caa a22 4500 397570899 CHVBK 20180308164841.0 cr unu---uuuuu 161202e19960401xx s 000 0 eng 10.1093/ee/25.2.436 doi (NATIONALLICENCE)oxford-10.1093/ee/25.2.436 Behavioral Responses to Light and Thermal Gradients by the Western Drywood Termite (Isoptera: Kalotermitidae) [Elektronische Daten] [Brian J. Cabrera, Michael K. Rust] The hypothesis that western drywood termite, Incisitermes minor (Hagen), nymphs are negatively phototactic was tested. Significantly more nymphs were found under the covered half of a petri dish than under the uncovered half exposed to either incandescent or fluorescent light, whereas there was no significant preference for either the covered or uncovered side when exposed to red darkroom light. The behaviors of I. minor nymphs when placed on temperature gradients for 24 h at 10, 30, or 50% RH were videotaped, analyzed, and quantified to test the hypothesis that I. minor nymphs actively avoid and move away from hot and cold temperatures. I. minor nymphs avoided temperatures >45°C and <12°C, formed aggregations away from the hottest or coldest temperatures and aggregated in the absence of a gradient. The distributions of termites on heated or cold gradients were significantly different from the controls and were not affected by relative humidity. Aggregations formed faster on heated gradients than on cool gradients while both formed faster than on the controls. Mean temperature preference values (mTPV) were significantly higher than the coolest temperatures on the cold gradients and significantly lower than the hottest temperatures on the heated gradients. Relative humidity did not have a significant effect on mTPV. The results of this study provide strong support for the theory that I. minor colonies relocate within structures or pieces of wood to avoid unfavorable conditions within their galleries. © 1996 Entomological Society of America Physiological and Chemical Ecology nationallicence Incisitennes minor nationallicence avoidance nationallicence behavior nationallicence temperature gradients nationallicence phototaxis nationallicence Cabrera Brian J. Department of Entomology, University of California, Riverside, CA aut Rust Michael K. Department of Entomology, University of California, Riverside, CA aut Environmental Entomology Oxford University Press 25/2(1996-04-01), 436-445 0046-225X 25:2<436 1996 25 ee https://doi.org/10.1093/ee/25.2.436 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.2.436 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cabrera Brian J. Department of Entomology, University of California, Riverside, CA aut NATIONALLICENCE 700 1- Rust Michael K. Department of Entomology, University of California, Riverside, CA aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/2(1996-04-01), 436-445 0046-225X 25:2<436 1996 25 ee Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford