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48 results for “colony growth”
Sea whip coral Leptogorgia virgulata in the Mid-Atlantic Bight: Colony complexity, age, and growth
<p>Datasets for the analyses described in the submitted publication: Sea whip coral <em>Leptogorgia virgulata </em>in the Mid-Atlantic Bight: Colony complexity, age, and growth. </p>
Growth and productivity of monogynous and polygynous colonies in the ant Myrmecina graminicola
<p>This is the dataset used in the article:</p> <p><span>Taupenot A., Doums D., Molet M. (2024) No major difference in growth and productivity between monogynous and polygynous colonies in the ant <em>Myrmecina graminicola</em>. <em>Insectes Sociaux</em></span><br>https://doi.org/10.1007/s00040-024-01004-y</p>
Data from: Urban heavy metal contamination limits bumble bee colony growth
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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: Limitation of complementary resources affects colony growth, foraging behavior and reproduction in bumble bees
<p>Resource availability has been disturbed for many organisms in agricultural landscapes including pollinator species. Abundance and diversity in flower availability benefit bee populations, however, little is known about which of protein or carbohydrate resources may limit their growth and reproductive performance. Here, we test the hypothesis of complementary resource limitation using a supplemental feeding approach. We applied this assumption with bumble bees (<i>Bombus terrestris</i>), assuming that colony growth and reproductive performance should depend on the continuous supply of carbohydrates and proteins, through the foraging for nectar and pollen respectively. We placed wild-caught bumble bee colonies along a landscape gradient of semi-natural habitats, and monitored the colonies' weight, foraging activity and reproductive performance during the whole colony cycle. We performed supplemental feeding as an indicator of landscape resource limitation, using a factorial design consisting of the addition of sugar-water (carbohydrate, supplemented or not) crossed by pollen (protein, supplemented or not). Bumble bee colony dynamics showed a clear seasonal pattern with a period of growth followed by a period of stagnation. Higher abundance of semi-natural habitats resulted in reducing the proportion of pollen foragers relative to all foragers in both periods, and in improving the reproductive performance of bumble bees. Interestingly, the supplemental feeding of sugar-water positively affected the colony weight during the stagnation period, while the supplemental feeding of pollen mitigated the landscape effect on pollen collection investment. Single and combined supplementation of sugar-water and pollen increased the positive effect of semi-natural habitats on reproductive performance. This study reveals a potential co-limitation in pollen and nectar resources affecting foraging behavior and reproductive performance in bumble bees, and indicates that even in mixed agricultural landscapes with higher proportions of semi-natural habitats, bumble bee populations face resource limitations. We conclude that the seasonal management of floral resources must be considered in conservation to support bumble bee populations and pollination services in farmlands.</p>
Data from: When does growth rate influence fitness in a colonial marine invertebrate?
<p>Growth rate affects body size, and larger body sizes are often associated with the capacity to produce more surviving offspring. However, the assumption that growth rate should positively relate to fitness is rarely tested, especially in colonial marine invertebrates where size and age can be decoupled. We measured growth, survival, and reproduction through repeated census of 97 colonies from two populations of a marine bryozoan in the field from settlement to the end of their reproductive season in the northern Gulf of Mexico. Despite large population differences in fitness when grown in a common garden setting, selection within populations on variation in relative growth rate prior to reproduction was similar. In both populations, colonies that grew faster early after settlement, hence were larger, did not consistently have higher fitness than colonies that grew slower after settlement. Instead, early juvenile growth was uncorrelated to later juvenile growth, and colonies that grew faster just prior to the onset of reproduction had higher fitness than colonies that grew slower during this time. Growth rates then declined with the onset of reproduction. Our results show that, rather than being a simple consequence of selection on body size, growth rate can directly affect variation in fitness in ways that are not directly attributable to juvenile size. Colony size and growth rate in modular animals are not always reliable surrogates for direct estimates of survival and reproduction, without identifying when and how growth affects fitness.</p>
Data from: Maize-dominated landscapes reduce bumble bee colony growth through pollen diversity loss
1. Bumble bees are important pollinators for a wide range of crops and wild plants. Performance of their colonies depends on pollen and nectar as food resources, but flowering plants are scarce in modern agricultural landscapes. It is well-known that semi-natural habitats can enhance floral resources and bumble bee abundance, but the impact of different crop types and their heterogeneity at the landscape scale remains unclear. 2. We tested the effect of two different crop types (oilseed rape (OSR) and maize) and of configurational (field border density) and compositional heterogeneity (crop diversity) on weight gain of buff-tailed bumble bee colonies (Bombus terrestris) colonies and the pollen diversity collected by them in 20 landscapes in Central Germany. 3. We found that augmenting maize cover had a detrimental effect on pollen diversity collected by the bumble bees, probably due to intensive management resulting in low plant diversity. This low pollen diversity translated into reduced colony growth, since colonies with high pollen diversity gained more weight than colonies with low pollen diversity. 4. In contrast, OSR cover, configurational and compositional heterogeneity did neither affect colony growth nor pollen diversity. However, for OSR the timing of the flowering period was important. When OSR fields had a high flower cover at the end of the OSR blooming period, colonies showed increased growth rates. 5. Synthesis and applications. Our results complement previous laboratory studies by showing that high pollen diversity leads to better colony performance under field conditions. Therefore, the maintenance of floral diversity in agricultural landscapes is crucial to ensure that bumble bees can fulfil their nutritional needs. However, the heterogeneity of crops, at least under the currently very low levels of crop rotation, does not contribute to this aim. In contrast, crop identity and timing of mass-flowering crops turned out to be important factors, as maize reduced pollen resources, while late blooming OSR oilseed rape was beneficial for bumble bee colonies. Hence, maize cover per landscape should be reduced and strategies to enhance landscape wide flower diversity, especially towards and after the end of oilseed rape bloom should be promoted to support bumble bee colonies that provide important pollination services.
