||Survival of Steelhead Trout (Salmo gairdneri) Eggs, Embryos, and Fry in Air-Supersaturated Water.
Nebeker, Alan V. ;
Andros, James D. ;
McCrady, Joel K. ;
Stevens, Donald G. ;
||Corvallis Environmental Research Lab., OR.
Water pollution ;
Salmo gairdneri ;
Gas bubble disease ;
Water pollution effects(Animals)
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||Egg, embryo, fry, and swim-up stages of steelhead trout (Salmo gairdneri) were exposed to water at total gas saturation levels ranging from 130 to 115%. Eggs, embryos, and newly hatched fry were not affected at 126.7%, but at about day 16 posthatch when the fish began swimming up deaths occurred rapidly, and at the end of the test post button-up mortality ranged from 99% at 126.7% saturation to 45% at 115.3% saturation. Bubbles in the mouth, gill cavity, and yolk sac caused flotation and severe respiratory difficulties. Rupture of yolk-sac membranes also caused death. No differences were noted in survival between fish exposed from egg to fry, and those exposed only from swim-up to fry stage. In summary, there were differences in susceptibility among steelhead life stages to air-supersaturated water; eggs, embryos, and pre-swim-up larvae were more resistant than swim-up and later fry stages.
||Pub. in Jnl. Fish. Res. Board Canada, v35 n2 p261-264, 1978. Summary in French.
|NTIS Title Notes
||Reprint: Survival of Steelhead Trout (Salmo gairdneri) Eggs, Embryos, and Fry in Air-Supersaturated Water.
|PUB Date Free Form
||19 Aug 77
||6T; 6F; 57Y; 57H; 68D; 98F
||PC A02/MF A01