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Fish use many traits to choose shoalmates. Generally they prefer larger shoals, shoalmates of their own species, shoalmates similar in size and appearance to themselves, healthy fish, and kin (when recognized). The oddity effect posits that any shoal member that stands out in appearance will be preferentially targeted by predators. This may ...
The common minnow is a small fish which reaches a maximum total length of 14 centimetres (5⁄ in), but is normally around 7 centimetres (3 in) in length. It has 3 spines and 6–8 soft rays in its dorsal fin with 3 spines and 6–8 soft rays in its anal fin. Its spine is made up of 38–40 vertebrae. It is distinguished from similar species ...
Description. Shoals are characteristically long and narrow (linear) ridges. They can develop where a stream, river, or ocean current promotes deposition of sediment and granular material, resulting in localized shallowing (shoaling) of the water. Marine shoals also develop either by the in-place drowning of barrier islands as the result of ...
75 ft (23 m) Max. depth. 210 ft (64 m) Surface elevation. 661 ft (201 m) at normal pool. Bull Shoals Lake is an artificial lake or reservoir in the Ozark Mountains of northern Arkansas and southern Missouri, United States. It has hundreds of miles of lake arms and coves, and common activities include boating, water sports, swimming, and fishing ...
Swarm behaviour. A flock of auklets exhibit swarm behaviour. Swarm behaviour, or swarming, is a collective behaviour exhibited by entities, particularly animals, of similar size which aggregate together, perhaps milling about the same spot or perhaps moving en masse or migrating in some direction. It is a highly interdisciplinary topic.
October 15, 1966. Designated NHL. July 19, 1964. The Sycamore Shoals of the Watauga River, usually shortened to Sycamore Shoals, is a rocky stretch of river rapids along the Watauga River in Elizabethton, Tennessee. Archeological excavations have found Native Americans lived near the shoals since prehistoric times, and Cherokees gathered there.
The Catawba River is a major river located in the Southeastern United States. It originates in Western North Carolina and flows into South Carolina, where it later becomes known as the Wateree River. The river is approximately 220 miles (350 km) long. It rises in the Appalachian Mountains and drains into the Piedmont, where it has been ...
Many archaeological sites have been discovered in the gorge that show that people have been dwelling in the canyon for at least 10,000 years. Prior to the completion of Hales Bar Dam in 1913 and the subsequent raising of the water level, the stretch of the Tennessee River flowing through the gorge was notorious for its navigational hazards, whirlpools, eddies, shoals, and one huge rock.