Spectral sensitivity of the ctenid spider Cupiennius salei.

ABSTRACT: The spectral sensitivity of adult male Cupiennius salei Keys, a nocturnal hunting spider, was studied in a behavioural test. As known from earlier behavioural tests, C. salei will walk towards a black target presented in front of a white background. In this study, a black target (size 42×70 cm) was presented in a white arena illuminated by monochromatic light in the range 365-695 nm using 19 monochromatic filters (half-width in the range 6-10 nm). In the first trial, the transmission of the optical filters was between 40% and 80%. In the second trial, the transmission was reduced to 5% using a neutral density filter. At the high intensity, the spiders showed a spectral sensitivity in the range 380-670 nm. In the second trial, the animals only showed directed walks if the illumination was i

SUBMITTER: Zopf LM 

PROVIDER: S-EPMC4112275 | biostudies-literature | 2013 Nov

REPOSITORIES: biostudies-literature