2. What organism is a major disease carrier in the Harris county area?

3. Mosquitoes

4. What environmental factors may influence mosquitoes activities?

5. Where do you find this information?

6. Which data would be the most useful to your study?

7. Is the data exactly as you need it, or might you have to select or process the data?

8. A Quantitative Two-Year Mosquito Study at Three Northern Harris County Residential Sites

9. Purpose
To determine the population dynamics at residential sites in northern Harris County. Most testing is done at non-residential sites but most complaints come from residential sites. Little is known of the area studied. Hopefully this study will help Harris County Mosquito Control in their pursuits.

10. Materials & Methods
A CDC Light Trap was placed in 3 residential sites (2, 3, & 5)
Traps were loaned by Harris County Mosquito Control
Batteries were provided by HCMC
Dry ice was provided by North Harris College

11. Materials & Methods

12. Materials & Methods Collections made Sundays and Wednesdays each week
October 1, 2000 till October 31, 2002 (Site 5 for only 1 year)
Approx. 5 pm till 7 am

13. Materials & Methods Collections were frozen for 4+ hours
Insects were categorized as Gnats, Female mosquitoes, Male mosquitoes, and others
Results were recorded
Mosquitoes were pinned on points and placed in insect storage boxes
Females were attempted to be ID by students

14. Sites 2 5 3

15. Site 3 This site is a new subdivision from the 1990s
The site is surrounded by undeveloped natural areas
Open fields and wooded areas are located within half a mile
A new subdivision was added a mile from this site (puddles & low drainage)

16. Site 3

17. Site 3

18. Weather Data
Both Daily and Hourly Data was collected by NOAA taken at IAH (Bush Intercontinental Airport)
Hourly Data was limited to collection days & times (4:53 pm  7:53 am)
Temperature
Humidity (no avg. - access program needed)
Wind Speed
Precipitation
(Max, Min, & Avg.)

19. Results

20. Use the chart tool to graph data.
Using the data given in the excel file from site 3, what trends do use notice?
Use the chart tool to graph data.

21. Population Peaks

22. Population Peaks

23. Weather Data Analysis Site 3 was used
Closest to the IAH – fewest weather variations
Largest numbers of mosquitoes
25 Collections of 50 or more mosquitoes were compared (significant #)
Temperature
Humidity
Wind Speed
Precipitation

24. Temperature

28. Humidity

32. Wind Speed

36. Precipitation

38. Conclusion Temperature Humidity Maximum – most > 700 F
Minimum – All > 500 F
Average – Most > 600 F
Humidity
Maximum – 100% / All > 90%
Minimum – Almost all > 40% - Most > 50%
Average – Most > 80% / Many > 90%

39. Conclusion Wind speed Total Precipitation – Most < 0.05 inches
Maximum – All < 15 mph - Most < 10 mph
Minimum – 0 mph / None > 6 mph
Average – All < 8.0 mph / Most < 6.0 mph
Total Precipitation – Most < 0.05 inches

40. Next Analyze weather data more closely
Study with weather station on location
Studies of NHC campus for better mosquito control locally
Species studies
Time studies
Bird study

41. Thanks to: Dr. David Sam Tom Hobbs Cris Neuman Brenda Wellmeyer
Johann Barretta
Roger Dikdan
Tom Hobbs
Roy Kulland
Aline Palini
Cris Neuman
Miquel Truilo
Brenda Wellmeyer
Jason Potts