Environmental parameters affecting embryonic development. Temperature affects embryonic of c.quadricarinatus,high temperatures result in shorter development duration, increased rate of energy use lower survival found that optimal temperatures for maintaining c.quadricarinatus eggs are from 22 to 25c wits 25c being better in terms of energy cnost and and lower protein use. reported that temperatures from 24 to30c are suitable for embryonic development of redclaw whereas 28 to 30c are the optimal temperatures. lt is possible that the defference between the two reports is attributable to variation in strain of redclaw used. Furthermore,embryonic development and hatching appear to be affected by salinity. found that hatching rate of redclaw decreases with an increase in sea water salinity