A scanning electron microscopic study was performed on the surface ultrastructure of Pygidiopsis summa (Digenea: Heterophyidae) adults. Metacercariae were collected from gills and muscles of mullets (Mugil cephalus) caught in a known endemic area, and adult flukes were harvested from dogs after 8 weeks of experimental infection. The worm was calabash form with its posterior part broader than th...

Historically sharks have been seen either as a source of income through harvesting, or as a nuisance and danger. The economic value of sharks has traditionally been measured as the total value of sharks caught for liver oil, fins, or meat for consumption. Sharks have also been killed to near extinction in cases where they were seen as a threat to fisheries on other species. This is illustrated ...

Some parasites are known to bioaccumulate some environmental pollutants within their host. We hypothesized that these may be beneficial for hosts in polluted environments. experimentally increased long-term (five weeks) exposure polycyclic aromatic hydrocarbons (PAHs, three levels: 0.1X, 1X, 10X exposure) European chubs (Squalius cephalus) were naturally infected or uninfected with acanthocepha...

The Early Pleistocene site of Pietrafitta (central Italy) produced a rich vertebrate assemblage from the Late Villafranchian Land Mammal Age (late MN18). Geological and paleobotanical data indicate lacustrine environment, surrounded by humid deciduous broadleaved forest with temperate climate. consists at least 40 taxa including actinopterygians, amphibians, reptiles, birds, mammals. Here, we c...

Fish protection at hydropower plants is important for the sustainability of hosting ecosystems and acceptance hydropower. On their way downstream, fish are exposed to various related negative effects, ranging from a delay in downstream movement being injured or killed by turbine. Understanding behavior close proximity devices essential order establish efficient facilities. In this study, physic...

Habitat loss and degradation are causing collapses in freshwater fish the Mediterranean region, where habitat restoration actions still hampered by poor understanding of selection fitness. Here, we combined field surveys laboratorial experiments to investigate how water velocity, body size intra-specific interactions influence foraging success highly endangered Mira chub Squalius torgalensis. V...