Resumo
The life expectancy of Sarconesia chlorogaster (Wiedemann, 1830) reared in artificial diet and controlled temperatures chamber set at 27±1oC, 70±10% RH and 12 hours of photophase was analysed using entropy (H). Entropy (H) was used to quantify the distribuition of deaths between ages and then quantify the impact of mortality on life expectancy. The entropy values obtained for males (H=0,245) and females (H=0,299) were intermediary between the theoretical values of H=0,5 and H=0 suggesting a tendency toward rectangular distribuitions in both sexes. The effect of mortality across ali ages on expectation of life was different at each age. For males the highest values were found between days 10 and 20 and between days 15 and 25 for females. This íindings imply that small changes in female mortality will have a greater impact on female life expectancy than will have on male expectation of life.
Diptera; Calliphoridae; Sarconesia chlorogaster; entropy; life expectation; survivorship curves
Diptera; Calliphoridae; Sarconesia chlorogaster; entropy; life expectation; survivorship curves
Análise de sobrevivência e estimativa de entropia para Sarconesia chlorogaster (Wiedemann) (Diptera, Calliphoridae)1 1 Contribuição número 1122 do Departamento de Zoologia, Universidade Federal do Paraná.
Survival analysis and estimation of entropy of Sarconesia chlorogaster (Wiedemann) (Diptera, Calliphoridae)
Maurício O. Moura; Sionei R. Bonatto
Departamento de Zoologia, Universidade Federal do Paraná. Caixa Postal 19020, 81531-990 Curitiba, Paraná, Brasil. E-mail: moura@bio.ufpr.br; srbona@bio.ufpr.br
ABSTRACT
The life expectancy of Sarconesia chlorogaster (Wiedemann, 1830) reared in artificial diet and controlled temperatures chamber set at 27±1oC, 70±10% RH and 12 hours of photophase was analysed using entropy (H). Entropy (H) was used to quantify the distribuition of deaths between ages and then quantify the impact of mortality on life expectancy. The entropy values obtained for males (H=0,245) and females (H=0,299) were intermediary between the theoretical values of H=0,5 and H=0 suggesting a tendency toward rectangular distribuitions in both sexes. The effect of mortality across ali ages on expectation of life was different at each age. For males the highest values were found between days 10 and 20 and between days 15 and 25 for females. This íindings imply that small changes in female mortality will have a greater impact on female life expectancy than will have on male expectation of life.
Key words: Diptera, Calliphoridae, Sarconesia chlorogaster. entropy, life expectation, survivorship curves
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AGRADECIMENTOS. Aos Doutores Cláudio Von Zuben, Emygdio L.A. Monteiro-Filho e Luciane Marinoni pela leitura crítica do manuscrito.
Recebido em 20.V.1998; aceito em 28.IV.1999.
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Datas de Publicação
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Publicação nesta coleção
25 Jun 2009 -
Data do Fascículo
1999
Histórico
-
Aceito
28 Abr 1999 -
Recebido
20 Maio 1998
