caa a22 4500 397572271 CHVBK 20180308164845.0 cr unu---uuuuu 161202e19960601xx s 000 0 eng 10.1093/ee/25.3.570 doi (NATIONALLICENCE)oxford-10.1093/ee/25.3.570 Temporal Patterns in Feeding of Grasshoppers (Orthoptera: Acrididae): Importance of Nocturnal Feeding [Elektronische Daten] [Jeffrey A. Lockwood, Jane M. Struttmann, Carlie J. Miller] Rangeland grasshoppers were sampled from the Western High Plains ecoregion every 6 h over 2 periods of 2 d each during September 1992. The crop contents of the grasshoppers were classified as full (>80% filled), partially full (5-80% filled), or empty (>5% filled). Rangeland species often engaged in nocturnal feeding, in some cases more commonly than diurnal feeding. Across all species, 44% of individuals captured at midnight and sunrise had full crops, compared with 41% captured at midday and sunset. The frequencies of full and not-full (partially full and empty) crops across sampling times differed significantly between species and between sexes within 4 of the 5 dominant species. Laboratory bioassays of the rate of food (dyed filter paper) passage in field-collected grasshoppers, at 10, 21, and 32°(; during light and dark conditions, revealed that crops were emptied within 4 h of feeding. Seasonal and spatial variation in temporal feeding was studied at 3 sites in July, August, and September 1994. The temporal patterns of crop fullness differed significantly among species and sexes at each sampling location and date. The frequencies of full crops also differed significantly within males and females of most species between sampling dates (at a single site) and between sites (at a single date). Temporal feeding patterns were highly variable. Four types of feeding patterns were apparent: diurnal, nocturnal, continuous, and intermittent. Temporal niche partitioning resulted in constant feeding by a grasshopper assemblage. Nocturnal feeding was an important component of this partitioning; 78% of the classified cases involving substantial nocturnal feeding and 50-75% of all grasshoppers sampled had full crops at midnight and sunrise. © 1996 Entomological Society of America Community and Ecosystem Ecology nationallicence Acrididae nationallicence feeding periodicity nationallicence nocturnal feeding nationallicence temporal niche partitioning nationallicence Lockwood Jeffrey A. Department of Plant, Soil and Insect Sciences, University of Wyoming, Laramie, WY 82071 aut Struttmann Jane M. Department of Plant, Soil and Insect Sciences, University of Wyoming, Laramie, WY 82071 aut Miller Carlie J. Department of Plant, Soil and Insect Sciences, University of Wyoming, Laramie, WY 82071 aut Environmental Entomology Oxford University Press 25/3(1996-06-01), 570-581 0046-225X 25:3<570 1996 25 ee https://doi.org/10.1093/ee/25.3.570 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.3.570 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lockwood Jeffrey A. Department of Plant, Soil and Insect Sciences, University of Wyoming, Laramie, WY 82071 aut NATIONALLICENCE 700 1- Struttmann Jane M. Department of Plant, Soil and Insect Sciences, University of Wyoming, Laramie, WY 82071 aut NATIONALLICENCE 700 1- Miller Carlie J. Department of Plant, Soil and Insect Sciences, University of Wyoming, Laramie, WY 82071 aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/3(1996-06-01), 570-581 0046-225X 25:3<570 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