Now showing items 1-10 of 16
Using functional responses to quantify interaction effects among predators
(British Ecological Society, 2016)
1. Predator diversity alterations have been observed in most ecosystems as a result of the loss and/ or addition of species. This has implications for predator–prey dynamics as non-trophic interactions among predators, ...
Trophic interactions in an austral temperate ephemeral pond inferred using stable isotope analysis
Ephemeral ponds are vulnerable aquatic habitats which are difficult to protect given their dynamic nature and sensitivity to degradation during dry periods. Little information is available on these habitats in austral ...
Spatial extent and consequences of black bass (Micropterus spp.) invasions in a Cape Floristic Region river basin
(John Wiley & Sons Ltd, 2016)
1. 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 native fishes in the Cape Floristic Region of South Africa, ...
Using functional responses to assess predator hatching phenology implications for pioneering prey in arid temporary pools
(Oxford University Press, 2016)
The present study assessed the functional responses of two predatory ephemeral pond specialist copepods, Lovenula raynerae and Paradiaptomus lamellatus towards their natural prey Daphnia longispina. Lovenula raynerae ...
Invasive crayfish threaten Okavango Delta
(The Ecological Society of America, 2016)
Towards using thermal stress thresholds to predict salmonid invasion potential
The salmonids rainbow trout Oncorhynchus mykiss and brown trout Salmo trutta are amongst the world’s worst invaders with devastating impacts where introduced. Information on their invasive potential is key to predicting ...
Linking key environmental stressors with the delivery of provisioning ecosystem services in the freshwaters of southern Africa
(John Wiley & Sons Ltd, 2016)
Societies’ growing global footprint is causing a rapid increase in the demand for natural resources (i.e. ecosystem services), while also reducing the capacity of ecosystems to provide them. Freshwater ecosystems contribute ...
Reporting by-catch and mortalities in targeted biological field surveys on fishes
(John Wiley & Sons Ltd., 2016)
1. There is a paucity of information on the mortality of fishes and the capture and mortality of non-target by-catch organisms during scientific fish research surveys. 2. To investigate the extent of by-catch and reporting ...
Emergent effects of structural complexity and temperature on predator-prey interactions.
(Ecological Society of Americ, 2016)
Ephemeral aquatic environments are important habitats for a variety of species. They are highly variable with regards to vegetation structure and physico-chemical features that potentially mediate outcomes of biotic ...
A qualitative and quantitative analysis of historic commercial fisheries in the Free State Province in South Africa
(Creative Commons Attribution Licence, 2016)
There is a general lack of information on inland commercial fisheries in South Africa. The primary objective of this study was to provide a retrospective assessment of commercial fisheries in the Free State Province based ...