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redfin

Redfin minnows (genus Pseudobarbus) are a unique and threatened group of freshwater fish found in the Cape Floristic Region (CFR) at the south-western tip of Africa. As the name implies, their fins glow bright red, particularly at breeding time, and males develop strange white conical growths on their noses (called tubercles) to help attract a mate. Incredibly, these fish also produce clicking sounds that echo through their silent watery worlds, presumably to warn other fish to keep clear of their territories. Redfin sound production - tandfonline.com/doi/pdf/10.2989/AJAS.2008.33.3.14.626 In the CFR alone, there are at least 14 species of redfin (all endemics), most of which face a serious threat of extinction in the near future. Predatory fish, have been introduced to most rivers in South Africa, and have eaten their way through nearly all of our indigenous fish populations in a mere 100 years. These introduced species now pose arguably the single greatest threat to our remaining, highly fragmented, native fish populations. Jeremy Shelton (based at the University of Cape Town) is passionate about conserving freshwater fish and ecosystems in South Africa. He recently completed his PhD focussing on the impact of rainbow trout on stream communities in the CFR and is now determined to increase awareness about the dire state of South Africa’s river systems. He believes that cleverly-directed, small-scale conservation efforts can go a long way towards improving the perilous state of the indigenous freshwater fishes of the CFR. “There is an urgent need to improve awareness and education about our freshwater fishes if we are to convince funders and managers that these fishes desperately need our help” says Jeremy. Indeed, a recent project conducted in a river flowing through the Cedarberg Mountains has demonstrated that realistic, achievable management interventions can be extremely effective in reeling our threatened fish species back from the edge of extinction. For more details - sajs.co.za/sites/default/files/publications/pdf/Impson_News%20and%20Views.pdf In just one lifetime our freshwater fishes have disappeared from nearly all of their natural habitat, and it is now time for us to stand up and speak out on behalf of these silent creatures of the stream. For more information about freshwater fish conservation initiatives in the Cape Floristic Region: Save Our Species - sospecies.org/sos_projects/fish/ewt_freshwater_fish/ Endangered Wildlife Trust - ewt.org.za/programmes/RRP/river.html Water Research Commission - wrc.org.za/Knowledge%20Hub%20Documents/Water%20Wheel/Articles/Archive/WW_03_sep-oct_CFK_fish_p_8-11.pdf Music: The Cave Singers - Swim Club Ffion Atkins, Jacenta Potts & Jembe Jem - Fireside Jam La Liberte - Asleep With the Stars La Liberte - Ghostlight M83 - Too Late