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Mount Clemens, MI, United States

Muzzall P.M.,Michigan State University | Thomas M.V.,Lake St Clair Fisheries Research Station
Comparative Parasitology

A total of 1,270 cyprinids consisting of emerald shiners, Notropis atherinoides Rafinesque, 1818 spottail shiners, Notropis hudsonius (Clinton, 1824) mimic shiners, Notropis volucellus (Cope, 1865) and sand shiners, Notropis stramineus (Cope, 1865) (Cyprinidae) collected in 2009-2013 from Saginaw Bay and Port Sanilac, Lake Huron, and Lake St. Clair, Michigan, U.S.A., were examined for the nonnative Asian fish tapeworm, Bothriocephalus acheilognathi. The prevalences, mean intensities, and mean abundances of this cestode in the cyprinid species varied from 0 to 28%, 0.0 to 5.8, and 0.00 to 1.11, respectively. The infection values of B. acheilognathi were higher in Notropis spp. from Saginaw Bay than in Lake St. Clair. The proportions of infected and uninfected emerald shiners increased significantly from 2009 through 2011 and 2013 in Saginaw Bay. Emerald and mimic shiners are new host records for B. acheilognathi. Saginaw Bay and Port Sanilac, Lake Huron, and Lake St. Clair are new locality records for B. acheilognathi. The distribution of B. acheilognathi now extends north into Lake St. Clair and Lake Huron since its original detection in the Detroit River. Further, since Saginaw Bay and Lake St. Clair are important sources of wild-caught baitfish for the retail baitfish industry, this range extension of the Asian fish tapeworm raises fish management concerns for its spread into other waters of the state through bait bucket transfers. © 2016 The Helminthological Society of Washington. Source

Muzzall P.M.,Michigan State University | Thomas M.V.,Lake St Clair Fisheries Research Station
Comparative Parasitology

One-hundred trout-perch, Percopsis omiscomaycus, collected from Saginaw Bay, Lake Huron in September 2011, were examined for parasites. Seven parasite species (1 Myxozoa: Myxobolus procercum; 1 Ciliophora: Trichodina sp.; 3 Digenea: Allacanthochasmus sp., Neochasmus sp., Crepidostomum percopsisi; 1 Nematoda: Camallanus oxycephalus; 1 Copepoda: Ergasilus luciopercarum) were found to infect trout-perch. Crepidostomum percopsisi had the highest prevalence (98%), mean intensity (5.3), and mean abundance (5.2). Ergasilus luciopercarum had a prevalence of 46% and a mean intensity of 2.6. Myxobolus procercum and Allacanthochasmus sp.-Neochasmus sp. (considered 1 taxonomic group) each had a prevalence of 22%. Trichodina sp. and C. oxycephalus infrequently infected trout-perch. Gravid individuals of only C. percopsisi and E. luciopercarum were found. Trichodina sp., Allacanthochasmus sp., Neochasmus sp., C. oxycephalus, and E. luciopercarum are reported for the first time from trout-perch in Lake Huron. © 2015 The Helminthological Society of Washington. Source

Pothoven S.A.,National Oceanic and Atmospheric Administration | Hook T.O.,Purdue University | Nalepa T.F.,National Oceanic and Atmospheric Administration | Thomas M.V.,Lake St Clair Fisheries Research Station | Dyble J.,National Oceanic and Atmospheric Administration
Aquatic Ecology

