RESUMO
Nursery performance, development, and RNA:DNA ratio were investigated in Farfantepenaeus paulensis (Pérez-Farfante, 1967) postlarvae acclimated from a salinity of 30 to higher (35) or lower (16, 22 and 29) salinities and reared for 20 days. Overall, higher final weight, yield and growth rate were observed at a salinity of 29. RNA:DNA ratio indicated reduced growth potential at a salinity of 35. Low salinities resulted in more developed individuals. Thus, early postlarval F. paulensis should not be stocked in salinities higher than that of the original hatchery, otherwise in lower salinities postlarvae should be older and/or have an extended nursery phase. Results may assist in the development of nursery rearing protocols for F. paulensis, an alternative species for aquaculture in subtropical areas.
RESUMO
Nursery performance, development, and RNA:DNA ratio were investigated in Farfantepenaeus paulensis (Pérez-Farfante, 1967) postlarvae acclimated from a salinity of 30 to higher (35) or lower (16, 22 and 29) salinities and reared for 20 days. Overall, higher final weight, yield and growth rate were observed at a salinity of 29. RNA:DNA ratio indicated reduced growth potential at a salinity of 35. Low salinities resulted in more developed individuals. Thus, early postlarval F. paulensis should not be stocked in salinities higher than that of the original hatchery, otherwise in lower salinities postlarvae should be older and/or have an extended nursery phase. Results may assist in the development of nursery rearing protocols for F. paulensis, an alternative species for aquaculture in subtropical areas.
RESUMO
Nursery performance, development, and RNA:DNA ratio were investigated in Farfantepenaeus paulensis (Pérez-Farfante, 1967) postlarvae acclimated from a salinity of 30 to higher (35) or lower (16, 22 and 29) salinities and reared for 20 days. Overall, higher final weight, yield and growth rate were observed at a salinity of 29. RNA:DNA ratio indicated reduced growth potential at a salinity of 35. Low salinities resulted in more developed individuals. Thus, early postlarval F. paulensis should not be stocked in salinities higher than that of the original hatchery, otherwise in lower salinities postlarvae should be older and/or have an extended nursery phase. Results may assist in the development of nursery rearing protocols for F. paulensis, an alternative species for aquaculture in subtropical areas.