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German wasp | Vespula germanica

German wasp

Vespula germanica

Coral bush | Ardisia crenata

Coral bush

Ardisia crenata

Purple loosestrife | Lythrum salicaria

Purple loosestrife

Lythrum salicaria

Pom pom weed | Campuloclinium macrocephalum

Pom pom weed

Campuloclinium macrocephalum

Canarybird bush | Crotalaria agatiflora

Canarybird bush

Crotalaria agatiflora

Peanut butter cassia | Senna didymobotrya

Peanut butter cassia

Senna didymobotrya

Rubber vine | Cryptostegia grandiflora

Rubber vine

Cryptostegia grandiflora

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Environmental Programmes

In order to tackle our country’s socio-economic challenges, the government adopted the Outcomes based approach to improve government performance and providing focus on service delivery. find out more

Alien fishes: Do we know enough for effective management?

Alien fishes: Do we know enough for effective management?
Olaf L.F. Weyl1, Bruce R Ellender1, Ryan J Wasserman1, Sean Marr1, Philip Ivey4, Darragh J. Woodford2, Mhairi E. Alexander3, Tsungai A. Zengeya4, Martine Jordaan5, N Dean Impson5
1Center for Invasion Biology, South African Institute for Aquatic Biodiversity
2Center for Invasion Biology, University of the Witwatersrand
3University of the West of Scotland
4South African National Biodiversity Institute, Pretoria National Botanical Gardens
5CapeNature

Fifty-five fish species have been introduced into novel environments in South Africa. While pathways for initial introductions are fairly well understood, there is a paucity of information on subsequent spread, establishment and impact for many of these species. Effective management of these invasions requires not only current knowledge of invasion status and invasion risk so that species or ecosystems can be prioritised for intervention. This paper will provide: (1) a review of drivers, pathways and the invasion status of introduced fishes; (2) a summary of impacts and utility 

(e.g., potential for management conflicts) and (3) a measure of invasiveness derived from an adaptation of the Freshwater Fish Invasiveness Scoring Kit (FISK) to South African conditions. These data are then used to prioritise species for management intervention. The contribution of this paper to the National Status Report on invasive species is evaluation of management priorities based on an up to date synopsis of the current status and risk of spread for alien and extralimital fishes in South Africa.

Read 3004 times Last modified on Tuesday, 03 May 2016 12:14

General News Updates

2019 National Symposium on Biological Invasio…

26-02-2019

This is your invitation to South Africa's 2019 National Symposium on Biological Invasions. The convention is hosted by the Centre for Invasion Biology (CIB), University of Stellenbosch, and the Biolo... Read more

2019 Invasive Species Training

22-01-2019

During the past five years (2014-2018), ISSA invasive species trainers have trained 4 000 in the identification of invasive species and laws pertaining to invasive species across South Africa.  ... Read more

Alien Grass Working Group

04-09-2018

Who are we? The South African National Alien Grass Working Group was jointly initiated by the South African Biodiversity Institute (SANBI) and the Centre for Excellence in Invasion Biology (C·I·B) in... Read more

Permits for planting indigenous Cynodon?

01-03-2018

On 16 February, 2018, South Africa's Department of Environmental Affairs issued amendments to the regulations and lists relating to the National List of Invasive Species.  Updates to the draft&n... Read more

Invasive species training 2018 dates released

28-02-2018

Interested in invasive species?  How much do you know about NEMBA invasive species compliance for landowners and organs of state? The South African Green Industries Council (SAGIC) have released... Read more

Communications post for Africa advertised

25-01-2018

The Nature Conservancy has advertised a brand new post:  Communications Manager, Africa Region. Knowledge of invasive species and water would be an asset in this post. See details below:    Job Titl... Read more