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Showing 1 to 20 of 160 for “"Burrows"”.
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A HYDROLOGICAL INVESTIGATION OF THREE DEVON SAND DUNE SYSTEMS; BRAUNTON BURROWS, NORTHAM BURROWS AND DAWLISH WARREN
… Devon's three largest sand dune systems Braunton Burrows, Northam Burrows and Dawlish Warren were drying out to the detriment of the dune habitat flora and fauna. Research was therefore required to understand how these systems functioned hydrologically, to determine whether they were drying out …
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Synapsid Burrows in the Lower Jurassic Navajo Sandstone, Utah
… near Moab, Utah are interpreted as synapsid burrows based on similar morphologies to fossil and extant synapsid burrows. Two types of burrows are distinguished by their size. Type I burrows are large diameter and comprise complex, high density sinuous tunnels, Y- and T- branched tunnels, …
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The Lungfish Gnathorhiza and Its Burrows From the Permian of Kansas
… (Speiser Shale). At the Junction City locality, burrows allow a refinement of the interpretation of the behavior and life habits of the lungfish Gnathorhiza. Gnathorhiza withdrew from adverse environmental conditions into flask-shaped burrows similar to modem lungfish estivation burrows. Evidence …
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Burrows and bedding : site taphonomy and spatial archeaology at Tortoise cave
Excavations at the Late Stone Age site of Tortoise Cave, a shell midden accumulation in the Western Cape, South Africa, were carried out from 1978 to 1983. The author supervised this project from 1981 onwards with the aim of expanding the cultural sample and defining more clearly the stratigraphic …
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Ventilation Behavior of the Mantis Shrimp, HEMISQUILLA ENSIGERA CALIFORNIENSIS IN HYPOXIC BURROWS
… marine species due to the fact it inhabits burrows located beneath the surface of the sediment where oxygen pressure is low and easily depleted. This experiment revealed that burrow oxygen pressure (pO<sub>2</sub>) is frequently hypoxic and can become anoxic. Average pO<sub>2</sub> within …
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Bioturbation in Supratidal Carbonates: Georadar Characterization of the Patterns and Structure of Decapod Burrows
… surveys captured a diverse suite of >120 burrows of ghost (Ocypode quadrata), blackback (Gecarcinus lateralis) and blue (Cardisoma guanhumi) land crabs. Site-specific post-processing protocols were used to establish characteristic attributes that distinguish unfilled burrows from other …
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Higher Compression from the Burrows-Wheeler Transform with New Algorithms for the List Update Problem
Burrows-Wheeler compression is a three stage process in which the data is transformed with the Burrows-Wheeler Transform, then transformed with Move-To-Front, and finally encoded with an entropy coder. Move-To-Front, Transpose, and Frequency Count are some of the many algorithms used on the List …
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Gopher tortoise nest-site selection at burrows and the influence of nest environment on hatching success
… gopher tortoise nest-site selection at burrows and 2) how that nest environment both directly (nest microclimate: temperature and moisture) and indirectly (nest characteristics: nest depth, distance from burrow, canopy and understory cover, percent clay in soil, and lay date) affects …
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The Role of Gopher Tortoise Burrows (Gopherus polyphemus) in Shaping Herpetofaunal Diversity in the Sandhills of Southeast Georgia
… and vertebrate species associated with their burrows. I compared herpetofaunal species diversity and richness at Gopher Tortoise burrows and random points not near burrows on a sandhill in Southeast Georgia. I also compared habitat structure between burrows and random arrays. Trapping took …
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Ichnology and sedimentology of large tetrapod burrows in the latest Early Triassic Katberg Formation, south-eastern main Karoo Basin, South Africa
… large (~11 cm diameter and up to 2 m in length) burrows were studied at three localities in the Early Triassic Katberg Formation in the south-eastern and central parts of the main Karoo Basin, Eastern Cape, South Africa. The most interesting site, Hobbs Hill, northwest of Cathcart (Eastern Cape) …
