Combined effects of water exchange regimes and calcium carbonate additions on growth and survival of hatchery-reared juvenile spotted babylon (Babylonia areolata Link 1807) in recirculating grow-out system

Abstract

To determine a suitable culture environment to maximize growth and survival, the hatchery-reared juvenile spotted babylon, Babylonia areolata, were held in plastic rearing tanks at four calcium carbonate additions of 0,100 and 300 g tonne À1 , and four water exchange regimes of 0-,15-,30-and 60-day intervals in a recirculating grow-out system for120 days. The results clearly showed that growth was greatest between water exchange regimes of 15-and 30-day intervals and all calcium carbonate additions, with water exchange regimes of 0-and 60-day intervals resulting in poor growth. Final survival was highest between water exchange regimes of 15-and 30-day intervals, and all calcium carbonate additions, with water exchange regimes of 0-day intervals and all calcium carbonate additions resulting in high mortalities. This study showed that water exchange regimes had a stronger in£uence on the growth of juvenile B. areolata than calcium carbonate additions. It is recommended that B. areolata juveniles be maintained within the water exchange regimes range of 15^30-day intervals and at calcium carbonate additions between 0 and 500 g tonne À1 , providing optimum conditions for production of this species in a recirculating grow-out system.

Combined effects of temperature, salinity and rearing density on growth and survival of juvenile ivory shell, Babylonia areolata (Link 1807) population in Thailand

“…(2) If temperature and rearing densities were high, a change in the physicochemical properties of water, and an associated decline in water quality, in the breeding tank would occur. Kritsanapuntu, Chaitanawisuti, Santhaweesuk and Natsukari (2006) stated that if breeding occurred at high rearing densities, metabolism would increase and ammonia and nitrite concentration would increase, leading to a decline in the water quality. Concentrations of NH 3 increase with rising temperatures and pH and decrease with elevated salinity (Downing & Merkens 1955).…”

Effects of dietary calcium and phosphorus supplementation on the growth performance of juvenile spotted babylon Babylonia areolata culture in a recirculating culture system

“…Uptake of Ca and other minerals from seawater in a recirculating system may not be sufficient to meet the mineral requirements for shell building of the spotted babylon (Chaitanawisuti et al 2005;Kritsanapuntu et al 2006). However, studies of its mineral requirements are scarce.…”

Effects of Water Depth and Water Flow Duration on Growth and Survival of Juvenile Spotted Babylon (Babylonia areolata) Cultured in a Flow-Through System

“…However, Kritsanapuntu, Chaitanawisuti, Santhaweesuk and Natsukari (2006a) examined the growth, survival, and shell normality of juvenile B. areolata at four water exchange regimes of 0, 15, 30, and 60 day intervals in a recirculating seawater system over a 120 day experimental period. The study concluded that the water exchange regimes of the recirculating system influenced growth, survival, shell normality, and water quality of the culture system for this species.…”