Perch fish
| Perch fish | ||||||||||||
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Percopsis omiscomaycus |
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| Systematics | ||||||||||||
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| Scientific name of the family | ||||||||||||
| Percopsidae | ||||||||||||
| Agassiz , 1850 | ||||||||||||
| Scientific name of the genus | ||||||||||||
| Percopsis | ||||||||||||
| Agassiz , 1849 |
The perch salmon (Percopsidae ( gr . Perke = perch, ops = similar)) are a family of small North American freshwater fish , consisting of just one recent genus ( Percopsis ) with two types exist. The fish resemble the gudgeon , but are not related to it.
features
Bass fish have both ridge and round scales . The head is scaly, the vomer toothless. The pelvic fins sit far down on the body. An adipose fin is present. The lateral line organ is complete or almost complete.
Fin formula : dorsal I – II / 9–12, anals I – II / 6–7, ventral 8.
species
- Percopsis omiscomaycus ( Walbaum , 1792) lives in North America in rivers thatdraininto the Arctic Ocean and the Atlantic Ocean . In the eastern United States, it occurs south to the Potomac River in Virginia . Also in the Yukon River in Alaska , the Great Lakes, and the Mississippi River basin ; 20 centimeters long.
- Percopsis trans montana ( Eigenmann & Eigenmann , 1892) lives endemic in the catchment area of the Columbia River in Idaho , Washington and Oregon ; 9.6 inches long.
Tribal history
Amphiplaga brachyptera from the Eocene
The perch fish with the extinct genera Amphiplaga , Erismatopterus , Lateopisculus and Massamorichthys have been identified as fossils from the Eocene 50 million years ago.
literature
- Joseph S. Nelson : Fishes of the world , Fourth Edition, Wiley & Sons, Hoboken 2006, ISBN 978-0-471-25031-9 .
Web links
Commons : Percopsidae - Collection of images, videos and audio files
- Bass salmon on Fishbase.org (English)