Journal
ENVIRONMENTAL BIOLOGY OF FISHES
Volume 83, Issue 3, Pages 355-365Publisher
SPRINGER
DOI: 10.1007/s10641-008-9350-x
Keywords
Cryptobiosis; Mortality; Sperms; Eggs; Hatchlings
Categories
Funding
- Natural Sciences and Engineering Research Council of Canada
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Sexually matured rainbow trout, Oncorhynchus mykiss, were experimentally infected with the pathogenic Cryptobia salmositica. Spawning female trout were more susceptible to cryptobiosis than sexually mature males. Most infected females (seven of nine) with eggs died before or shortly after spawning while all (nine) infected males survived the disease. Also, none of the uninfected females died. Males initially increased milt production and sperm concentration; however semen production declined as the disease progressed. Sperm from infected males fertilized more eggs than those from non-infected males. No differences in weight and survival were observed between progeny of infected and uninfected males.
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