首页 | 本学科首页   官方微博 | 高级检索  
     


Cold tolerance in diapausing and non-diapausing stages of the flesh fly, Sarcophaga crassipalpis
Authors:RICHARD E. LEE Jr   DAVID L. DENLINGER
Affiliation:Department of Zoology, Miami University - Hamilton, Hamilton, Ohio;*Department of Entomology, Ohio State University, Columbus, Ohio, U.S.A.
Abstract:ABSTRACT. Supercooling points (SCP) and low temperature tolerance were determined for larval, pupal and adult stages of Sarcophaga crassipalpis Macquart (Diptera: Sarcophagidae). No stage tolerates tissue-freezing. Ontogenetic changes in SCP profiles are similar for comparable developmental stages of diapause and non-diapause groups. Feeding larvae have SCPs near -7°C which decrease to -11°C in the postfeeding wandering phase of the final larval instar. The lowest SCPs are recorded for pupae at -23°C. The capacity to survive at -17°C varies with age of the diapausing pupae: 10-day-old pupae are less cold tolerant than pupae that have been in diapause for 45–80 days. Although the SCP of non-diapausing pupae is as low as in diapausing pupae, non-diapausing pupae are extremely sensitive to low temperature exposure and do not survive to adult eclosion when exposed to -17°C for as little as 20 min. The use of hexane to break pupal diapause has no effect on SCPs or low temperature tolerance.
Keywords:Cold-hardiness    pupal diapause    supercooling point    flesh flies    Sarcophaga crassipalpis.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号