Exposure to urban heavy metal contamination diminishes bumble bee colony growth
<p>As a result of their industrial past, legacy cites often have elevated concentrations of soil heavy metal contamination. Metal pollution can have negative and prolonged ecosystem impacts, and bees that forage in these urban ecosystems are at risk of exposure. Legacy cities are known to support species rich bee communities, which highlights the importance of determining the impact of heavy metal contamination on wild bee health. We examined how oral exposure to concentrations of four metals found within the provisions of bees foraging within Cleveland, Ohio, USA influenced colony growth of <em>Bombus impatiens</em> Cresson (Hymenoptera: Apidae), a common species within legacy cities across the eastern United States. Colony weight and brood survivorship were compared among hives fed uncontaminated sucrose solution (hereafter nectar), nectar spiked with one metal (arsenic, cadmium, chromium, or lead), and nectar containing all metals, after 15 or 30 d of exposure within flight tents. Across both exposure periods, we found a significantly higher proportion of dead brood in metal exposed hives. Additionally, colonies fed all four metals had a significantly higher proportion of dead brood than those fed a single metal. Our findings illustrate that even low, environmentally relevant concentrations of metals collected by B. impatiens in legacy cities can negatively influence bee colony growth. We highlight the need to identify metal exposure routes for bees in contaminated landscapes to minimize risk and bolster conservation habitat initiative success.</p>
FIGURES 2–7. Bryozoan colony growth forms. 2 in Diversity of marine bryozoans inhabiting demosponges in northeastern Brazil
FIGURES 2–7. Bryozoan colony growth forms. 2, encrusting patches; 3, encrusting spots; 4, erect articulated; 5, erect delicate branching; 6, erect fenestrate; 7, erect stoloniferan. Scale bars: 5 mm.
Images of colony growth for 224 Arabidopsis thaliana bacterial strains on 46 carbon sources
<p>This repository contains all data necessary to score colony growth on agar plates using the software tool 'platescan' (github.com/MicrobiologyETHZ/platescan) for the strains presented in Schäfer, Pacheco, et al.</p> <p>The growth of the 224 strains was split into 3 screens. Rounds 1, 2, and half of 3 comprised the core of the screen for all strains, and the second half of 3 comprised the validation set for computing the false discovery rate. The directories containing the images, as well as their corresponding metadata files, are named accordingly:</p> <p> pictures_7dps_screen_*: folders contain pictures of screening plates to assess growth on tested garbon sources. Pictures were taken 7 days after spotting strains on the plates.</p> <p> *_d7_filenames.txt: files link the picture filename to the carbon source that was tested. In addition the screening round and the plate number within the screening round is indicated.</p> <p> strain_metadata_screen*.txt: files indicate the position of the strains on the test plates [row (alphabetical), row (numbered), column (numbered)] and additional comments relevant for analysis (swarmer). Screen_nr and plate_number allow to link data to the corresponding pictures.</p> <p>This repository additionally includes a script to perform downstream processing of the platescan software output,</p> <p> plate_scan_analysis.R.</p> <p>and a file reporting the latescan output values that were manually overwritten due to contamination or poor image quality</p> <p> manual_correction.txt.</p>
Granulocyte Colony Stimulating Factor And Growth Hormone In Cirrhosis Of Liver: An Open Label Study
ClinicalTrials.gov study NCT02451033. IPD Sharing: Not stated. Countries: 1. Publications: 2.
Peg-Granulocyte-Colony Stimulating Factor (GCSF) for Coronary Collateral Growth in Coronary Artery Disease Patients
ClinicalTrials.gov study NCT00886509. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Data from: Allometric scaling of metabolism, growth, and activity in whole colonies of the seed harvester ant, Pogonomyrmex californicus
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Data from: Maize-dominated landscapes reduce bumble bee colony growth through pollen diversity loss
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Exposure to urban heavy metal contamination diminishes bumble bee colony growth
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Data from: Limitation of complementary resources affects colony growth, foraging behavior, and reproduction in bumble bees
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Data from: Growth and survival of the superorganism: ant colony macronutrient intake and investment
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Data from: When does growth rate influence fitness in a colonial marine invertebrate?
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Data from: Life-history strategy and behavioral type: risk-tolerance reflects growth rate and energy allocation in ant colonies
Despite the recent interest in animal personality and behavioral syndromes, there is a paucity of explanations for why distinct behavioral traits should evolve to correlate. We investigate whether such correlations across apparently distinct behavioral traits may be explained by variation in life history strategy among individual ant colonies. Life history theory predicts that the way in which individuals allocate energy towards somatic maintenance or reproduction drives several distinct traits in physiology, morphology, and energy use; it also predicts that an individual's willingness to engage in risky behaviors should depend on reproductive strategy. We use Temnothorax ants, which have been shown to exhibit 'personalities' and a syndrome that may reflect risk tolerance at the colony level. We measure colonies' relative investment in growth rate (new workers produced) compared to reproductive effort (males and queens produced). Comparing sterile worker production to reproductive alate production provides a direct measure of how colonies are investing their energy, analogous to investment in growth versus reproduction in a unitary organism. Consistently with this idea, we found that behavioral type of ant colonies was associated with their life history strategy: risk-tolerant colonies grew faster and invested more in reproduction, whereas risk-averse colonies had lower growth rate but invested relatively more in workers. This provides evidence that behavioral syndromes can be a consequence of life-history strategy variation, linking the two fields and supporting the use of an integrative approach.
Data from: Life-history strategy and behavioral type: risk-tolerance reflects growth rate and energy allocation in ant colonies
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.