The reproductive performance of the parasitoid Habrobracon hebetor (Say) (Hymenoptera: Braconidae) against the moths Anagasta kuehniella Zeller and Plodia interpunctella (Hübner) (Lepidoptera: Pyralidae) was studied in the laboratory. The analysis was based on the comparison of parasitoid's life table parameters related to those of its hosts at various conditions of host density (daily supply o...

\ the Gomez scale (Table 1). r--Sen-and Sengupta "{Ronomic . 1 Political Weekly, vol. 18, Anr . Number 855-864, 1983) provide silT data on the nutritional status from \ villages of West .8engal (Table 2). r .-Oifferences are more markedmKl in spite of a better economic level i eating that boys have benefited f better income levels. The authors 0 study also point out that the exter discriminatio...

OBJECTIVES To explore various methods to quantify the burden of mortality, with a special interest for the more recent method at the core of calculations of disability adjusted life years (DALY). DESIGN Various methods calculating the age schedule at death are applied to two historical life table populations. One method calculates the "years of life lost", by multiplying the numbers of deaths...

demographic toxicology is a common method for investigation on the sub lethal effects of pesticides on natural enemies. the side effects of plant extracts from root of madder (rubia tinctorum l.), seeds of dill (aniethum graveolens l.) and seeds of galbanum (ferula gummosa boiss.) in comparision with thiamethoxam were evaluated on life table parameters of c. carnea as agonoscena pistaciae preda...

Understanding the variability of survival probabilities, both between and within cohorts, is important in order to understand life-cycle decisions under uncertainty. In this paper we analyze the subjective probabilities of survival to specific target ages provided by respondents to the Survey of Health, Ageing and Retirement in Europe (SHARE). To evaluate how these probabilities compare with ob...