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22 results for “colony survival”
Experimental treatments and survival of transplanted harvester ant colonies
<p>In sessile organisms such as plants and benthic invertebrates, founding propagules typically suffer extremely high rates of mortality due to both extrinsic and intrinsic factors. Many social insect species share similarities with these groups, but factors influencing early colony survival are relatively unstudied. </p> <p>We used a field experiment to measure the importance of environmental quality relative to intrinsic colony properties in the harvester ant, Pogonomyrmex occidentalis, by monitoring the survival of 584 experimental colonies. Colony survival was primarily determined by intrinsic factors. Multiple mating by the queen and larger colony size at the time of transplant increased survival, but queen size, maternal lineage and the composition of plant species in the vicinity of the colony did not. Food supplementation increased survival significantly when natural food was scarce, but was not consistently beneficial, in contrast to predictions. </p> <p>Our results emphasize the general importance of rapid growth and early attainment of large size in the survival of sessile species. However, attributes specific to ants, their sociality and mating system, also strongly affected survival. Colonies with multiply-mated queens were more likely to survive over a wide range of circumstances, highlighting the importance of this trait even at the early stages of colony life.</p> <p>These are data to support the paper "The benefits of being big and diverse: early colony survival in harvester ants." The data are the experimental traits of the colonies used for transplantation (size and lineage of the queen, size of the colony, mating status, food treatment, local vegetation), the characteristics of the transplant itself (year of transplant and the transplant set) as well as the experimental results (the duration of survival and whether the colony survived until the end of the experiment).</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>
Wolbachia-infected pharaoh ant colonies have higher egg production, metabolic rate, and worker survival
<p><span><em>Wolbachia</em> is a widespread endosymbiotic bacteria with diverse phenotypic effects on its insect hosts, ranging from parasitic to mutualistic. <em>Wolbachia</em> also commonly infects social insects, where it faces unique challenges associated with its hosts' caste-based reproductive division of labor and colony living. Here we dissect the benefits and costs of <em>Wolbachia</em> infection on life-history traits of the invasive pharaoh ant, <em>Monomorium</em> <em>pharaonis</em>. Pharaoh ants are relatively short-lived and show natural variation in <em>Wolbachia</em> infection between colonies, thereby making them an ideal model system for this study. We quantified effects on the lifespan of queen and worker castes, the egg-laying rate of queens across queen lifespan, and the metabolic rates of whole colonies and colony members. Newly-infected queens laid more eggs than uninfected queens but had similar metabolic rates and lifespans. Surprisingly, infected workers outlived uninfected workers. At the colony level, infected colonies were more productive due to increased queen egg-laying rates and worker longevity, and infected colonies had higher metabolic rates during peak colony productivity. While some effects of infection, such as elevated colony-level metabolic rates may be detrimental in more stressful natural conditions, we did not find any costs of infection under relatively benign laboratory conditions. Overall, our study emphasizes the beneficial effects of <em>Wolbachia</em> on colony-level growth and metabolism in this species.</span></p>
Wolbachia-infected pharaoh ant colonies have higher egg production, metabolic rate, and worker survival
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Summer but not spring resource supplementation improves bumblebee colony survival
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Data from: Parasite prevalence in a social host has colony-wide impacts on transcriptional activity and survival
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Experimental treatments and survival of transplanted harvester ant colonies
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Data from: Agroecological measures in meadows promote honey bee colony development and winter survival
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Data from: Floral diversity enhances winter survival of honey bee colonies across climatic regions
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Data from: Survival and recruitment dynamics of black-legged kittiwakes Rissa Tridactyla at an Alaskan colony
Most seabirds breed colonially and exhibit considerable site fidelity over the course of their long lifespans. Initial colony selection can therefore have substantial fitness consequences, but factors contributing to recruitment into colonies and subsequent fidelity remain unclear. We used multi-state capture-recapture models to test several hypotheses related to apparent fledgling survival, probability of recruitment to natal colonies, and apparent post-recruitment survival in Black-legged Kittiwakes Rissa tridactyla, using data from individuals banded as chicks and subsequently resighted at a colony in south-central Alaska over a 20-year period. Competitive models suggested that apparent fledgling survival declined throughout our study. This decline was likely driven by intrinsic, cohort-specific processes and was not explainable by post-fledging weather or climate conditions. Independent resightings at other colonies suggest the apparent decline may have been at least partially influenced by permanent emigration (natal dispersal), which occurred more frequently when the colony size was large. Recruitment was primarily age-dependent, with no detectable effects from early life experience or from annual changes in four factors: colony size, colony productivity, climate, or average weather conditions. We estimated an average recruitment age of seven years, which is older than typically reported for Atlantic kittiwake populations and which supports a more conservative life history strategy for kittiwakes in the Pacific. Variation in the apparent survival of recruits was cohort-specific and did not correlate with age or annual changes in the factors listed above. Instead, apparent survival of recruits was best explained by colony size during a cohort's second year, suggesting a degree of negative density dependence in post-recruitment survival or fidelity. This information could prove useful to managers deciding how to allocate resources among small, growing colonies and large, well-established colonies.
