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Influence of ambient and thoracic temperatures upon sexual behaviour of the gypsy moth, Lymantria dispar
Author(s) -
CARDE R. T.,
HAGAMAN T. E.
Publication year - 1983
Publication title -
physiological entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 57
eISSN - 1365-3032
pISSN - 0307-6962
DOI - 10.1111/j.1365-3032.1983.tb00327.x
Subject(s) - lymantria dispar , gypsy moth , biology , wing , takeoff , jerk , zoology , anatomy , botany , lepidoptera genitalia , acceleration , materials science , physics , thermodynamics , composite material , classical mechanics
. In an ambient temperature ( T a ) range of 18–28°C, thoracic temperatures ( T th ) of individual male Lymantria dispar (L.), caught at flight in the field, ranged from 21 to 36.5°C, with a correlation coefficient of 0.63 between T th and ambient temperature ( T a ). Ambient temperature (and insolation) altered the insect's body temperature and the probabilities, latencies, and durations of preflight responses to pheromone. In a wind tunnel at 16 and 20°C, quiescent males exposed to pheromone raised their T th by sustained wing fanning from 17 and 21°C, respectively, to c. 24°C before takeoff. At 24 and 28°C ambient, T th rose by takeoff to 28 and 31°C, respectively. The latencies of male wing fanning in response to pheromone decreased from 1.44 min at 16°C ambient, to 0.58 min at 20°C, to 0.26 min at 24°C, and to 0.16min at 28°C. The components of behaviour (antennal twitch, body jerk, step and wing tremor) that occurred between quiescence and wing fanning were more frequent at ambients of 16 and 20°C than at 24 and 28°C.