Efectos de la salinidad sobre el desarrollo de embriones de Cryphiops caementarius (Crustacea: Palaemonidae) incubados in vitro

The aim of this work was to study the effects of salinity on the development of embryos of Cryphiops caementarius incubated in vitro. We used embryos of early development, from a unique female. The incubators were of 400 mL, with 4 salinity treatments of 0, 10, 20 and 30 , three replicates, and 200 embryos each incubator. The 80% of the water was renewed frequently. The salinities between 0 and 30 did not affect the development of the embryos up to the stage 6. The salinities of 10 and 20 caused delay of the development of the stages 7 and 8; and the salinity of 30 caused death of the stage 7. In freshwater the 70,3% of the embryos survived and larvae were normal; on the other hand in salinity at 10 to 13,5% and 20 only 7,9% achieved larvae hatch but with deformations.