Bionomics of two forensically important blowfly species Chrysomya megacephala and Chrysomya putoria (Diptera: Calliphoridae) reared on four types of diet

Abstract The use of heterogeneous animal tissues for the rearing of necrophagous insect species can produce uneven biological data, which can compromise the determination of larval age and, consequently, estimates for post-mortem intervals. We investigated the development of two species, Chrysomya m...

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Bibliographic Details
Published in:	Forensic science international Vol. 210; no. 1; pp. 257 - 262
Main Authors:	Rabêlo, Kaynara C.N, Thyssen, Patrícia J, Salgado, Roberta L, Araújo, Manuela S.C, Vasconcelos, Simao D
Format:	Journal Article
Language:	English
Published:	Kidlington Elsevier Ireland Ltd 15-07-2011 Elsevier Elsevier Limited Elsevier Sequoia S.A
Subjects:	Abdomen Animals Beef Biological and medical sciences Calliphoridae Cattle Chickens Chrysomya megacephala Chrysomya putoria Comparative analysis Development Diet Diptera Diptera - growth & development Eggs Experiments Fishes Food Forensic entomology Forensic medicine Forensic sciences General aspects Insects Investigative techniques, diagnostic techniques (general aspects) Laboratories Larva - growth & development Legal medicine Life cycle Meat Medical sciences Mortality Necrophagous insects Pathology Public health. Hygiene Public health. Hygiene-occupational medicine Pupa - growth & development Rumen Sardinops Studies Tissues Development Life cycle Necrophagous insects Forensic entomology Chrysomya megacephala Nutrition Forensic science Entomology Legal medicine Insecta Forensic aspect Feeding Necrophagous Diet Calliphoridae Arthropoda Invertebrata Species Diptera
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Summary:	Abstract The use of heterogeneous animal tissues for the rearing of necrophagous insect species can produce uneven biological data, which can compromise the determination of larval age and, consequently, estimates for post-mortem intervals. We investigated the development of two species, Chrysomya megacephala and Chrysomya putoria (Diptera: Calliphoridae), reared on four substrates: minced beef (control) and semi-synthetic diets with the addition of sardine, rumen or chicken eggs. No differences in total developmental times were detected among larvae reared on different diets. Length and width of larvae were partially affected by the type of food. Third instar larvae and pupae of both species were heavier on beef treatment when compared with other substrates. Overall mortality was lower when beef was used as food. Longevity of adults and sex ratio were not negatively affected by the use of diets. Egg-based diet was the least effective for both species. Given the fact that several bionomical parameters of larvae reared on diets were close to those obtained when minced beef was offered, and considering the putrid odour, frequency of contamination and lack of homogeneity of animal tissue, semi-synthetic diets can be used for rearing C. megacephala and C. putoria.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0379-0738 1872-6283
DOI:	10.1016/j.forsciint.2011.03.022