Morphology and function of the lateral line of juvenile steelhead trout in relation to gas-bubble disease*

1976 ◽  
Vol 9 (3) ◽  
pp. 217-233 ◽  
Author(s):  
Douglas D. Weber ◽  
Michael H. Schiewe
1978 ◽  
Vol 35 (2) ◽  
pp. 261-264 ◽  
Author(s):  
Alan V. Nebeker ◽  
James D. Andros ◽  
Joel K. McCrady ◽  
Donald G. Stevens

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. Key words: trout, steelhead, supersaturation, gas-bubble disease, Salmo gairdneri, temperature, fish culture


2007 ◽  
Vol 16 (2) ◽  
pp. 104-112 ◽  
Author(s):  
Bruce H. Grahn ◽  
Cheryl Sangster ◽  
Carrie Breaux ◽  
Craig Stephen ◽  
Lynne Sandmeyer

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