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Life table and consumption capacity of corn earworm, Helicoverpa armigera, fed asparagus, Asparagus officinalis.

Jha RK, Tuan SJ, Chi H, Tang LC - J. Insect Sci. (2014)

Bottom Line: The uncertainty associated with life table parameters was estimated by using jackknife and bootstrap techniques, and the results were compared for statistical inference.The frequency distribution of sample means obtained by the jackknife technique failed the normality test, while the bootstrap results fit the normal distribution well.By contrast, the relationship between the mean fecundity and the net reproductive rate, as estimated by the bootstrap technique, was slightly inconsistent with the relationship found by mathematical proof.

View Article: PubMed Central - PubMed

Affiliation: Department of Entomology, National Chung Hsing University, Taichung 402, Taiwan, Republic of China Plant Protection Directorate, Department of Agriculture, Hariharbhawan, Lalitpur, Nepal jharatna@gmail.com.

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Age-stage-specific survival rate (sxj) of Helicoverpa armigera reared on asparagus. High quality figures are available online.
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f02_01: Age-stage-specific survival rate (sxj) of Helicoverpa armigera reared on asparagus. High quality figures are available online.

Mentions: The age-stage, two-sex life table revealed the overlap of the age-stage-specific survivorship (sxj) curve of the cohort of H. armigera reared on asparagus (Figure 2). This curve shows the probability that a fertile egg of H. armigera will survive to age x and stage j. This sxj curve can be simplified to the age-specific survival rate (lx) curve (Figure 3) by ignoring the stage differentiation; the curve can then be calculated using Equation 4, including all individuals in the cohort. The female age-specific fecundity (fx10) (the female in the 10th life stage), the age-specific fecundity (mx), the age-specific maternity (lxmx), and the cumulative reproductive rate


Life table and consumption capacity of corn earworm, Helicoverpa armigera, fed asparagus, Asparagus officinalis.

Jha RK, Tuan SJ, Chi H, Tang LC - J. Insect Sci. (2014)

Age-stage-specific survival rate (sxj) of Helicoverpa armigera reared on asparagus. High quality figures are available online.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4206235&req=5

f02_01: Age-stage-specific survival rate (sxj) of Helicoverpa armigera reared on asparagus. High quality figures are available online.
Mentions: The age-stage, two-sex life table revealed the overlap of the age-stage-specific survivorship (sxj) curve of the cohort of H. armigera reared on asparagus (Figure 2). This curve shows the probability that a fertile egg of H. armigera will survive to age x and stage j. This sxj curve can be simplified to the age-specific survival rate (lx) curve (Figure 3) by ignoring the stage differentiation; the curve can then be calculated using Equation 4, including all individuals in the cohort. The female age-specific fecundity (fx10) (the female in the 10th life stage), the age-specific fecundity (mx), the age-specific maternity (lxmx), and the cumulative reproductive rate

Bottom Line: The uncertainty associated with life table parameters was estimated by using jackknife and bootstrap techniques, and the results were compared for statistical inference.The frequency distribution of sample means obtained by the jackknife technique failed the normality test, while the bootstrap results fit the normal distribution well.By contrast, the relationship between the mean fecundity and the net reproductive rate, as estimated by the bootstrap technique, was slightly inconsistent with the relationship found by mathematical proof.

View Article: PubMed Central - PubMed

Affiliation: Department of Entomology, National Chung Hsing University, Taichung 402, Taiwan, Republic of China Plant Protection Directorate, Department of Agriculture, Hariharbhawan, Lalitpur, Nepal jharatna@gmail.com.

Show MeSH
Related in: MedlinePlus