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Glossary

     A-D      E-H     I-N      O-R      S-Z

A

Acoustic Telemetry Tags - tags used for tracking; it sends out a “ping” which is picked up and recorded by an acoustic receiver
Anadromous - fish that live in the salt water oceans and migrate to fresh water rivers and streams to spawn
Anal Fin - fin located on the underside of a fish just behind the anus which is used for stabilization
Atlantic Ocean - the second largest ocean; located between the East Coast of North and South America and the West coast of Europe and Africa; covers approximately one-fifth of the Earth’s surface

B


Barbel - whisker-like sensors found between the snout and mouth on sturgeon which are used to find prey
Bay - an area of water bordered by land on three sides; generally have calmer waters than the adjacent sea due to the protection of the surrounding land
Bottom Feeder - a fish that feeds on the bottom of the water column
Brackish Water - water that is more salty than fresh water, but not as salty as seawater; results from mixing of seawater with fresh water, as in estuaries
Buoyancy - the upward force that fluid exerts on things that are less dense than the water; upward force that keeps items afloat
By-catch - accidental catch of a non-target species while fishing for another species

C


Caviar - the processed roe or eggs of sturgeon
Caudal Fin - the tail fin; propels fish through the water by moving back and forth or side to side
Coastal - area where the land meets the sea or ocean; the seashore
Crustacean - a large group of arthropods, with almost 52,000 described species; includes various familiar marine animals, such as crabs, lobsters, crayfish, shrimp, krill and barnacles

D


Dam - a barrier constructed across a waterway to control the flow of water, usually for redirection of water in order to harness power of the water flow
Diadromous - referring to fish that make migrations between salty sea water and fresh river water
Dorsal Fin - the fin located on the back of the fish used for stabilization
Dredging - a method for deepening streams, lakes, or reservoirs by scraping and removing solids from the bottom