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Articles 1 - 2 of 2
Full-Text Articles in Biotechnology
Behavioural Assessment Of Visual Acuity In Bumblebees (Bombus Impatiens), Robert Gegear, Todd Macuda, Terence Laverty, Brian Timney
Behavioural Assessment Of Visual Acuity In Bumblebees (Bombus Impatiens), Robert Gegear, Todd Macuda, Terence Laverty, Brian Timney
Robert J. Gegear
measure resolution acuity in bumblebees (Bombus impatiens). Bees were required to discriminate between horizontal and vertical gratings in a Y-maze apparatus. The gratings had a mean luminance of 9 cd m−2 and a Michelson contrast of 84 %. For different bees, either the horizontal or vertical grating was rewarded. Rewarded gratings were associated with a sucrose and water solution (30 % sucrose by volume) and unrewarded gratings with plain water. Acuity estimates were established at several different viewing distances over several sessions using a method of constant stimuli. Visual acuity functions were generated from the performance data, and acuity thresholds …
Taxonomy And Biology Of A New Oecophoridae (Lepidoptera) From Central Chile, T. Heath Ogden
Taxonomy And Biology Of A New Oecophoridae (Lepidoptera) From Central Chile, T. Heath Ogden
T. Heath Ogden
The adult, larva, and pupa of Afdera jimenae Ogden & Parra sp. nov. are described and illustrated. Larvae live in leaf litter throughout all instars and are generalists feeding upon the fallen leaves of a number of different plant species of sclerophyllous forests. Comments on morphological details and bionomics of this species are given. This is the second species of Afdera know for Chile.