Abstract
Heterosporis sutherlandae is an emerging microsporidian fish parasite in the Great Lakes region. H. sutherlandae forms lesions in the muscle tissue of fishes important to aquaculture and sport fishing. These lesions render the filet inedible and may have fitness consequences. We evaluated the prevalence and severity of H. sutherlandae among yellow perch (Perca flavescens) in a known-positive Minnesota lake, and used an equilibrium yield model to evaluate impacts on harvest. Twenty-eight percent of the 400 yellow perch sampled were infected with H. sutherlandae. Males were 1.5 times more likely to be infected than females and were more severely infected. The presence of the parasite did not vary with relative weight or age, but infection severity was highest among older individuals that were in better condition. These results suggest that males are more susceptible to infection, and that infection is not associated with maturity or a gape-limiting food source. These results also suggest that heterosporosis increases in severity with time or by increased exposure. Our equilibrium yield model found that a 10% increase in mortality due to H. sutherlandae could result in 30% and 10% reductions in yield and mean catch weight, respectively. The results of this study direct future field sampling and laboratory experiments to further understand and predict the impacts of this parasite.
| Original language | English (US) |
|---|---|
| Article number | e0199580 |
| Journal | PloS one |
| Volume | 13 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jun 2018 |
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The prevalence and potential fisheries consequences of Heterosporis sutherlandae in a Minnesota lake. / Tomamichel, Megan M.; Hodgins, Nathaniel C.; Venturelli, Paul A.; Phelps, Nicholas B.D.
In: PloS one, Vol. 13, No. 6, e0199580, 06.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The prevalence and potential fisheries consequences of Heterosporis sutherlandae in a Minnesota lake
AU - Tomamichel, Megan M.
AU - Hodgins, Nathaniel C.
AU - Venturelli, Paul A.
AU - Phelps, Nicholas B.D.
PY - 2018/6
Y1 - 2018/6
N2 - Heterosporis sutherlandae is an emerging microsporidian fish parasite in the Great Lakes region. H. sutherlandae forms lesions in the muscle tissue of fishes important to aquaculture and sport fishing. These lesions render the filet inedible and may have fitness consequences. We evaluated the prevalence and severity of H. sutherlandae among yellow perch (Perca flavescens) in a known-positive Minnesota lake, and used an equilibrium yield model to evaluate impacts on harvest. Twenty-eight percent of the 400 yellow perch sampled were infected with H. sutherlandae. Males were 1.5 times more likely to be infected than females and were more severely infected. The presence of the parasite did not vary with relative weight or age, but infection severity was highest among older individuals that were in better condition. These results suggest that males are more susceptible to infection, and that infection is not associated with maturity or a gape-limiting food source. These results also suggest that heterosporosis increases in severity with time or by increased exposure. Our equilibrium yield model found that a 10% increase in mortality due to H. sutherlandae could result in 30% and 10% reductions in yield and mean catch weight, respectively. The results of this study direct future field sampling and laboratory experiments to further understand and predict the impacts of this parasite.
AB - Heterosporis sutherlandae is an emerging microsporidian fish parasite in the Great Lakes region. H. sutherlandae forms lesions in the muscle tissue of fishes important to aquaculture and sport fishing. These lesions render the filet inedible and may have fitness consequences. We evaluated the prevalence and severity of H. sutherlandae among yellow perch (Perca flavescens) in a known-positive Minnesota lake, and used an equilibrium yield model to evaluate impacts on harvest. Twenty-eight percent of the 400 yellow perch sampled were infected with H. sutherlandae. Males were 1.5 times more likely to be infected than females and were more severely infected. The presence of the parasite did not vary with relative weight or age, but infection severity was highest among older individuals that were in better condition. These results suggest that males are more susceptible to infection, and that infection is not associated with maturity or a gape-limiting food source. These results also suggest that heterosporosis increases in severity with time or by increased exposure. Our equilibrium yield model found that a 10% increase in mortality due to H. sutherlandae could result in 30% and 10% reductions in yield and mean catch weight, respectively. The results of this study direct future field sampling and laboratory experiments to further understand and predict the impacts of this parasite.
UR - http://www.scopus.com/inward/record.url?scp=85049023011&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85049023011&partnerID=8YFLogxK
U2 - 10.1371/journal.pone.0199580
DO - 10.1371/journal.pone.0199580
M3 - Article
C2 - 29940005
AN - SCOPUS:85049023011
VL - 13
JO - PLoS One
JF - PLoS One
SN - 1932-6203
IS - 6
M1 - e0199580
ER -