The objective of this study was to investigate the effect of different water salinities on juvenile Hoplias lacerdae during feed training. Salinity levels of 0, 3, 6 and 9 g salt L-1 were used. Juveniles (3.33±0.1 cm and 0.6±0.09 g) were stocked at a density of six fish L-1 in aquaria (10 L volume) with supplementary aeration. Weight gain, length gain, and rates of survival, mortality, and cannibalism were evaluated after 20 days. Total mortality was observed in 0 g […]

Water is a nutrient of extreme importance for animals and must be considered vital in any rearing phase. The increasing scarcity of this precious natural resource has concerned different segments of society in order to find solutions for rational and sustainable use of this nutrient. Small ruminants, especially sheep and goats, have social and economic importance due to their great ability in adapting to adverse environmental conditions and using water efficiently. Thus, they might be a good alternative to mitigate […]

The objective of this work was the development of larviculture handling technics to rear trairao in slightly saline freshwater, with Artemia nauplii as live food. At the beginning of exogenous feeding, eight days after hatching, trairao larvae were counted and stocked in twelve 1.5-L vessels, equipped with aeration, at 10 larvae/L density. The vessels were distributed in three 130-L tanks filled with controlled temperature water (29.5ºC). The tanks were covered with black plastic to keep the environment dark, and uncovered […]