J. Daniel McLaughlin

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The phylum Platyhelminthes is a diverse group of flatworms that includes parasites with serious impacts on human health, animal husbandry, aquaculture and wildlife management. Here we present degenerate primers for the barcode region of the mitochondrial cytochrome c oxidase I (COI) gene in flatworms. Although amplicons were obtained from a wide taxonomic(More)
Because the taxonomy of trematodes is based on adults, the larval stages of most digeneans cannot be identified to species based on morphology alone. Molecular data provide a means of linking larval stages to known adults. We obtained sequences from the barcode region of cytochrome oxidase I (CO1) from adult and larval parasites of fish, frogs, birds, and(More)
In this study, sequences from the barcode region of cytochrome c oxidase I (COI) were used to distinguish Diplostomum spp. in a sample of 497 metacercariae collected from diverse fishes of the St. Lawrence River, Canada and findings were corroborated with internal transcribed spacer (ITS) regions of rDNA. Twelve species were detected based on sequences and(More)
Larvae (metacercariae) in some species of Diplostomidae (Platyhelminthes: Digenea) inhabit fish eyes and are difficult to identify to species based on morphology. DNA barcoding has clarified the diversity and life cycles of diplostomids in North America, Europe and Africa, but has seldom been used in parasites sampled in large numbers or at large spatial(More)
Given that numerous amphibians are suffering population declines, it is becoming increasingly important to examine the relationship between disease and environmental disturbance. Indeed, while many studies relate anthropogenic activity to changes in the parasitism of snails and fishes, little is known of the impact on the parasites of amphibians,(More)
Agricultural contaminants can have devastating impacts on amphibian survival and development, particularly considering their sensitivity to environmental perturbation. However, it is commonly overlooked that amphibians are infected with various parasites that can influence the overall health of the animal when exposed to a stressful environment. We(More)
Abstract Instar-specific data on head length and body length of Hyalella azteca was obtained from live specimens reared individually at 23 ± 1 °C under a 14L:10D photoperiod and with food ad lib. Both head length and body length were strong predictors of instar number through instars 1 – 10. The relationship between instar number and head length was linear(More)
Parasite communities in freshwater fish vary annually and seasonally and can be influenced by the length, age, sex and phylogeny of hosts, and by associations among parasite species. We assessed the influence of these factors in species of Diplostomum in the eyes of 828 fish in 20 different species collected in a single lake in early summer or autumn over a(More)
The digestive tracts of 771 lesser snow geese (Chen caerulescens) collected from January to May 1983 from 12 locations (27 samples) were examined for helminth parasites to determine whether parasite species present in wintering geese or in spring migrants occurred independently of each other. Nine helminth species were identified. Seven had mean prevalences(More)
Flukes belonging to Sphaeridiotrema are important parasites of waterfowl, and 2 morphologically similar species Sphaeridiotrema globulus and Sphaeridiotrema pseudoglobulus, have been implicated in waterfowl mortality in North America. Cytochrome oxidase I (barcode region) and partial LSU-rDNA sequences from specimens of S. globulus and S. pseudoglobulus,(More)