caa a22 4500 39757097X CHVBK 20180308164841.0 cr unu---uuuuu 161202e19960401xx s 000 0 eng 10.1093/ee/25.2.423 doi (NATIONALLICENCE)oxford-10.1093/ee/25.2.423 Effects of Insolation and Body Orientation on Internal Thoracic Temperature of Nymphal Melanoplus packardii (Orthoptera: Acrididae) [Elektronische Daten] [Derek J. Lactin, Dan L. Johnson] The effect of insolation un body temperature of nymphal Packard grasshoppers, Melanoplus packardii Scudder, was measured in the field. Live nymphs were each restrained in a series of orientations to the sun, and insolation was adjusted using a shade cloth. Internal thoracic temperature was allowed to stabilize and was compared with that of a reference nymph restrained in a sunshade. Equilibrium body temperatures of insolated nymphs exceeded that of the reference nymph by an amount (∆Tb) which increased with energy intercepted (ENERGY) and insect size (SIZE) by a relationship of the form ∆Tb = a · ENERGY · SIZEb· When insect size was expressed as mass (grams), the estimates of a and b were 18.76 and -0.312, respectively (r2 = 0.6198); when insect size was expressed as length (millimeters), a and b were 826.66 and −1.133, respectively (r2 = 0.6463) These results allow estimation of equilibrium body temperature elevation of M. packardii nymphs from solar radiation, the zenith angle of the sun, insect size, and the orientation of the insect to the sun. © 1996 Entomological Society of America Physiological and Chemical Ecology nationallicence grasshopper nationallicence body temperature nationallicence thermoregulation nationallicence size effects nationallicence biophysics nationallicence Lactin Derek J. Land Resource Sciences Section, Agriculture and Agri-Food Canada Research Centre, P.O. Box .3000, Lethbridge, AB T1J 4B1 Canada aut Johnson Dan L. Land Resource Sciences Section, Agriculture and Agri-Food Canada Research Centre, P.O. Box .3000, Lethbridge, AB T1J 4B1 Canada aut Environmental Entomology Oxford University Press 25/2(1996-04-01), 423-429 0046-225X 25:2<423 1996 25 ee https://doi.org/10.1093/ee/25.2.423 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.2.423 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lactin Derek J. Land Resource Sciences Section, Agriculture and Agri-Food Canada Research Centre, P.O. Box .3000, Lethbridge, AB T1J 4B1 Canada aut NATIONALLICENCE 700 1- Johnson Dan L. Land Resource Sciences Section, Agriculture and Agri-Food Canada Research Centre, P.O. Box .3000, Lethbridge, AB T1J 4B1 Canada aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/2(1996-04-01), 423-429 0046-225X 25:2<423 1996 25 ee Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford