Effects of water exchange regimes on growth, survival and shell normality of the hatchery reared juvenile spotted babylon (Babylonia areolata Link 1807) in a recirculating seawater system

Abstract

Growth, survival and shell normality of hatchery reared juvenile Babylonia areolata were examined at four water exchange regimes of 0, 15, 30 and 60 day intervals in a recirculating seawater system over a 120 day experimental period. Higher body weight gains and shell length increments were observed in snails held at water exchange of 15 day intervals, especially when compared with those held at water exchange of 60 and 0 day intervals (P < 0.05). Water exchange affected the final survival of B. areolata. At the end of the experiment, final survival rates were 65.47 ± 0.66%, 87.48 ± 0.67%, 86.34 ± 0.92% and 78.50 ± 3.26% for snails held in the water exchange treatments of 0, 15, 30, and 60 day intervals, respectively, and those of shell abnormality were 97.65 ± 1.04%, 93.09 ± 2.34%, 97.08 ± 1.18% and 96.71 ± 1.84%, respectively. The present study concluded that water exchange regimes of the recirculating system influenced growth, survival, shell normality and water quality of the recirculating culture system for this species.

Growth and water quality for growing-out of juvenile spotted Babylon, Babylonia areolata, at different water-exchange regimes in a large-scale operation of earthen ponds

“…The low growth at water exchange of 30-day intervals in this study indicates that B. areolata were not able to grow-out in earthen pond culture system for a long period of water-exchange interval of 30 days. A similar result was verified by Kritsanapuntu et al (2006a) in a recirculating seawater system; the higher body weight gains and shell length increments were observed in snails held at water exchange of 15-day intervals, especially when compared with those held at water exchange of 30-and 60-day intervals and no water exchange. Water exchange affected the final survival of B. areolata.…”

“…With one exception, the total alkalinity showed the greatest changes during the culture period for all water-exchange treatments, ranging from 58.67-97.50 mg/l. The total alkalinity of the water-exchange treatment of 30-day interval reduced about 50% of natural seawater.In a similar result verified by Kritsanapuntu et al (2006a) in a recirculating seawater system, there were significant differences in each parameter of water quality among the water-exchange treatments of 15-, 30-and 60-day intervals and no water exchange (Table 3). Seawater temperature, salinity, pH, alkalinity, dissolved oxygen, nitrite-nitrogen and ammonia-nitrogen throughout the experiment ranged from 27.…”

Effects of stocking density and water exchange regimes on growth and survival of juvenile spotted babylon,Babylona areolata(Link), cultured in experimental earthen ponds

“…The low growth at water exchange of 30‐day intervals in this study indicates that B. areolata were not able to grow out in a earthen pond culture system for a long period of water exchange interval of 30 days. A similar result was verified by Kritsanapuntu, Chaitanawisuti, Santhaweesuk and Natsukari (2006)– higher body‐weight gains and shell‐length increments were observed in snails held at water exchange of 15‐day intervals, especially when compared with those held at water exchanges of 30‐, 60‐ and 0‐day intervals. Water exchange affected the final survival of B. areolata .…”

Path Analysis and Curve Estimates of Morphometric Attributes Effects on Body Weight of Two-Month-Old Babylonia areolata

“…And it is also an important economically farmed shellfish in the southeast coast of China. At present, the cultivation technology of B. areolata relatively mature (Kritsanapuntu, 2006;Zheng, 2015). Its nutritional requirements are also relatively clear (Yang, 2013).…”