http://www.recercat.cat:80/handle/2072/4976 Thu, 23 May 2013 01:35:55 GMT 2013-05-23T01:35:55Z http://www.recercat.cat:80/bitstream/id/34911/ http://www.recercat.cat:80/handle/2072/4976 http://www.recercat.cat:80/handle/2072/208479 An integrated approach for the assessment of HAB dynamics in two NW Mediterranean bays from a GEOHAB perspective Bush, Julia A.; Cembella, Allan D., 1952-; Fernández-Tejedor, Margarita; Diogène Fadini, Jorge; Zielinski, Oliver Alfacs and Fangar Bay in the Ebro Delta, NW Mediterranean are the major sites in Catalonia for shellfish cultivation. These bays are subject to occasional closures in shellfish harvesting due to the presence of phycotoxins. Fish kills have also been associated with harmful algal blooms. The comparison of phytoplankton dynamics in both bays offers the opportunity to reveal differences in bloom patterns of species known to be harmful for the ecosystem and aquaculture activities. Field research is underway under the GEOHAB framework within the Core Research Project on HABs in Fjords and Coastal Embayments. The overall objective of this study is to improve our understanding of HAB biogeographical patterns, and key elements driving bloom dynamics in time and space within these semi-constrained embayments. Via the comparative approach we aim to improve the prediction for monitoring purposes, with a focus on Karlodinium spp. associated with massive kills of aquaculture species. This objective is addressed by incorporating long-term time series of phytoplankton identification and enumeration with the first results of recent field work in both bays. The latter includes the application of optical sensors, to yield a complementary view with enhanced spatial and temporal resolution of bloom phenomena. Fri, 01 Jan 2010 00:00:00 GMT http://www.recercat.cat:80/handle/2072/208479 2010-01-01T00:00:00Z http://www.recercat.cat:80/handle/2072/208425 Levels of PSP toxins in bivalves exposed to natural blooms of Alexandrium minutum in Catalan harbours Giménez Papiol, Gemma; Caillaud, A.; Cañete, E.; De la Iglesia González, Pablo; Eixarch Puigcerver, Helena; Fernández-Tejedor, Margarita; Franco, J.; Riobó, P.; Diogène Fadini, Jorge The development, validation, comparison and evaluation of analytical methods for marine toxins rely on the availability of toxic material. Within the project JACUMAR PSP, our interest is mainly focused on autochthonous bivalve species with the toxic profile of Alexandrium minutum, since this is the principal species involved regionally in PSP outbreaks. Mussels and oysters were exposed during few days in the harbor of Vilanova i la Geltrú, to blooms reaching a maximum A. minutum concentration of 200,000 cells L-1 in 2008, and 40,000 and 800,000 cells L-1, in 2009. Mussels, oysters and clams were exposed to one bloom of 22,000 cells L-1 in the harbor of Cambrils in 2009. In all situations higher toxic levels analyzed by HPLC-FD with postcolumn oxidation were observed in mussels (i.e. 1,200-2,500 μg eq. STX kg-1) than in oysters (i.e. 60-800 μg eq. STX kg-1) exposed to the same bloom. Blooms with higher concentrations of A. minutum did not correspond to higher levels of PSP toxins in bivalves. These differences may be explained by differences in A. minutum population dynamics, toxin production or in the physiological state or behaviour of shellfish. These results confirm that mussels concentrate more PSP toxins from A. minutum than oysters and clams. Fri, 01 Jan 2010 00:00:00 GMT http://www.recercat.cat:80/handle/2072/208425 2010-01-01T00:00:00Z http://www.recercat.cat:80/handle/2072/39527 Preliminary comparison of nutritional status of wild and culture broodstok of Senegal sole Norambuena Filcun, Fernando; Estévez García, Alicia; Andrés Roig, Mireia; Carazo Ortega, Ignacio; Duncan, Neil Tue, 01 Jan 2008 00:00:00 GMT http://www.recercat.cat:80/handle/2072/39527 2008-01-01T00:00:00Z http://www.recercat.cat:80/handle/2072/39526 Composición en ácidos grasos de huevos y larvas de dentón (Dentex