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Response of Post Larvae of Penaeus monodon (Fabricius, 1798) to Varying Temperatures


Affiliations
1 Department of Fisheries Hydrography, College of Fisheries, Shirgaon, Ratnagiri (M.S.), India
2 Department of Fisheries Engineering, College of Fisheries, Shirgaon, Ratnagiri (M.S.), India
     

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Temperature is a key environmental variable mainly influencing the survival and biological responses of the organisms. In order to understand the influence of temperature on survival and growth of post- larvae (PL 50) of tiger shrimp, Penaeus monodon, static bioassays as per standard methodology were undertaken. The 96 h LT50 value was found to be 32.2 °C. Rates of oxygen consumption were affected by temperature with direct relationship. The oxygen consumption rate of post-larva was the lowest (0.31 mg lit-1) at 28°C, while the highest was at 31°C (0.84 mg lit-1). One-way ANOVA test showed a significant temperature impact on average oxygen consumption rate of the post-larvae. The highest and lowest length and weight gains were observed at 29.5 and 31°C, respectively with a medium growth at 28°C. From the above, it may be concluded that the lethal/critical (maxima) temperature in shrimp thus, depend on acclimatizing temperatures, species, developmental stage and also other environmental variables.

Keywords

Growth, Oxygen Consumption, Penaeus monodon, Post Larvae, Temperature.
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  • Response of Post Larvae of Penaeus monodon (Fabricius, 1798) to Varying Temperatures

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Authors

Preetam B. Naik
Department of Fisheries Hydrography, College of Fisheries, Shirgaon, Ratnagiri (M.S.), India
Girish N. Kulkarni
Department of Fisheries Hydrography, College of Fisheries, Shirgaon, Ratnagiri (M.S.), India
Ankita S. Tekade
Department of Fisheries Hydrography, College of Fisheries, Shirgaon, Ratnagiri (M.S.), India
Rahul K. Sadawarte
Department of Fisheries Engineering, College of Fisheries, Shirgaon, Ratnagiri (M.S.), India

Abstract


Temperature is a key environmental variable mainly influencing the survival and biological responses of the organisms. In order to understand the influence of temperature on survival and growth of post- larvae (PL 50) of tiger shrimp, Penaeus monodon, static bioassays as per standard methodology were undertaken. The 96 h LT50 value was found to be 32.2 °C. Rates of oxygen consumption were affected by temperature with direct relationship. The oxygen consumption rate of post-larva was the lowest (0.31 mg lit-1) at 28°C, while the highest was at 31°C (0.84 mg lit-1). One-way ANOVA test showed a significant temperature impact on average oxygen consumption rate of the post-larvae. The highest and lowest length and weight gains were observed at 29.5 and 31°C, respectively with a medium growth at 28°C. From the above, it may be concluded that the lethal/critical (maxima) temperature in shrimp thus, depend on acclimatizing temperatures, species, developmental stage and also other environmental variables.

Keywords


Growth, Oxygen Consumption, Penaeus monodon, Post Larvae, Temperature.

References