Survival and development of the forensically important blow fly, Calliphora varifrons (Diptera: Calliphoridae) at constant temperatures
| Autor: | David F. Cook, Ian R. Dadour, Sasha C. Voss, Wei-Feng Hung |
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| Rok vydání: | 2014 |
| Předmět: |
Larva
Time Factors Diptera Forensic Sciences Temperature General Medicine Biology biology.organism_classification Models Biological Pathology and Forensic Medicine Calliphora varifrons Pupa Toxicology Animal science Nonlinear Dynamics Linear Models Animals Body Size Instar Forensic entomology Calliphoridae Constant (mathematics) Entomology Post-mortem interval |
| Zdroj: | Forensic Science, Medicine, and Pathology. 10:314-321 |
| ISSN: | 1556-2891 1547-769X |
| DOI: | 10.1007/s12024-014-9565-4 |
| Popis: | The influence of temperature on the development of the forensically important blow fly, Calliphora varifrons Malloch 1932 (Diptera: Calliphoridae), was investigated at seven constant temperatures ranging from 12 to 30 °C. C. varifrons completed development between 12 and 27 °C. At 30 °C larvae formed pupae but did not successfully emerge. Temperature significantly influenced development time, mortality, maximum larval length, and adult body size. Development time (larviposition to adult emergence) ranged from 16.65 ± 0.17 days at 27 °C to 49.93 ± 0.26 days at 12 °C. Development rate was essentially linear throughout the 12-27 °C temperature range. Linear estimates of lower developmental threshold and thermal requirement (K) for development of C. varifrons were 4.20 °C and 368.46 ± 26.38 K. At 30 °C, a slight inhibitory effect of high temperature on third instar development rate was observed followed by a rapid decline when subsequent development and survival ceased. Nonlinear estimates of lower developmental threshold for third instar development were comparatively higher (6.29 °C). Nonlinear estimates of optimal developmental temperature and upper lethal developmental threshold were 25.94 and 32.13 °C respectively. Mortality was high at both temperature extremes (12 and 27 °C) and lowest between 18 and 24 °C. Maximum larval length was inversely related to temperature. Adult body size was significantly smaller at 12 °C, peaked at 18 °C, and declined as temperatures increased. The species-specific development data presented are the first available for C. varifrons for use by forensic practitioners for estimation of minimum time since death. |
| Databáze: | OpenAIRE |
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