1. Individuals that live in groups benefit from increased foraging success and decreased predation. Protection from some types of parasites may provide an additional benefit of group-living. For fish, the extent to which shoaling can reduce an individual's risk of exposure to the infective stages of parasites is unknown. 2. We tested for antiparasite benefits of shoaling in fathead minnows expo...

Accurate estimates of population-level parameters of parasites, such as prevalence and mean intensity, require large sample sizes. The processing of such samples becomes an overwhelming task when parasites are abundant, as with trematode metacercariae in fishes. In the present study, a subsampling method reduced processing time while maintaining an accurate estimation of metacercariae prevalenc...

The intensity of infection of trematode metacercariae was determined in five species of cyprinoid fish collected from Mae Ngud reservoir, Chiang Mai Province. These species were Thynnichthys thynnoides, Puntioplites proctozysron, Hampala macrolepidota, Puntius leiacanthus and Puntius gonionotus. T. thynnoides contained the highest number (83.0%) of metacercariae, whereas P. gonionotus had the f...

Coastal ecosystems are threatened by growing pressures related to global change. The evaluation of an ecosystem’s biodiversity and status is consequence increasing importance assess potentially undergone changes predict their future trajectory for management conservancy purposes. Biotic indicators sensitive ecosystem thus continuously sought for. Trematode parasite communities were examined as ...

Seasonal fluctuations of host densities and environmental factors are common in many ecosystems and have consequences for biotic interactions, such as the transmission of parasites and pathogens. Here, we investigated seasonal patterns in all host stages associated with the complex life cycle of the intertidal trematode Maritrema novaezealandensis on a mudflat where this parasite’s prevalence i...

A total of 34 fishes, belonging to the yellow-finned sea bream Acanthopagrus latus were collected, in April 2008 from Khor Abdullah northwest Arabian Gulf, by using trawler net. Fishes surveyed for parasites. The study revealed presence two species parasites first one is a monogenetic trematode, Polylabris mamaevi and second digenetic Paradiscogaster farooqii. detection P. farooqii present repr...

Numerous echinostome trematodes are found in the intestines of birds and mammals throughout the world, and echinostomiasis in humans has been attributed to approximately 16 different species. In humans it is usually regarded as a rare intestinal parasite of little clinical importance except in heavy infections. Diagnosis of echinostomiasis is made by identification of eggs during fecal examinat...

Seven polymorphic loci containing dinucleotide repeats and one trinucleotide microsatellite were developed for the hemiurid fluke Lecithochirium fusiforme , a parasite of the European conger eel Conger conger . All parasites that were collected from a single individual host (a total of 54 specimens) were genotyped. The number of alleles ranged from two to eight. The observed and expected hetero...