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ShareScore release 0.9.0
Dataset results
39 results for “density rating”
The influence of wet feed distribution on the density, growth rate and growth variability of Tenebrio molitor
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Vitamin D and Its Affect on Growth Rates and Bone Mineral Density Until Age 5
ClinicalTrials.gov study NCT01419821. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Combined Effects of Energy Density and Eating Rate on Appetite
ClinicalTrials.gov study NCT01406886. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Data from: Negative relationships between population density and metabolic rates are not general
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Density dependence only affects increase rates in baleen whale populations at high abundance levels
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Data from: Replicated high-density genetic maps of two great tit populations reveal fine-scale genomic departures from sex-equal recombination rates
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Data from: Relative density and dispersion pattern of two southern African Asteraceae affect fecundity through heterospecific interference and mate availability, not pollinator visitation rate
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Data from: A high-density linkage map enables a second-generation collared flycatcher genome assembly and reveals the patterns of avian recombination rate variation and chromosomal evolution
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Data from: Evolutionary tracking is determined by differential selection on demographic rates and density dependence.
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Data from: Density-dependent space use affects interpretation of camera trap detection rates
<p>Camera-traps (CTs) are an increasingly popular tool for wildlife survey and monitoring. Estimating relative abundance in unmarked species is often done using detection rate as an index of relative abundance, which assumes a positive linear relationship with true abundance. This assumption may be violated if movement behavior varies with density, but the degree to which movement is density-dependent across taxa is unclear. The potential confounding of population-level relative abundance indices by movement depends on how regularly, and by what magnitude, movement rate and home-range size vary with density. We conducted a systematic review and meta-analysis to quantify relationships between movement rate, home range size, and density, across terrestrial mammalian taxa. We then simulated animal movements and CT sampling to test the effect of contrasting movement scenarios on CT detection rates. Overall, movement rate and home range size were negatively correlated with density and positively correlated with one another. The strength of the relationships varied significantly between taxa and populations. In simulations, detection rates were related to true abundance but underestimated change, particularly for slower moving species with small home ranges. In situations where animal space use changes markedly with density, we estimate that up to thirty percent of a true change in abundance may be missed due to the confounding effect of movement, making trend estimation more difficult. The common assumption that movement remains constant across densities is therefore violated across a wide range of mammal species. When studying unmarked species using CT detection rates, researchers and managers should consider that such indices of relative abundance reflect both density and movement. Practitioners interpreting changes in detection rates should be aware that observed differences may be biased low relative to true changes in abundance, and that further information on animal movement may be required to make robust inferences on population trends.</p>
Data for: Density dependence and spatial heterogeneity limit the population growth rate of invasive pines at the landscape scale
<p class="MsoBodyText"><span><span><span><span><span><span><span><span><span><span><span>Determining population growth across large scales is difficult because it is often impractical to collect data at large scales and over long timespans. Instead, the growth of a population is often only measured at a small, plot-level scale and then extrapolated to derive a mean field estimate. However, this approach is prone to error since it simplifies spatial processes such as the neighbourhood effects of density and dispersal. We present a novel approach that estimates how spatial processes derived from the effects of density and dispersal affect population growth between plot scales and landscape scales. The method is based on a scale transition theory and calculates a transition term to measure the spatial scaling of population growth, which we extend to unstable, expanding populations in order to assess whether landscape-scale population dynamics are different from those estimated at smaller spatial scales. We illustrate this approach using aerial imagery of eight locations in New Zealand experiencing non-native pine invasions. Analyses examined the dynamics at a plot scale (1 hectare) and compared this to estimates across entire landscapes (between 24 and 1600 hectares), in several cases for more than one time period. We used a Bayesian spatial random effects model to examine population growth and to account for neighbourhood effects and dispersal between plots in a rapidly changing system. </span></span></span></span></span></span></span></span></span></span></span></p> <p class="MsoBodyText"><span><span><span><span><span><span><span><span><span><span><span>We found that the estimates of the scale transition term were typically 10-25% of the mean field estimates, which led to mean field estimates of population growth extrapolated from plots being considerably higher than landscape estimates. The approach we have developed will not only have applications for predicting the populations' growth of invasive species, but also for studies examining the scaling of landscape-scale phenomena.</span></span></span></span></span></span></span></span></span></span></span></p>
Figure 4 in Parasitism rate of Plutella xylostella (Lepidoptera: Plutellidae) larvae in greenhouse by Tetrastichus howardi (Hymenoptera: Eulophidae) females at different densities
Figure 4. Sex ratio (number of females/(number of females + number of males)) of Tetrastichus howardi (Hymenoptera: Eulophidae) with different numbers of females per pupa of Plutella xylostella.
Figure 1 in Parasitism rate of Plutella xylostella (Lepidoptera: Plutellidae) larvae in greenhouse by Tetrastichus howardi (Hymenoptera: Eulophidae) females at different densities
Figure 1. Parasitism percentage of fourth instar Plutella xylostella (Lepidoptera: Plutellidae) caterpillars by Tetrastichus howardi (Hymenoptera: Eulophidae) females at different densities in semi-field conditions.
Data from: Density-dependent space use affects interpretation of camera trap detection rates
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Data for: Density dependence and spatial heterogeneity limit the population growth rate of invasive pines at the landscape scale
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Comparison of Detection Rates Between Two Commonly Used Bone Density Measurement Methods
ClinicalTrials.gov study NCT06299865. IPD Sharing: NO. Countries: 1. Publications: 0.
Microfluidic Chip vs Density Gradient Centrifugation on the Euploidy Rate of Pre-implantation Genetic Testing
ClinicalTrials.gov study NCT06023472. IPD Sharing: YES. Countries: 1. Publications: 0.
Phase 4, Double-blind Study Evaluating the Response on Computed Tomography (CT) Lung Density Decline Rates of Respreeza / Zemaira Weekly for 3 Years in Adults With alpha1 Antitrypsin Deficiency (AATD)
ClinicalTrials.gov study NCT07326592. IPD Sharing: YES. Countries: 0. Publications: 0.
Endogenous overexpression of Poplar MYB186 increases trichome density, improves growth rate and insect pest resistance
GEO Series GSE21061. Populus sp.; Populus tremula x Populus alba. 6 samples. Type: Expression profiling by array.
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OpenNeuro
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