Search Results - "Van Der Walt, Johannes A."

Rapid population decline in one of the last recruiting populations of the endangered Clanwilliam sandfish (Labeo seeberi): The roles of climate change and non‐native fish by Cerrilla, Cecilia, Afrika, Johannes, Impson, Dean, Jordaan, Martine S., Kotze, Nathan, Paxton, Bruce R., Reed, Cecile, Schumann, Mandy, Walt, Johannes A., Shelton, Jeremy M.

“…Freshwater fish are in decline worldwide as a result of introduced non‐native species, impoundment, water quality changes, over‐ion, and climate change. The…”
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Successful mechanical eradication of spotted bass (Micropterus punctulatus (Rafinesque, 1819)) from a South African river by Walt, Johannes A., Marr, Sean M., Wheeler, Marius J., Impson, N. Dean, Garrow, Craig, Weyl, Olaf L.F.

“…Following the discovery in 2007 of non‐native spotted bass (Micropterus punctulatus (Rafinesque, 1819)) in the Thee River, Olifants‐Doring River system,…”
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Spatial extent and consequences of black bass (Micropterus spp.) invasion in a Cape Floristic Region river basin by Van Der Walt, Johannes A., Weyl, Olaf L. F., Woodford, Darragh J., Radloff, Frans G. T.

“…Black bass (Micropterus spp.) are invasive fish that have adversely affected native fish communities in many regions of the world. They are known to threaten…”
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Vulnerability of Cape Fold Ecoregion freshwater fishes to climate change and other human impacts by Shelton, Jeremy M., Weyl, Olaf L.F., Chakona, Albert, Ellender, Bruce R., Esler, Karen J., Impson, N. Dean, Jordaan, Martine S., Marr, Sean M., Ngobela, Tumisho, Paxton, Bruce R., Van Der Walt, Johannes A., Dallas, Helen F.

“…Native freshwater fish populations throughout South Africa's Cape Fold Ecoregion (CFE) are in decline as a result of human impacts on aquatic habitats,…”
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Ecosystem responses to the eradication of common carp Cyprinus carpio using rotenone from a reservoir in South Africa by Dalu, Tatenda, Bellingan, Terence A., Gouws, Jeanne, Impson, N. Dean, Jordaan, Martine S., Khosa, Dumisani, Marr, Sean M., Mofu, Lubabalo, Schumann, Mandy, Slabbert, Etienne, Walt, Johannes A., Wasserman, Ryan J., Weyl, Olaf L. F.

“…The control of invasive alien fish populations using piscicides to alleviate impacts on native biota is a controversial conservation strategy because the…”
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Using a head‐start conservation intervention to boost spawning numbers of the endangered Clanwilliam sandfish by Cerrilla, Cecilia, Flemming, Leonard, Griffiths, Charles L., Impson, Dean, Jordaan, Martine S., Kajee, Mohammed, Paxton, Bruce R., Walt, Johannes A., Whitehead, Thomas Otto, Shelton, Jeremy M.

“…Freshwater ecosystems are the most threatened on Earth, with many species facing extinction. The Clanwilliam sandfish (Labeo seeberi) is South Africa's most…”
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Conservation implications of establishment success of the Critically Endangered Twee River redfin ‘Pseudobarbus’ erubescens (Skelton, ) in an artificial impoundment in South Africa by Jordaan, Martine S., Walt, Johannes A., Brink, Zanné, Erasmus, Sonja, Weyl, Olaf L. F.

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