dispersão larval pós-alimentar de lucilia sericata (diptera, calliphoridae) em condições de laboratório post-feeding larval dispersion of lucilia sericata (diptera, calliphoridae) in laboratory

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ID: 178806
2010
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Abstract
Os dípteros califorídeos são os primeiros indivíduos a compor a sucessão faunística de cadáveres em decomposição, auxiliando assim na estimativa do intervalo pós-morte. Estudos de dispersão pós-alimentar de suas larvas possuem relevância para investigações médico-criminais. Diante disto, uma arena circular, simulando o ambiente natural, foi montada em laboratório a fim de verificar-se a dispersão larval radial pós-alimentar de Lucilia sericata (Meigen, 1826), tentando assim estabelecer relações entre as variáveis peso, distância e profundidade de enterramento na arena. Os resultados demonstraram que 45% das pupas foram recuperadas a uma profundidade compreendida entre 6 cm e 8 cm e a uma distância entre 33 cm e 45 cm do centro da arena. Não houve diferenças significativas quanto à propagação e profundidade de enterramento de machos, fêmeas e indivíduos inviáveis. Com relação ao peso, verificou-se que a média das fêmeas (x = 32,35 mg) foi superior a dos machos (x = 30,28 mg). A análise de correlação e de regressão entre peso e distância percorrida e entre peso e profundidade foram positivas, ou seja, pupas oriundas de larvas mais pesadas propagaram e se aprofundaram mais. O experimento permitiu ainda concluir que uma arena circular possibilita o deslocamento das larvas em todas as direções.
Calliphorid flies are the first organisms of the faunal succession associated with decomposing bodies, and can help in the estimation of post-mortem interval. Therefore, studies on post-feeding larval dispersion are relevant to medico-criminal investigations. A circular arena simulating the natural environment was built in the laboratory in order to examine the radial post-feeding larval dispersion of Lucilia sericata (Meigen, 1826) and the relationship between weight, distance, and depth of burial. Our findings indicated that most pupae were recovered at a depth between 6 cm and 8 cm and at a distance of 33 cm and 45 cm from the center of the arena. No significant differences were found regarding the propagation and depth of males, females, and non-viable individuals. The mean weight of females (x = 32.35 mg) was higher than that of males (x = 30.28 mg). The correlation and regression analysis between weight and distance, and between weight and depth was directly proportional suggesting that heavier pupae dispersed farther and deeper. Our study also showed that a circular arena allows the dispersion of larvae into all directions.
Reference Key
pires2010iheringia:disperso Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Sabrina M Pires;Cristine R Zimmer;Marcial C Cárcamo;Paulo B Ribeiro
Journal Yakugaku zasshi : Journal of the Pharmaceutical Society of Japan
Year 2010
DOI
10.1590/S0073-47212010000300011
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212010000300011
Keywords
forensic entomology

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