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.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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).
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
We in turn would then look to northern Minnesota lakes if we wanted to come home with enough perch filets to satisfy a hungry Friday night crowd.
Perch said: "It was a shock because we weren't even doing that bad, it just looked like the writing was on the wall from the start with Mike Ashley or whoever not being happy Chris was there and it was inevitable he was going to go.
Perch suffered the highs and lows at United - first struggling to wins fans over, the sacking ofChris Hughton,Pardew's debut season and a relegation battle the year after.
The fan's frustrations towards Ashley were there when Perch finally left for Wigan in July 2013 and the 33-year-old admits he is surprised the Sports Direct Owner remains in charge.
I liked chatting about their study, but the more we talked the more I wanted to see a perch for myself.
Victoria Basin Commission told the Nation that with the population of riparian communities growing, multiple activities have increasingly come into conflict with the environment."In the last three to four decades, there used to be over 500 species in the lake but over time with the fisheries dynamics including introduction of the Nile Perch and growing culture for fish eating has affected this.
Black perch have an unrestricted lobular testis type (Uribe et al.
Deck has big ideas for what to do with Perch & Play.
There was a clear difference in perch diet between spring and summer (Table 1), with summer diet comprised almost entirely of fish and spring diet dominated by macrophytes (Alopecurus sp.) and fish eggs.
Numerous supplemental perch designs have been installed on power poles in the northwest and throughout the US, but to our knowledge no studies reporting if or how raptors use such perches, or how supplemental perches might be improved, are currently available.
Fort Perch Rock curator Doug Darroch said: "We tend to fire the cannon on major occasions, like when the great ships come in or on Remembrance Sunday.
Perch does not currently allow you to set up any promotions or social posts from within the app.