Freshwater fish

Conservation implications of establishment success of Critically Endangered Twee River redfin in an artificial impoundment

This study reports the first known record of breeding of the Critically Endangered Twee River redfin ‘Pseudobarbus’ erubescens in an artificial impoundment.

Aquatic Conservation: Marine and Freshwater Ecosystems. Jordaan, M.S., Van der Walt, J.A., Brink, Z., Erasmus, S. and Weyl O.L.F. 2017.

    Down, but not out: Recent decline of Berg-Breede River whitefish (Barbus andrewi) in the upper Hex River South Africa

    The Berg–Breede River whitefish, Barbus andrewi, an endangered Cape Floristic Region endemic, was once widespread in both the Berg and Breede River catchments. However, its distribution has been strongly reduced, apparently by human-related activities, over the last century, and the Hex River now contains one of the last recruiting populations within its native range.

    Koedoe 59(1). Shelton, J., Impson, N.D., Graham, S. and Esler, K. 2017.

      Effect of an intensive mechanical removal effort on a population of non-native rainbow trout in a SA headwater stream.

      Invasions by non‐native species can compromise the conservation value of otherwise pristine headwater streams. While both developed and developing countries recognize this threat, few of the latter have suitable budgets to implement control programmes.

      Shelton, J., Weyl, O., Van der Walt, J., Marr, S., Impson D., Maciejewski K., Dallas, H., Tye, D. and Esler, K. 2017.

      Infographic: Freshwater fishing guide

      Fancy fishing? Find out where and how you can fish in the Western Cape.

      Reconstruction of the historical distribution ranges of imperilled stream fishes

      Aquatic Conservation: Marine and Freshwater Ecosystems 30:144–158. Chakona A, Gouws G, Kadye WT, Jordaan MS & Swartz ER. 2020.

      Record of Blue tilapia Oreochromis aureus in the Eerste River catchment Western Cape Province South Africa

      African J. Aquatic Sciences pp 187-193. Marr, S.M., Gouws, G., Avlijas, S., Khosa, D., Impson, D., vd Westhuizen, M. and Weyl, O. 2018

      Rethinking refuges: Implications of climate change for dam busting

      Biological Conservation 209: 188–195. Beatty, S., Allen, M., Lymbery, A., Jordaan, M.S., Morgan, D., Impson, D., Marr, C., Ebner, B. and Weyl, O.L.F. 2017.

      Successful mechanical eradication of spotted bass (Micropterus punctulatus) from a South African river

      Aquatic Conservation: Marine and Freshwater Ecosystems. Van der Walt, R., Marr, S., Wheeler, M., Impson, D., Garrow, C. and Weyl. O. 2018.

      Unexpected survival of sharptooth catfish during acute rotenone toxicity trials will complicate management of invasions.

      Biological Invasions. Jordaan, M.S., Dalu, T., Wasserman, R.J., Slabbert, E. and Weyl, O.L.F. 2017.

      Video World Environment Day: Ecosystem Restoration with Mbali

      Join Mbali as she interviews experts that are involved in ecosystem restoration. Available in English, Afrikaans, isiXhosa and isiZulu.

      Video: Webinar - Biodiversity State of Conservation Report 2020

      In this interesting webinar, learn about the state of conservation in the Western Cape, what the threats are to biodiversity and what is being done to conserve it.