Quality of the cysts of Artemia franciscana collected at Tuticorin with observations on growth, maturity and sex ratio of the offspring

The cysts of the exotic species of brine shrimp Artemia franciscana collected from the natural ecosystem at Tuticorin during January 2001 were processed, stored and their quality evaluated. A total of 22 experiments were conducted on hatching and it was observed that the time taken for first hatching ranged from 13 hours and 10 minutes to 17 hours. The maximum hatching percentage recorded at 24 hours and 48 hours were 52.0 and 79.9 respectively. The I instar obtained from the hatching experiments were reared in outdoor culture tanks at 30, 50, and 70 ppt with two different types of feed and the maximum size of 10.04 ± 0.3 mm was recorded on 18th day in the animals fed with rice bran at 70 ppt. The earliest first pairing and first spawning were recorded on 6th and 12th days respectively in the animals fed with mixed phytoplankton at 50 ppt

Production of cysts and biomass of the exotic species of brine shrimp Artemia franciscana (Kellog) in out-door culture system

The production of cysts and biomass of the exotic species of brine shrimp Artemia franciscana was studied for a period of 90 days in out- door culture system at a salinity range of 38 to 83 ppt. From the initial stocking density of 231 to 294 nauplii / 700 l of brine the population density steadily increased and reached the maximum of 389.7 to 565.3 numbers / l on 38th day of culture. The total quantity of cysts and biomass harvested from the culture system ranged from 26.450 g to 33.860 g and from 813.6 g to 1226.7 g respectively. The first maturity and first spawning were recorded at the age of 7-8 and 12-13 days respectively and the maximum density of 59.3 riding pairs / l was recorded on 59th day of culture . The prospect of the culture of the exotic species is discussed in this pap

Not Available

Not AvailableThe cysts of the exotic species of brine shrimp Artemia franciscana collected from the natural ecosystem at Tuticorin during January 2001 were processed, stored and their quality evaluated. A total of 22 experiments were conducted on hatching and it was observed that the time taken for first hatching ranged from 13 hours and 10 minutes to 17 hours. The maximum hatching percentage recorded at 24 hours and 48 hours were 52.0 and 79.9 respectively. The I instar obtained from the hatching experiments were reared in outdoor culture tanks at 30, 50, and 70 ppt with two different types of feed and the maximum size of 10.04 ± 0.3 mm was recorded on 18th day in the animals fed with rice bran at 70 ppt. The earliest first pairing and first spawning were recorded on 6th and 12th days respectively in the animals fed with mixed phytoplankton at 50 ppt.Not Availabl

Not Available

Not AvailableThe production of cysts and biomass of the exotic species of brine shrimp Artemia franciscana was studied for a period of 90 days in out- door culture system at a salinity range of 38 to 83 ppt. From the initial stocking density of 231 to 294 nauplii / 700 l of brine the population density steadily increased and reached the maximum of 389.7 to 565.3 numbers / l on 38th day of culture. The total quantity of cysts and biomass harvested from the culture system ranged from 26.450 g to 33.860 g and from 813.6 g to 1226.7 g respectively. The first maturity and first spawning were recorded at the age of 7-8 and 12-13 days respectively and the maximum density of 59.3 riding pairs / l was recorded on 59th day of culture . The prospect of the culture of the exotic species is discussed in this papeNot Availabl

Not Available

Not AvailableThe production of cysts and biomass of the exotic species of brine shrimp Artemia franciscana was studied for a period of 90 days in out- door culture system at a salinity range of 38 to 83 ppt. From the initial stocking density of 231 to 294 nauplii / 700 l of brine the population density steadily increased and reached the maximum of 389.7 to 565.3 numbers / l on 38th day of culture. The total quantity of cysts and biomass harvested from the culture system ranged from 26.450 g to 33.860 g and from 813.6 g to 1226.7 g respectively. The first maturity and first spawning were recorded at the age of 7-8 and 12-13 days respectively and the maximum density of 59.3 riding pairs / l was recorded on 59th day of culture . The prospect of the culture of the exotic species is discussed in this papeNot Availabl