The desert-dwelling sandfish (Scincus scincus) moves within dry sand, a material that displays solid and fluidlike behavior. High-speed x-ray imaging shows that below the surface, the lizard no longer uses limbs for propulsion but generates thrust to overcome drag by propagating an undulatory traveling wave down the body. Although viscous hydrodynamics can predict swimming speed in fluids such ...

Fish are often infected with different blood protozoa of the genera Babesiosoma, Trypanosoma, and Hemogrigarina. These parasites match which infect mammals. A total 120 samples from five fish species (Barbus grypus, Barbus sharpyi, Liza abu, Carasobarbus luteus, Aspius vorax) were collected Khazar River in Ninevah Governorate, Iraq at weekly intervals during period April 2022 to October for det...

To test the hypothesis that different species have similar responses to local and regional environmental constraints, we modelled the occurrences of 13 species using a data set of 413 undisturbed river reaches. Three environmental descriptors were considered at the local scale (river slope, river width, and upstream drainage area) and three at the regional scale (mean annual and mean range air ...

Abstract Migration patterns and habitat use of adult barbel ( Barbus barbus ) nase Chondrostoma nasus were monitored by radio telemetry over a period 13 months along 58-km-long section the Austrian part Danube River. The study site is confined upstream downstream two hydropower plants, contains larger tributary, Pielach Telemetry transmitters implanted into fish caught in this tributary after s...

An ecological risk assessment (ERA) was conducted for Shadegan Wetland in Iran. The objective of this study was to assess the risk to phytoplankton, zooplankton, invertebrate, insect larvae, and fish affected by pesticide in Shadegan Wetland. Five pesticides (DDT, Aldrine, Dieldrin, Ametryn and Lindane) were assessed to evaluate the impact to aquatic community in the Shadegan Wetland. The risk ...

 The concentrations of Cd, Pb, Ni and Hg were determined in gill, liver and muscle of Barbus xanthopterus in down streams of Karoon and Dez Rivers during summer 2009. Heavy metal concentrations varied significantly, depending on the types of the tissue in fish species. The levels of heavy metals such as Cd, Pb, Ni and Hg in the Barbus xanthopterus of Karoon River were higher than in B...

in this study the acute toxicity of organophosphorous pesticide in four native fishes of khouzestan province including: barbus sharpeyi, barbus grypus, barbus barbulus and barbus xanthopterus were investigated. the acute toxicity test was conducted following the organization for economic cooperation and development (oecd) under static-renewal test. each fish species exposed to serial dilution o...