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36 results for “feeding rates”
Flume experiments on the effects of sediment feed rates on step formation, evolution and stability
<p>The dataset contains:</p> <p>- Digital Elevation Models of the experiments collected every hour</p> <p>- Pics of the Bed topography collected every hour</p> <p>- Step number, location, evolution (as described in the paper submitted to Earth Surface Dynamics)</p> <p>- Bed grain-size distribution, sediment and sediment concentration.</p>
Figure 1. Experimental units for feeding rates tests with terrestrial isopods and fecal pellets from different food sources. A in Coprophagy in detritivores: methodological design for feeding studies in terrestrial isopods (Crustacea, Isopoda, Oniscidea)
Figure 1. Experimental units for feeding rates tests with terrestrial isopods and fecal pellets from different food sources. A) Treatment access; coprophagy is allowed. B) Treatment removal; coprophagy and bacterial activity on feces are avoided. C) Treatment net; coprophagy is avoided and bacterial activity on feces allowed. D) Fecal pellet from carrot (left) and decomposing leaf (right) consumption.
Does artificial feeding impact neonate growth rates in a large free-ranging mammal?
<p>Variation and disparity in resource access between individuals in an animal population require attention within human-dominated landscapes where artificial selection processes may be at work. Independent, recreational human-wildlife feeding interactions constitute an increasingly prevalent yet understudied food resource for birds and mammals living in our cities, but only a limited number of risk-taking individuals may access it. Using urban fallow deer as our model species, we hypothesised that if these interactions result in positive effects for the engaging individual, e.g. increased milk quality and yield, then this would result in the increased growth rates of their offspring. Alternatively, if these individuals were prioritising investing time in engagement with humans, resulting in decreased maternal care, then this would result in slower growth rates in offspring. We found that the offspring of those females that regularly interacted with humans displayed significantly faster growth rates than the risk-avoider counterparts. This advantage for fearless mothers in terms of boosted neonatal growth rates could be mirrored in birds accessing garden feeders, seagulls or pigeons utilizing urban resources, or seals approaching city harbours. Here, we add a new piece to the complex puzzle of how humans are manipulating wildlife living within human-dominated landscapes.</p>
Biomass encounter rates limit the size scaling of feeding interactions: trial data
<p>Experimental trial data for the publication: Biomass encounter rates limit the size scaling of feeding interactions.</p>
Data for: Foraging habitat and site selection do not affect feeding rates in European shags
<p>Igor files of depth, temperature and 3-axis acceleration of data-loggers deployed on European shags at Isle of May Scotland in late May-early June 2006. File name is bird ID. Information of all birds is in the Excel file "Shag2006Birds."</p>
Data for: Foraging habitat and site selection do not affect feeding rates in European shags
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Does artificial feeding impact neonate growth rates in a large free-ranging mammal?
