Evaluating the microbial effects of stocking freshwater snails (Physa gyrina) in water reuse systems culturing rainbow trout (Oncorhynchus mykiss)
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- Evaluating the microbial effects of stocking freshwater snails (Physa gyrina) in water reuse systems culturing rainbow trout (Oncorhynchus mykiss)
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A study was conducted to analyze the effects of snails (Physa
gyrina) on biofilm, bacterial abundance, off-flavor-producing bacteria,
and off-flavor compounds in reuse aquaculture systems culturing
rainbow trout (Oncorhynchus mykiss). Eight experimentalscale
systems were used, including four with and without snails.
Mean heterotrophic bacteria counts in water were lower (P < 0.05)
in systems with snails. Submerged surfaces of sumps containing
snails were nearly biofilm-free, while sumps without snails were
coated with biofilm. Geosmin levels in trout fillets from snailstocked
systems were generally lower but not statistically different
from the controls. Rainbow trout health and performance was not
affected by snail presence.
Originalsprog | Engelsk |
---|---|
Tidsskrift | Journal of Applied Aquaculture |
Vol/bind | 31 |
Udgave nummer | 2 |
Sider (fra-til) | 97-120 |
ISSN | 1045-4438 |
DOI | |
Status | Udgivet - 2019 |
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