Effect of weather conditions on the flight activity of Nigerian blackflies (Diptera

Simuliidae)

D. M. Roberts, R. J. Irving-Bell

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A vehicle-mounted net was used to make hourly catches of blackflies at 700-1000 m altitude in the River Assob valley, central Nigeria, on 20 days during the dry season. Pearson Correlation Matrix analysis of the collection data and meteorology showed that the main factors affecting flight activity of each of the four most abundant blackfly species were primarily light intensity and secondly wind velocity, whereas relative humidity was the least important factor. Flight activity showed a negative linear regression against wind, with some activity occurring in wind speeds up to 15 km/h. Distance-weighted least-squares (DWLS) regressions showed little correlation of temperature with activity for Simulium hargreavesi and S.adersi, but S.squamosum and S.vorax had small peaks at 28°C and 31°C, respectively. DWLS regression against light intensity showed an activity peak at 6000 lux, except in Simulium adersi.

Original languageEnglish
Pages (from-to)137-144
Number of pages8
JournalMedical and Veterinary Entomology
Volume10
Issue number2
Publication statusPublished - Apr 1996

Fingerprint

Simuliidae
flight activity
Simulium
Weather
light intensity
Diptera
wind speed
least squares
flight
weather
wind velocity
Least-Squares Analysis
meteorology
Nigeria
dry season
relative humidity
valleys
Meteorology
Light
valley

Keywords

  • Blackflies
  • Flight activity
  • Humidity
  • Light intensity
  • Meteorology
  • Nigeria
  • S.hargreavesi
  • S.squamosum
  • S.vorax
  • Simulium adersi
  • Temperature
  • Wind

ASJC Scopus subject areas

  • Insect Science
  • Earth and Planetary Sciences(all)
  • Environmental Science(all)
  • Medicine(all)
  • veterinary(all)

Cite this

Effect of weather conditions on the flight activity of Nigerian blackflies (Diptera : Simuliidae). / Roberts, D. M.; Irving-Bell, R. J.

In: Medical and Veterinary Entomology, Vol. 10, No. 2, 04.1996, p. 137-144.

Research output: Contribution to journalArticle

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