AI SearchEffects of hardness and salinity on hatch and survival of nile tilapia (Oreochromis niloticus Linnaeus) eggs under hatcherry conditions.
Prasad, Bhagwat
Effects of hardness and salinity on hatch and survival of nile tilapia (Oreochromis niloticus Linnaeus) eggs under hatcherry conditions. - Pathum Thani, Thailand : Asian Institute of Technology, 2004 - 96 p. : ill. - Thesis ; no. AQ-04-26 . - Asian Institute of Technology. Thesis ; no. AQ-04-26 .
A thesis proposal for the partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development
Thesis (M.Sc.) - Asian Institute of Technology, 2004
Nile tilapia (Oreochromis niloticus) is the most dominant cultured species of the Tilapiine group. Despite the increasing importance of Nile tilapia in aquaculture and increasing demand of their quality seed from the hatcheries, hatch and survival of their eggs to swim-up fry highly variable (12% to 90%). Some studies on the effects of hardness and salinity of hatchery water on egg and larval survival have indicated the imp01iance of these two factors on the incubation success. But, the studies on the role of hardness and salinity of the hatchery water on the hatching and larval survival are lacking. The effects of hardness and salinity on the artificial incubation of Nile tilapia (Chitralada strain) eggs were examined through several experiments. Increasing hardness level to 500-4200 mg/L and 150-1200 mg/L CaC03 in two separate experiments resulted in higher percent survival (51.7% and 26.4%) from eggs to swim-up fry than those (30.3% and 6.1 %) obtained in their respective controls with hardness levels of 50 mg/L. No significant difference (P>0.05) among the percent survival was observed in the treatments with hardness levels of 500-4,200 mg/L and 150-1,200 mg/L respectively, in two experiments. In another experiment where the salinities were prepared by diluting seawater, 4%o resulted in significantly higher
Nile tilapia--Eggs
Fishes--Effect of water quality on
Effects of hardness and salinity on hatch and survival of nile tilapia (Oreochromis niloticus Linnaeus) eggs under hatcherry conditions. - Pathum Thani, Thailand : Asian Institute of Technology, 2004 - 96 p. : ill. - Thesis ; no. AQ-04-26 . - Asian Institute of Technology. Thesis ; no. AQ-04-26 .
A thesis proposal for the partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development
Thesis (M.Sc.) - Asian Institute of Technology, 2004
Nile tilapia (Oreochromis niloticus) is the most dominant cultured species of the Tilapiine group. Despite the increasing importance of Nile tilapia in aquaculture and increasing demand of their quality seed from the hatcheries, hatch and survival of their eggs to swim-up fry highly variable (12% to 90%). Some studies on the effects of hardness and salinity of hatchery water on egg and larval survival have indicated the imp01iance of these two factors on the incubation success. But, the studies on the role of hardness and salinity of the hatchery water on the hatching and larval survival are lacking. The effects of hardness and salinity on the artificial incubation of Nile tilapia (Chitralada strain) eggs were examined through several experiments. Increasing hardness level to 500-4200 mg/L and 150-1200 mg/L CaC03 in two separate experiments resulted in higher percent survival (51.7% and 26.4%) from eggs to swim-up fry than those (30.3% and 6.1 %) obtained in their respective controls with hardness levels of 50 mg/L. No significant difference (P>0.05) among the percent survival was observed in the treatments with hardness levels of 500-4,200 mg/L and 150-1,200 mg/L respectively, in two experiments. In another experiment where the salinities were prepared by diluting seawater, 4%o resulted in significantly higher
Nile tilapia--Eggs
Fishes--Effect of water quality on