
TY  - JOUR
A1  - Bacher, GL 
A1  - O'Brien, TA 
T1  - Salinity tolerance of the eggs and larvae of the Australian grayling, <I>Prototroctes maraena</I> Gnnther (Salmoniformes : Prototroctidae)
JF  - Marine and Freshwater Research
JO  - Mar. Freshwater Res.
Y1  - 1989
VL  - 40
IS  - 2
SP  - 227
EP  - 230
KW  - 
UR  - https://doi.org/10.1071/MF9890227 
N2  - 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. 
ER  -

