Post-Graduate Program in Animal Biology, Laboratory of Insects of Forensic Importance, Department of Zoology, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego, s.n., Cidade Universitária, 50670-420, Recife, Pernambuco, Brazil.
Laboratory of Insects of Forensic Importance, Department of Zoology, Universidade Federal de Pernambuco, Recife, Brazil.
Int J Legal Med. 2024 Sep;138(5):2193-2201. doi: 10.1007/s00414-024-03242-y. Epub 2024 Apr 30.
Peckia (Peckia) chrysostoma (Wiedemann, 1830) (Diptera: Sarcophagidae) is a colonizer of cadavers in the Neotropical Region. Nevertheless, data on development for the P. (P.) chrysostoma (e.g., instar duration) and behavioral strategies used by the species for locating and colonizing a corpse are scant. We aimed to explore bionomic and reproductive aspects of the flesh fly P. (P.) chrysostoma, and in this article we: (a) provide quantitative data on the life cycle of P. (P.) chrysostoma; (b) present bionomic measurements (length and weight) of larvae and pupae; (c) describe intrauterine egg and larvae development; and (d) analyze the ovo/larviposition behavior by gravid females. Females showed ovaries with discernible eggs and larvae between 8 and 10 days (x̅ = 23.3 eggs/female). This study reports the first observation of egg deposition, an atypical behavior for the species. The average development time for immature stages was 22.24 h and 21.36 h for 1st and 2nd respectively, and 3rd showed an average development time of 80.47 h. Pupa had the longest duration (x̅ = 295.69 h). A direct increase was observed in weight (P < 0.05) and length (P < 0.05) throughout time. The average survival time of males and females is approximately 30 days. This study expands the knowledge on P. (P.) chrysostoma, such as facultative ovoviviparity under laboratory conditions and the life cycle, which may benefit future studies for accuracy in entomology-based estimation of minimum post-mortem interval (min PMI).
美洲肉蝇（Peckia (Peckia) chrysostoma (Wiedemann, 1830））（双翅目：麻蝇科）是新热带地区尸体的殖民者。然而，关于 P.（P.）chrysostoma（例如，龄期持续时间）的发育数据以及该物种用于定位和殖民尸体的行为策略很少。我们旨在探讨肉蝇 P.（P.）chrysostoma 的生物生态学和生殖方面，在本文中，我们：（a）提供 P.（P.）chrysostoma 生命周期的定量数据；（b）介绍幼虫和蛹的生物测量（长度和重量）；（c）描述子宫内卵和幼虫的发育；（d）分析雌蝇的卵/幼虫产卵行为。雌性的卵巢中可见到 8 至 10 天（x̅ = 23.3 个/雌蝇）之间的卵和幼虫。本研究首次观察到卵的沉积，这是该物种的一种非典型行为。未成熟阶段的平均发育时间分别为 22.24 h 和 21.36 h，第 3 阶段的平均发育时间为 80.47 h。蛹的持续时间最长（x̅ = 295.69 h）。体重（P < 0.05）和长度（P < 0.05）随时间呈直接增加。雌雄的平均存活时间约为 30 天。本研究扩展了对 P.（P.）chrysostoma 的了解，例如在实验室条件下的兼性卵胎生和生命周期，这可能有助于未来基于昆虫学的最小死后间隔（min PMI）估计的准确性研究。
