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19 results for “colony development”
Assessing the Impact of Pest Monitoring Traps on Bombus griseocollis (Hymenoptera: Apidae) Colony Growth and Development
<p>Insect traps use visual and olfactory cues to attract target pests; however, they vary in their specificity and often unintentionally capture non-target beneficial insects (bycatch), including <em>Bombus</em>. Concerns have been expressed that bycatch may contribute to <em>Bombus</em> mortality and the consequential loss of pollination services. Here, we quantified the impact of trap captures on <em>Bombus griseocollis</em> colony growth and development by evaluating the following four treatments: colonies paired with traps, colonies paired with traps and pheromone lures, traps and pheromone lures (but no colonies), and colonies with no trap and no lure. Trap contents were collected biweekly to determine <em>B. griseocollis </em>capture rates. Colony growth and development data were collected weekly by weighing colonies and recording foraging activity. Based on microsatellite polymerase chain reaction (PCR) amplification, three <em>B. griseocollis </em>were collected from released colonies, while the remaining five were residents within the environment. Given the low number of <em>B. griseocollis </em>workers collected, any differences in colony weight change and active foraging were likely not a result of pest monitoring trap captures. However, trap captures could have a greater impact by interfering with functional diversity, colony establishment, and pollination services, emphasizing the need for additional research. Building on this research will provide a more comprehensive view of the impact of pest monitoring traps on <em>Bombus </em>populations, which could minimize risk to pollinator populations and pollination services.</p>
Algal growth, bumblebee colony and individual development, bee behavior and yield of oilseed rape under a trophic cascade and extreme weather
<p><span>Trophic cascades in the aquatic environment constitute important mechanisms for improving water quality. However, how the presence or non-presence of these trophic cascades may affect interactions across the aquatic-terrestrial interface remains poorly investigated. Pollinators such as bees may be especially vulnerable to changes in water resource quality induced by trophic cascades. Understanding how aquatic trophic cascades affect bees and pollination becomes even more pressing under ongoing climate change due to increased physiological demands for water under extreme weather events.</span><span>In a novel field experiment combining terrestrial and aquatic mesocosms, we aimed to test how changes in water quality induced by an aquatic trophic cascade </span><span>affected foraging and growth of bumblebee colonies as well as foraging of solitary bees. While we expected fish predation to reduce top-down control of zooplankton on phytoplankton and thereby, indirectly, induce increased growth of toxic cyanobacteria</span><span>, we instead found the trophic cascade to induce the formation of algal surface mats that bumblebees used to access water under a severe heat wave and drought. This access to water was associated with higher bumblebee colony reproductive success, growth and weight compared to control colonies with no trophic cascade induced (and hence no algal surface mats). We also found marginal </span><span>but non-significant</span><span> effects on oilseed rape yield, but surprisingly with higher yields in the control treatment where bumblebees could not access water.</span><span>Our results provide new insights on how aquatic trophic cascades can lead to unpredicted ecological interactions across the aquatic-terrestrial interface facilitated by climate change. Our study highlights the importance of water for the fitness of terrestrial ecosystem service providers under altered environmental conditions.</span></p>
Data from: Agroecological measures in meadows promote honey bee colony development and winter survival
<p><span>The homogenization of agricultural landscapes has led to a decrease in pollinator diversity and abundance. In response to this decline, farmers have implemented agroecological measures, which, in meadows, aim at providing more floral resources. These measures are the availability of unmown floral strips, delayed mowing, and discouraging the use of the conditioner, a device known to harm insects. The aim of our study was to investigate the cascade of effects of these agroecological measures on honey bee colony development and winter survival. We (i) determined the effect of these measures on colony size during the nectar and pollen collecting season in spring and summer, (ii) evaluated the effect of spring and summer colony sizes on autumn size, and (iii) described the effect of colony size in autumn on winter mortality. In this study, 300 honey bee colonies were monitored over three years </span><span>in three cantons of Switzerland. Colony size was defined by the number of brood cells and adult workers, Honey bee colony size in summer and autumn were improved by agroecological measures on meadows and likely contributed to the increased overwintering success.</span> <span>This study is a first step towards the targeted identification of viable agroecological measures on temporary meadows that can be implemented to promote honey bee colonies' health in the agricultural landscape.</span></p>
Algal growth, bumblebee colony and individual development, bee behavior and yield of oilseed rape under a trophic cascade and extreme weather
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Data from: Agroecological measures in meadows promote honey bee colony development and winter survival
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Development of a test design for a semi-field, colony feeding study for the common eastern bumble bee (Bombus impatiens [Hymenoptera:Apidae])
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Replication Package for: "Pre-Colonial Warfare and Long-Run Development in India"
<p>Data and code to replicate all the results in the article Dincecco, Mark; Fenske, James; Menon, Anil; and Mukherjee, Shivaji "Pre-Colonial Warfare and Long-Run Development in India," Economic Journal.</p>
Development of microsatellite markers for colony delineation of the invasive Asian subterranean termite in South Florida and Taiwan
