Different light conditions influence the activity of Eusthenia costalis Banks (Plecoptera: Eustheniidae)

摘要: Abstract Late instar nymphs of Eusthenia costalis Banks (Plecoptera: Eustheniidae) reduced the amount time they were active outside a refuge when illuminated by 40 W red incandescent light globe than with infrared emitting diodes. They nearly four times longer (54% ± 4%, N = 6; mean ± S.E. percentage observed active) (15% ± 4%; N = 6). The type chosen to facilitate observation could confound analysis behaviour predatory stoneflies. Eusthenia's sensitivity suggests that other stoneflies should be assayed for different wavelengths.