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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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Related in: MedlinePlus

Frequency distribution of pseudo-values estimated by the jackknife technique and sample means estimated by the bootstrap technique (10,000 bootstraps) of the net consumption rate and the net reproductive rate of Helicoverpa armigera. High quality figures are available online.
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f08_01: Frequency distribution of pseudo-values estimated by the jackknife technique and sample means estimated by the bootstrap technique (10,000 bootstraps) of the net consumption rate and the net reproductive rate of Helicoverpa armigera. High quality figures are available online.

Mentions: The means and standard errors of r, λ, R0, GRR, and T estimated by using the jackknife method and bootstrap method are listed and compared in Table 4. Except R0 in jackknife estimation, all population parameters of H. armigera reared on asparagus and reared on hybrid sweet com were significantly different. In both estimations, the intrinsic rate (r) and the finite rate (λ) of H. armigera reared on asparagus were significantly lower than those reared on hybrid sweet corn. However, T and GRR for H. armigera reared on asparagus were significantly higher. When only the means and standard errors were concerned, there were only minor differences between the results estimated by these two techniques; however, the frequency distribution of estimated means (pseudo values) by the jackknife technique failed the normality test, while the frequency distribution of sample means of 10,000 bootstraps fitted the normal distribution well (Figure 8). Moreover, the significant difference in R0 of H. armigera reared on asparagus and hybrid sweet corn were not detected by using jackknife techniques (Table 2).


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)

Frequency distribution of pseudo-values estimated by the jackknife technique and sample means estimated by the bootstrap technique (10,000 bootstraps) of the net consumption rate and the net reproductive rate of Helicoverpa armigera. High quality figures are available online.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f08_01: Frequency distribution of pseudo-values estimated by the jackknife technique and sample means estimated by the bootstrap technique (10,000 bootstraps) of the net consumption rate and the net reproductive rate of Helicoverpa armigera. High quality figures are available online.
Mentions: The means and standard errors of r, λ, R0, GRR, and T estimated by using the jackknife method and bootstrap method are listed and compared in Table 4. Except R0 in jackknife estimation, all population parameters of H. armigera reared on asparagus and reared on hybrid sweet com were significantly different. In both estimations, the intrinsic rate (r) and the finite rate (λ) of H. armigera reared on asparagus were significantly lower than those reared on hybrid sweet corn. However, T and GRR for H. armigera reared on asparagus were significantly higher. When only the means and standard errors were concerned, there were only minor differences between the results estimated by these two techniques; however, the frequency distribution of estimated means (pseudo values) by the jackknife technique failed the normality test, while the frequency distribution of sample means of 10,000 bootstraps fitted the normal distribution well (Figure 8). Moreover, the significant difference in R0 of H. armigera reared on asparagus and hybrid sweet corn were not detected by using jackknife techniques (Table 2).

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