Relationships of the Ross River virus (Togoviridae: Alphavirus) vector, Aedes camptorhynchus (Thomson) (Diptera: Culicidae), to biotic and abiotic factors in saltmarshes of south-eastern Tasmania, Australia: a preliminary study

Carver, Scott; Goater, S.; Allen, Gordon; Rowbottom, Raylea; Fearnley, Emily; Weinstein, Philip

doi:10.1111/j.1440-6055.2011.00825.x

Cited by 10 publications

(15 citation statements)

References 22 publications

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“…This saltmarsh is known for its seasonally large populations of Ae. camptorhynchus (Robertson et al 2004, Carver et al 2011 Overall, this marsh ranges in elevation from 0.38 m to 3.2 m with a bank that reaches above 1.5 m along the Carlton River, a saline and tidal area of the river near its terminus with the ocean. Cores of vegetation and soil were collected from the saltmarsh to evaluate egg distribution of Ae.…”

Section: Field Samplingmentioning

confidence: 99%

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Mosquito distribution in a saltmarsh: determinants of eggs in a variable environment

Rowbottom

Carver

Barmuta

et al. 2017

Journal of Vector Ecology

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Two saltmarsh mosquitoes dominate the transmission of Ross River virus (RRV, Togoviridae: Alphavirus), one of Australia's most prominent mosquito-borne diseases. Ecologically, saltmarshes vary in their structure, including habitat types, hydrological regimes, and diversity of aquatic fauna, all of which drive mosquito oviposition behavior. Understanding the distribution of vector mosquitoes within saltmarshes can inform early warning systems, surveillance, and management of vector populations. The aim of this study was to identify the distribution of Ae. camptorhynchus, a known vector for RRV, across a saltmarsh and investigate the influence that other invertebrate assemblage might have on Ae. camptorhynchus egg dispersal. We demonstrate that vegetation is a strong indicator for Ae. camptorhynchus egg distribution, and this was not correlated with elevation or other invertebrates located at this saltmarsh. Also, habitats within this marsh are less frequently inundated, resulting in dryer conditions. We conclude that this information can be applied in vector surveillance and monitoring of temperate saltmarsh environments and also provides a baseline for future investigations into understanding mosquito vector habitat requirements. Journal of Vector Ecology 42 (1): 161-170. 2017.

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Section: Field Samplingmentioning

confidence: 99%

“…camptorhynchus is is known to be associated with samphire ( Sarcocornia sp .) habitats (Carver et al ). Similar affiliations with samphire ( Sarcocornia quinqueflora (Scott)) and salt water couch ( Sporobolus virginicus (Kunth)) have been identified for populations of Ae.…”

Section: Introductionmentioning

confidence: 99%

Mosquito distribution in a saltmarsh: determinants of eggs in a variable environment

Rowbottom

Carver

Barmuta

et al. 2017

Journal of Vector Ecology

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“…al . [ 26 ] where, after rainfall, 89% of faunal abundance comprised of Ae . camptorhynchus (56%) and ostracods (33%), increasing to 91% in drying conditions ( Ae .…”

Section: Methodsmentioning

confidence: 99%

“…camptorhynchus . In addition, a negative density relationship from field evidence suggests these species may interact via exploitative competition [ 26 ]. If exploitative competition is occurring between these species we expect it will impact mosquito vector development, survival, abundance and size [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Resource Limitation, Controphic Ostracod Density and Larval Mosquito Development

et al. 2015

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Aquatic environments can be restricted with the amount of available food resources especially with changes to both abiotic and biotic conditions. Mosquito larvae, in particular, are sensitive to changes in food resources. Resource limitation through inter-, and intra-specific competition among mosquitoes are known to affect both their development and survival. However, much less is understood about the effects of non-culicid controphic competitors (species that share the same trophic level). To address this knowledge gap, we investigated and compared mosquito larval development, survival and adult size in two experiments, one with different densities of non-culicid controphic conditions and the other with altered resource conditions. We used Aedes camptorhynchus, a salt marsh breeding mosquito and a prominent vector for Ross River virus in Australia. Aedes camptorhynchus usually has few competitors due to its halo-tolerance and distribution in salt marshes. However, sympatric ostracod micro-crustaceans often co-occur within these salt marshes and can be found in dense populations, with field evidence suggesting exploitative competition for resources. Our experiments demonstrate resource limiting conditions caused significant increases in mosquito developmental times, decreased adult survival and decreased adult size. Overall, non-culicid exploitation experiments showed little effect on larval development and survival, but similar effects on adult size. We suggest that the alterations of adult traits owing to non-culicid controphic competition has potential to extend to vector-borne disease transmission.

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“…The size and distribution of mosquito populations, particularly those species whose larvae develop in natural water bodies, can be strongly affected by environmental factors, such as rainfall and temperature (Ahumada et al , 2004; Carver et al , 2011; Beck-Johnson et al , 2013). Mosquito populations require water bodies that are sufficiently stable to allow the immature stages to develop from egg to adult; rainfall and evaporation rates influence the availability of such water bodies (Chase & Knight, 2003).…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal distribution, environmental drivers and community structure of mosquitoes in the Kaipara Harbour, New Zealand

Cane¹,

Hartley

Gradwell³

et al. 2017

Bull. Entomol. Res.

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Mosquito communities across the globe frequently comprise a mix of native and cosmopolitan species. New Zealand's mosquito communities are no exception. Here we describe the abundance, distribution and phenological patterns for a community of six mosquito taxa resident across the Kaipara Harbour region of northern New Zealand. Adult mosquitoes were sampled using baited light traps, serviced biweekly for 3½ years. Seasonal fluctuations in abundance of adults were examined for correlations with temperature and rainfall over the preceding weeks. Four endemic species comprised over 98% of the total catch, with Coquillettidia iracunda being the most abundant. Two introduced species, Aedes notoscriptus and Culex quinquefasciatus were widely distributed, but each comprised <1% of the total catch. Culiseta tonnoiri was the only species that appeared geographically restricted, occurring at one-third of the sites. Distinct temporal peaks in adult abundance were evident: Aedes antipodeus was most abundant in spring, Ae. notoscriptus and Cq. iracunda were most abundant in summer and Cx. quinquefasciatus was most abundant in autumn. Culiseta tonnoiri and Culex pervigilans were of variable abundance throughout the year. For all species examined, temporal variations in abundance were more strongly associated with temperature in the preceding weeks than with preceding rainfall. A better knowledge of the factors driving patterns of spatial and temporal abundance will allow an improved understanding of how non-native species may integrate themselves into resident mosquito communities.

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Relationships of the Ross River virus (Togoviridae: Alphavirus) vector, Aedes camptorhynchus (Thomson) (Diptera: Culicidae), to biotic and abiotic factors in saltmarshes of south-eastern Tasmania, Australia: a preliminary study

Cited by 10 publications

References 22 publications

Mosquito distribution in a saltmarsh: determinants of eggs in a variable environment

Mosquito distribution in a saltmarsh: determinants of eggs in a variable environment

Resource Limitation, Controphic Ostracod Density and Larval Mosquito Development

Spatial and temporal distribution, environmental drivers and community structure of mosquitoes in the Kaipara Harbour, New Zealand

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