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Communications: Tolerance of Rainbow Trout to Dissolved Oxygen Supplementation and a Yersinia ruckeri Challenge
Author(s) -
Caldwell Colleen A.,
Hinshaw Jeffrey M.
Publication year - 1995
Publication title -
journal of aquatic animal health
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 52
eISSN - 1548-8667
pISSN - 0899-7659
DOI - 10.1577/1548-8667(1995)007<0168:ctortt>2.3.co;2
Subject(s) - yersinia ruckeri , rainbow trout , biology , oxygen , zoology , fish <actinopterygii> , fishery , ecology , chemistry , organic chemistry
Dissolved oxygen accounted for a significant proportion of the variation in mortality rate of rainbow trout Oncorhynchus mykiss acclimated for 10 weeks to a range of dissolved oxygen levels and challenged with Yersinia ruckeri . Moderate levels of oxygen supersaturation (150%) resulted in greater cumulative mortality (17.9%) among fish exposed to a 0.5‐h static bath challenge with Y. ruckeri (1 × 10 7 colony‐forming units/mL). In contrast, hypoxic (70%) and normoxic (100%) levels of dissolved oxygen resulted in 12.8% and 10% cumulative mortality. Higher oxygen levels provided no additional “protection” against infection by Y. ruckeri in this study.