
%0 Journal Article
%A Bacher, GL 
%A O'Brien, TA 
%T Salinity tolerance of the eggs and larvae of the Australian grayling, <I>Prototroctes maraena</I> Gnnther (Salmoniformes : Prototroctidae)
%J Marine and Freshwater Research
%D 1989/04/01
%V 40
%N 2
%P 227-230
%K 
%R https://doi.org/10.1071/MF9890227
%U https://www.publish.csiro.au/paper/MF9890227 
%X Eggs of the Australian grayling Prototroctes maraena were fertilized in the laboratory and the survival of eggs and larvae was investigated in salinities ranging from <0.1 to 30 g L-1. In salinities of <0.1, 5, 10 and 15 g L-1, most (81-90%) eggs survived to hatching; in salinities of 20, 25 and 30 g L-1, all eggs died. In salinities of <0.1 and 5 g L-1, all eggs that survived developed normally and the larvae survived for 21 d. In a salinity of 10 g L-1, all eggs that survived developed normally but the larvae were inactive and died within 6 h. In a salinity of 15 g L-1, many larvae were unable to emerge completely from the egg, were grossly deformed and died within 1 h of hatching. Newly hatched larvae were buoyant, positively phototropic and swam actively near the water surface. They survived in salinities ranging from <0.1 to 30 g L-1 for 21 d, at which time yolk absorption was complete. Death was probably the result of starvation. 
