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Marine Ecology Progress Series

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MEPS 551:185-199 (2016)  -  DOI:

Sex and reproductive cycle affect lipid and fatty acid profiles of gonads of Arbacia dufresnii (Echinodermata: Echinoidea)

Erica V. Zárate1, M. Enriqueta Díaz de Vivar2,*, Marisa G. Avaro2, Lucía Epherra3, Mary A. Sewell

1School of Biological Sciences, University of Auckland, New Zealand
2Laboratorio de Química de Organismos Marinos (LABQUIOM), Facultad de Ciencias Naturales, Sede Puerto Madryn, Universidad Nacional de la Patagonia San Juan Bosco, Puerto Madryn, Chubut, Argentina
3Centro Nacional Patagónico, CONICET, Puerto Madryn, Chubut, Argentina
*Corresponding author:

ABSTRACT: Analysis of the lipid composition of gonads allows differentiation between energy and structural lipids, which is important for understanding lipid utilization during gametogenesis. Fatty acids, which are frequently used as biomarkers in trophic ecology studies, are also a useful companion to lipid studies and provide a detailed understanding of a species’ reproductive cycle. We examined the influence of sex and the reproductive cycle on the lipid and fatty acid profiles of gonads in the sea urchin Arbacia dufresnii. In a population from Nuevo Gulf, Argentina, we found significant changes in total lipid concentration, lipid profile and fatty acid profile throughout the reproductive cycle. Ovaries and testes containing fully mature gametes differed in total lipid concentration (higher in the ovaries), lipid profile (more energy lipids in ovaries and more structural lipids in testes) and fatty acid profile (differed by sex, not only in the variety of fatty acids present but in the degree of unsaturation). Our results show that differences in lipid and fatty acid profiles caused by sex and gonadal reproductive stage need to be considered when these tools are used as biomarkers in ecological studies.

KEY WORDS: Sea urchin · Gametogenesis · Lipid cycle · Fatty acid cycle

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Cite this article as: Zárate EV, Díaz de Vivar ME, Avaro MG, Epherra L, Sewell MA (2016) Sex and reproductive cycle affect lipid and fatty acid profiles of gonads of Arbacia dufresnii (Echinodermata: Echinoidea). Mar Ecol Prog Ser 551:185-199.

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