Effects of High Salinity on the Larviculture of Asian Seabass Latescalcarifer in Outdoor Systems

Abstract

This study estimated the survival rate and growth performance in the larviculture of Asian Seabass Lates calcarifer in extensive outdoor conditions at different levels of salinity (33, 36, 39, and 42‰) at 33.3-38.0°C. The experiments were conducted in triplicate with 1,000 larvae per outdoor 500-L fiber-reinforced plastic tank. The control group was maintained at a salinity level of 42‰ indoors. The larvae were manually counted 18 h after hatching, and larvae that were 1.26 mm in length were transferred to indoor and outdoor tanks with salinities of 33, 36, 39, and 42‰, where they were continuously monitored. To minimize cannibalism, the larvae were manually graded and monitored for survival after 14 d. The survival rate and growth performance of the developing larvae were monitored from day 21 to day 45. The best salinity level for larval survival outdoors was 33-39‰. There were significant differences between the indoor and outdoor systems in terms of survival rate (29-44%) and specific growth rate (7.5-10.5%). Overall, outdoor larviculture of Asian Seabass is feasible at 33-42‰ salinity levels.

Effects of High Salinity on Survival, Growth, and Reproductive performance of Red Tilapia (Oreochromis urolepis hornorum ♀× Oreochromis mossambicus ♂)

“…In contrast, Zhang et al (2016) found that small-scale Chinese fish producers were economically inefficient. Furthermore, Young et al (2021b) and Young and AlMoutiri (2022) reported that limiting environmental factors and higher-cost production facilities were more common in fish farming in Saudi Arabia.…”

“…The broodstock in all groups were randomly sampled and measured once every week between 06:00 and 08:00 h. Additionally, the fry were sampled once every 30 days to determine the survival rate, growth performance, and fry production. The formulation of growth performance was adopted from a previous record (Young et al, 2021a;Young and AlMoutiri, 2022).…”

Entirely Farm-raised Snubnose Pompano (Trachinotus blochii) Under High Salinity in Saudi Arabia

“…In contrast, Zhang et al (2016) found that small-scale Chinese fish producers were economically inefficient. Furthermore, Young and AlMoutiri (2021) reported that limiting environmental factors and higher-cost production facilities were more common in fish farming in Saudi Arabia.…”

“…For instance, overproduction has led to price reductions in Asian sea bass (Young et al 2020a). In addition, fingerlings of numerous marine fish species depend on imports (Young and AlMoutiri, 2021). Thus, the Saudi fisheries authority continues to promote marine fish species for further aquaculture development.…”

“…Regulations strictly prohibit the installation of pumping wells (Elhendy and Alzoom 2001; Young et al 2020a). Hence, freshwater consumption in most mariculture farms in Saudi Arabia is decreasing (Young and AlMoutiri, 2021).…”