Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 126 for “"Burrow"”.
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Drivers of burrow symbiont distribution in a softsediment system: host abundance or burrow trophic environment?
… Langebaan Lagoon sandflats are dominated by the burrowing activities of thalassinid shrimps. Their burrows are home to various burrow symbionts including a commensal shrimp (Betaeus jucundus), a six-legged crab (Spiroplax spiralis) and a scaleworm (Antinoe lactea). Little work has been conducted …
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Ecology and behaviour of burrowing prawns and their burrow symbionts
… Marine soft-sediment ecosystems are dominated by burrowing engineers which indirectly create biogenic structures that often attract other species, often leading to the evolution of symbiotic relationships. Engineered structures provide non-trophic (e.g. refuge) and trophic functions (e.g. food) …
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Thermoregulatory behavior of the crayfish Procambarus clarkii in a burrow environment
… and the environmental parameters of crayfish burrows were measured in situ. Although temperatures within burrows fluctuated less than surface temperatures in the Mojave Desert, crayfish can experience sub-optimal temperatures inside the burrow. In the laboratory, P. clarkii heated and cooled …
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Oxyconformity in Burrow-dwelling Crustaceans : Aerobic Metabolism of HEMISQUILLA ENSIGERA CALIFORNIENSIS
… ensigera califomiensis</em> is an active burrow-dwelling stomatopod crustacean common off the coast of Southern California (Basch and Engle, 1989). In this experiment I measured the typical burrow oxygen level, time taken to deplete the oxygen in an inhabited, capped burrow, and tested the …
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Arthropod fauna of Plains pocket gopher (<i>Geomys bursarius</i>) burrow systems
1 PDF file (vi, 45 pages)
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Developing and assessing methods to census and monitor burrow-nesting seabirds in Ireland
… of many species make them difficult to study. Burrow-nesting species are the most difficult of all seabird groups to census due to their cryptic breeding habits, nocturnal behaviours within breeding colonies, and coexistence with other burrowing species. Historically estimates of population …
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The relation of the skunk to game and burrow-using animals in Virginia
The skunk is an unprotected wildlife species in Virginia and few are hunted for sport and trapped for fur.
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The Aerobic Metabolism and Behavior of the Burrow-dwelling Mantis Shrimp, HEMISQUILLA ENSIGERA CALIFORNIENSIS
… to an observation tank with artificial burrows similar to those observed in the field. The animals were maintained under a 1OL:140 light-dark cycle and monitored on a 24-hour basis using a time-lapse video recorder. Infrared lamps were used for observations within the burrow and at …
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Behavioral ecology of the Colorado brown tarantula (Aphonopelma hentzi): Activities displayed around the burrow through juvenile group dispersal
… tended to show reduced activity at the burrow entrance, however; these, results were significant in only one comparison. After weeks of this parental care, juveniles will emerge from their silk egg casing before they disperse from the natal site. In the additional study reported in …
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A Comparison of Movements and Burrow Usage Between Indigenous and Relocated Gopher Tortoises (Gopherus polyphemus) in a Fall Line Sandhills Community
<p>The movements and burrow use of twenty (ten relocated and ten indigenous to the relocation site) adult gopher tortoises {Gopherus polyphemus) were followed during the late spring, summer and early autumn in Talbot County, Georgia. The objectives of this study were to determine whether relocated …
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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
… addition to odor. Odor plume behavior within the burrow environment was characterized using fluorescein dye visualization of an odor mimic in a model burrow for the second series of experiments. Combinations of slow and fast carrier and plume release rates were crossed with the following …
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Ventilation Behavior of the Mantis Shrimp, HEMISQUILLA ENSIGERA CALIFORNIENSIS IN HYPOXIC BURROWS
<p>The burrow-dwelling mantis shrimp, <em>Hemisquilla ensigera californiensis</em>, is an environmentally challenged 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 …
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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 context-specific roles of a bioturbating crab (Austrohelice crassa) on ecosystem functioning
… Austrohelice crassa (herein Austrohelice) is a burrow building estuarine crab endemic to New Zealand. The abundant and widespread nature of this species infers that its effects on sediment processes are likely to be significant. This thesis explores Austrohelice’s impact on ecosystem functioning …
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How a Central-Place Forager (Callospermophilus lateralis) Modifies its Movement Behavior to Navigate a Risky Landscape and Maximize Fitness
… larder-hoards seeds year-round in a central burrow. C. lateralis cannot always be at the burrow to defend the larder from pilferers, however, because they must leave to participate in other activities such as foraging. Additionally, when away from the burrow, individuals incur the cost of …
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Impacts of Microenvironment On Distributions and Activities of Bacteria In A Salt Marsh Environment
<p>Infaunal burrows and the rhizosphere of Spartina alterniflora are ecologically relevant microenvironments that impact the distributions of bacteria in a salt marsh ecosystem. Infaunal burrows produced by the fiddler crabs Uca pugilator and Uca pugnax are abundant features of southeastern United …
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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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The ciliary currents associated with feeding, digestion, and sediment removal in Adula (botula) falcata Gould 1851 (bivalvia, mytilidae)
… mytillids; namely, it must function within a burrow into which sediment material is being continuously deposited from both particle laden water passing over its burrow entrance and the mudstone byproducts of its own mechanical boring. The following is a comparative study on the ciliary …
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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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Drag coefficients on razor clams in slightly fluidized granular media
Razor clams are able to burrow deeply into granular media with only a small fraction of force required by traditional anchoring devices. It is hypothesized that the collapse of their shell and subsequent localized fluidization of the media is responsible for a large reduction in drag, thereby …
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