Impact assessment in Solea senegalensis exposed to light of different wavelengths: growth, stress indicators and pigmentation

Abstract

Event Abstract Back to Event Impact assessment in Solea senegalensis exposed to light of different wavelengths: growth, stress indicators and pigmentation Pedro J. Pires1*, Teresa M. Baptista2 and Renata N. Serradeiro3 1 Escola Superior de Turismo e Tecnologia do Mar, Portugal 2 MARE – Marine and Environmental Sciences Centre, Portugal 3 Aquacria Piscícolas S.A., Portugal The overfishing, the increased protein demand and growth of the world population, mean that the increase in animal production is crucial to counteract these problems. Nowadays, many authorities support that aquaculture is a way to overcome these problems and this activity has the highest global expansion rate. However new obstacles arise with this expansion, either the pressure to correspond to society's standards and regulatory authorities. The Senegalese sole, Solea senegalensis, has a great potential for aquaculture, since it has a high economic value. However presents several problems including, susceptibility to disease, nutritional requirements and great dispersion in the size, among others. The knowledge of the production requirements for this specie is crucial to increase its success and improve productivity in the culture of sole. To clarify some of the parameters this study took place to evaluate the effect of light of different wavelengths in growth as well as haematological and immunological parameters and further changes in skin colouring at Solea senegalensis. This test was carried out at Aquacria Piscícolas S.A. facilities using twenty-seven thousand young fish which were divided into six tanks with a recirculating aquaculture system (RAS) and maintained under intensive culture conditions. Blue light was used with a wavelength of 400nm, white light with a wavelength of 450nm and a red light coated film in the control group. To analyse growth, samples of two hundred fish per tank were made. For haematological and immunological parameters withdrew blood from six fish per tank. With regard to skin coloration fifty fish per treatment were used. In all aspects related to growth indicators, white light appears to promote a higher development, reaching a percentage of 112% growth when compared with SEA8 growth curve. In haematological and immunological parameters, the results show that there is a decrease in the percentage of lymphocytes and thrombocytes. However the high glucose levels indicate that the fish are under stress. The analysis of the staining of the skin shows that the fish held in the control group exhibit brighter colour, responsible for a clearer appearance. In conclusion, the blue light appears to have no beneficial effect on both, fish growth and skin coloration. The white light seems to influence positively fish growth and the control group has the most satisfactory results in terms of skin coloration. Keywords: Solea senegalensis, Wavelengths, stress, Pigmentation, Growth Conference: IMMR | International Meeting on Marine Research 2016, Peniche, Portugal, 14 Jul - 15 Jul, 2016. Presentation Type: Poster presentation Topic: Aquaculture Citation: Pires PJ, Baptista TM and Serradeiro RN (2016). Impact assessment in Solea senegalensis exposed to light of different wavelengths: growth, stress indicators and pigmentation. Front. Mar. Sci. Conference Abstract: IMMR | International Meeting on Marine Research 2016. doi: 10.3389/conf.FMARS.2016.04.00051 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: 13 May 2016; Published Online: 13 Jul 2016. * Correspondence: Mr. Pedro J Pires, Escola Superior de Turismo e Tecnologia do Mar, Peniche, 2520-641, Portugal, ppires1992@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 J Pires Teresa M Baptista Renata N Serradeiro Google Pedro J Pires Teresa M Baptista Renata N Serradeiro Google Scholar Pedro J Pires Teresa M Baptista Renata N Serradeiro PubMed Pedro J Pires Teresa M Baptista Renata N Serradeiro 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.