Picture a beautiful flowing stream, teeming with life and sparkling in the sunlight. Now, imagine that in a matter of days it has all disappeared, evaporated into the air and carried off with the...
In many rivers throughout the world, dams have greatly altered the aquatic ecosystem. These structures block migratory routes for anadromous species that live in saltwater and migrate into freshwater to spawn, preventing them from...
Northeast of Italy’s stiletto heel, in the Southern Adriatic Sea, the continental shelf drops off into a submarine feature known as Bari Canyon (Figure 1). This undersea canyon is similar to one you might...
Dams have a variety of effects on a river. Changes in temperature, sediment transport, substrate composition, and discharge are just a few examples of how dams can impact fish habitat. When a dam is...
The round goby (Figure 1) is a relatively small fish species endemic to the Caspian and Black Seas. They have invaded North America and Western Europe, packing a nasty punch to native species. These...
How’d you like to spend Christmas on Christmas Island? To many of us during this time of year in the northern hemisphere, with our cold toes and grey skies, a warm tropical vacation is...
Oyster reefs are dense colonies made up of thousands of individual oysters attached to hard substrate (Figure 1). Because of their complex structures, oyster reefs provide important habitat for a variety of fish and...
Thousands of reservoirs have been constructed across the United States and Canada for water storage, flood control, generation of electricity, and recreation. Reservoirs are dammed rivers that have features (temperature, current, and habitat) that...
Calling all recreationists and outdoorspeople! It is the season of giving, so please consider ways to give back to your local fish habitat which provides drinking water, food, and recreational opportunities. While outdoors we...
Artificial reefs are intentionally placed man-made structures that are constructed to provide habitat for fish and invertebrates. They are made of dense, durable materials such as scuttled ships and barges, decommissioned military vehicles, rubble...
