Photoprotection Effects of Red Seaweed Meal (Grateloupia cf. Turuturu) as Feed Ingredient in Prawn Artemesia Longinaris

• Published in: Photochemistry and photobiology 2022-11, Vol.98 (6), p.1476-1485
• Main Authors: Arzoz, Natalia Soledad, Marcoval, Maria Alejandra, Diaz, Ana Cristina, Espino, Maria Laura, Velurtas, Susana M., Churio, Maria Sandra, Orallo, Dalila Elisabet, Fenucci, Jorge Lino
• Format: Article
• Language: English
• Subjects: Algae; Animal Feed - analysis; Animals; Diet; Digestibility; Grateloupia; Radiation effects; Rhodophyta; Scavenging; Seaweed; Seaweeds; Ultraviolet radiation; Ultraviolet Rays - adverse effects
• ISSN: 0031-8655; 1751-1097
• DOI: 10.1111/php.13636

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: 1 g/100 g; D2: 2 g/100 g). 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 min of reaction. The red seaweed Grateloupia cf. turuturumeal constitutes an interesting source of photoprotective compounds as an additive in the diet of A. longinaris. This article investigate the potential benefits of increased UV protective compounds from the red seaweed Grateloupia cf. turuturu in the rearing of the prawn Artemesia longinaris. Three experiments were carried out: (a) 45‐day feeding, (b) digestibility, and (c) radiation exposure experiment. The results of the present study show that the red seaweed Grateloupia cf. turuturu meal constitutes an interesting source of bioactive compounds such as photoprotective compounds (PPCs) with potential for application as an additive in the diet of Artemesia longinaris.