Three species of invasive carp—Grass Carp Ctenopharyngodon idella, Silver Hypophthalmichthys molitrix, and Bighead H. nobilis—are rapidly spreading throughout North America. Monitoring their reproduction can help to determine establishment in new areas but is difficult due challenges associated with identifying fish eggs. Recently, random forest models provided accurate identification eggs base...

Recently, commercial nanometer sized silver is extensively used for its antibacterial effect; however, nanoparticles may also have ecotoxicological effects after being discharged into aquatic ecosystems. Nanometer sized silver can flow into water ecosystems, where it can exert a variety of physiologically effects in aquatic animals, including fish. The current research aimed to examine the effe...

Myxozoans are an economically important group of microscopic parasites best known for the diseases they cause in commercially important fish hosts. The classification of myxosporeans is generally based on the morphology of their myxospores. Without molecular data, it is very difficult to identify new or existing species. DNA sequence information is therefore, a prerequisite to taxonomic and phy...

First posted June 15, 2021 For additional information, contact: Director, Northern Prairie Wildlife Research CenterU.S. Geological Survey8711 37th Street SoutheastJamestown, ND 58401Contact Pubs Warehouse Controlling range expansion of invasive carp (specifically Hypophthalmichthys spp.) on the Tennessee River is important to conserve ecological and economic benefits provided by river. We colla...