A method for conducting mark-release-recapture studies of the graceful sun-moth Synemon gratiosa (Lepidoptera: Castniidae)

WA Museum Records and Supplements | Updated 5 years ago

ABSTRACT – A mark-release-recapture methodology designed for monitoring the graceful sun-moth Synemon gratiosa Westwood is described. Because of the sun-moth’s small size and fragility, traditional marking methods were found to be inappropriate. To enable marks to be applied and minimise handling, individual sun-moths were temporarily immobilised using either ethyl acetate or by cooling. A series of 1–3 dots were then placed on the forewing(s) using metallic ink permanent marker pens. By varying the location and colour of the dots, up to 232 individuals could be given unique marks. The use of ethyl acetate resulted in several deaths and had a large effect on recapture rate and apparent survival. The cooling method, however, resulted in no detectable effect of marking on subsequent survival. The method is suitable for small or fragile Lepidoptera and other insects.