Larval rearing of barramundi (Lates calcarifer) in saline groundwater

Abstract

Barramundi (Lates calcarifer) larvae were reared from 2 to 25 days post hatch in 14‰ saline groundwater with either no potassium supplementation (38% K-equivalence) or full potassium supplementation (100% K-equivalence). Growth, survival and swimbladder inflation of these larvae were compared against those grown in control treatments of seawater (32‰) and seawater diluted to 14‰. Those reared in saline groundwater with 38% K-equivalence exhibited complete mortality within 2 days, while those held in groundwater with full supplementation survived at a rate equal to both control treatments (pooled average 51.1 ± 0.5%). At 25 days post hatch, there was no significant difference in larval length or dry weight between those grown in the 14‰ control treatment and those in the saline groundwater with full potassium supplementation. There were no significant differences in swim bladder inflation between any of the surviving treatments (average 93.3 ± 2.5%). This is the first description of rearing barramundi larvae both in low salinity seawater and in saline groundwater and demonstrates that the requirement for potassium by larval barramundi is higher than for juveniles of the same species.

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

“…Our results indicate that a salinity of ~33-39‰ is suitable for the survival of Asian Seabass larvae. Furthermore, Bosmans et al (2004), Schipp et al (2007), Partridge et al (2008), and Santhanam and Perumal (2012) showed that the survival rate of Asian Seabass larvae was approximately 29-58% in groups that were exposed to salinity levels of 14-33‰ from previous research groups and commercial hatcheries. Under conditions of increased salinity and temperature, the survival rate of Asian Seabass larvae was 20.73-39.9%.…”

Dietary protein requirement of white shrimp, Penaeus vannamei (Boone, 1931) juveniles, reared in inland ground water of medium salinity

“…This huge estimated target can only be achieved by vertical expansion of aquaculture practices, and conversion of unused and under‐utilized land and water resources for aquaculture operation with technological interventions. Absolutely unutilized salt‐affected land areas are more than 480 million hectares throughout the globe, and it is likely to be increased 50% more by 2050 (Jamil et al, 2011; Partridge et al, 2008). This huge areas and inland ground saline water (IGSW) are neither suitable for agricultural production nor fit for drinking purpose.…”

Salinity‐dependent changes in branchial morphometry and Na+, K+‐ATPase responses of euryhaline Asian sea bass, Lates calcarifer

“…Although the effects of salinity on the life cycle and growth performance of Asian sea bass have been extensively investigated (Jerry, 2013), little is known about the osmoregulatory response to changing environmental salinity. Some early studies have observed hematological and osmotic changes under salinity shock (Chu et al, 2004) and the effects of potassium deficiency at different salinities (Partridge et al, 2008). However, until recently, no research has focused on the molecular changes and alteration in gill morphology associated with osmoregulation in the Asian sea bass.…”