Effect of temperature on gonadal growth and maturation of Paracentrotus lividus (Lamarck, 1816)

Abstract

Event Abstract Back to Event Effect of temperature on gonadal growth and maturation of Paracentrotus lividus (Lamarck, 1816) Pedro M. Albano1, Susana M. F. Ferreira1, 2, Pedro M. Santos1, Andreia I. Raposo1, José Lino V. Costa3, Sílvia C. Gonçalves1, 4, Teresa M. Baptista1 and Ana Pombo1* 1 Escola Superior de Turismo e Tecnologia do Mar, Politécnico de Leiria, MARE – Marine and Environmental Sciences Centre, Portugal 2 University of Coimbra, CFE - Center for Functional Ecology, Department of Life Sciences, Portugal 3 Faculdade de Ciências, Universidade de Lisboa, MARE – Marine and Environmental Sciences Centre, Portugal 4 University of Coimbra, MARE – Marine and Environmental Sciences Centre, Department of Life Sciences, Faculty of Sciences and Technology, Portugal Paracentrotus lividus’ gonads are regarded as a gastronomical delicacy, being strongly appreciated by the Portuguese traditional fishing communities. Alongside of its appeal as a premium product, surges its overexploitation as a natural resource, which was once abundant. Therefore, optimizing the echinoculture of this species, by achieving a high-quality gonad (before gametogenesis), as well as balancing the human impact on the depleted natural populations, is of great interest and importance. In the present study, 204 wild adults of P. lividus (with diameter ranging from 3.0 to 4.3 cm) were collected from the coast of Peniche (Portugal) and subjected to starvation for 30 days, at 16 °C, for gonad reabsorption. At the end of this period, 24 individuals were sacrificed and weighed (body and gonadal weight) to assess their mean gonadosomatic index (GI). To test the effect of temperature in the gonadal growth and maturation of P. lividus, three replicate aquaria (50 L), each with 15 individuals, were subjected to one of the following temperatures: 18 °C, 20 °C, 22 °C and 24 °C. A jellified feed mix with vegetables and macroalgae was supplied to all systems, ad libitum, during 90 days. In the end of this trial, biological data were obtained (total weight, gonad weight and GI). Sea urchins’ genders and maturation stages were identified through histological analysis. There was positive sea urchins’ growth (total weight) in all temperatures, with a higher value at the temperature of 22 °C. The same temperature achieved a greater GI (9.25 ± 2.74), starting from 3.41 ± 1.62 after the starvation period. Through histological analysis, it was possible to observe that both males and females achieved a higher percentage of mature individuals (60.0 % and 46.7 %, respectively) at the temperature of 22 °C. It is worth to notice, however, that the temperature of 24 °C resulted in a higher percentage of individuals in spent stage (33.33 %) - the first stage of gonad maturation (with thin ascinal walls, appearing to be empty, except for the presence of some relict oocytes or spermatozoa). It can be concluded that, whilst all temperatures achieved positive results, the best results were obtained with the temperature of 22 °C, making it the most suited temperature for reproductive trials. On the other hand, it appears to be the least suited for growing gonads for human consumption, which seems to be more appropriate at a lower (18 °C) or higher (24 °C) temperature (given that gonads are more appreciated, in terms of flavour, at the growing and premature stages). Acknowledgements This project has the financial support of Operational Programme MAR2020 through the project 16-02-01-FMP-0004: Ouriceira Aqua: Aquaculture and Enhancement of Gonad Production in the Sea Urchin (Paracentrotus lividus). This study had the support of Fundação para a Ciência e Tecnologia (FCT), through the strategic project UID/MAR/04292/2013 granted to MARE - Marine and Environmental Sciences Centre. Keywords: sea urchin, Reproduction, Echinoculture, gonadosomatic index, echinoid, Echinodermata Conference: IMMR'18 | International Meeting on Marine Research 2018, Peniche, Portugal, 5 Jul - 6 Jul, 2018. Presentation Type: Poster Presentation Topic: Aquaculture Citation: Albano PM, Ferreira S, Santos PM, Raposo AI, Costa JV, Gonçalves SC, Baptista TM and Pombo A (2019). Effect of temperature on gonadal growth and maturation of Paracentrotus lividus (Lamarck, 1816). Front. Mar. Sci. Conference Abstract: IMMR'18 | International Meeting on Marine Research 2018. doi: 10.3389/conf.FMARS.2018.06.00127 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 26 Apr 2018; Published Online: 07 Jan 2019. * Correspondence: Dr. Ana Pombo, Escola Superior de Turismo e Tecnologia do Mar, Politécnico de Leiria, MARE – Marine and Environmental Sciences Centre, Peniche, Portugal, ana.pombo@ipleiria.pt Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Pedro M Albano Susana M. F. Ferreira Pedro M Santos Andreia I Raposo José Lino V Costa Sílvia C Gonçalves Teresa M Baptista Ana Pombo Google Pedro M Albano Susana M. F. Ferreira Pedro M Santos Andreia I Raposo José Lino V Costa Sílvia C Gonçalves Teresa M Baptista Ana Pombo Google Scholar Pedro M Albano Susana M. F. Ferreira Pedro M Santos Andreia I Raposo José Lino V Costa Sílvia C Gonçalves Teresa M Baptista Ana Pombo PubMed Pedro M Albano Susana M. F. Ferreira Pedro M Santos Andreia I Raposo José Lino V Costa Sílvia C Gonçalves Teresa M Baptista Ana Pombo Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.