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.
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
If they successfully invade Lake Erie, Asian carp could eventually account for about a third of the total weight of fish in the lake and could cause declines in most fish species — including prized sport and commercial fish such as walleye, according to a new computer modeling study. However, most of the expected declines in Lake Erie will not be as extreme as some experts have predicted, according to the food-web study by the University of Michigan’s Hongyan Zhang and colleagues from other American and Canadian research institutions. A few fish species, including smallmouth bass, would likely increase…Due to media interest, this article is now available free online.
It seems as though every winter ecology paper contains some variant of this sentiment — we know that winter is important, but we’re not crazy enough to study it. As researchers, we’ve built sampling regimes that ignore an entire season because winter is considered harsh and unforgiving. It’s cold, sharp, and sometimes deadly to us, and so we operate under the assumption that the same goes for the creatures we study. Alas, it is not so. There’s a lot going on under the snow, and even more going on under the ice…