Repeated measures designs

Paine, Michael D.

doi:10.1002/etc.5620150901

Cited by 62 publications

(16 citation statements)

References 7 publications

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“…The daily number of flowers was subjected to repeated-measures ANOVA for each flower type (hermaphrodite and male flowers) for all the melon cultivars. The number of flowers produced per day was used as the replicate (within sample variation) to avoid problems of pseudoreplication in time (Paine, 1996;von Ende, 1993). The GLM procedure with the PROFILE statement was used for this analysis (SAS Institute, 2008).…”

Section: Statistical Analysesmentioning

confidence: 99%

Diversity and flower-visiting rates of bee species as potential pollinators of melon (Cucumis melo L.) in the Brazilian Cerrado

Tschoeke

Oliveira

Dalcin

et al. 2015

Scientia Horticulturae

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a b s t r a c tAlthough bees are important pollinators in many ecosystems worldwide, studies on bee diversity and their contribution to pollination of commercial plants in the Brazilian Cerrado (savannah-like biome) are scarce. The Cerrado biome covers approximately 23% of Brazil and is one of the world's most important agricultural frontiers. Here, we conducted field experiments in the Brazilian Cerrado to evaluate the diversity of bees, their foraging behaviors and flower visiting periods, and their potential contribution to the performance of six melon (Cucumis melo L.) cultivars. Five bee species (Apis mellifera, Halictus sp., Plebeia sp., Trigona pallens, and T. spinipes) were recorded visiting both male and hermaphrodite flower types of all C. melo cultivars. Whereas A. mellifera showed two peaks of flower visitation (an intense first one between 8:00 a.m. and 11:00 a.m. and a second less intense one after 4:00 p.m.), all other bee species visited the C. melo flowers only in the morning, with intensities and visitation peaks similar to those of A. mellifera. All of these bees collected nectar and pollen. Our results also indicated a moderate correlation between the intensity of bee visitation and fruit weight, demonstrating that all of these bees had the potential to pollinate C. melo and to influence its productivity. Except for the cultivar 'Hibrix', all the other cultivars showed economic feasibility and produced fruits of marketable sizes, with an estimated yield (over 25 tons/ha) in the range registered in other Brazilian regions.

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Section: Statistical Analysesmentioning

confidence: 99%

Diversity and flower-visiting rates of bee species as potential pollinators of melon (Cucumis melo L.) in the Brazilian Cerrado

Tschoeke

Oliveira

Dalcin

et al. 2015

Scientia Horticulturae

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“…Log transformations were performed on the plasma cortisol, lactate, and glucose data as well as the data for gill Cu and Zn concentrations, hepatic MT and hepatic Cu and Zn concentrations (Neter et al, 1990). Since replicates (tanks) were being resampled over the course of this study, repeated measures analyses were run on each parameter using a contrast and sum response design (Neter et al, 1990;Paine, 1996). A significant concentration term indicated that a parameter was consistently altered over the course of the exposure period due to metal concentration.…”

Section: Statistical Analysesmentioning

confidence: 99%

“…exposure to Cu. Significant interaction terms were analyzed by contrasts among times followed by one-way ANOVAs and Dunnett's test (Paine, 1996). Significant increases or decreases in responses elicited by metal exposures between time points were identified by significant results in tests of contrasts on the time points.…”

Section: Statistical Analysesmentioning

confidence: 99%

Alterations in Physiological Parameters of Rainbow Trout (Oncorhynchus mykiss) with Exposure to Copper and Copper/Zinc Mixtures

Dethloff

Schlenk

Hamm

et al. 1999

Ecotoxicology and Environmental Safety

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“…Log-transformations were performed on the plasma cortisol, lactate, and glucose data and on the data for hepatic metallothionein mRNA and copper concentrations (Neter et al 1990). Since replicates (tanks) were resampled, repeated measures analyses were run on each parameter using a contrast and sum response design (Neter et al 1990;Paine 1996). Because mortality depleted a tank before the final sampling date or there was insufficient tissue sampled on a specific date, data from certain tanks were not available at each sampling time.…”

Section: Statistical Analysesmentioning

confidence: 99%

“…If the repeated measures analysis resulted in a significant concentration term (p Յ 0.05), follow-up one-way ANOVAs in conjunction with Dunnett's test were used to distinguish fish responses in the copper concentrations that differed from fish responses in the control over the course of the exposure period (Dunnett 1955;Neter et al 1990). Significant interaction terms (concentration ϫ time) were analyzed by one-way ANOVAs and Dunnett's test performed on contrasts among times (Paine 1996). Results of these tests identified transient responses elicited in copper treatments that differed from the control response.…”

Section: Statistical Analysesmentioning

confidence: 99%

The Effects of Copper on Blood and Biochemical Parameters of Rainbow Trout (Oncorhynchus mykiss)

Dethloff¹,

Schlenk²,

Khan³

et al. 1999

Arch. Environ. Contam. Toxicol.

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Metals are released into aquatic systems from many sources, often at sublethal concentrations. The effects of sublethal concentrations of metals on fish are not entirely understood. The objective of this study was to determine the hematological and biochemical effects of a range of copper concentrations (6.4, 16.0, 26.9 microg Cu/L) on rainbow trout (Oncorhynchus mykiss) over a prolonged period of time. Trout were exposed to copper, and, at intervals of 3, 7, 14, and 21 days, selected parameters were evaluated. Hemoglobin, hematocrit, plasma glucose, and plasma cortisol levels were elevated in trout exposed to 26.9 microg Cu/L at day 3 and then returned to levels comparable to control fish. Plasma protein and lactate levels were not significantly altered in trout from any copper treatment. Hepatic copper concentration and hepatic metallothionein mRNA expression were consistently elevated in trout exposed to 26.9 microg Cu/L. Both of these parameters stabilized by day 3, with only hepatic copper concentration showing a further increase at day 21. Hepatic copper concentration and hepatic metallothionein mRNA expression appear to be robust indicators of copper exposure. Most blood-based parameters evaluated appear to be associated with a transitory, nonspecific stress response. The return of elevated hematological and biochemical parameters to control levels after 3 days and the stabilization of hepatic metallothionein mRNA expression and copper concentration over a similar time period suggested acclimation to dissolved copper at 26.9 microg/L. Further analysis of the data on blood-based parameters indicated that certain parameters (hemoglobin, hematocrit, plasma glucose, plasma cortisol) may be useful in field monitoring.

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Repeated measures designs

Cited by 62 publications

References 7 publications

Diversity and flower-visiting rates of bee species as potential pollinators of melon (Cucumis melo L.) in the Brazilian Cerrado

Diversity and flower-visiting rates of bee species as potential pollinators of melon (Cucumis melo L.) in the Brazilian Cerrado

Alterations in Physiological Parameters of Rainbow Trout (Oncorhynchus mykiss) with Exposure to Copper and Copper/Zinc Mixtures

The Effects of Copper on Blood and Biochemical Parameters of Rainbow Trout (Oncorhynchus mykiss)

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