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Distribution and establishment of the alien Australian redclaw crayfish, Cherax quadricarinatus, in South Africa and Swaziland
It is demonstrated that C. quadricarinatus is established in South Africa and Swaziland and that the species has spread, not only within the river where it was first introduced, but also between rivers.
Using Tournament Angler Data to Rapidly Assess the Invasion Status of Alien Sport Fishes (Micropterus spp.) in Southern Africa
Angler catch data derived from competitive bass angling tournaments was used to document the distribution of 66 non-native populations of black bass in southern Africa and represent a novel approach to infer the status and distribution of invasive sport fish.
Diet of Largemouth Bass, Micropterus salmoides (Centrarchidae), an Invasive Alien in the Lower Reaches of an Eastern Cape River, South Africa
Comparisons with previous work on the lower Kowie River showed that when the river is flowing, young marine fish recruiting into the freshwater from the estuary become important prey items and data suggest that in theLower Kowies River bass utilize invertebrate prey at low fish prey abundance and opportunistically feed on migrant fish when these are available.
Life history and population dynamics of invasive common carp, Cyprinus carpio, within a large turbid African impoundment
Life history comparisons across the species’ global distribution showed large variations in growth and longevity, whereas early maturation (2–3 years) appeared to be a rather conservative trait, which suggests a rapid population growth potential associated with high resilience to management interventions once C. carpio has been introduced.
A critique of the balanced harvesting approach to fishing
It is concluded that evolutionary theory, population dynamics theory, ecosystem models with realistic assumptions and settings, and widespread empirical evidence do not support the BH proposal and will hinder the policy changes needed for the rebuilding of ecosystems, healthy fish populations, and sustainable fisheries.
Comparisons of isotopic niche widths of some invasive and indigenous fauna in a South African river
Overall, although the invasive T. granifera and P. disjunctivus were not in direct competition for dietary resources with native species in the Nseleni River system, their spread in isotopic space suggests they are likely to restrict energy available to higher consumers in the food web.
Distribution and establishment of the alien Australian redclaw crayfish, Cherax quadricarinatus , in the Zambezi Basin
Using a unified invasion framework to characterize Africa’s first loricariid catfish invasion
Using a unified framework for invasions this invasion was categorized as a self-sustaining population in the wild with individuals surviving and reproducing a significant distance from their original point of introduction.
Validation of Growth Zone Deposition in Otoliths of Two Large Endemic Cyprinids in Lake Gariep, South Africa
The number of growth zones distal to the OTC mark was consistent with findings from the edge analysis, providing evidence that growth zones in astericus otoliths of both species can be interpreted as annuli.
Who uses the fishery resources in South Africa's largest impoundment? Characterising subsistence and recreational fishing sectors on Lake Gariep
The African Union’s prioritisation of inland fisheries as an investment area for poverty alleviation and regional economic development will require the development of management plans. These should…