Direct observations of larval dispersal in the colonial ascidian Podoclavella moluccensis Sluiter: evidence for closed populations
Journal of Experimental Marine Biology and EcologyPublished 1 May 1989
Andrew R. Davis, Alan Butler
Citations116
SJR quartileQ2
SJR score0.60
SNIP0.78
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TL;DR
It is concluded that populations of P. moluccensis have extremely limited potential for gene flow and may be regarded as effectively closed systems.
Abstract
The colonial ascidian Podoclavella moluccensis Sluiter (Aplousobranchia, Polycitoridae) occurs on discrete patches of substrata, separated by uninhabitable sandy seafloor. The potential for exchange between these patches was determined by continuously observing individual larvae from their release from adult colonies until their settlement. Of 270 larvae, 100 were successfully followed to settlement and 80% settled within 2.5 m of their parent colonies. The average distance moved by larvae was 2.2 m after swimming for < 2 min. The distance over which larvae dispersed was a positive function of the time that they spent swimming, but was influenced by current speed and the behaviour of larvae. We conclude that populations of P. moluccensis have extremely limited potential for gene flow and may be regarded as effectively closed systems.
Keywords
Earth and Planetary SciencesEngineeringEnvironmental Science
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