Growth and Survival of Brown Shrimp (Farfantepenaeus aztecus) in a Closed Recirculation Seawater System at Different Salinities

Abstract

Growth and survival of juvenile brown shrimp (Farfantepenaeus aztecus) in a closed recirculation seawater system at two salinities (33 and 38 parts per thousand) were evaluated during 4 weeks in experimental tanks. Although the specific growth rate (SGR) was slightly higher at the treatment of 38 parts per thousand than at 33 parts per thousand, no significant differences were detected for the different time intervals analyzed; however, the growth in terms of both body weight and total length was significantly faster at 38 parts per thousand. In this regard, the increase in weight and total length obtained at 38 parts per thousand were 0.33 g/week and 2.15 mm/week, respectively, whereas at 33 parts per thousand were 0.21 g/week and 1.34 mm/week. Survival was not significantly different between than in the lower one (89.1 +/- 3.07\%). Results of this study suggest that the brown shrimp (F. aztecus) reared in a closed recirculation seawater system produce faster growth at 38 than at 33 parts per thousand salinities.