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Data from: A high-throughput method to quantify feeding rates in aquatic organisms: A case study with Daphnia
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Prominent grazing rates and feeding preferences of an abundant exotic benthic herbivore in the western Mediterranean Sea
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Collateral benefits of targeted supplementary feeding on demography and growth rate of a threatened population
<p>1. Effective evidence-based conservation requires full quantification of the impacts of targeted management interventions on focal populations. Such impacts may extend beyond target individuals to also affect demographic rates of non-target conspecifics (e.g. different age classes). However, such collateral (i.e. unplanned) impacts are rarely evaluated, despite their potential to substantially alter conservation outcomes. Subsequent management decisions may then be poorly informed or erroneous.</p> <p>2. We used 15 years of individual-based demographic data in a "before-after control-impact" (BACI) analysis to quantify collateral demographic impacts of a targeted multi-year supplementary feeding programme designed to increase sub-adult survival and hence viability of a small, threatened red-billed chough (<i>Pyrrhocorax pyrrhocorax</i>) population. Specifically, we assessed whether the intervention also affected adult survival and reproductive success, and whether such collateral effects were themselves sufficient to stabilise population size and hence achieve short-term conservation aims.</p> <p>3. The probabilities of adult survival and successful reproduction increased substantially between the "before-feeding" and "during-feeding" periods in those choughs associated with supplementary feeding, but not otherwise. Overall breeding success (i.e. number of chicks fledged per occupied territory) also tended to increase, even though brood sizes did not increase. These relationships, which were detectible only through BACI analyses, suggest that supplementary feeding targeted at sub-adults had unplanned positive impacts on adult demographic rates.</p> <p>4. Deterministic matrix models designed to project population growth demonstrate that these estimated collateral effects were sufficient to make a substantial contribution to increasing population growth rate and achieving short-term population stability.</p> <p>5. Synthesis and applications. Our results indicate substantial positive collateral impacts of a targeted supplementary feeding intervention on population viability, despite no <i>a priori</i> expectation that the non-target adults were food-limited. This case-study illustrates how thorough assessment of collateral impacts of targeted interventions can affect assessment of short-term efficacy and reveal new opportunities for future interventions, thereby informing subsequent management decisions.</p>
Data from: Isotopic turnover rates and diet-tissue discrimination depend on feeding habits of freshwater snails
Estimates of animal diets and trophic structure using stable isotope analysis are strongly affected by diet-tissue discrimination and tissue turnover rates, yet these factors are often unknown for consumers because they must be measured using controlled-feeding studies. Furthermore, these parameters may be influenced by diet quality, growth, and other factors. We measured the effect of dietary protein content on diet-tissue discrimination and tissue turnover in three freshwater snail species. We fed lettuce to individually housed snails (n = 450 per species) for ten weeks, then half were switched to a high-protein diet. Isotopic values of muscle and gonad tissue were assessed at 48 and 80 days post-diet change. Snail discrimination factors varied by diet (low-protein > high-protein) and usually differed among species for both N and C, although species had similar carbon discrimination when fed the low-protein diet. Carbon turnover rates were similar among species for a given tissue type, but nitrogen turnover varied more among species. In addition, diet affected growth of species differently; some species grew larger on high-protein (H. trivolvis) while others grew larger on low-protein diet (Lymnaea spp.). These differences among species in growth influenced turnover rates, which were faster in the species with the highest growth rate following the diet switch from low to high-protein. Thus, growth is one of the main processes that affects tissue turnover, but growth and feeding preference did not affect diet-tissue discrimination, which was greater on low-protein than high-protein diets for all species regardless of growth performance. These results suggest that diet might influence two key parameters of stable isotope analysis differently.
Raw data on mortality, feeding rates, swimming behavior and energy reserves: Goetz et al 2022
<p><span>The abundance and persistence of plastic nanoparticles in aquatic habitats are considered a threat to marine and freshwater biota. However, the risk assessment of plastic particles is complicated due to various factors that need to be considered, including composition, size and environmental abundance.</span><span><br></span></p> <p><span>This study investigated the behavioural response of a key river species, <em>Gammarus roeseli</em>, to dietary exposure of plain biodegradable and non-biodegradable plastic as well as to natural small micro- and nanoparticles. Mortality, feeding, swimming velocity and energy assimilation endpoints were examined by considering four particles sizes ranging from 30 to 1000 nm in two concentrations.</span><span><br></span></p> <p><span>Contrary to our expectations, neither decreasing size nor increasing abundance of each tested particle impacted any of the examined endpoints. Likewise, dietary exposition with biodegradable plain polylactide did not induce other or stronger effects than non-biodegradable plain polystyrene or natural silica micro- and nanoparticles, as all three particle types did not lead to adverse effects on <em>G. roeseli</em>. These findings also suggest that the functional role of <em>Gammarus roeseli</em> as a shredder is not impaired due to particle occurrence within the exposure range of this study.</span></p>
The influence of wet feed distribution on the density, growth rate and growth variability of Tenebrio molitor
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Figure 2 in Functional responses and feeding rates of Mesocyclops pehpeiensis Hu (Copepoda) fed different diets (rotifers, cladocerans, alga and cyanobacteria)
Figure 2. Functional response curves of Mesocyclops pehpeiensis fed Brachionus rubens with (closed circles) and without (open circles) algae at different densities and under different temperature regimes. Replicate data are plotted for each prey concentration. Transformations are based on the Michaelis–Menten equation shown in Material and Methods.
