Epalzeorhynchos munense

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Epalzeorhynchos munense
Systematics
Order : Carp-like (Cypriniformes)
Subordination : Carp fish-like (Cyprinoidei)
Family : Carp fish (Cyprinidae)
Subfamily : Labeoninae
Genre : Epalzeorhynchos
Type : Epalzeorhynchos munense
Scientific name
Epalzeorhynchos munense
( Smith , 1934)

Epalzeorhynchos munense ( Syn. : Epalzeorhynchos munensis , Labeo munensis ) is a freshwater fish of the genus Epalzeorhynchos in the family of the carp fish (Cyprinidae) and originates from South-East Asia .

features

Epalzeorhynchos munense reaches a maximum standard length of 9.3 centimeters. The body is elongated and strongly flattened on the sides. The mouth and eyes are small. The rostral barbels are about as long as the diameter of the eye, the maxillary barbels are about half longer. Head and body are black, in his first description Smith mentions the general color of a specimen preserved about 8 years ago as reddish-brown, with creamy white underneath. The anal fin is black. Fishbase describes the dorsal fin as red and the pectoral and pelvic fins with a black border, but in another source the dorsal fin, the pelvic fins and the anal fin are given as almost black with a white or orange border. Smith describes the dorsal fin as blue-black with pale tips on the front fin rays , the anal fin as black with a pale front edge, the pelvic fins as pale at the base, black in the middle and with a white edge. According to Smith, the pectoral fins are transparent. The tail fin describes Smith as pure white, probably why no corresponding specimen of this species was more place since the first description. It appears that preserved specimens lose the red pigmentation of the caudal fin after three months, and the caudal fin turns white as a result. However, the holotype was collected by a forest officer eight years before Smith's description. The lively color of the caudal fin is probably a bright red.

The dorsal fin is supported by 11 to 12 split soft rays. On the front of the first gill arch are 26 to 30 gill spines . The sideline is almost straight, 36 scales sit along a lateral line.

distribution

Epalzeorhynchos munense is native to Southeast Asia. The distribution area extends over Thailand , Laos and Cambodia . It occurs in the river basin of the Mekong , the Mae Nam Chao Phraya and the Mae Nam Mae Klong .

Habitat and way of life

Epalzeorhynchos munense lives in medium water depths and at the bottom of rivers and streams. There the species can be found between rubble and rocks. During the flood season it penetrates into flooded forests and returns to the rivers when the water level drops. The diet of Epalzeorhynchos munense consists of phytoplankton and zooplankton .

use

Epalzeorhynchos munense is caught with purse seine , cast nets and gill nets . In Cambodia , along the Tonle Sap river is Epalzeorhynchos munense as an ingredient for the fish paste Prahok used. The species is rarely marketed as an ornamental fish . Fish farms that reproduce Epalzeorhynchos munense are not known, so only wild catches can be accepted.

Danger

The population of Epalzeorhynchos munense has declined by 30 percent in the last 10 years due to habitat degradation and increasing environmental pollution in the distribution area. The IUCN therefore classifies the species as endangered (VU Vulnerable).

Individual evidence

  1. ↑ a b c d e Hugh M. Smith: Contributions to the Ichthyology of Siam. In: Natural History Bulletin of the Siam Society , Vol. 9, No. 3, 1934. ( Online at www.siam-society.org )
  2. ↑ a b c d e f Epalzeorhynchos munense on Fishbase.org (English)
  3. ^ A b c Walter J. Rainboth: Fishes of the Cambodian Mekong (FAO Species Identification Field Guide for Fishery Purposes). 1997, Food & Agriculture Organization of the United Nations (FAO), ISBN 978-9251037430 , p. 120.
  4. ↑ a b c Epalzeorhynchos munense in the IUCN Red List of Threatened Species 2017-1. Posted by: A. Jenkins, FF Kullander, HH Tan, 2007. Retrieved June 16, 2017.

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