dentex L.) de hasta 40 días en condiciones de cultivo Giménez Papiol, Gemma; Estévez García, Alicia; Henderson, R. James; Bell, J. Gordon Total lipid content and fatty acid (FA) composition of common dentex eggs spawned at different times and larvae reared under different culture conditions until 40 days post hatch (dph) were analysed in order to get a general pattern of lipid composition during larval development. Results were grouped according to the developmental stage of the larvae instead of age in dph. Saturated and monounsaturated fatty acids decreased along larval development, while polyunsaturated fatty acid (PUFA) content increased. The ratio of docosahexaenoic acid (DHA) / eicosapentaenoic acid (EPA) shifted from 4 – 5 in early developmental stages to lower than 1 after metamorphosis. Results suggest a subdivision of the larval development into two stages of opposite FA requirements. Mon, 01 Jan 2007 00:00:00 GMT http://www.recercat.cat:80/handle/2072/39526 2007-01-01T00:00:00Z http://www.recercat.cat:80/handle/2072/13338 Annual variation in quantity and quality of newly hatched larvae of Maja brachydactyla in captivity Andrés Roig, Mireia; Estévez García, Alicia; Simeó, Carles G.; Rotllant Estelrich, Guiomar Tue, 01 Jan 2008 00:00:00 GMT http://www.recercat.cat:80/handle/2072/13338 2008-01-01T00:00:00Z http://www.recercat.cat:80/handle/2072/12806 Cultivo larvario y requerimientos en ácidos grasos de dos nuevas especies para la acuicultura en Cataluña: el dentón (Dentex dentex) y el lenguado senegalés (Solea senegalensis) Estévez García, Alicia; Giménez Papiol, Gemma; Villalta Compte, Mireia Tue, 01 Jan 2008 00:00:00 GMT http://www.recercat.cat:80/handle/2072/12806 2008-01-01T00:00:00Z http://www.recercat.cat:80/handle/2072/12714 Arachidonic acid enriched live prey induce albinism in Senegal sole (Solea senegalensis) Villalta Compte, Mireia; Estévez García, Alicia; Bransden, Matthew Thu, 01 Jan 2004 00:00:00 GMT http://www.recercat.cat:80/handle/2072/12714 2004-01-01T00:00:00Z http://www.recercat.cat:80/handle/2072/4989 Aplicación de programas de gestión sanitaria en criaderos marinos Aguilera Jiménez, Cristóbal La primera necesidad de los peces es la higiene. La elaboración de Programas de Gestión Sanitaria (PGS) aplicables a la industria, dentro de un marco realista y eficiente, pueden contribuir positivamente a la mejora sistemática de la productividad, afectando no sólo a la cantidad y calidad del producto, sino directamente a la eficiencia económica de la empresa. Las principales normas deben quedar reflejadas dentro de un Plan de Control Sanitario (PCS) de la instalación, normas que deben ser de obligado cumplimiento, tanto para los trabajadores como para las visitas. El seguimiento del PCS se realiza mediante la aplicación de un Sistema de Análisis de Peligros y Puntos Críticos de Control (APPCC), sistema que forma parte, a su vez, del Sistema de Gestión de la Calidad (SGC). No será factible la aplicación de ninguno de estos programas, planes y sistemas sin un uso racional del autocontrol. Hygiene is the first need that fish have. The elaboration of the Sanitary Management Programs (SMP) which industrial application, inside a realistic and efficient framework, could contribute positively to the systematic improvement of the production, affecting not only to the quantity and quality of the product, but that affect directly to the economic efficiency of the company. The main norms will be reflected in a Sanitary Control Plan (SCP) of the facilities, these norms must be obligatory fulfilment for the workers and visits. The monitoring of the SCP will do meanly the application of the Hazard Analysis and Critical Control Point (HACCP), system that it is a part, also, of the Quality Management System (QMS). It is not possible, the application of any of this programs, plans and systems, without a rational use of the auto control processes. Sat, 01 Sep 2007 00:00:00 GMT http://www.recercat.cat:80/handle/2072/4989 2007-09-01T00:00:00Z