Effects of cohabitation on the population performance and survivorship of the invasive mosquito Aedes albopictus and the resident mosquito Aedes notoscriptus (Diptera: Culicidae) in Australia

Nicholson, J., Ritchie, S.A., Russell, R.C., Webb, C.E., Cook, A., Zalucki, M.P., Williams, C.R., Ward, P., and van den Hurk, A.F. (2015) Effects of cohabitation on the population performance and survivorship of the invasive mosquito Aedes albopictus and the resident mosquito Aedes notoscriptus (Diptera: Culicidae) in Australia. Journal of Medical Entomology, 52 (3). pp. 375-385.

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Abstract

The presence of Aedes albopictus (Skuse) in the Torres Strait of northern Australia increases the potential for colonization and establishment on the mainland. However, there is a possibility that native species that occupy the same habitats may influence the population performance of Ae. albopictus, potentially affecting the establishment of this species in Australia. Cohabitation experiments were performed with the endemic Aedes notoscriptus (Skuse), which has been found occupying the same larval habitats as Ae. albopictus in the Torres Strait and is the most widespread container-inhabiting Aedes species in Australia. The influence of environmental factors and cohabitation between the two species was examined using different climates, food resource levels, food resource types, and species densities. Survivorship proportions and a population performance index (λ’) were calculated and compared. The consequences of increased Ae. notoscriptus densities were reduced survivorship and λ’ for Ae. albopictus. Despite this, the mean λ’ of Ae. albopictus and Ae. notoscriptus was consistently ≥ 1.06, indicating both species could increase under all conditions, potentially due to increasing conspecific densities negatively affecting Ae. notoscriptus. The outcomes from this study suggest that the preexisting presence of Ae. notoscriptus may not prevent the establishment of Ae. albopictus in Australia.

Item ID: 42680
Item Type: Article (Research - C1)
ISSN: 1938-2928
Keywords: Aedes albopictus, Aedes notoscriptus, Australia, cohabitation, population performance index
Funders: Australian Biosecurity Cooperative Research Centre for Emerging Infectious Disease
Date Deposited: 13 Apr 2016 03:16
FoR Codes: 11 MEDICAL AND HEALTH SCIENCES > 1117 Public Health and Health Services > 111799 Public Health and Health Services not elsewhere classified @ 100%
SEO Codes: 92 HEALTH > 9204 Public Health (excl. Specific Population Health) > 920404 Disease Distribution and Transmission (incl. Surveillance and Response) @ 100%
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