Effect of bacterial quality and density on growth and whole body stoichiometry of Culex quinquefasciatus and Culex tarsalis (Diptera: Culicidae)

Journal of Medical Entomology
George W Peck, William E Walton

Abstract

Growth characteristics and whole body carbon (C), nitrogen (N), and phosphorus (P) concentrations were examined for the southern house mosquito, Culex quinquefasciatus Say, and Culex tarsalis Coquillett, reared on chemostat-grown bacteria, Pseudomonas aeruginosa. Whole body percentage of C, N, and P of Cx. quinquefasciatus larvae did not differ significantly across three bacterial concentrations (1, 5, and 10 mg of dry mass/liter) and two bacterial quality treatments (culture medium containing 5 microM P versus 50 microM P); whereas the P content of Cx. tarsalis larvae differed between the bacterial quality treatments. Low concentrations of high or low P bacteria decreased mass-specific growth rate (MGR), whereas intermediate and high bacterial concentrations affected MGR asymmetrically, depending on species. High concentrations of P-rich bacteria enhanced the growth rates of Cx. quinquefasciatus larvae relative to growth on the low P diets. Cx. tarsalis larvae reared on low P bacteria grew approximately 3- to 4 times faster than larvae reared on high P bacteria. The observed asymmetric response in MGR may have been because of differential tolerance in larvae to putative toxins present in P. aeruginosa and may provide one reaso...Continue Reading

References

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Citations

May 22, 2013·Parasites & Vectors·Guillaume MinardClaire Valiente Moro
Jul 25, 2015·BMC Microbiology·Dagne DugumaWilliam E Walton
Jun 19, 2012·Annals of the Entomological Society of America·Ebony G MurrellSteven A Juliano
Aug 16, 2018·Parasites & Vectors·Ephantus J MuturiChang-Hyun Kim
May 28, 2016·Journal of Vector Ecology : Journal of the Society for Vector Ecology·Donald A Beasley, William E Walton

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