoda. These predictions are in agreement with the observed ecological distribution of the species.
Descripción18 Páginas ; 16 Figuras ; 5 Figuras
Versión del editorhttp://dx.doi.org/10.1111/j.1439-0485.2008.00229.x
URIhttp://hdl.handle.net/10261/38825
DOI10.1111/j.1439-0485.2008.00229.x
ISSN0173-9565
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