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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/29491

Title: Potential of three aquatic predators to control mosquitoes in the presence of alternative prey: a comparative experimental assessment
Authors: R. Kumar;P. Muhid;H.-U. Dahms;L.-C. Tseng;J.-S. Hwang
Contributors: NTOU:Institute of Marine Biology
國立臺灣海洋大學:海洋生物研究所
Keywords: biocontrol;foraging;preference;prey selection;vector control
Date: 2008
Issue Date: 2011-10-21T03:06:30Z
Publisher: Marine and Freshwater Research
Abstract: Abstract:Predator-induced control of pests depends on the predator’s preference for the target pest over naturally co-occurring prey species. We compared the larvivorous efficiency of three common freshwater predators: mosquitofish (Gambusia affinis; Baird and Girard, 1854), dragonfly naiads (Zyxomma petiolatum; Rambur, 1842) and copepods (Mesocyclops aspericornis; Daday, 1906) on different instars and the relative abundances of the mosquito Anopheles stephensi (Liston, 1901) in the presence of alternative cladoceran prey, either Moina macrocopa (Straus, 1820) or Daphnia similoides (Hudec, 1991). Larval removal rate decreased with increasing larval size and instar stage. The maximum consumption rate was by mosquitofish, followed by dragonfly naiads and copepods. The presence of either of the alternative prey significantly reduced larval consumption by all three predators, except in the D. similoides–mosquito larvae combination for naiads. Mosquitofish and copepods preferred early instars of the mosquito. Prey selectivity indices for early mosquito instars against D. similoides did not differ between mosquitofish and copepods, whereas naiads had significantly lower index values than the other two predators. Considering the negative impacts of mosquitofish on native assemblages, that is, its invasiveness and its lower selectivity for mosquito larvae, our results suggest that the feasibility of using copepods in large-scale control programs needs to be evaluated.
Relation: 59(4125), pp.817–835
URI: http://ntour.ntou.edu.tw/handle/987654321/29491
Appears in Collections:[海洋生物研究所] 期刊論文

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