Effect of Dissolved Oxygen on the Survival and Hatching of Eggs of Scale Carp

Abstract

Eggs of scale carp (Cyprinus carpio communis) were exposed to various levels of dissolved oxygen (DO) from fertilization to completion of hatching. Survival and hatching rate increased directly with increasing concentration of DO. Dissolved oxygen levels below 6.0 mg/1 appeared inadequate for proper survival. The retarding effect of reduced DO levels was less pronounced at early than at later stages of development.