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Ecology and Health Laboratory Department of Public Health University of Otago Wellington. Kapiti Expressway hearing Mosquitoes around Waikanae … some field data & health concerns Dr M.McIntyre. Trapping: CDC (USA) surveillance std

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Ecology and Health Laboratory Department of Public Health University of Otago Wellington

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Ecology and health laboratory department of public health university of otago wellington

Ecology and Health Laboratory

Department of Public Health

University of Otago

Wellington

Kapiti Expressway hearing

Mosquitoes around Waikanae

… some field data & health concerns

Dr M.McIntyre


Ecology and health laboratory department of public health university of otago wellington

  • Trapping:

    • CDC (USA) surveillance std

    • residential + peri-urban bush remnants + nearby paddocks

    • ~ 2-wk intervals Oct-Apr

    • Total sampling effort

    • 998 trap.nights

    • >18 000 mosquitoes

Total mosquitoes Oct.-Apr

location 02-03 03-04

_____________________

Karori 5247

Belmont 10 37

Waikanae76317 251

_____________________

(Snell A. PhD thesis 2006 UOW)


Ecology and health laboratory department of public health university of otago wellington

Australian surveillance scale (Doggett et al 2001)

Category no./trap.night

Low <50

Moderate 50-100

High 101-1000

Very high >1000

Extreme 10 000

   

Waikanae(12 sites, 338 trap.nights)

Oct

April


Ecology and health laboratory department of public health university of otago wellington

Max. 5728

1 Oct.Month 3 Apr


Ecology and health laboratory department of public health university of otago wellington

WeatherPpm airport (Data NIWA)

Species breakdown


Ecology and health laboratory department of public health university of otago wellington

A bad disease record overseas!

Introduced

Aedes notoscriptus - “the striped mosquito”

Culexquinquefasciatus - ‘Southern house’ mosquito (USA)

Native

Cxpervigilans – “vigilant mosquito”

Aeantipodeus – bush mosquito, “the ‘singer”

Coquellitidiairacunda – “the angry, mosquito”

Cqtenuipalpus – rare, little known

Maorigoeldiaagyropus – probably extinct in area (Snell, Derraik, McIntyre 2005)

(Photo: Landcare Res)

Vector ability of some native spptested in US lab for MAF Biosecurity (Kramer et al 2010)


Ecology and health laboratory department of public health university of otago wellington

  • Concerns

  • standing water will extends breeding habitat

  • planted wetlands + vegetation corridors + open water surface creates humidity corridors which facilitate adult dispersal

  • exacerbation of seasonal biting nuisance

  • adjacent homeowners - especially where low-lying

  • irruption in favourable seasonal/weather conditions (flooding; ?drought)

  • avian malaria in native birds

  • future climate change & arbovirus threat

  • Measures

  • construction & planting of ponds

  • ecological function

  • pre-construction survey to establish baseline & best monitoring sites (seasonal timing important)

  • construction period contingencies

  • post-construction surveys

  • development of contingencies


Ecology and health laboratory department of public health university of otago wellington

MfE predict +2.1- 2.2oC

1990-2090

  • Warmer spring-autumn conditions will increase …

  • mosquito breeding

  • build up of virus – in mosquitoes (& wildlife – birds/possums)

  • range & seasonal expansion of anthropophilic mosquitoes

  • outdoor lifestyles / human exposures

  • flooding/ drought episodes

… thank-you


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