caa a22 4500 397570732 CHVBK 20180308164840.0 cr unu---uuuuu 161202e19960401xx s 000 0 eng 10.1093/ee/25.2.321 doi (NATIONALLICENCE)oxford-10.1093/ee/25.2.321 Oviposition Site Resource Quantity and Larval Establishment for Orellia occidentalis (Diptera: Tephritidae) on Cirsium wheeleri [Elektronische Daten] [Steven M. Fondriest, Peter W. Price] We investigated factors associated with larval establishment of the tephritid fly Orellia occidentalis (Snow) on the thistle Cirsium wheeleri (Grey) Petrak. Adult tephritid appearance was temporally synchronized with the peak flowering of its host plant. During the 14-d period adult flies were active, 47% of the capitula were in a phenological state appropriate for female oviposition. Plant attributes such as plant height or capitulum size were good predictors of potential resource availability. The larval establishment pattern appeared nonrandom. We found a positive correlation between larval establishment and capitulum size; the largest capitula are also the rarest in the population. We propose that adult phenology is adaptive, enabling O. occidentalis access to the largest percentage of resources in the environment for egg laying and larval development. © 1996 Entomological Society of America Population Ecology nationallicence Orellia occidentalis nationallicence establishment nationallicence oviposition nationallicence Fondriest Steven M. Department of Biological Sciences, Box 5640, Northern Arizona University, Flagstaff AZ, 86011 aut Price Peter W. Department of Biological Sciences, Box 5640, Northern Arizona University, Flagstaff AZ, 86011 aut Environmental Entomology Oxford University Press 25/2(1996-04-01), 321-326 0046-225X 25:2<321 1996 25 ee https://doi.org/10.1093/ee/25.2.321 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.2.321 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fondriest Steven M. Department of Biological Sciences, Box 5640, Northern Arizona University, Flagstaff AZ, 86011 aut NATIONALLICENCE 700 1- Price Peter W. Department of Biological Sciences, Box 5640, Northern Arizona University, Flagstaff AZ, 86011 aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/2(1996-04-01), 321-326 0046-225X 25:2<321 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