Invasive carps are ecologically and economically problematic fish species in many large river basins the United States pose a threat to aquatic ecosystems throughout much of North America. Four invasive carps: black carp (Mylopharyngodon piceus), grass (Ctenopharyngodon idella), silver (Hypophthalmichthys molitrix) bighead nobilis), particularly concerning for native because they occupy disrupt...

Between January and August 2002, a total of 74 fishes belonging to nine species (Alburnus caeruleus, Barbus luteus, B. sharpeyi, Carassius auratus, C. carassius, Ctenopharyngodon idella, Cyprinus carpio, Hypophathalmichthys molitrix Liza abu) were collected from three fish farms south Baghdad. Twenty-six parasites observed.They following : Three protozoa ( Ichthyophthirius multifiliis , Trichot...

Pathogenicity of Aeromonas hydrophila, previously isolated from kidney of apparently healthy silver carp, was tested in silver carp Hypophthalmichthys molitrix. Trials were also made to control the pathogen in the experimentally infected fish. Before artificial infection the morphological, biochemical and physiological characters of A. hydrophila were studied. The infection was done by intramus...

In the Mississippi River Basin of North America, invasive bigheaded carp (silver carp Hypophthalmichthys molitrix and bighead carp H. nobilis, also referred to as Asian carp) have spread rapidly over the past several decades. In the Illinois River, an important tributary of the Upper Mississippi River, reproduction appears to be sporadic and frequently unsuccessful, yet bigheaded carp densities...