The aim of this research was to determine the effects of adding red seaweed meal rich in ultravio... more The aim of this research was to determine the effects of adding red seaweed meal rich in ultraviolet radiation absorbing compounds (UACs) to the diet of juvenile prawn Artemesia longinaris and its possible protective effects under stress by ultraviolet radiation (UVR). Three experimental diets were prepared: control diet (D) and two diets supplemented with red seaweed Grateloupia cf. turuturu meal at two inclusion levels (D1: 1g/100g; D2: 2g/100g). Three experiments were carried out: a) 45-day feeding, b) digestibility, and c) radiation exposure experiment. After the 45-day feeding experiment, no significant differences were found in growth and survival. Accumulation of UACs was detected only in animals fed D1 and D2, and concentration was significantly higher in animals fed D2, with concentrations (12.58 ± 3.50 OD g-1 ) and (3.17 ± 0.4 OD g-1 ) after 45-day feeding and after 7-day UVR exposure, respectively. After 7 days of exposure to different light treatments, significant differences were recorded inradical scavenging activities. In all UVR treatments, rapid signal decay was recorded in the first 5 minutes of reaction. The red seaweed Grateloupia cf. turuturumeal constitutes an interesting source of photoprotective compounds as an additive in the diet of A. longinaris.
El langostino Pleoticus muelleri y el camarón Artemesia longinaris son especies de interés comerc... more El langostino Pleoticus muelleri y el camarón Artemesia longinaris son especies de interés comercial distribuidas en la región sudoeste del Océano Atlántico, desde el sur de Brasil hasta la Patagonia (23-50 oS). Durante las pasadas dos décadas, se ha evidenciado un incremento de la radiación ultravioleta (RUV) y particularmente la UVB (280-315nm) sobre la superficie terrestre. Si bien los camarones penaeoideos son especies costeras que habitan en general a profundidades mayores a los 10m, bajo condiciones de cultivo se mantienen en estanques de 2 metros de profundidad, por lo que están expuestos a condiciones ambientales extremas.
The aim of this research was to determine the effects of adding red seaweed meal rich in ultravio... more The aim of this research was to determine the effects of adding red seaweed meal rich in ultraviolet radiation absorbing compounds (UACs) to the diet of juvenile prawn Artemesia longinaris and its possible protective effects under stress by ultraviolet radiation (UVR). Three experimental diets were prepared: control diet (D) and two diets supplemented with red seaweed Grateloupia cf. turuturu meal at two inclusion levels (D1: 1g/100g; D2: 2g/100g). Three experiments were carried out: a) 45-day feeding, b) digestibility, and c) radiation exposure experiment. After the 45-day feeding experiment, no significant differences were found in growth and survival. Accumulation of UACs was detected only in animals fed D1 and D2, and concentration was significantly higher in animals fed D2, with concentrations (12.58 ± 3.50 OD g-1 ) and (3.17 ± 0.4 OD g-1 ) after 45-day feeding and after 7-day UVR exposure, respectively. After 7 days of exposure to different light treatments, significant differences were recorded inradical scavenging activities. In all UVR treatments, rapid signal decay was recorded in the first 5 minutes of reaction. The red seaweed Grateloupia cf. turuturumeal constitutes an interesting source of photoprotective compounds as an additive in the diet of A. longinaris.
El langostino Pleoticus muelleri y el camarón Artemesia longinaris son especies de interés comerc... more El langostino Pleoticus muelleri y el camarón Artemesia longinaris son especies de interés comercial distribuidas en la región sudoeste del Océano Atlántico, desde el sur de Brasil hasta la Patagonia (23-50 oS). Durante las pasadas dos décadas, se ha evidenciado un incremento de la radiación ultravioleta (RUV) y particularmente la UVB (280-315nm) sobre la superficie terrestre. Si bien los camarones penaeoideos son especies costeras que habitan en general a profundidades mayores a los 10m, bajo condiciones de cultivo se mantienen en estanques de 2 metros de profundidad, por lo que están expuestos a condiciones ambientales extremas.
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