caa a22 4500 386361614 CHVBK 20180307111917.0 cr unu---uuuuu 161130e198904 xx s 000 0 eng 10.4039/Ent121363-4 doi S0008347X00031734 pii (NATIONALLICENCE)cambridge-10.4039/Ent121363-4 DEVELOPMENT OF TWO RANGELAND GRASSHOPPERS AT CONSTANT TEMPERATURES: DEVELOPMENT THRESHOLDS REVISITED [Elektronische Daten] A study was conducted to examine the relationship between development rate and constant temperatures (14, 21, 24, 27, 33, 36, 40, and 45°C) for the rangeland grasshoppers Melanoplus sanguinipes (F.) and Aulocara elliotti (Thomas). Non-linear regression was used to generate estimates of lower development thresholds. The chosen model provided for a concave-shaped development rate function at temperatures above the lower threshold and required fewer parameters than previous models. Although experimental results suggested that no precise estimates of upper development thresholds could be obtained, previous field studies indicate that preferred body temperatures may be lower than ambient temperatures and probably are related in part to the thermoregulatory abilities of the two species studied. Results will be of interest to insect ecologists and those studying grasshopper biology as well as researchers and pest managers interested in predicting grasshopper development. Copyright © Entomological Society of Canada 1989 Kemp William P. U.S. Department of Agriculture, Agricultural Research Service, Bozeman, Montana, USA 59717-0001 Dennis Brian College of Forestry, Wildlife, and Range Sciences, University of Idaho, Moscow, Idaho, USA 83843 The Canadian Entomologist Cambridge University Press 121/4-5(1989-04), 363-371 0008-347X 121:4-5<363 1989 121 TCE https://doi.org/10.4039/Ent121363-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.4039/Ent121363-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kemp William P. U.S. Department of Agriculture, Agricultural Research Service, Bozeman, Montana, USA 59717-0001 NATIONALLICENCE 700 1- Dennis Brian College of Forestry, Wildlife, and Range Sciences, University of Idaho, Moscow, Idaho, USA 83843 NATIONALLICENCE 773 0- The Canadian Entomologist Cambridge University Press 121/4-5(1989-04), 363-371 0008-347X 121:4-5<363 1989 121 TCE CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge