Function of coprophagous beetles (Coleoptera: Scarabaeidae, Geotrupidae, Hydrophilidae) in cattle pastures inferred from pitfall trapping data

2010 ◽  
Vol 27 (2) ◽  
pp. 85-91 ◽  
Author(s):  
Martin Šlachta ◽  
Jan Frelich ◽  
Tomáš Tonka
Keyword(s):  
Seasonal Variation ◽  
Spatial Variation ◽  
Dry Weight ◽  
Seasonal Distribution ◽  
The Other ◽  
Pitfall Trapping ◽  
Other Hand ◽  
Nested Anova ◽  
Species Groups ◽  
Dung Decomposition

Function of coprophagous beetles (Coleoptera: Scarabaeidae, Geotrupidae, Hydrophilidae) in cattle pastures inferred from pitfall trapping dataAn analysis of data on the dry weight biomass of coprophagous beetles in standardized dung (4.5 l) was conducted in order to characterize the spatial and the seasonal distribution of the beetles' biomass in cattle pastures and to elucidate their function in dung decomposition. Nested Anova with factors of farm, site (nested in farm), seasonal period and year was used to evaluate the effect of these factors on the biomass of four functional species groups: the dung dwellers ofScarabaeidae(subfamilyAphodiinae), the dung dwellers ofHydrophilidae, the small tunnellers ofScarabaeidae(subfamilyCoprinae) and the large tunnellers ofGeotrupidae. The spatial variation of biomass (between the sites and the farms) was insignificant (P>0.05) in the two dung-dweller groups and in the large-tunnellers group. On the other hand, a significant (P<0.05) seasonal variation of biomass was found in all but the large tunneller group. In dung dwellers, the spring biomass was formed mainly by two species,Aphodius prodromusandA. sphacelatus. In summer, most of the biomass was accounted for bySphaeridium lunatum, S. scarabaeoidesandA. rufipes. In the two tunneller groups,Onthophagus fracticornis, Geotrupes stercorariusandG. spinigerformed a majority of the biomass in dung.

Parameter Analysis of Electromagnetic Braking Using Fully Nested and Two Way ANOVA

2014 ◽  
Vol 663 ◽  
pp. 193-197 ◽  
Author(s):  
Mohamad Zairi Baharom ◽  
M.Z. Nuawi ◽  
Gigih Priyandoko
Keyword(s):  
Statistical Analysis ◽  
Eddy Current ◽  
Parametric Study ◽  
Air Gap ◽  
Parameter Analysis ◽  
Braking Performance ◽  
Braking System ◽  
Study Results ◽  
Nested Anova ◽  
Significant Factors

This paper presents the statistical analysis that was used to define optimized parameter for the electromagnetic braking using eddy current study. It illustrates parametric study on four different parameters affecting the braking performance using eddy current which are air-gap, number of electromagnet turns, current induced and disc thickness. These four parameters are defined as the factors which contribute to the reduction of RPM speed as the effect. Fully nested ANOVA was used as the first analysis to determine two most significant factors to eddy current braking system. Then, two-way ANOVA was applied to clarify the most significant factors to be used as the controllable parameters in the verification study. Results from both ANOVA test shows that current induced and air-gap are the two most significant factors that affected braking using eddy current.

Did a heavy storm affect the aperture area of wave-exposed and sheltered Littorina striata?

1999 ◽  
Vol 79 (6) ◽  
pp. 1129-1130 ◽  
Author(s):  
H. De Wolf ◽  
C. Brito ◽  
S. Van Dongen ◽  
T. Backeljau
Keyword(s):  
Temporal Variation ◽  
Storm Effects ◽  
Nested Anova ◽  
Before And After ◽  
Present Context ◽  
Storm Effect ◽  
Heavy Storm

During the winter of 1996, a heavy storm crossed the coasts of the Azores. A comparison of wave-exposed and wave-sheltered samples of the intertidal planktonic developing periwinkle Littorina striata (Mollusca: Caenogastropoda), collected before and after this storm revealed: (1) an overall difference in relative and absolute aperture area between wave-exposed and wave-sheltered samples; and (2) depending on the technique used a storm (MANOVA/CDA/1994 vs 1996 nested ANOVA) or no storm (1992, 1993, 1994, 1996, nested ANOVA) effect was noted. Preference should be given to the latter analysis as it is more correct in the present context. Nesting of the factor ‘year’ in the factor ‘storm’, allows detection of the true storm effect, disentangling it from other year exposure interactions, while the inclusion of more than one pre-storm sample allows differentiation of storm effects from ‘normal’ temporal variation.

Synergy ofl-arginine and growth hormone (GH)-releasing peptide-2 on GH release: influence of gender

2000 ◽  
Vol 279 (4) ◽  
pp. R1455-R1466 ◽  
Author(s):  
Laurie Wideman ◽  
Judy Y. Weltman ◽  
James T. Patrie ◽  
C. Y. Bowers ◽  
Niki Shah ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Young Adults ◽  
Stimulus Type ◽  
Follicular Phase ◽  
Analysis Of Covariance ◽  
Gh Secretion ◽  
Basal Serum ◽  
Nested Anova ◽  
Early Follicular Phase ◽  
Serum Gh

We test the hypotheses that 1) growth hormone (GH)-releasing peptide-2 (G) synergizes with l-arginine (A), a compound putatively achieving selective somatostatin withdrawal and 2) gender modulates this synergy on GH secretion. To these ends, 18 young healthy volunteers (9 men and 9 early follicular phase women) each received separate morning intravenous infusions of saline (S) or A (30 g over 30 min) or G (1 μg/kg) or both, in randomly assigned order. Blood was sampled at 10-min intervals for later chemiluminescence assay of serum GH concentrations. Analysis of covariance revealed that the preinjection (basal) serum GH concentrations significantly determined secretagogue responsiveness and that sex ( P = 0.02) and stimulus type ( P < 0.001) determined the slope of this relationship. Nested ANOVA applied to log-transformed measures of GH release showed that gender determines 1) basal rates of GH secretion, 2) the magnitude of the GH secretory response to A, 3) the rapidity of attaining the GH maximum, and 4) the magnitude or fold (but not absolute) elevation in GH secretion above preinjection basal, as driven by the combination of A and G. In contrast, the emergence of the G and A synergy is sex independent. We conclude that gender modulates key facets of basal and A/G-stimulated GH secretion in young adults.

The Spectrum of a Model II Nested ANOVA and Its Applications

Technometrics ◽  
1969 ◽  
Vol 11 (1) ◽  
pp. 91-102 ◽  
Author(s):  
William H. Lawton ◽  
J. Edward Jackson
Keyword(s):  
Nested Anova

Model diagnostics for detecting and identifying method repeatability outliers in precision studies: application to a homogeneity study under a two-stage nested ANOVA

2016 ◽  
Vol 31 (3) ◽  
pp. 686-699 ◽  
Author(s):  
Stephen J. Walsh ◽  
Zsuzsanna Macsik ◽  
Dariusz Wegrzynek ◽  
Thomas Krieger ◽  
Sergei Boulyga
Keyword(s):  
Statistical Model ◽  
Model Diagnostics ◽  
Homogeneity Study ◽  
Two Stage ◽  
Nested Anova ◽  
Iso 5725

In this paper we illustrate the use of statistical model diagnostics as an approach to identifying method repeatability outliers in precision experiments. We describe how this approach addresses the well-known shortcomings of Cochran’s test which is prescribed for this purpose in ISO 5725-2:1994.

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