Knodus borki
Blue Perusalmler ( Knodus Borki )
The Blue Perusalmler ( Knodus Borki ), English Cochu 's Blue Tetra is a freshwater fish of the family of the Real tetras. The species is sold for years under the scientific name Boehlkea fredcochui, Gery 1960 aquaristic, but this was based on an erroneous determination. In 2008, the species was described as new.
Occurrence
It is a native to the eastern Peru swarm forming tetras, which reaches a length of about 5 cm. Its occurrence is the clay-colored and mineral-rich waters of the Rio Maranon White, from Ecuador to Peru Iquitos over to the vicinity of Leticia, Colombia.
Features
The Blue Perusalmler has a moderately elongated, laterally flattened body covered with cycloid scales and oliver color. The largest body height is in front of the pelvic fins and contained 2.7 to 3.3 times in body length. From the rear edge of the gill cover to the caudal fin base extends a broad longitudinal band, the light blue in the female, the male is purple and is outlined in black in the male sometimes. The tips of the dorsal fin and the tail fin are sometimes whitish. The maxilla is staffed with three to four tricuspid or conical teeth in Boehlkea fredcochui there are 11 to 21 teeth. The premaxilla has two to five dreispitzige teeth on the outer and four teeth on the inner row. The number of gill Reuse teeth is 15 to 18, the side line of the Blue Perusalmlers is incomplete. The caudal fin base is scaly.
- Dandruff formula 6-14 (SL ), 34-37 (MLR ), 5/1/4 (QR)
Way of life
The Blue Perusalmler reached about the age of 3 years with a maximum size of 5 cm. The pH is acidic to neutral values of 5.8 7.0 and a total hardness 5-12 ° GCH, and temperatures of 22 to 26 ° C. The females of the Blue Perusalmler look a bit plumper than the males.
Swell
- Axel Zarske, 2008: Knodus Borki sp. n - a new tetra from Peru with a complementary description of Boehlkea fredcohui Gery, 1966 ( Teleostei: Characiformes, Characidae ). Vertebrate Zoology 58 ( 2) :159 - 171st PDF