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12 results for “Fitness recovery”
Prior choice and data requirements of Bayesian multivariate mixed effects models fit to tag-recovery data: The need for power analyses
<p>1. Recent empirical studies have quantified correlation between survival and recovery by estimating these parameters as correlated random effects with hierarchical Bayesian multivariate models fit to tag-recovery data. In these applications, increasingly negative correlation between survival and recovery has been interpreted as evidence for increasingly additive harvest mortality. The power of these hierarchal models to detect non-zero correlations has rarely been evaluated and these few studies have not focused on tag-recovery data, which is a common data type.</p> <p>2. We assessed the power of multivariate hierarchical models to detect negative correlation between annual survival and recovery. Using three priors for multivariate normal distributions, we fit hierarchical effects models to a mallard (<em>Anas</em> <em>platyrhychos</em>) tag-recovery dataset and to simulated data with sample sizes corresponding to different levels of monitoring intensity. We also demonstrate more robust summary statistics for tag-recovery datasets than total individuals tagged.</p> <p>3. Different priors lead to substantially different estimates of correlation from the mallard data. Our power analysis of simulated data indicated most prior distribution and sample size combinations could not estimate strongly negative correlation with useful precision or accuracy. Many correlation estimates spanned the available parameter space (–1,1) and underestimated the magnitude of negative correlation. Only one prior combined with our most intensive monitoring scenario provided reliable results. Underestimating the magnitude of correlation coincided with overestimating the variability of annual survival, but not annual recovery.</p> <p>4. The inadequacy of prior distributions and sample size combinations previously assumed adequate for obtaining robust inference from tag-recovery data represents a concern in the application of Bayesian hierarchical models to tag-recovery data. Our analysis approach provides a means for examining prior influence and sample size on hierarchical models fit to capture-recapture data while emphasizing transferability of results between empirical and simulation studies.</p>
Prior choice and data requirements of Bayesian multivariate mixed effects models fit to tag-recovery data: The need for power analyses
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Recovery from heat-induced infertility: A study of reproductive tissue responses and fitness consequences in male Drosophila melanogaster
<p><span>The predicted temperature increase caused by climate change is a threat to biodiversity. Across animal taxa, male reproduction is often sensitive to elevated temperatures leading to fertility loss and in more adverse scenarios, this can result in sterility when males reach their upper thermal fertility limit. Here we investigate temperature-induced changes in reproductive tissues, fertility reduction, sterility, and the associated fitness loss during the subsequent recovery phase in male <em>Drosophila melanogaster</em>. We heat-stressed males during development and either allowed them to recover or not in early adulthood, while measuring several determinants of male reproductive success. We found significant differences in recovery rate, organ sizes, sperm production, and other key reproductive traits among males from our different temperature treatments.</span> <span>Sperm maturation was impaired before reaching the upper thermal sterility threshold. While some effects were reversible, this did not compensate for the fitness loss due to damage imposed during development. Surprisingly, developmental heat stress was damaging to accessory gland growth, and female post-mating responses mediated by seminal fluid proteins were impaired regardless of the possibility of recovery. </span><span>We suggest </span><span>that sub-lethal thermal sterility and the subsequent fertility reduction is caused by a combination of inefficient functionality of both the accessory gland and testes. </span></p>
Recovery from heat-induced infertility: A study of reproductive tissue responses and fitness consequences in male Drosophila melanogaster
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Data from: Genetic rescue increases fitness and aids rapid recovery of an endangered marsupial population
Genetic rescue has now been attempted in several threatened species, but the contribution of genetics per se to any increase in population health can be hard to identify. Rescue is expected to be particularly useful when individuals are introduced into small isolated populations with low levels of genetic variation. Here we consider such a situation by documenting genetic rescue in the mountain pygmy possum, Burramys parvus. Rapid population recovery occurred in the target population after the introduction of a small number of males from a large genetically diverged population. Initial hybrid fitness was more than two-fold higher than non-hybrids; hybrid animals had a larger body size, and female hybrids produced more pouch young and lived longer. Genetic rescue likely contributed to the largest population size ever being recorded at this site. These data point to genetic rescue as being a potentially useful option for the recovery of small threatened populations.
Effect of Physical Therapy Exercises on Cardiorespiratory Fitness Level in COVID19 Patients After Recovery.
ClinicalTrials.gov study NCT04445376. IPD Sharing: NO. Countries: 1. Publications: 2.
Go Fit Fast, Recovery Trajectory Using PROMIS®, Linking PROMIS®
ClinicalTrials.gov study NCT04113044. IPD Sharing: NO. Countries: 6. Publications: 0.
Partnering Physical and Emotional Fitness: Improving Cardiac Recovery With Training in Emotion Regulation
ClinicalTrials.gov study NCT03303703. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Data from: Genetic rescue increases fitness and aids rapid recovery of an endangered marsupial population
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Changes in Fitness and Strength in Postoperative Cardiac Patients Undergoing Exercise Therapy: Biological and Functional Mechanisms of Recovery
ClinicalTrials.gov study NCT04903691. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
Correlation Between Physical Fitness Status and Quality of Postoperative Recovery in Gynaecological ERAS Patients
ClinicalTrials.gov study NCT06704750. IPD Sharing: NO. Countries: 1. Publications: 0.
Dataset related to article "Enhanced Recovery After Pancreatic Surgery Does One Size Really Fit All? A Clinical Score to Predict the Failure of an Enhanced Recovery Protocol After Pancreaticoduodenectomy"
<p>This record contains data related to article “Enhanced Recovery After Pancreatic Surgery Does One Size Really Fit All? A Clinical Score to Predict the Failure of an Enhanced Recovery Protocol After Pancreaticoduodenectomy”.</p>
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