Recent Submissions

  • A review of freshwater crayfish introductions in Africa 

    Madzivanzira, T.C.; South, J.; Wood, L.E.; Nunes, A.L.; Weyl, O.L.F. (2021)
    This review summarizes and analyses information on freshwater crayfish introductions in Africa. A total of 136 research papers and reports were found to be relevant. Forty-eight percent reported presence; 21% described ...
  • A global-scale screening of non-native aquatic organisms to identify potentially invasive species under current and future climate conditions 

    Vilizzi, L.; Copp, G.H.; Hill, J.E.; Adamovich, B.; Aislabie, L.; Akin, D.; Al-Faisal, A.J.; Almeida, D.; Azmai, M.N.A.; Bakiu, R.; Bellati, A.; Bernier, R.; Bies, J.M.; Bilge, G.; Branco, P.; Bui, T.D.; Canning-Clode, J.; Ramos, H.A.C.; Castellanos-Galindo, G.A.; Castro, N.; Chaichana, R.; Chainho, P.; Chan, J.; Cunico, A.M.; Curd, A.; Dangchana, P.; Dashinov, D.; Davison, P.I.; de Camargo, M.P.; Dodd, J.A.; Donahou, A.L.D.; Edsman, L.; Ekmekci, F.G.; Elphinstone-Davis, J.; Eros, T.; Evangelista, C.; Fenwick, G.; Ferincz, A.; Ferreira, T.; Feunteun, E.; Filiz, H.; Forneck, S.C.; Gajduchenko, H.S.; Monteiro, J.G.; Gestoso, I.; Giannetto, D.; Gilles, A.S.; Gizzi, F.; Glamuzina, B.; Glamuzina, L.; Goldsmit, J.; Gollasch, S.; Goulletquer, P.; Grabowska, J.; Harmer, R.; Haubrock, P.J.; He, D.K.; Hean, J.W.; Herczeg, G.; Howland, K.L.; Ilhan, A.; Interesova, E.; Jakubcinova, K.; Jelmert, A.; Johnsen, S.I.; Kakareko, T.; Kanongdate, K.; Killi, N.; Kim, J.E.; Kirankaya, S.G.; Knazovicka, D.; Kopecky, O.; Kostov, V.; Koutsikos, N.; Kozic, S.; Kuljanishvili, T.; Kumar, B.; Kumar, L.; Kurita, Y.; Kurtul, I.; Lazzaro, L.; Lee, L.; Lehtiniemi, M.; Leonardi, G.; Leuven, R.; Li, S.; Lipinskaya, T.; Liu, F.; Lloyd, L.; Lorenzoni, M.; Luna, S.A.; Lyons, T.J.; Magellan, K.; Malmstrom, M.; Marchini, A.; Marr, S.M.; Masson, G.; Masson, L.; McKenzie, C.H.; Memedemin, D.; Mendoza, R.; Minchin, D.; Miossec, L.; Moghaddas, S.D.; Moshobane, M.C.; Mumladze, L.; Naddafi, R.; Najafi-Majd, E.; Nastase, A.; Navodaru, I.; Neal, J.W.; Nienhuis, S.; Nimtim, M.; Nolan, E.T.; Occhipinti-Ambrogi, A.; Ojaveer, H.; Olenin, S.; Olsson, K.; Onikura, N.; O'Shaughnessy, K.; Paganelli, D.; Parretti, P.; Patoka, J.; Jr, R.; Pellitteri-Rosa, D.; Pelletier-Rousseau, M.; Peralta, E.M.; Perdikaris, C.; Pietraszewski, D.; Piria, M.; Pitois, S.; Pompei, L.; Poulet, N.; Preda, C.; Puntila-Dodd, R.; Qashqaei, A.T.; Radocaj, T.; Rahmani, H.; Raj, S.; Reeves, D.; Ristovska, M.; Rizevsky, V.; Robertson, D.R.; Robertson, P.; Ruykys, L.; Sab, A.; Santos, J.M.; Sari, H.M.; Segurado, P.; Semenchenko, V.; Senanan, W.; Simard, N.; Simonovic, P.; Skora, M.; Svolikova, K.S.; Smeti, E.; Smidova, T.; Spelic, I.; Srebaliene, G.; Stasolla, G.; Stebbing, P.; Stevove, B.; Suresh, V.R.; Szajbert, B.; Ta, K.A.T.; Tarkan, A.S.; Tempesti, J.; Therriault, T.W.; Tidbury, H.J.; Top-Karakus, N.; Tricarico, E.; Troca, D.A.; Tsiamis, K.; Tuckett, Q.M.; Tutman, P.; Uyan, U.; Uzunova, E.; Vardakas, L.; Velle, G.; Verreycken, H.; Vintsek, L.; Wei, H.; Weiperth, A.; Weyl, O.L.F.; Winter, E.R.; Wlodarczyk, R.; Wood, L.E.; Yang, R.B.; Yapici, S.; Yeo, S.S.B.; Yogurtcuoglu, B.; Yunnie, A.L.E.; Zhu, Y.J.; Zieba, G.; Zitnanova, K.; Clarke, S. (2021)
    The threat posed by invasive non-native species worldwide requires a global approach to identify which introduced species are likely to pose an elevated risk of impact to native species and ecosystems. To inform policy, ...
  • Ecosystem responses to the eradication of common carp Cyprinus carpio using rotenone from a reservoir in South Africa 

