Contributions for larval development optimization of Homarus gammarus

Abstract

Event Abstract Back to Event Contributions for larval development optimization of Homarus gammarus Pedro T. Sá1*, Sónia C. Marques2 and Sergio M. Leandro1 1 GIRM - Marine Resources Research Group; Polytechnic Institute of Leiria, School of Tourism and Maritime Technology, Portugal 2 University of Coimbra, CFE - Centre for Functional Ecology, Department of Life Sciences, Portugal The European lobster, Homarus gammarus, is considered one of the most important fishery resources in Europe, with high economic value and very appreciated seafood. However, in the last century their catch has been decreasing dramatically. Several restocking programs have been developed, but their larval development is quite demanding, hindering its cultivation. The present study aimed to contribute to increased knowledge about the larval development and growth of H. gammarus in order to optimize the protocols of captive cultivation. To fulfill these objectives, three complementary and distinct tests were performed, namely: (1) evaluate the effect of different lyophilized diets and live food, (2) evaluate the probiotic effect added to larval rearing and, finally, (3) define the relationship between the temperature effect and the larval development. The diet effect experiment, showed that the dry food, for this type of larval rearing, it is not suitable for H. gammarus larvae, resulting in 100% of mortality before reaching Zoea II, contrasting with the obtained results using live brine shrimp nauplii, with 4.17% survival to PL stage. The addition of probiotics in seawater, proved to be ineffective, with no differences in survival and growth rates, and intermoult period, compared to larvae grown without addition of probiotic in rearing water. The seawater rising temperature resulted in a decrease of intermoult period in all larval development stages and at all tested temperatures, ranging from 4.77 (Z1) to 16.5 days (Z3) at 16°C, whereas at 23°C, ranged from 3:02 (Z1) and 9.75 days (Z3). The results obtained are an extremely useful guide for future optimization of protocols on larval development of H. gammarus. Keywords: Homarus gammarus, larval rearing conditions, live and dry diets, probiotic, temperature effect Conference: IMMR | International Meeting on Marine Research 2014, Peniche, Portugal, 10 Jul - 11 Jul, 2014. Presentation Type: Poster Presentation Topic: AQUACULTURE Citation: Sá PT, Marques SC and Leandro SM (2014). Contributions for larval development optimization of Homarus gammarus. Front. Mar. Sci. Conference Abstract: IMMR | International Meeting on Marine Research 2014. doi: 10.3389/conf.fmars.2014.02.00074 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: 10 May 2014; Published Online: 18 Jul 2014. * Correspondence: Mr. Pedro T Sá, GIRM - Marine Resources Research Group; Polytechnic Institute of Leiria, School of Tourism and Maritime Technology, Peniche, Portugal, pedrotfsa@gmail.com 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 T Sá Sónia C Marques Sergio M Leandro Google Pedro T Sá Sónia C Marques Sergio M Leandro Google Scholar Pedro T Sá Sónia C Marques Sergio M Leandro PubMed Pedro T Sá Sónia C Marques Sergio M Leandro 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.