Although several authors have suggested a plausible involvement of steroids in the reproductive biology of echinoderms, their definitive role is still poorly understood. In this paper we focused on oestradiol (E2), whose presence and variations were previously revealed in different echinoderm tissues. The aim of this investigation was to provide further information on the scarcely known role of this hormone in the reproductive biology of sea urchins. We injected two different concentrations (5 ng ml−1 and 50 ng ml−1) of 17ß-oestradiol into specimens of the common Paracentrotus lividus for 10 weeks. The E2 treatment did not influence the maturation stage of the gonads and the development of the gametes; it caused a slight decrease in the gonad index and an increase in lipid content. Our present results suggest that E2 could have a function different from that reported for vertebrates and suggested for other echinoderms such as asteroids.

Exploring endocrine regulation of sea urchin reproductive biology : effects of 17ß-oestradiol / M. Sugni, D. Motta, P. Tremolada, M.D. Candia Carnevali. - In: JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM. - ISSN 0025-3154. - 92:6(2012 Sep), pp. 1419-1426.

Exploring endocrine regulation of sea urchin reproductive biology : effects of 17ß-oestradiol

M. Sugni
Primo
;
P. Tremolada
Penultimo
;
M.D. Candia Carnevali
Ultimo
2012

Abstract

Although several authors have suggested a plausible involvement of steroids in the reproductive biology of echinoderms, their definitive role is still poorly understood. In this paper we focused on oestradiol (E2), whose presence and variations were previously revealed in different echinoderm tissues. The aim of this investigation was to provide further information on the scarcely known role of this hormone in the reproductive biology of sea urchins. We injected two different concentrations (5 ng ml−1 and 50 ng ml−1) of 17ß-oestradiol into specimens of the common Paracentrotus lividus for 10 weeks. The E2 treatment did not influence the maturation stage of the gonads and the development of the gametes; it caused a slight decrease in the gonad index and an increase in lipid content. Our present results suggest that E2 could have a function different from that reported for vertebrates and suggested for other echinoderms such as asteroids.
gonad; hormone regulation; oestradiol; reproduction; sea urchin
Settore BIO/05 - Zoologia
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/180758
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