I went fly fishing for Clanwilliam Yellowfish and found this school of Clanwilliam redfin. More on this endangered species below.
The Clanwilliam redfin (Pseudobarbus calidus), is a ray-finned fish species in the family Cyprinidae.
This species is considered Vulnerable by the IUCN, mainly due to the adverse impact of the introduced smallmouth bass (Micropterus dolomieu) on its population. The most drastic declines have been in the past, and though the species is still declining it is not doing so at an alarming rate; wherever the bass has not become established yet it is actually rather plentiful. Bluegills (Lepomis macrochirus) and rainbow trout (Oncorhynchus mykiss) are other introduced species that are significant as predators of younger Clanwilliam redfins. Banded Tilapia (Tilapia sparrmanii) is yet another introduced fish that has an adverse effect on the stocks of B. calidus, in its case due to competition for food. The other main threat is water pollution and other forms of unsustainable water use. Particularly the conversion of riparian lands for citrus plantations, with the resultant uninhibited runoff of pesticides and fertilizers, is considered very harmful.
The Clanwilliam redfin occurs in the Cederberg Wilderness Area and the Matjies River Nature Reserve, where it is at least safe from habitat destruction. It is listed as Endangered by the Nature Conservation Ordinance of Western Cape Province. For the time being, it may not be killed or caught.
Adventures by A Himitsu / a-himitsu Creative Commons - Attribution 3.0 Unported- CC BY 3.0 creativecommons.org/licenses/b... Music released by Argofox • A Himitsu - Adventures... Music provided by Audio Library • Adventures - A Himitsu...
18 мар 2018
