Effect of reduced salinity on the initial mortality of Sprat, Spratelloides delicatulus (Bennett), in captivity

Abstract

The effect of exposure to different concentrations of sea water on the initial mortality of Spratelloides delicatulus, the common tuna-live-bait fish of Lakshadweep, was experimented. The shock mortality of the fish due to stress of capture was found to be greatly! reduced by introducing them at once in 50% sea water. However, the aggregate mortality from the time of capture to the end of the second day was least among the fish exposed to 75% sea water, being about three-fourth of the mortality in 100% sea water.