First onboard fertilization of Asian seabass, Lates calcarifer: effects of egg stocking density on the fertilization, hatching and survival rate

This trial aimed to evaluate effects of stocking densities of 1-5 fish/m2 on growth performance, survival rate and economic efficiency of Asian seabass (Lates calcarifer) in earthen ponds. Fish with an initial length of 90.7 ± 0.1 mm and weight of 20.8 ± 0.1 g/fish and ponds with 600 m2 each and 1.5 m depth were used for this study. Experiment was designed with three treatments, including different stocking densities of 1, 3 and 5 fish/m2. The fish was fed with pellete feed containing 43 - 44% crude protein. Water quality parameters including temperature, dissolved oxygen, pH, salinity, transparency and ammonia concentration were measured once a week. Fish were sampled every 30-day intervals for length and weight measurement then for their growth estimation. Costs were recorded for economic efficiency estimation. Results showed that the water quality parameters were in suitable ranges for growth and development of Asian seabass. The final average length and weight of density 1 fish/m2 was significantly higher than those at 3 and 5 fish/m2 (P < 0.05). However, there was no significant difference on the fish growth in terms of daily length and weight gain, as well as survival rate and feed conversion ratio between different stocking densities. Asian seabass culture at 3 and 5 fish/m2 resulted in a higher profit compared to at 1 fish/m2. The highest economic efficiency in terms of area pond was showed at 5 fish/m2 treatment.

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Chronic stress due to high stocking density in open sea cage farming induces variation in biochemical and immunological functions in Asian seabass (Lates calcarifer, Bloch)

Fish Physiology and Biochemistry ◽

10.1007/s10695-014-9909-8 ◽

2014 ◽

Cited By ~ 1

Author(s):

Narasimhulu Sadhu ◽

S. R. Krupesha Sharma ◽

Shoji Joseph ◽

Praveen Dube ◽

K. K. Philipose

Keyword(s):

Chronic Stress ◽

Stocking Density ◽

Lates Calcarifer ◽

Asian Seabass ◽

Open Sea ◽

Sea Cage

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Effects of different protein hydrolysate products and levels on growth, survival rate and digestive capacity in Asian seabass ( Lates calcarifer Bloch) larvae

Aquaculture ◽

10.1016/j.aquaculture.2014.03.004 ◽

2014 ◽

Vol 428-429 ◽

pp. 195-202 ◽

Cited By ~ 21

Author(s):

Manee Srichanun ◽

Chutima Tantikitti ◽

Trond M. Kortner ◽

Åshild Krogdahl ◽

Rutchanee Chotikachinda

Keyword(s):

Survival Rate ◽

Protein Hydrolysate ◽

Lates Calcarifer ◽

Digestive Capacity ◽

Asian Seabass

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Growth Performance and Survivability of the Asian Seabass Lates Calcarifer Reared Under Hyper-Saline, Hypo-Saline and Freshwater Environments in a Closed Aquaculture System

10.21203/rs.3.rs-211072/v1 ◽

2021 ◽

Author(s):

Habib Ul Hassan ◽

Qadeer Mohammad Ali ◽

Zubia Masood ◽

Mohammad Abdul Momin Siddique

Keyword(s):

Survival Rate ◽

Growth Performance ◽

Feeding Rate ◽

Sea Bass ◽

Salinity Treatment ◽

Lates Calcarifer ◽

Asian Seabass ◽

Treatment Groups ◽

Health Indices ◽

Asian Sea Bass

Abstract Salinity is one of the most critical environmental parameters regarding fish physiology, modifying food intake and growth performance in many fish species. The present study has investigated the effects of different salinity levels on growth performance, feeding and survival of Asian seabass Lates calcarifer juveniles. Asian seabass juveniles were reared at 0, 5, 22, 36, and 42 ppt salinity. One five hundred ninety-eight fish individuals with an average weight 1.2 ± 0.11 g were randomly distributed (166 fish/Tank) in 5 concrete tanks (30×6×4 feet) each; length × width × depth) and volume 19,122 L, for total forty days. Initially feeding rate of 6% biomass per day with 42% crude protein-containing diets daily. The feeding rate adjusted according to fish biomass every week. The results showed that salinity level had a significant effect on the weight gain, average daily weight gain, specific growth rate, feed conversion ratio, survival rate, total biomass and health indices (p < 0.05). The highest WG (39.11±1.49 g), ADWG, (1.00±0.12 g), SGR (8.74±0.03 % d-1) and lowest FCR (0.96±0.20) observed with T3 (22 ppt salinity) treatment, which was significantly higher compared to other treatment groups (p < 0.05). Among the health indices, the highest hepatosomatic index and viscerosomatic index found with 22 ppt salinity treatment, which was also significantly higher than the other treatment groups (p < 0.05). No significant differences were found among the treatments in terms of survival rate (p > 0.05), but the maximum survival rate (98.89±0.0 %) in T3 (22 ppt) and T2 (5 ppt). The maximum level of crude proteins (19.99±1.4%) was found in the whole-body biochemical composition (% of wet weight) of Asian sea bass juveniles in T3 treatment group reared at 22 ppt salinity. The second-order polynomial regression showed that 20 ppt salinity is optimum for the best growth of Asian sea bass. Thus, our present work would provide valuable information to the fish farmers for culturing the sea bass as well as its management along the inland and coastline of Pakistan.

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