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Seasonal and Daily Patterns in Activity of the Western Drywood Termite, Incisitermes minor (Hagen).

Lewis V, Leighton S, Tabuchi R, Haverty M - Insects (2011)

Bottom Line: Termite activity was greater during the warmer summer months compared to the cooler winter months.Seasonal and daily fluctuations in termite activity were significantly associated with temperature, whereas humidity did not appear to have a noticeable effect on termite activity.Possible mechanisms that drive the seasonal and daily cycles in termite activity, as measured by AE technology, and the possible implications for inspections and post-treatment analysis are discussed.

View Article: PubMed Central - PubMed

Affiliation: Environmental Science, Policy, and Management, College of Natural Resources, University of California, Berkeley, CA 94720, USA.

ABSTRACT
Activity of colonies of the western drywood termite, Incisitermes minor, was measured with acoustic emission (AE) technology in five loquat (Eriobotrya japonica) logs. Termite activity, whether it was feeding, excavation or movement, was monitored for 11 months under ambient conditions in a small wooden structure maintained at the University of California Richmond Field Station. AE, temperature, and humidity data were measured in 3-minute increments. Termite activity was greater during the warmer summer months compared to the cooler winter months. Termites in all five logs displayed a similar daily cycle of activity, peaking in the late afternoon. Seasonal and daily fluctuations in termite activity were significantly associated with temperature, whereas humidity did not appear to have a noticeable effect on termite activity. Possible mechanisms that drive the seasonal and daily cycles in termite activity, as measured by AE technology, and the possible implications for inspections and post-treatment analysis are discussed.

No MeSH data available.


Related in: MedlinePlus

Mean daily activity patterns for I. minor in each of five logs (sensors 1–5). The heavy, dark line is the mean AE ring down count. The gray line is the temperature trace (°C) collected simultaneously for each AE data point. AE data for all logs were collected from 15 June 2008 to 15 May 2009.
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f3-insects-02-00555: Mean daily activity patterns for I. minor in each of five logs (sensors 1–5). The heavy, dark line is the mean AE ring down count. The gray line is the temperature trace (°C) collected simultaneously for each AE data point. AE data for all logs were collected from 15 June 2008 to 15 May 2009.

Mentions: Within a 24-hour day, AE ring down counts among the logs displayed a non-linear pattern of activity (Figure 3). These patterns were sinusoidal in shape for all sensors. Termite activity was lowest during the morning, increased in the afternoon, and peaked in late afternoon (1800), then declined until mid-morning. Based on the AE activity, the logs appeared to contain termite populations of different sizes: the smallest in log (sensor) 3, roughly three times larger in logs (sensors) 1, 4, and 5, and almost seven times larger in log (sensor) 2. The rise and fall in termite activity was correlated with temperature: activity increased as temperature rose (Figure 3). However, termite activity was apparently not significantly affected by relative humidity.


Seasonal and Daily Patterns in Activity of the Western Drywood Termite, Incisitermes minor (Hagen).

Lewis V, Leighton S, Tabuchi R, Haverty M - Insects (2011)

Mean daily activity patterns for I. minor in each of five logs (sensors 1–5). The heavy, dark line is the mean AE ring down count. The gray line is the temperature trace (°C) collected simultaneously for each AE data point. AE data for all logs were collected from 15 June 2008 to 15 May 2009.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4553448&req=5

f3-insects-02-00555: Mean daily activity patterns for I. minor in each of five logs (sensors 1–5). The heavy, dark line is the mean AE ring down count. The gray line is the temperature trace (°C) collected simultaneously for each AE data point. AE data for all logs were collected from 15 June 2008 to 15 May 2009.
Mentions: Within a 24-hour day, AE ring down counts among the logs displayed a non-linear pattern of activity (Figure 3). These patterns were sinusoidal in shape for all sensors. Termite activity was lowest during the morning, increased in the afternoon, and peaked in late afternoon (1800), then declined until mid-morning. Based on the AE activity, the logs appeared to contain termite populations of different sizes: the smallest in log (sensor) 3, roughly three times larger in logs (sensors) 1, 4, and 5, and almost seven times larger in log (sensor) 2. The rise and fall in termite activity was correlated with temperature: activity increased as temperature rose (Figure 3). However, termite activity was apparently not significantly affected by relative humidity.

Bottom Line: Termite activity was greater during the warmer summer months compared to the cooler winter months.Seasonal and daily fluctuations in termite activity were significantly associated with temperature, whereas humidity did not appear to have a noticeable effect on termite activity.Possible mechanisms that drive the seasonal and daily cycles in termite activity, as measured by AE technology, and the possible implications for inspections and post-treatment analysis are discussed.

View Article: PubMed Central - PubMed

Affiliation: Environmental Science, Policy, and Management, College of Natural Resources, University of California, Berkeley, CA 94720, USA.

ABSTRACT
Activity of colonies of the western drywood termite, Incisitermes minor, was measured with acoustic emission (AE) technology in five loquat (Eriobotrya japonica) logs. Termite activity, whether it was feeding, excavation or movement, was monitored for 11 months under ambient conditions in a small wooden structure maintained at the University of California Richmond Field Station. AE, temperature, and humidity data were measured in 3-minute increments. Termite activity was greater during the warmer summer months compared to the cooler winter months. Termites in all five logs displayed a similar daily cycle of activity, peaking in the late afternoon. Seasonal and daily fluctuations in termite activity were significantly associated with temperature, whereas humidity did not appear to have a noticeable effect on termite activity. Possible mechanisms that drive the seasonal and daily cycles in termite activity, as measured by AE technology, and the possible implications for inspections and post-treatment analysis are discussed.

No MeSH data available.


Related in: MedlinePlus