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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 497 for “"population density"”.
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Problems of population density in Boston
Thesis (M.C.P.) Massachusetts Institute of Technology. Dept. of Architecture, 1950.
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Nonlinear Filters for Estimating an Insect Population Density
Made available in DSpace on 2014-12-12T20:54:21Z (GMT). No. of bitstreams: 1 7616142.pdf: 4073255 bytes, checksum: ed2892dd26769bb5aa5080379fb7e08b (MD5) Previous issue date: 1976
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Greater Galagos near Mt. Kasigau, Kenya: Population Density Estimates
<p>This study examined population density and habitat use of a species of greater galago, genus <em>Otolemur</em>, around Mt. Kasigau, Kenya. Mt. Kasigau has a unique regional microclimate, a cloud forest, which provides many different flora and fauna a home. To examine population density, two …
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Characterization of a transcriptional response to population density in Bacillus subtilis
Bacteria keep track of their population density by using extracellular signaling molecules. In response to the accumulation of these signals, changes in gene expression coordinate the switch from unicellular activity to group behavior. In Bacillus subtilis, this shift towards social behavior …
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The effect of population density on the production of market turkeys
Population density as high as 0.70 square foot per bird had no apparent effect on growth, feed conversion, mortality, and market quality on Medium White turkeys to 10 weeks of age. At 14 weeks of age body weight and feed conversion decreased slightly for both males and females allowed less than …
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Spatially variable hydrologic regimes in relation to bog turtle (Glyptemys muhlenbergii) population density
… therein, explained variation in bog turtle population density across a wetland. In Chapter II, I observed wetland conditions in summer extremes to categorize wetland areas based on surface saturation into seep, always wet, and sometimes wet locations. I placed multiple water level monitoring …
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Effects of Habitat on Population Density of Centrarchid Species in the James River, Missouri
… was an effect of habitat on centrarchid species population density. Seven sites on the James River, Missouri were sampled two times each using a backpack electroshocker. Centrarchids were identified and measured. Habitat was measured. Macroinvertebrates were collected. Catch per unit effort …
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Genetic and metabolomic analysis of how population density modulates neuroendocrine physiology of C. elegans
In nature, organisms are presented with ever-changing environmental stimuli that can be beneficial or detrimental. Distinguishing the critically important environmental cues from the insignificant ones is integral to the survival of the organism. These cues may be based on chemical communication, …
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Feasibility of Indexing Largemouth Bass Population Density Using Electrofishing Catch Rate and Water Conductivity Measurement
… study was to develop an index to largemouth bass density using electrofishing catch per unit effort (CPUE, number of stock-length fish captured per hour of night electrofishing) and water conductivity measurements. Petersen population estimates were determined for largemouth bass in 14 small South …
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A study of population density of ancient, medieval and modern cities in relation to transportation
Thesis (M.C.P.)--Massachusetts Institute of Technology, Dept. of City and Regional Planning, 1961.
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Effect of population density on diel activity and growth in stream-dwelling Arctic charr Salvelinus alpinus
… to test the prediction that individuals at high population density will increase their activity rate and distribute their feeding activity over a greater portion of the 24 h cycle. Individually-tagged fish were stocked in semi-natural stream enclosures at low (2 fish/m2) and high (6 fish/m2) …
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A simulation study of the effect of target motion on sighting estimates of minke whale population density
Line transect methods used to estimate population density assume stationarity of targets. Violation of this assumption leads to overestimation of the true density. A simulation study based on a hazard-rate model is used to assess the resulting bias. The model is calibrated to generate sighting data …
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Estimating spotted hyaena (Crocuta crocuta) population density using camera trap data in a spatially-explicit capture-recapture framework
Species-specific population data are important for the effective management and conservation of wildlife populations within protected areas. However such data are often logistically difficult and expensive to attain for species that are rare and have large ranges. Camera trap surveys provide a …
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Estimating population density and survival of ocelots in six study sites over multiple years in Belize, Central America
… data from long-term monitoring of ocelot populations on six different protected areas in Belize over a time span ranging from 1 to 12 years, with 1,700 ocelot detections in 65,157 total trap nights. I used classical and spatially explicit methods, including multi-session robust design, to …
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