IIMYC   23581
INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
EFFECT OF ADDING PHOTOPROTECTIVE COMPOUNDS IN THE DIET OF Pleoticus muelleri
Autor/es:
MARCOVAL, M.A,; ARZOZ, N.S.; FENUCCI, J.L.; DÍAZ, A.C.; ESPINO, M.L.
Lugar:
Lima
Reunión:
Congreso; LAQUA 2016; 2016
Institución organizadora:
WORLD AQUACULTURE SOCIETY
Resumen:
Pleoticus muelleri is a species of commercial interest distributed in the Southwestern region of the Atlantic Ocean fromSouthern Brazil to Patagonia (23-50°S). During the past two decades, it has shown an increase in ultraviolet radiation (UVR)and particularly the UVB (280-315nm) above Earth?s surface. While penaeoid shrimps are coastal species that inhabitgenerally at depths greater than 10 m, under culture conditions are kept in ponds at 2 meters deep, so they are exposed toextreme environmental conditions. It has been shown that many species of macroalgae synthesize and accumulate highconcentrations of photoprotective compounds and may constitute an interesting alternative as a supplement in aquaculturefeeds. The aim of this study was to determine the bioaccumulation of photoprotective compounds from a diet added withred seaweeds meal on juveniles P.muelleri and its possible protective effects under conditions of stress by ultravioletradiation.Juveniles of P. muelleri approximately 5g, were obtained from a commercial fisherman from the coastal waters of Mardel Plata, Argentina (38°S 57º 33?W). Previous to the experiment with radiation, the animals were placed in 2 PVC tanksunder controlled conditions of temperature, pH, salinity, and photosynthetically active radiation (PAR) under two feedingtreatments. One group fed with basal diet (B) (45% protein, 8% lipid, 7% water and 7% ash) and the other with diet addedwith 1% red seaweed meal of the family Halymeneaceae (D1). After 20 days animals were subjected to three radiationtreatments, by triplicate: a) Control PAR (400-700nm) and diet B b) PAR+ UVR (280-700nm) and diet B and c) PAR+UVR (280-700nm) and diet D1. Survival, percentage of weight gain, concentrations of carotenoids and photoprotectivecompounds (PC) were determined. In treatment B mortality of 23% was recorded after 72 hours of exposition to UVR,while in those fed with the added diet mortality was observed after 120 h of exposure. Survival in control treatment was100%. At the end of the exposure period, percentage of weight gain was higher in animals fed diet D1 and the concentrationof PC was significantly higher in animals fed with diet D1 (p