Adding carbon dioxide gas (CO2) to water, a process similar to making carbonated soda water, could help control the movement and behavior of invasive carp in the Great Lakes basin. Bighead Carp Hypophthalmichthys nobilis and Silver Carp H. molitrix are species of invasive Asian carp that threaten the Great Lakes. Scientists with the University of Illinois and U.S. Geological Survey (USGS) tested the effectiveness of infusing water with recycled CO2 gas to discourage the movement of Bighead and Silver Carp. Both carp species avoided CO2-infused water in a research pond at the USGS Upper Midwest…Read more
The American Fisheries Society (AFS) is the world’s oldest and largest organization dedicated to strengthening the fisheries profession, advancing fisheries science, and conserving fisheries resources.
Transactions of the American Fisheries Society
Pacific trout Oncorhynchus spp. in western North America are strongly valued in ecological, socioeconomic, and cultural views, and have been the subject of substantial research and conservation efforts. Despite this, the understanding of their evolutionary histories, overall diversity, and challenges to their conservation is incomplete. We review the state of knowledge on these important issues, focusing on Pacific trout in the genus Oncorhynchus. Although most research on salmonid fishes emphasizes Pacific salmon, we focus on Pacific trout because they share a common evolutionary history, and many taxa…Read more
This site is a companion for the AFS book Standard Methods for Sampling North American Freshwater Fishes. Increasingly biologists are adopting these methods so they will be able to compare their data to those collected by other organizations, in other regions, or across time. Read more information about standard sampling in general and how these techniques were developed; comment on specific techniques so those working on future editions can incorporate your ideas; compare your fish data to North American, ecoregion, state, and provincial averages and percentiles; and catch up on the latest research on the validation or “ground truthing” of specific standard methods.