semi-anadromous fish

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• semi-anadromous — incomplete migration between fresh and salt water. The fish spawns and overwinters in fresh waters but feeds in large, brackish estuarine areas, the plumes of fresh water mixed with saline sea water that are rich in nutrients and important… …   Dictionary of ichthyology

• winter race — semi anadromous (q.v.) fish that move into rivers in autumn as overwintering there is less stressful and energy consuming for a freshwater fish. They often spawn earlier in spring and further upstream than non anadromous or sedentary stocks. See… …   Dictionary of ichthyology

• Fauna of Azerbaijan — or Animal Kingdom of Azerbaijan refers to the diversity of various types of animals, which inhabit and populate a defined ground or water area in Azerbaijan.The first reports on the richness and diversity of animal life in Azerbaijan can be found …   Wikipedia

• Wildlife of Azerbaijan — consists of its flora and fauna and their natural habitats.The symbol of Fauna in Azerbaijan is the Karabakh horse (Azeri: Qarabağ At) which is a mountain steppe racing and riding horse which can only be found in Azerbaijan. It is one of the… …   Wikipedia

• Merced River — Coordinates: 37°20′57″N 120°58′32″W / 37.34917°N 120.97556°W / 37.34917; 120.97556 …   Wikipedia

• Fisheries glossary — This is a glossary of terms used in fisheries, fisheries management and fisheries science. A * Abundance is a measure of how many fish are in a population or a fishing ground. See relative abundance and absolute abundance.* Acoustic survey a… …   Wikipedia

• Spawn (biology) — The spawn (eggs) of a clownfish. The black spots are the eyes developing. Spawn refers to the eggs and sperm released or deposited, usually into water, by aquatic animals. As a verb, spawn refers to the process of releasing the eggs and sperm,… …   Wikipedia

• American shad — Watercolor of an American shad by Sherman F. Denton, 1904. The swelling between the anal fin and ventral fin identifies this as a pregnant female. Scientific classification Kingdom …   Wikipedia

• Mattawoman Creek — is a 30.0 mile long (48.3 km)[1] coastal plain tributary to the tidal Potomac River with a mouth at Indian Head, Maryland, 20 miles (32 km) downstream of Washington, D.C. It comprises a 23 mile (37 km) river flowing through Prince… …   Wikipedia

• Chilkoot River — Chilkooot River from the Chilkoot Lake outlet Origin Takshanuk Mountains of Haines Borough, Alaska Mouth …   Wikipedia

• Concord River — The Concord River at the Old Bridge, Concord, Massachusetts, circa 1900. Origin Sudbury and Assabet Rivers, Conco …   Wikipedia