Alewives (Alosa pseudoharengus; Figure 1) are small, silvery forage fish found along the East Coast from Newfoundland to the Carolinas. They are commonly referred to as river herring along with the closely related blueback...
Brook trout (Salvelinus fontinalis; Figure 1) are a species of char native to the eastern half of North America. Though commonly associated with headwater streams in the mountains, populations of brook trout have historically...
In many coldwater rivers and streams around the world, nonnative trout have altered the aquatic ecosystem. In the late 1800s, widespread trout stocking became commonplace and various trout species were introduced outside of their...
Studying aquatic organisms is challenging. Unlike counting sheep in a pasture, counting fish in the water is much more difficult. The most effective method varies considerably among species. Fisheries scientists have traditionally used nets,...
Sea lampreys (Petromyzon marinus) are a jawless species of fish native to the northern Atlantic Ocean and Mediterranean Sea. They have a complex life cycle that begins and ends in freshwater. Sea lamprey eggs...
Alewives (Alosa pseudoharengus) are small, silvery forage fish in the family Clupeidae (Figure 1). Their native range spans the eastern seaboard of North America from South Carolina to Newfoundland. Historically, alewives have supported important...
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...
Alewives (Alosa pseudoharengus) and blueback herring (Alosa aestivalis), collectively known as river herring, are small, silvery fish native to the east coast of North America. They are anadromous, meaning they spend most of their...
