FOSAF NEWS - Final list of rivers for alien fish control in the Western Cape

The table below is the final list of 18 rivers which are being considered for alien fish control, two of which contain rainbow trout. 

The previous lists of “96 rivers” and “41 rivers” are no longer under consideration. It is important to note that with the exception of the Krom in the Olifants/Doring system it is unlikely that control work will commence on any of the rivers within the next 12 months. The first option in the Krom  is to remove alien fishes by mechanical means rather than the use of a piscicide.

FOSAF_1076.jpg

Doring River redfin (photo by Riaan van der Walt)

In order to clear a single river of alien fishes requires considerable funding, manpower and time (up to 2 years) so it is unlikely that the entire project (all 18 rivers) will be completed within the next twenty years. CapeNature is also aware of the concerns of trout anglers regarding the other Krom River which is a tributary of the Smalblaar/Molenaars in the Breede River system. Further fish surveys and a detailed project plan are still required for this stream before any trout control operations are contemplated. Prior to trout control operations there will be comprehensive negotiations with key stakeholders including FOSAF and the Cape Piscatorial Society. It should be noted that most of the rivers in the table are small streams with little interest to flyfishers as they are invaded by one or more bass species which rarely reach reasonable angling size.

14 of these rivers were discussed at a workshop at Jonkershoek in May this year and Minutes of the meeting plus the presentation may be accessed on the FOSAF website at http://www.fosaf.co.za/ywgDocuments.php

Also refer to the excellent book on the indigenous fishes of the Western Cape, 'Swimming on the Edge of Extinction' by Craig Garrow & Sean Marr.
Contact jenny@blueweaver.co.za or 021-7014477 for a copy.

 River

River system

Endangered fish species

Alien fish present

comments

  1. Krom

Olifants-Doring

Doring fiery redfin

Clanwilliam sawfin

RT, LMB, BG

EIA river

  1. Kromme

Kromme

Kromme redfin

LMB

EIA river, only one in Eastern Cape

  1. Suurvlei

Olifants-Doring

Twee River redfin

CK, CWYF

EIA river

  1. Rondegat

Olifants-Doring

Fiery redfin

SMB

EIA river, recently cleared of bass

  1. Biedouw

Olifants-Doring

Clanwilliam sawfin

Clanwilliam sandfish

SMB, SB

1 of 14 rivers discussed at workshop

  1. Jan Dissels

Olifants-Doring

Clanwilliam sawfin

Fiery redfin

SMB, BG

~

  1. Hex

Olifants-Doring

Clanwilliam sawfin

SMB

~

  1. Breekrans

Olifants-Doring

Clanwilliam sawfin, Doring fiery redfin

SMB

~

  1. Twee

Olifants-Doring

Twee River redfin

CK, CWYF, BG

~

  1. Middeldeur

Olifants-Doring

Twee River redfin

CK, CWYF, BG

~

  1. Krom Antonies

Verlorenvlei

Verlorenvlei redfin

LMB, BT

~

  1. Krom

Breede

Giant redfin

RT

~

  1. Upper Riviersonderend

Breede

Giant redfin

 

~

  1. Kars

Heuningness

Heuningness redfin

LMB, BG

~

  1. Poort

Heuningness

Hueningness redfin

LMB, BG

~

  1. Tradouw

Breede

Barrydale redfin

LMB, BT

~

  1. Huis

Breede

Barrydale redfin

LMB, BT

~

  1. Upper Driehoeks

Olifants-Doring

Doring fiery redfin

LMB

~

BT = banded tilapia, BG= Bluegill sunfish, CK = Cape kurper, CWYF = Clanwilliam yellowfish, LMB = Largemouth bass, SMB = smallmouth bass, SB = spotted bass and RT = rainbow trout.

FOSAF_1077.jpg

Jan Dissels River, Cederberg (photo by Riaan van der Walt)

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