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J Insect Physiol

Title:		"Day-night temperature differential, rather than mean temperature, determines age of sexual maturation in Straicosta albicosta (Noctuidae)"
Author(s):		Konopka JK; McNeil JN;
Address:		"Department of Biology, Western University, London N6A 5B7, Canada. Electronic address: jkonopk@uwo.ca. Department of Biology, Western University, London N6A 5B7, Canada"
Journal Title:		J Insect Physiol
Year:		2017
Volume:		20171020
Issue:
Page Number:		86 - 90
DOI:		10.1016/j.jinsphys.2017.10.010
ISSN/ISBN:		1879-1611 (Electronic) 0022-1910 (Linking)
Abstract:		"While pheromone traps have been effectively used to monitor the recent range expansion of the western bean cutworm (WBC), very little is known about the pheromone mediated reproductive biology of this species. The age at which females initiated calling (the behaviour associated with the release of the sex pheromone), and the pattern of calling on the first three nights following sexual maturation were determined for virgin females held under four temperature regimes (25:20; 25:15; 20:15; 20:10?ª+ degrees C L:D and 16L:8D photoperiod), and two RH (60 and 80%). Regardless of the rearing conditions the pre-calling period (PCP) was always several days post emergence, supporting the hypothesis that WCB is a migrant species. However, surprisingly the length of the PCP was not directly related to mean temperature but rather to the temperature differential between the photophase and the scotophase. The duration of calling increased with female age, but unlike in other moths was not affected by the abiotic factors tested. The relative insensitivity to temperature and humidity, when compared with many other moth species, may be related to the WBC being a univoltine species with a mid-summer flight period. Consequently, there would not be strong selection pressure for plasticity in calling behavior when compared with the case of multivoltine species that experience a wide range of environmental conditions during different seasonal flight periods"
Keywords:		*Animal Communication Animals Female Humidity Male Moths/*growth & development *Sexual Maturation Temperature Calling behaviour Migratory strategy Pre-reproductive period Sexual maturation Voltinism;
Notes:		"MedlineKonopka, Joanna K McNeil, Jeremy N eng Research Support, Non-U.S. Gov't England 2017/10/25 J Insect Physiol. 2017 Nov; 103:86-90. doi: 10.1016/j.jinsphys.2017.10.010. Epub 2017 Oct 20"