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Effects of Urbanization on Survival Rates, Anti-Predator Behavior, and Movements of Woodchucks (Marmota Monax)
… of vigilance, foraging distance from burrows, and flight initiation distance—did not vary with urbanization. Julian date was related to all components of anti-predator behavior in a consistent manner, which indicates woodchucks take on more risk later in the active season as …
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Terrestrial Movements and Habitat Use of Gopher Frogs (Rana capito) at Fort Benning, Georgia
… moved between various locations, types of burrows used as refugia, general habitat descriptions, and extent of habitat use. Results indicated that dispersal distances from the breeding site and distances moved between burrow locations varied a great deal between individuals, however all …
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Characterizing Wetland Hydrology, Chemistry, And Soils For An Endemic Crayfish, The Piedmont Blue Burrower
… shallow wells installed among <em>C. harti</em> burrows and in similar areas without burrows (< 50 m away) at 4 sites across Meriwether County (GA). Groundwater depth and temperature were automatically recorded every 30 min, whereas dissolved oxygen and pH were measured manually every 1-4 weeks …
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Home Range, Activity Period, Burrow Use, and Body Temperatures of the Nine-Banded Armadillo (Dasypus Novemcinctus) on the Northern Edge of Its Range
… were observed utilizing from one to four burrows and mulitiple individuals were found in the same burrow. During the winter a shift in activity from nocturnal to diurnal behavior was observed. There was a strong correlation between the seasonal shift in activity and temperature. The …
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The utilization of chemical communication by three species of ghost shrimp, Callichirus islagrande, Callichirus major, and Lepidophthalmus louisianensis, and the transport of chemical cues within and between burrows
… (shrimp mimcs). Communication between burrows was modeled using two porous burrow mimics built in natural sediment, 3.5 ml min-1 burrow effluent pumping rate, and 5 cm s-1 flow condition in a race track flume. Rhodamine-FWT effluent was tracked using fluorometery. The effect of burrow …
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Life History and Ecology of the Black-Footed Ferret in the Wild
… formed by ferrets digging in prairie-dog burrows was a characteristic sign indicating that ferrets were present. Numerous plugged burrows formed by prairie dogs covering holes presently or recently occupied by ferrets may also be a sign. All evidence indicated that prairie dogs were the …
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Colony structure and function in the Bank Swallow, <i>Riparia riparia</i>, L.
… swallow of the Northern Hemisphere. It nests in burrows which it digs in stream banks or in man-made excavations in sand and gravel banks. Colonies located in seven sand banks near Ellenville, New York, were studied.</p> <p>Data were collected on 2,816 birds banded from 1965 to 1976 and on 246 …
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Effetti dell'attività della fauna sulla stabilità degli argini: Valutazione Ecoidraulica dei meccanismi di rottura arginale e tecniche di ripristino
… the main geometric characteristics of animal burrows. Specifically, after a visual inspection of the activity of burrowing animals, and after measuring the dimensions of the hole entrances, a Ground Penetrating Radar (GPR) survey was carried out to investigate depths and paths of these dens. …
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Efficiency of Two Black-tailed Prairie Dog Rodenticides and Their Impacts on Non-target Bird Species
… Prairie dog burrow densities ranged from 54-187 burrows/ha with an average burrow density of 114 ±8 (± SE) burrows/ha. Rodenticide short-term control reduced active burrows by 95% with zinc phosphide, 42% with only strychnine, and 78% with prebaited strychnine. More zinc phosphide was consumed …
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Burrowing Behavior of the Fiddler Crab <i>Uca panacea</i> in Relation to Food Availability
… regulated by the tides and centers around their burrows. Field and laboratory studies were conducted to assess the effect of food availability on burrowing in the Gulf coast fiddler crab, Vea panacea. In the field, crabs were observed for droving behavior through visual observations; evidence for …
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