Data from: Drivers of spatiotemporal variation in survival in a flyway population: a multi-colony study
<p>1. Spatio-temporal variation in population dynamics of migratory populations is shaped by exposure to different environments during the annual cycle. Hence, exposure to similar environments should translate into synchrony in vital rates. Despite a wide-ranging breeding population, the Baltic/Wadden Sea flyway population of eiders (<i>Somateria m. mollissima</i>) shares wintering grounds in the southern Baltic Sea, inner Danish waters and the Wadden Sea; different colonies within this flyway population are therefore likely to exhibit some degree of synchrony in vital rates.</p> <p>2. Here we used capture-recapture-recovery data to investigate the impact of hunting, winter climate (the North-Atlantic Oscillation Index), winter temperature, nitrogen runoff, autumn-winter body condition of blue mussels <i>Mytilus </i>spp., natural predation and epidemic disease (avian cholera) on annual survival of adult females in ten study colonies distributed between the Netherlands and Finland. Moreover, we tested how the degree of similarity in spatial winter distributions affected the degree of similarity in annual survival among colonies.</p> <p>3. None of the covariates universally affected female survival. While the quality of blue mussels in the wintering area explained almost 40 % of the variation in survival of eiders breeding on Christiansø in the south-western Baltic Sea, incidence of epidemic disease explained > 60 % in two affected colonies. Furthermore, the spatial winter distribution did not appreciably influence annual survival rates in these ten colonies.</p> <p>4. The lack of universal effects of spatial winter distribution and winter conditions on survival suggests that local breeding conditions may be more important, and hence prime targets for conservation efforts. Better monitoring of e.g. food quality, predation pressure and epidemic disease at the time of breeding could be the key to better understand the population dynamics in this endangered flyway population.</p>
Impact of colony size on survival and sanitary strategies in fungus-infected ant colonies
<p>Data of the scientifc paper "Impact of colony size on survival and sanitary strategies in fungus-infected ant colonies"</p>
Data from: Drivers of spatiotemporal variation in survival in a flyway population: a multi-colony study
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Data from: Impacts of worker density in colony-level aggression, expansion, and survival of the acacia-ant Crematogaster mimosae
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Data from: Survival and recruitment dynamics of black-legged kittiwakes Rissa Tridactyla at an Alaskan colony
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Data from: Growth and survival of the superorganism: ant colony macronutrient intake and investment
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Data from: The carry-over effects of pollen shortage decrease the survival of honeybee colonies in farmlands
Many studies have reported honeybee colony losses in human-dominated landscapes. While bee floral food resources have been drastically reduced over past decades in human-dominated landscapes, no field study has yet been undertaken to determine whether there is a carry-over effect between seasonal disruption in floral resource availability and high colony losses. We investigated if a decline in the harvest of pollen by honeybees in spring affected managed honeybee colony dynamics (brood size, adult population and honey reserves) and health (Varroa mite loads and colony survival) throughout the beekeeping season. A decline in pollen harvest was associated with a direct reduction in brood production, leading to a negative effect on the adult population size later in the season, and lower honey reserves before the onset of winter. Furthermore, the decline in pollen harvest negatively impacted the health of the colony, resulting in higher Varroa mite loads and higher seasonal and winter colony losses. Early-warning signs of these carry-over effects were identified, showing that preferential investment in honey reserves instead of brood production early in the season increased the decline in pollen harvest and its associated carry-over effects. Synthesis and applications. The results suggest that the decline in pollen harvest may have been overlooked as a cause of pollen shortage and associated bee colony losses. Strategies to avoid such losses in intensive farmland systems include (i) limiting or avoiding honey harvests in spring, (ii) monitoring colonies for early-warning signals of colony failure and (iii) increasing the amount of floral resources available through wise land-use management.
Heterotrophy in parental coral colonies enhances larval survival independently of heat stress
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Data from: The carry-over effects of pollen shortage decrease the survival of honeybee colonies in farmlands
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Upregulated cholesterol biosynthesis facilitates the survival of methylation-retaining AML cells following decitabine treatment [single_colony_TEM-Seq]
GEO Series GSE256353. Homo sapiens. 1728 samples. Type: Expression profiling by high throughput sequencing; Methylation profiling by high throughput sequencing.
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
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