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Reproducción en Hymeniacidon sanguinea (Grant, 1926): Biología de la larva y primeros estadios postlarvarios

Authors: Uriz, María Jesús;

Reproducción en Hymeniacidon sanguinea (Grant, 1926): Biología de la larva y primeros estadios postlarvarios

Abstract

[ES] Se han estudiado algunos aspectos del comportamiento larvario en la especie Hymeniacidon sanguinea, en el mar y bajo condiciones experimentales de laboratorio. Las larvas tienen un corto período de vida libre y no se muestran selectivas respecto a la naturaleza y orientación del sustrato: el asentamiento tiene lugar en cualquier tipo de superficie rugosa. Tampoco se ha observado ninguna respuesta respecto a la luz; sin embargo, presentan un geotactismo negativo durante las primeras horas de vida libre, geotactismo que se convierte en negativo cuando se aproxima el asentamiento. El sistema acuífero de las larvas fijadas comienza a desarrollarse 5 días después del asentamiento, y al cabo de 7 días el rhagon ya está completo

[EN] Larval behaviour patterns of this species have been studied in situ and under experimental conditions Larval emissions occurs in the Costa Brava from august to september. Larvae have a short period of free life and prove to be unselctive to the nature and orientation of the substrate: they settle on any type of rough surfaces. No response to light gradients has been observed; but during lhe first hours of free life, larvae display a negative geotaxis which is changed into a positive one at the pre-settlement time. The aquiferous syslem begins to develop 5 days after the attachment of the larvae and the rhagon structure is completed in 7 days

11 pages, 2 figures

Peer reviewed

Keywords

larval development, Hymeniacidon sanguinea, Reproduction, Polifera, Desarrollo larvario, Esponjas, Reproducción

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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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