    Dalu, T.; Bellingan, T.A.; Gouws, J.; Impson, N.D.; Jordaan, M.S.; Khosa, D.; Marr, S.M.; Mofu, L.; Schumann, M.; Slabbert, E.; van der Walt, J.A.; Wasserman, R.J.; Weyl, O.L.F. (2020)
    1. The control of invasive alien fish populations using piscicides to alleviate impacts on native biota is a controversial conservation strategy because the collateral impacts on non‐target taxa are not well documented. ...
  • Influence of intra- and interspecific variation in predator-prey body size ratios on trophic interaction strengths 

    Cuthbert, R.N.; Wasserman, R.J.; Dalu, T.; Kaiser, H.; Weyl, O.L.F.; Dick, J.T.A.; Sentis, A.; McCoy, M.W.; Alexander, M.E. (2020)
    Predation is a pervasive force that structures food webs and directly influences ecosystem functioning. The relative body sizes of predators and prey may be an important determinant of interaction strengths. However, studies ...
  • Occupancy dynamics of rare cyprinids after invasive fish eradication 

    Castañeda, R.A.; Mandrak, N.E.; Barrow, S.; Weyl, O.L.F. (2020)
    The eradication of invasive species is a management strategy implemented to eliminate adverse impacts of invaders on native species communities. After eradications, follow-up studies are done to confirm eradication of the ...
  • Inter-specific differences in invader and native fish functional responses illustrate neutral effects on prey but superior invader competitive ability 

    Mofu, L.; South, J.; Wasserman, R.J.; Dalu, T.; Woodford, D.J.; Dick, J.T.A.; Weyl, O.L.F. (2019)
    Inter-specific interactions are key factors in the structuring and functioning of ecological communities. Therefore, it is necessary to assess species interactions, such as predator–prey dynamics and competitive exclusion, ...
  • A global review and meta-analysis of applications of the freshwater Fish Invasiveness Screening Kit 

    Vilizzi, L.; Copp, G.H.; Adamovich, B.; Almeida, D.; Chan, J.; Davison, P.I.; Dembski, S.; Ekmekci, F.G.; Ferincz, A.; Forneck, S.C.; Hill, J.E.; Kim, J.E.; Koutsikos, N.; Leuven, R.S.E.W.; Luna, S.A.; Magalhaes, F.; Marr, S.M.; Mendoza, R.; Mourao, C.F.; Neal, J.W.; Onikura, N.; Perdikaris, C.; Piria, M.; Poulet, N.; Puntila, R.; Range, I.L.; Simonovic, P.; Ribeiro, F.; Tarkan, A.S.; Troca, D.F.A.; Vardakas, L.; Verreycken, H.; Vintsek, L.; Weyl, O.L.F.; Yeo, D.C.J.; Zeng, Y.W. (2019)
    The freshwater Fish Invasiveness Screening Kit (FISK) has been applied in 35 risk assessment areas in 45 countries across the six inhabited continents (11 applications using FISK v1; 25 using FISK v2). The present study ...
  • An evaluation of the current extent and potential spread of Black Bass invasions in South Africa 

    Khosa, D.; Marr, S.M.; Wasserman, R.J.; Zengeya, T.A.; Weyl, O.L.F. (Springer, 2019)
    Black Bass, a collective name for members of the centrarchid genus Micropterus, are native to North America, but have been introduced globally to enhance recreational angling. This study assessed the distribution of ...
  • Sleeping with the enemy : introgressive hybridization in two invasive centrarchids 

