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8 results for “diel movement”
Fig. 3 in Diel movement patterns of Pacific sugar limpet, Patelloida saccharina (Gastropoda: Patellogastropoda: Lottiidae) in response to semi-diurnal tides of Samal Island, Philippines
Fig. 3. Movement patterns of Patelloida saccharina limpets in Catagman, Samal Island, during various lunar phases. A, New Moon, 27–28 March 2017; B, First Quarter, 4–5 April 2017; C, Full Moon, 9–10 April 2017; D, Last Quarter, 19–20 April 2017. The left and right y-axes correspond to the percentage of moving limpets and tidal height measurements in metres above chart datum (C.D.), respectively. Grey vertical bars represent the percentage of actively moving limpets during each lunar phase. The bar at the bottom corresponds to the day-night cycle: (from left to right) white = daytime, grey = transitioning to sunset, black = night-time, grey = sunrise. Note that the activity of P. saccharina limpets was observed during dark periods only, from sunset to night-time until before sunrise, as long as they were covered by the tide.
Fig. 2 in Diel movement patterns of Pacific sugar limpet, Patelloida saccharina (Gastropoda: Patellogastropoda: Lottiidae) in response to semi-diurnal tides of Samal Island, Philippines
Fig. 2. Patelloida saccharina clamped on: A, bare rock face; B, rock covered with sand and turf algae. C, portion of the 5 × 5 cm grid quadrat laid on a reef patch with three P. saccharina individuals. Apices of limpet shells were painted with nail polish. Photographs by EY Zapanta and MA Fortaleza.
Vicuna antipredator diel movement drives spatial nutrient subsidies in a high Andean ecosystem
<p>Large animals could be important drivers of spatial nutrient subsidies when they ingest resources in some habitats and release them in others, even moving nutrients against elevational gradients. In high Andean deserts, vicuñas (<em>Vicugna vicugna</em>) move daily between nutrient-rich wet meadows, where there is abundant water and forage but high risk of predation by pumas (<em>Puma concolor</em>), and nutrient-poor open plains with lower risk of predation. In all habitats, vicuñas defecate and urinate in communal latrines. We investigated how these latrines impacted soil and plant nutrient concentrations across three habitats in the Andean ecosystem (meadows, plains, and canyons), and used stable isotope analysis to explore the source of fecal nutrients in latrines. Latrine soils had higher concentrations of nitrogen, carbon, and other nutrients than did non-latrine soils across all habitats. These inputs corresponded with an increase in plant quality (lower C:N) at latrine sites in plains and canyons, but not in meadows. Stable isotope mixing models suggest that ~7% of nutrients in plains latrines originated from vegetation in meadows, which is disproportionately higher than the relative proportion of meadow habitat (2.6%) in the study area. In contrast, ~68% of nutrients in meadow latrines appear to originate from plains and canyon vegetation, though these habitats made up nearly 98% of the study area. Vicuña diel movements thus appear to concentrate nutrients in latrines within habitats and to drive cross-habitat nutrient subsidies, with disproportionate transport from low-lying, nutrient-rich meadows to more elevated, nutrient-poor plains. Scaling these results up to the landscape scale, the amount of nitrogen and phosphorus subsidized in soil at plains latrines was of the same order of magnitude as estimates of annual atmospheric nitrogen and phosphorus deposition for this region (albeit far more localized and patchy). Thus, vicuña-mediated nutrient redistribution and deposition appears to be an important process impacting ecosystem functioning in arid Andean environments, on par with other major inputs of nutrients to the system.</p>
Vicuna antipredator diel movement drives spatial nutrient subsidies in a high Andean ecosystem
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Understanding how diel and seasonal rhythms affect the movements of a small non-migratory bird
Diel and seasonal rhythms affect an animal's environment and life history. Understanding how these rhythms influence movement increases our knowledge on how animals adjust to changing resources, environmental conditions, and risk to their survival. To better understand how diel and seasonal rhythms affect animals, we evaluated movements of Northern Bobwhite (Colinus virginianus); hereafter, bobwhite. Because bobwhite are a small non-migratory species that must cope with daily and seasonal changes in their environment year-around, they are a model species to study how diel and seasonal rhythms influence animal movement of a non-migratory species. Global positioning system data from transmitters attached to bobwhite at four wildlife management sites across Oklahoma were collected during 2019–2021. We parsed the diel data as daytime (7:00–19:00 Central Daylight Savings Time [CDT]) and nighttime (19:00–7:00 CDT), and diurnal (sunrise–sunset) and nocturnal (sunset–sunrise) as well as by astronomical season. We calculated three movement metrics: net displacement (Euclidean distance from the starting fix to the ending fix of a path which encompasses consecutive relocations in a time series of geographic fixes), cumulative distance (sum of all Euclidean distances between each consecutive fix along the path), and hourly movement. We modeled the data using a generalized linear mixed-modeling approach. Across season, model predictions showed that net displacement was highest during spring, and daytime cumulative distance slowly increased as the year progressed. Bobwhite had two movement peaks during the diurnal period, one during 9:00–10:00 and the other during 17:00–20:00 depending on the season. Despite being diurnal, bobwhite occasionally made nocturnal movements, likely in response to a disturbance by a predator, inclement weather, or energetic demands. Movement peaks during the diurnal period may reflect changes in behavior in response to energy requirements, predator risk, and changes in air temperature. Life history events, likely cause seasonal differences in movement. This study furthers our understanding on how animals move daily and seasonally suggesting the importance of analyzing movement across the entire year because animals move differently across the day and year.
Data from: Reverse diel vertical movements of oceanic manta rays off the northern coast of Peru and implications for conservation
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Understanding how diel and seasonal rhythms affect the movements of a small non-migratory bird
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Data from: Diel movement patterns influence daily variation in wolf kill rates on moose
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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.