<p>Delineating the colony identity of <em>Coptotermes gestroi </em>(Wasmann) is a core issue of colony elimination in the implementation of subterranean termite baiting systems. Invasion history is believed the possible cause of genetic variabilities among colonies. Haplotype network analysis of mitochondrial cytochrome <em>c</em> oxidase subunit II revealed the multiple origins of American <em>C</em>.<em> gestroi</em> from<em> </em>the Philippines and Southeast Asia and the Taiwan population only from the Philippines. We further developed 21 new microsatellite markers for the comparison of genetic variabilities on colony delineation of <em>C</em>.<em> gestroi </em>colonies from South Florida (invaded ~30 years; 3–7 generations) and Taiwan (~110 years; 13–27 generations). The present microsatellite markers with 1–4 alleles per locus have validated the effectiveness of colony delineation for three incipient colonies reared in the laboratory and three field colonies from Taiwan. Genetic admixture of the Floridian <em>C</em>. <em>gestroi</em> probably caused by recent invasion history, multiple invasions, and anthropogenic activities among regions. A possible introduction event likely occurred through human-mediated activities between Fort Lauderdale and Miami. Overall, these new microsatellite markers provide suitable and efficient candidate genetic markers for colony delineation of <em>C</em>. <em>gestroi</em> to consolidate the effectiveness of the colony elimination system in termite management.</p>
A comment on Dincecco et al. (2022): Pre-colonial warfare and long-run development in India
<p>We test the reproducibility and replicability of Dincecco et al. (2022),<br> which reports a positive relationship between pre-colonial interstate warfare<br> and long-run development patterns across India. Overall, we confirm that all<br> of the study’s estimates are computationally reproducible using the provided<br> replication package in Stata, but note that the ease of replication could be<br> improved by the provision of code and intermediate datasets for the conflict<br> exposure measure. We test for and find no evidence of data manipulation in<br> the final datasets. Concerning direct replicability, we consider different ways<br> of measuring distance to conflicts and also alternative proxies for both the<br> dependent variable and variables which capture channels by which the main<br> effects operate. We find that some estimates are sensitive to the type of con-<br> flict considered. Other estimates are sensitive to the time period considered,<br> most likely due to time heterogeneity in the number of conflicts recorded.<br> Nevertheless, most estimates are substantially in line with the original study</p>
Development of microsatellite markers for colony delineation of the invasive Asian subterranean termite in South Florida and Taiwan
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Influence of bacterial strains on oviposition and larval development of two BTV vector species of Culicoides (Diptera: Ceratopogonidae): an approach to colony establishment
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Data_Rcode for: American foulbrood in a honeybee colony: spore-symptom relationship and feedbacks between disease and colony development
<p>Original data and analysis (R code) for the publication</p> <p>Stephan JG, De Miranda JR, Forsgren E. (2020). American foulbrood in a honeybee colony: spore-symptom relationship and feedbacks between disease and colony development. BMC Ecology.</p>
PROCEDURE FOR SENTENCE OF PRISONERS IN DEVELOPED COUNTRIES, PENAL COLONIES, PRISONS
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Effect of Colony Stimulating Factor on Poor Endometrial Development During IVF
ClinicalTrials.gov study NCT01202643. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Prolonged growth of a clinical S. aureus strain selects for a stable SCV and Full genomic characterization of the development in a clinical Staphylococcus aureus strain of a stable Small Colony Varian
GEO Series GSE63750. Staphylococcus aureus. 5 samples. Type: Expression profiling by high throughput sequencing; Other.
Data from: A large-scale field study examining effects of exposure to clothianidin seed-treated canola on honey bee colony health, development, and overwintering success
In summer 2012, we initiated a large-scale field experiment in southern Ontario, Canada, to determine whether exposure to clothianidin seed-treated canola (oil seed rape) has any adverse impacts on honey bees. Colonies were placed in clothianidin seed-treated or control canola fields during bloom, and thereafter were moved to an apiary with no surrounding crops grown from seeds treated with neonicotinoids. Colony weight gain, honey production, pest incidence, bee mortality, number of adults, and amount of sealed brood were assessed in each colony throughout summer and autumn. Samples of honey, beeswax, pollen, and nectar were regularly collected, and samples were analyzed for clothianidin residues. Several of these endpoints were also measured in spring 2013. Overall, colonies were vigorous during and after the exposure period, and we found no effects of exposure to clothianidin seed-treated canola on any endpoint measures. Bees foraged heavily on the test fields during peak bloom and residue analysis indicated that honey bees were exposed to low levels (0.5–2 ppb) of clothianidin in pollen. Low levels of clothianidin were detected in a few pollen samples collected toward the end of the bloom from control hives, illustrating the difficulty of conducting a perfectly controlled field study with free-ranging honey bees in agricultural landscapes. Overwintering success did not differ significantly between treatment and control hives, and was similar to overwintering colony loss rates reported for the winter of 2012–2013 for beekeepers in Ontario and Canada. Our results suggest that exposure to canola grown from seed treated with clothianidin poses low risk to honey bees.
Data from: A large-scale field study examining effects of exposure to clothianidin seed-treated canola on honey bee colony health, development, and overwintering success
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Spatiotemporal Patterns of Gene Expression During Development of a Complex Colony Morphology
GEO Series GSE274952. Saccharomyces cerevisiae. 36 samples. Type: Expression profiling by high throughput sequencing.
Hypoxia Inducible Factor 2α promotes tolerogenic macrophage development during cardiac transplantation through transcriptional regulation of colony stimulating factor 1 receptor
GEO Series GSE262851. Mus musculus. 2 samples. Type: Expression profiling by high throughput sequencing.
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International Brain Laboratory public data
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OpenNeuro
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