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Settlement ecology of juvenile cod Gadus morhua, haddock Melanogrammus aeglefinus and whiting Merlangius merlangusDemain, Dorota K. January 2010 (has links)
Cod, haddock and whiting are among the most economically important species in the Scottish demersal fishery. Juvenile settlement, the transition from pelagic to demersal habitat, has been identified as an important milestone for these species, but there is insufficient knowledge and data about this life stage. It is believed that the period of settlement has an impact on recruitment success, as important density-dependent processes may take place, such as competition for suitable substrate, refuge or prey. Also, knowledge of settlement timing and duration is relevant to understanding population connectivity and thus to the development of successful conservation measures. Sampling was conducted between April and August 2004, June and September 2005 and June and July 2006 at an inshore site off the east coast of Scotland. Over 4000 0- group cod, haddock and whiting were collected. Comprehensive morphometric and dietary analyses of the samples were carried out, followed by statistical analysis of the data. The results suggested clear differences in the patterns of settlement between the different species. Initially juvenile haddock favoured deeper, further offshore locations, while cod occupied shallower, inshore waters. Whiting settled much later in the season and over protracted period of time. Furthermore, cod showed an affinity for structured habitat, while haddock and whiting were found only over sand. The results also showed that the transition from the pelagic to the demersal habitat was associated with clear and progressive changes in the prey composition of the juvenile fish. The results also showed temporal, spatial and dietary niche segregation of settling juveniles, which is expected to reduce competition for resources and increase the potential for settlement success.
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Long term evaluations of the effects of Irlen tinted lenses on academic and related skillsBurgess, J. E., n/a January 1990 (has links)
This survey research systematically collects
Information on the long term effects of Irlen tinted
lenses, from a specific diagnosed scotopic sensitive
population. The survey used is based on Whiting's
survey (1988), with variations and extensions made to
increase information attained. Although the main focus
of the survey is reading and related academic skills,
other areas presenting new directions for further
research, have also been included. 306 diagnosed
scotopic sensitive Individuals, who had been using
prescribed Irlen tinted lenses for a minimum of six
months, were surveyed. 82.8 percent of the respondents
indicated that they (or their child) had experienced
great benefits from wearing Irlen tinted lenses. 70.1
percent Indicated that the greatest benefit had been in
the area of reading. Cross-tabulations were made with
length of time wearing the lenses, gender, and whether
the respondent was filling in the questionnaire for
themselves or for their child. The results of this
descriptive research support Whiting's (1988), earlier
findings. A review of the available literature and the
Implications of these findings are discussed.
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Whiting Events Off Southwest Florida: Remote Sensing and Field ObservationsLong, Jacqueline 02 November 2016 (has links)
“Whiting” is a term used to describe a sharply defined patch of water that contains high levels of suspended, fine-grained calcium carbonate (CaCO3). These features are named for their bright (at times white) appearance when compared to surrounding waters, and have been found to occur globally, persisting for multiple consecutive days. Although whitings have been widely studied using chemical, biological, geological, and physical techniques, there has been little effort to document their spatio-temporal distributions in a systematic way, not to mention the lack of consensus on what generates whitings and allows them to persist for days to weeks at a time. In particular, although fishermen and aircraft pilots have reported whiting-like features off southwest Florida (e.g., a sighting off the Ten Thousand Islands was reported on October 29, 2013), there has been no targeted study on these features in this area. Therefore, the objective of this study is two fold: 1) to document the spatial-temporal distributions of whitings in southwest Florida (SWFL) coastal waters from 2003 through 2015 using satellite imagery to study how their occurrence is related to several environmental variables and 2) to conduct field and laboratory measurements to determine the particle composition and water characteristics in and outside the whiting features.
To achieve objective one, a multi-year time series from 2003 through 2015 was developed over SWFL using Moderate Resolution Imaging Spectroradiometer (MODIS) observations. Customized processing was used in order to removed clouds and other artifacts and to delineate the surface whiting features. From this, statistics and distribution maps of whiting occurrence were generated. Annual mean whiting coverage peaked in 2011 (11 km2), when whiting reached a maximum daily visible coverage of 92 km2 on February 23. For the entire time series, the highest daily coverage observed was 126 km2 on December 6, 2008. Over all, whitings had higher spatial coverage during the spring and autumn, with 88% of all whiting coverage occurring within 40 km of the coastline. Images of average seasonal spatial distributions showed that over 90% of whitings located between 40 and 70 km of shore occurred specifically during the winter and autumn. A multivariate linear regression was performed, which found little to no correlation between annual whiting coverage and environmental factors such as sea surface temperature (SST), wind, and river discharge. This analysis was also applied to spatial distributions of whiting events within and outside of 20 km and 40 km from shore. The only statistically significant result was that of SST, as well as SST with river discharge and whiting events distributed more than 20 km from shore.
In order to accomplish objective two, several field campaigns were conducted to collect in-situ data and water samples of pre-, post-, and occurring whiting event conditions to provide information on composition, driving forces, and variables that cannot be derived via satellites. Samples were collected for taxonomic identification, chemical analysis, bottom sediment grain size fractionation, in-situ remote sensing reflectance (Rrs), particle backscattering (bbp), chlorophyll-a concentration ([chl-a]), particulate absorption (ap), and gelbstoff (otherwise known as color dissolved organic matter, or CDOM) absorption (ag). Taxonomic identification of marine phytoplankton within whiting water revealed the presence of a dominant, small (<5 >μm), centric diatom species during a sampled whiting event. Through the use of scanning electron microscopy (SEM), these were identified as Thalassiosira sp. Amorphous to fully formed crystals of calcium carbonate were present, attached to cells of Thalassiosira sp., localized to the girdle bands. All other diatom species were devoid of similar growths. In comparing the waters within a whiting area to outside waters, no significant differences were found in ap, ag, nor [chl-a]. The carbonate parameters of whiting water differed from outside water, however due to low sample numbers these results are inconclusive. Average backscattering was twice as high within whiting waters compared to non-whiting water, and measured in-situ Rrs was higher at all wavelengths (400 – 700 nm) within whiting water, with a spectral shape similar to outside waters.
Overall, this is the first time that SWFL whiting events have been characterized systematically using satellite imagery, field and laboratory as well as meteorological data to diagnose whiting causes and maintenance mechanisms. Although these results are inconclusive, they add new information to the existing literature on this phenomenon.
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Refining Nature: Standard Oil and the Limits of Efficiency, 1863-1920Wlasiuk, Jonathan Joseph January 2011 (has links)
No description available.
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Bringing "Culture" to Cleveland: East Asian Art, Sympathetic Appropriation, and the Cleveland Museum of Art, 1914-1930Adams, Christa January 2015 (has links)
No description available.
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Where There's Smoke: Fire Narratives From the Long American CenturyRyan Schnurr (16626339) 25 July 2023 (has links)
<p>This project argues that industrial fires have the capacity to illuminate the complex entanglements (political, ecological, economic, etc.) of life in the era of industrial capitalism. It retells and reframes the stories of five such fires, each off which shines a light on the networks of social, political, technological, economic, and ecological relationships in particular communities at particular moments. It thus contributes to the interdisciplinary fields of American Studies and the environmental humanities, furthering our understanding of the unfolding experience of industrial capitalism in the twentieth and twenty-first century United States. It takes the form of a public humanities project and is produced for a popular audience, using journalistic, literary, historical, and other techniques to tell the stories of these fires. In doing so, I also hope to contribute to the expansion of public humanities scholarship and help foster a thriving and creative future for the humanities both in academia and beyond.</p>
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