We evaluated the response of the zooplankton community Saginaw Bay, Lake Huron to the disappearance of the planktivore alewife Alosa pseudoharengus using data collected in 1991-1996 (pre alewife decline) and 2009-2010 (post alewife decline). Bosmina longirostris, Diaptomidae, Cyclops, and Daphnia galeata contributed greatly to the separation of the two time periods with Diaptomidae and D. galeata increasing and Cyclops and B. longirostris decreasing, although B. longirostris remained the dominant species. Peak densities of zooplankton occurred in early summer (June) in the 1990s and in early fall (October) in 2009-2010. For the analysis of environmental variables on a bay-wide, annual basis, abundance of alewife, age-0 yellow perch Perca flavescens and Bythotrephes captured much of the variation in annual zooplankton community structure. Abundances of Bythotrephes and age-0 yellow perch were both higher in 2009-2010 than in 1991-1996. Some changes such as increasing proportions of calanoid copepods reflect a more oligotrophic community and are potentially indicative of resource-driven changes rather than direct or indirect impacts of the alewife disappearance. © 2012 Springer Science+Business Media Dordrecht (outside the USA). Source

Schulz C.A.,Michigan State University | Thomas M.V.,Lake St Clair Fisheries Research Station | Fitzgerald S.,Michigan State University | Faisal M.,Michigan State University
Comparative Parasitology

In order to identify leech species prevalent in Lake St. Clair, Michigan, U.S.A,. and understand their effect on fish hosts, fish were collected during May 2006 and 2007 from Anchor Bay, Lake St. Clair in the Laurentian Great Lakes Basin. Throughout the study, 2,117 fish from 21 species were examined for the presence of leeches. Overall, 1,064 leeches were collected from 165 individual fish and identified morphologically. Hosts included the channel catfish, freshwater drum, northern pike, northern shorthead redhorse sucker, quillback sucker, rock bass, smallmouth bass, walleye, and yellow perch. Leeches attached to hosts had a prevalence of 7.79%, with a mean intensity of 6.45 leeches/infected fish and an abundance of 0.50 leeches/examined fish. Collected leeches were identified as Actinobdella pediculata (Glossiphonidae), Placobdella montifera (Glossiphonidae), and Myzobdella lugubris (Piscicolidae), which was the most commonly occurring species. The freshwater drum had the highest prevalence, mean intensity, and abundance of leeches as a host for all leech species, as well as for A. pediculata and M. lugubris. Placobdella montifera was rare in occurrence, with little variation in host prevalence, mean intensity, or abundance. This is also the first record of the northern shorthead redhorse sucker as a host for A. pediculata. Leeches were found attached to various sites on the hosts, but occurred primarily on the pectoral fins. Gross inspection showed that leech attachment occurred in high intensities associated with necrotic areas and hemorrhages, and also caused swelling and prevented the opercular flap from closing. Histopathologically, leech attachment caused an extensive inflammatory response, necrosis of the muscle tissue, and edema. Results indicate that there are 3 predominant leech species parasitizing fish hosts in Lake St. Clair, that the leeches have preferred hosts and attachment locations, and that they cause damage to the underlying skin and musculature at the site of attachment. © 2011 The Helminthological Society of Washington. Source

Zorn T.G.,Marquette Fisheries Research Station | Wills T.C.,Lake St Clair Fisheries Research Station
North American Journal of Fisheries Management

Excess sand bedload can significantly degrade salmonid habitat and populations. Successful use of sediment traps to restore habitat and salmonid populations on two Michigan streams in the early 1980s led to application of traps at well over 100 coldwater streams in Michigan and rivers throughout the USA within a decade. Unfortunately, little quantitative evaluation has occurred other than anecdotal observations for some traps. We conducted a broad-scale survey of 65 Michigan stream reaches with sediment traps by collecting data along transects upstream and downstream of the traps to assess downstream changes in substrate composition, channel depth, and channel stability in response to sediment traps. We found that recent applications of sediment traps (usually as stand-alone instream habitat treatments) had no significant effect on substrate, thalweg depth, or bank stability conditions in the reaches studied. Using reach-based estimates of specific stream power at the 10% annual exceedence flow, we identified areas where sediment traps could potentially destabilize channels. Specific stream power estimates were positively correlated with the preponderance of gravel and coarser substrate in stream reaches. Our study and previous assessments of sediment traps suggest that managers carefully consider their river and all potential management options when deciding if sediment traps will provide the best return on their investment. © American Fisheries Society 2012. Source

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