关键词: 大头金蝇, 食物, 卵巢发育, 产卵动态

Abstract: Objective To know the impact of the blowfly Chrysomya megacephala on different foods on their ovarian development and oviposition dynamics, to provide a theoretical basis for studying reproductive behavior of the flies. Methods After the adults emerged, the females were allowed to feed on pig manure, pork, cooked eggs and powder milk, and the development of the ovary was observed after feeding at different time. One-way analysis of variance (ANOVA)was used to compare the differences in ovarian developmental length when feeding on different foods. Results The flies that fed on cooked eggs and pork, completed ovary development on the 10^th and 5^th days respectively, while the ovarian development has not yet been seen until 20 days when flies fed on pig manure or powder milk. The ovary length of flies that fed on pork was greater than that in other three groups, the difference was statistically significant (1 d:F=13.054, ν=3, P=0.000; 3 d:F=84.584, ν=3, P=0.000; 5 d:F=42.065, ν=3, P=0.005). The female C. megacephala that fed on pork needed 5 d to complete the ovarian development and began to lay eggs; it began the first oviposition peak on the 7th day, then reached the highest of 16.6 mg on the 9th day, ranging 6.0-10.0 mg. Conclusion The adults C. megacephala which fed the pig manure and milk powder could not complete the ovarian development, the adults that fed on the cooked eggs were slow to develop ovaries. The ovarian development of the pork-feeding adults was the fastest; oviposition dynamics were affected by nutrient sources.

Key words: Chrysomya megacephala, Food, Ovarian development, Oviposition dynamics