perch

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perch,

common name for some members of the family Percidae, symmetrical freshwater fishes of N Europe, Asia, and North America. The perches belong to the large order Perciformes (spiny-finned fishes) and are related to the sunfishes and the sea basses. The best-known North American species is the yellow, or lake, perch (Perca flavescens), a popular game and food fish abundant in lakes and large streams, where it feeds on insects, crayfish, and small fish and grows to an average length of 1 ft (30 cm) and weight of 1 lb (.5 kg). The voracious walleye, or walleyed pike (Sander vitreus), another member of the family, is darker and larger (up to 10 lb/4.5 kg). Very similar to the walleye but slenderer and smaller is the sauger, or sand pike (S. canadensis). The native American darters (2–3 in/5–8 cm), found E of the Rockies, are widespread and of many species, most of them brilliantly colored. Of separate families are the pirate perch, a chubby little fish of sluggish streams and bayous (family Aphredoderidae), and the trout perch, a small fish abundant in the Great Lakes (family Percopsidae). See also surfperchsurfperch,
any member of the family Embiotocidae, a large family of spiny-finned, carnivorous fishes of the perch order. Also known as seaperches and surf fish, most surfperches are found off sandy shores of the North American Pacific Coast.
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. Perches are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Actinopterygii, order Perciformes, family Percidae.

Perch

 

(perch pole), a piece of circus equipment, a wooden or metal pole 2 to 10 m long. It is equipped with special devices at the top for the performance of acrobatic and gymnastic feats. The lower acrobat or gymnast balances the perch on his forehead, shoulder, hand, or waist, while the upper acrobat (acrobats) performs (perform) equilibristic, acrobatic, and other feats on the perch. The perch dates from the Middle Ages.

perch

[pərch]
(mechanics)
Also known as pole; rod.
A unit of length, equal to 5.5 yards, or 16.5 feet, or 5.0292 meters.
A unit of area, equal to 30.25 square yards, or 272.25 square feet, or 25.29285264 square meters.
(navigation)
A staff placed on top of a buoy, rock, or shoal as a mark for navigators; a ball or cage is sometimes placed at the top of the perch, as an identifying mark.
(vertebrate zoology)
Any member of the family Percidae.
The common name for a number of unrelated species of fish belonging to the Centrarchidae, Anabantoidei, and Percopsiformes.

perch

A unit of cubic measure used by stone masons; usually 16½ ft by 1½ ft by 1 ft (5.03 m by 0.46 m by 0.30 m).

perch

1
1. another name for rod
2. a solid measure for stone, usually taken as 198 inches by 18 inches by 12 inches
3. a pole joining the front and rear axles of a carriage
4. a frame on which cloth is placed for inspection
5. Obsolete or dialect a pole

perch

2
1. any freshwater spiny-finned teleost fish of the family Percidae, esp those of the genus Perca, such as P. fluviatilis of Europe and P. flavescens (yellow perch) of North America: valued as food and game fishes
2. any of various similar or related fishes