    Diedericks, Genevieve; Henriques, Romina; von der Heyden, Sophie; Weyl, Olaf L. F.; Hui, Cang (John Wiley & Sons, IncFisheries Society of the British Isles, 2018)
    Introgressive hybridization between Micropterus dolomieu and Micropterus salmoides was assessed in their invaded South African range using nine microsatellite markers and two mtDNA gene regions. Although M. dolomieu and ...
  • Preliminary evaluation of non-native rainbow trout (Oncorhynchus mykiss) impact on the Cederberg ghost frog (Heleophryne depressa) in South Africa’s Cape Fold Ecoregion 

    Avidon, S.; Shelton, J.M.; Marr, S.M.; Bellingan, T.A.; Esler, K.J.; Weyl, O.L.F. (NISC (Pty) Ltd, 2018)
    We evaluated the impact of non-native rainbow trout Oncorhynchus mykiss on a population of endemic Cedarberg ghost frog Heleophryne depressa in the upper Krom River (Olifants-Doring River Catchment, Cape Fold Ecoregion). ...
  • Red swamp crayfish, Procambarus clarkia, found in South Africa 22 years after attempted eradication 

    Nunes, A.L.; Hoffman, A.C.; Zengeya, T.A.; Measey, G.J.; Weyl, O.L.F. (John Wiley & Sons, Ltd., 2017)
    1. No freshwater crayfish are indigenous to continental Africa, but four species have been introduced to the continent. One of these is the North American red swamp crayfish Procambarus clarkii, which has been introduced ...
  • Fictional responses from Vonesh et al. 

    Dick, J.T.A.; Alexander, M.E.; Ricciardi, A.; Laverty, C.; Downey, P.O.; Xu, M.; Jeschke, J.M.; Saul, W.-C.; Hill, M.P.; Wasserman, R.; Barrios-O'Neill, D.; Weyl, O.L.F.; Shaw, R.H. (Springer, 2017)
  • Why suggesting Australian redclaw crayfish Cherax quadricarinatus as biological control agents for snails is a bad idea 

    Weyl, O.L.F.; Nunes, A.L.; Ellender, B.R.; Weyl, P.S.R.; Chilala, A.C.; Jacobs, F.J.; Murray-Hudson, M.; Douthwaite, R.J. (NISC (Pty) Ltd, 2017)
  • Unexpected survival of sharptooth catfish Clarias gariepinus (Burchell 1822) during acute rotenone toxicity trials will complicate management of invasions 

    Jordaan, M.S.; Dalu, T.; Wasserman, R.J.; Slabbert, E.; Weyl, O.L.F. (Springer, 2017)
    The sharptooth catfish Clarias gariepinus is an emerging global invader for which control strategies might include the use of piscicides such as rotenone. Experimental exposure demonstrated that C. gariepinus was less ...
  • Functional responses can unify invasion ecology 

    Dick, J.T.A.; Alexander, M.E.; Ricciardi, A.; Laverty, C.; Downey, P.O.; Xu, M.; Jeschke, J.M.; Saul, W.C.; Hill, M.P.; Wasserman, R.; Barrios-O'Neill, D.; Weyl, O.L.F.; Shaw, R.H. (Springer, 2017)
    We contend that invasion ecology requires a universal, measurable trait of species and their interactions with resources that predicts key elements of invasibility and ecological impact; here, we advocate that functional ...
  • Using functional responses to assess predator hatching phenology implications for pioneering prey in arid temporary pools 

    Wasserman, R.J.; Alexander, M.; Barrios-O'Neill, D.; Weyl, O.L.F.; Dalu, T. (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 ...
  • Using functional responses to quantify interaction effects among predators 

    Wasserman, R.J.; Alexander, M.E.; Dalu, T.; Ellender, B.R.; Kaiser, H.; Weyl, O.L.F. (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, ...
  • Invasive crayfish threaten Okavango Delta 

    Nunes, A.L.; Douthwaite, R.J.; Tyser, B.; Measey, G.J.; Weyl, O.L.F. (The Ecological Society of America, 2016)
  • Emergent effects of structural complexity and temperature on predator-prey interactions. 

    Wasserman, R.J.; Alexander, M.E.; Weyl, O.L.F.; Barrios-O'Neill, D.; Froneman, P.W.; Dalu, T. (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 ...
  • Habitat simplification increases the impact of a freshwater invasive fish 

    Alexander, M.E.; Kaiser, H.; Weyl, O.L.F.; Dick, J.T.A. (Springer, 2015)
    Biodiversity continues to decline at a range of spatial scales and there is an urgent requirement to understand how multiple drivers interact in causing such declines. Further, we require methodologies that can facilitate ...

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