Besides conspicuous changes in behaviour, manipulative parasites may also induce subtle physiological effects in the host that may also be favourable to the parasite. In particular, parasites may be able to influence the re-allocation of resources in their own favour. We studied the association between the presence of the acanthocephalan parasite, Pomphorhynchus laevis, and inter-individual var...

The reproductive period is a critical part of species’ life history. Estimating species-specific fecundity can improve demographic models aimed at developing recovery targets for imperilled species. We provide egg diameter and estimates develop length–fecundity relationship silver shiner, Notropis photogenis (Cope, 1865), small-bodied freshwater species listed as Threatened under Canada's Speci...

The study was aimed at following the movement of adolescent Tenualosa ilisha from nursery grounds to feeding and spawning or other type movements in Bangladesh waters. To accomplish this, data on metazoan endoparasites were used as biological tags for detection migratory route. A total 2667 host fishes collected eleven sites covering three different ecological habitats Bangladesh. Initial selec...

Examination of bald eagles (Haliaeetus leucocephalus) collected from several locations in North America contributed new information concerning the acanthocephalan fauna of this host. Representatives of Arythmorhynchus brevis, representing a new host record, were collected from eagles in Florida, New Hampshire, and Wisconsin. Plagiorhynchus sp. was collected from an eagle in Florida. Corynosoma ...

Fifty-eight individuals belonging to 10 species of bats, insectivores, and pikas were examined for helminths from 4 collection sites in Mongolia in 1999. Two species of bats (Vespertilio murinus and Eptesicus gobiensis) were infected with a single species of trematode (Plagiorchis vespertilionis), which represents a new record for the country. One individual of E. gobiensis also harbored 1 unid...

Competitive interactions between coinfecting parasites are expected to be strong when they affect transmission success. When transmission is enhanced by altering host behaviour, intraspecific conflict can lead to 'coinfection exclusion' by the first-in parasite or to a 'sabotage' of behavioural manipulation by the youngest noninfective parasite. We tested these hypotheses in the acanthocephalan...

As part of a continuing and more general study of the diversity of parasites from subterranean mammals in central North America, individuals of the Plains Pocket Gopher, Geomys bursarius bursarius, were collected from 7 localities in northwestern Minnesota from September 1991 through October 1996. Arthropods collected included the fleas, Opisocrostis bruneri (4 of 124, 3.2%), Foxella ignota ign...

Pomphorhynchus omarsegundoi sp. n. from Gymnotus carapo Linnaeus from the Paraná River basin in Argentina is described in this paper. The new species is characterised by having a small body; a non-spirally twisted long neck forming an inconspicuous asymmetrical bulb more developed dorsally than ventrally; a proboscis almost cylindrical, with 11 to 12 longitudinal rows of 5 to 7 (usually 6) hook...

This work aimed to study the temporal variation of metazoan parasites of Trichiurus lepturus from the coastal zone of Rio de Janeiro, Brazil. Between July 2006 and June 2007, there were four seasonal quarterly samples of 30 specimens of T. lepturus. In addition to a group composed of anisakid larvae, we collected a total of 14 species of metazoan parasites: five digenean; five monogenean, two c...

The poorly known Clymene dolphin ( Stenella clymene ) is a small oceanic cetacean distributed in tropical and subtropical waters of the Atlantic Ocean. In this study, we report, for first time, vagrant individual Argentina (Rada Tilly) that represents current southern-most record species. We provide molecular identification dolphin, based on partial sequences mitochondrial cytochrome b gene, ge...