Figure 3 in Functional responses and feeding rates of Mesocyclops pehpeiensis Hu (Copepoda) fed different diets (rotifers, cladocerans, alga and cyanobacteria)
Figure 3. Phytoplankton (Chlorella vulgaris and Anabaena sp.) consumption by adult female Mesocyclops pehpeiensis. Values represent mean ± SE based on four replicates. For each phytoplankton species, data indicated by dissimilar letters are statistically significant (p <0.05, Tukey test).
Figure 1 in Functional responses and feeding rates of Mesocyclops pehpeiensis Hu (Copepoda) fed different diets (rotifers, cladocerans, alga and cyanobacteria)
Figure 1. Prey selectivity index (Manly's α) by the copepod Mesocyclops pehpeiensis offered different prey species at low (0.5 ind. ml−1) and high (2.0 ind. ml−1) densities. Data bars above the horizontal line represent active prey selection.
Integrated multitrophic culture of shrimp Litopenaeus vannamei and mullet Mugil liza in biofloc system with different feeding rates for fish
<p>This study aimed to evaluate the effect of different feeding rates for mullets on the zootechnical performance of <em>Litopenaeus vannamei</em> and <em>Mugil liza</em> in an integrated multitrophic culture of shrimp and mullet in a biofloc system and on the efficiency of the system. For this, an experimental study of 46 days was carried out at the Marine Shrimp Laboratory of the Federal University of Santa Catarina. The experiment had four treatments, each one with four replicates: A0 (feed offer for shrimp and no feed offer for mullets), A1 (feed offer for shrimp and offer of 1% of fish biomass of feed for mullets), A2 (feed offer for shrimp and offer of 2% of fish biomass as feed for mullets) and A3 (feed offer for shrimp and offer of 3% of fish biomass for feed for the mullets). Each experimental unit consisted of an 800 L tank, in which shrimp were stocked, and a 90 L tank, used for mullets, connected to a recirculation system. Shrimp were stocked with an initial weight of 2.36 g ± 0.02 g. Mullets’ inicial weight was 17.06 g ± 0.65 g. The stocking density used was 375 shrimp m<sup>-3</sup> (300 shrimp per tank), while the fish density was 167 fish m<sup>-3</sup> (15 fish per tank). Animal growth performance, water quality, as well as total heterotrophic bacteria and <em>Vibrio </em>sp<em>.</em> concentration in the system were evaluated. It was observed that shrimp performance was not affected by different feed offer for fish, having in the end a survival above 82%, weekly growth around 1.50 g and feed conversion factor close to 1.60 in all treatments. Despite the higher input of nutrients into the system with higher food supply, there was no change in the water quality parameters with the treatments, or in the count of total heterotrophic bacteria and <em>Vibrio sp.</em> <a href="#_msocom_1">[1]</a> In conclusion, the best feed supply rate in the integrated cultivation of shrimp and mullet was 2%, due to the proximity of the results of zootechnical performance with the 3% rate, without affecting water quality or the count of total heterotrophic bacteria and genus <em>Vibrio sp.</em></p>
A Smartphone-Based Approach to Improved Breast-Feeding Rates And Self-Efficacy
ClinicalTrials.gov study NCT04816383. IPD Sharing: NO. Countries: 1. Publications: 1.
Effects of Implementation of a Care Bundle on Rates of NEC and Own Mother's Milk Feeding in the East Midlands
ClinicalTrials.gov study NCT05934123. IPD Sharing: NO. Countries: 1. Publications: 1.
Human Milk Feeding Rates Post-NICU Discharge
ClinicalTrials.gov study NCT02692521. IPD Sharing: Not stated. Countries: 1. Publications: 5.
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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)
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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.