Perch

Information about Perch

Perch

Yellow perch (Perca flavescens)

Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Perciformes
Family:	Percidae
Genus:	*Perca* Linnaeus, 1758

Species

P. flavescens (Yellow perch)
P. fluviatilis (European perch)
P. schrenkii (Balkhash perch)

For other meanings of the word perch, including fish not in the Perca genus, see .

Perca is the genus of fish referred to as perch or yellow perch, a group of freshwater fish belonging to the family Percidae. Perch, of which there are three species in different geographical areas, lend their name to the largest order of vertebrates: the Perciformes, from the Greek perke meaning perch, and the Latin forma meaning shape. Many other species of fish are also called "perch." Also there is the lateral line system.

Perch have "rough" or ctenoid scales. When looking through a microscope, the scale look like a plate with growth rings and 89 spikes on the top edges. Externally the anatomy of perch is simple enough. On the dorsal side of the fish, there consists a upper maxilla and lower mandible for the mouth, a pair of nostrils, and two lidless eyes. On the posterior sides are the operculum, which are used to protect the gills. Also there is the lateral line system which is sensitive to vibrations in the water. They have a pair of pectoral and pelvic fins. On the anterior end of the fish, there are two dorsal fins. The first one is spiny and the second is soft. There is also an anal fin, which is also considered spiny, and a caudal fin. Also there is a cloacal opening right behind the anal fin. All perciform fish share the perch's general morphology.

The type species for this genus is the European perch.

Species

Most authorities recognize three species of perch:

The European perch (Perca fluviatilis) is found in Europe and Asia. It is usually dark green with red fins. The European perch has been successfully introduced in New Zealand and Australia where it is known as the redfin perch or English perch.
The Balkhash perch (Perca schrenkii) is found in Kazakhstan, (in Lake Balkhash and Lake Alakol), Uzbekistan, and China. It is very similar to the European perch, and grows to a comparable size.
The Yellow perch (Perca flavescens), smaller and paler than the European perch, is found in the United States and Canada.

For other perch not in the Perca genus, see Perch (disambiguation)

References

Gilberson, Lance, Zooslogy Lab Manual 4th edition. Primis Custom Publishing. 1999.

P. flavescens

Binomial name
Perca flavescens
Mitchill, 1814

The yellow perch (Perca flavescens
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Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. Scientific classification also can be called scientific taxonomy, but should be distinguished from folk taxonomy, which lacks scientific basis.
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Chordata
Bateson, 1885

Typical Classes

See below

Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates.
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Actinopterygii
Klein, 1885

Subclasses

Chondrostei
Neopterygii
See text for orders.
The Actinopterygii (the plural form of Actinopterygius) comprise the class of the ray-finned fishes.
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Perciformes

Families

many, see text
The Perciformes, also called the Percomorphi or Acanthopteri, include about 40% of all fish and are the largest order of vertebrates. The name Perciformes means perch-like.
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Percidae

Genera

Ammocrypta
Crystallaria
Etheostoma
Gymnocephalus
Perca
Percarina
Percina
Romanichthys
Sander
Zingel
See text for species.
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Carolus Linnaeus (Carl von Linné)

Carl von Linné, Alexander Roslin, 1775. Currently owned by and hanging at the Royal Swedish Academy of Sciences.
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P. flavescens

Binomial name
Perca flavescens
Mitchill, 1814

The yellow perch (Perca flavescens
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P. fluviatilis

Binomial name
Perca fluviatilis
Linnaeus, 1758

The European perch (Perca fluviatilis) is a highly predatory species of perch found in Europe and Asia.
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P. schrenkii

Binomial name
Perca schrenkii
Kessler, 1874

The Balkhash perch (Perca schrenkii
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Vertebrata
Cuvier, 1812

Classes and Clades

See below
Vertebrates are members of the subphylum Vertebrata (within the phylum Chordata), specifically, those chordates with backbones or spinal columns.
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Greek}}}
Writing system: Greek alphabet
Official status
Official language of: Greece
Cyprus
European Union
recognised as minority language in parts of:
European Union
Italy
Turkey
Regulated by:
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Latin}}}
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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Ctenoid means 'having the margin toothed like a comb'. It is used to the scales of some fishes, such as perciforms that have such a toothed margin. Ctenoid scales are essentially cycloid scales with teeth at their posterior edges.
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Eyes are organs of vision that detect light. Different kinds of light-sensitive organs are found in a variety of organisms. The simplest eyes do nothing but detect whether the surroundings are light or dark, while more complex eyes can distinguish shapes and colors.
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A gill is a respiration organ that functions for the extraction of oxygen from water and the excretion of carbon dioxide. Unlike many small aquatic animals, which can absorb oxygen through the entire surface of their bodies, more complex aquatic organisms have gills specially
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A type species fixes the name of a genus (or of a taxon in a rank lower than genus).

Strictly speaking, a type species exists only in zoological nomenclature. As set in article 42.
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Europe is one of the seven traditional continents of the Earth. Physically and geologically, Europe is the westernmost peninsula of Eurasia, west of Asia. Europe is bounded to the north by the Arctic Ocean, to the west by the Atlantic Ocean, to the south by the Mediterranean Sea,
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Asia is the world's largest and most populous continent. It covers 8.6% of the Earth's total surface area (or 29.4% of its land area) and, with almost 4 billion people, it contains more than 60% of the world's current human population.
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Anthem
"God Defend New Zealand"
"God Save the Queen"¹

Capital Wellington

Largest city Auckland
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Anthem
Advance Australia Fair ^[1]

Capital Canberra

Largest city Sydney
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P. schrenkii

Binomial name
Perca schrenkii
Kessler, 1874

The Balkhash perch (Perca schrenkii
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Anthem
My Kazakhstan

Capital Astana

Largest city Almaty
Official languages Kazakh (state language), Russian
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Perch

Information about Perch

Species

References