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 15 of 15 for “"commercial harvest"”.
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The Effects of Commercial Harvest on the Density and Demography of Aquatic Turtles in Arkansas
… is one of the least regulated in terms of commercial aquatic turtle harvest and has undergone large-scale habitat conversion from bottomland hardwood forest wetlands to agriculture, yet little is known about freshwater turtle populations within this region. As awareness of the plight of …
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Determinants for the Timing of Escapement From the Sockeye Salmon Fishery of the Copper River, Alaska: A Simulation Model
… seasonal migration rates of salmon through a harvest area from catch and escapement data. The time series for the total population of Copper River sockeye salmon (<em>Oncorhynchus nerka</em>) was reconstructed in the reference frame of the commercial harvest area from catch and escapement …
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Cultural Politics and Mining Development in Alaska's Bristol Bay Fishery
… Alaska boasts the world’s largest remaining commercial harvest of sockeye salmon (Oncorhyncus nerka). In the previous decade, the transnational mining industry has intensified its efforts to develop open-pit mining operations near the headwaters of the region’s Kvichak and Nushagak river …
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Cultural Politics and Mining Development in Alaska's Bristol Bay Fishery
… Alaska boasts the world’s largest remaining commercial harvest of sockeye salmon (Oncorhyncus nerka). In the previous decade, the transnational mining industry has intensified its efforts to develop open-pit mining operations near the headwaters of the region’s Kvichak and Nushagak river …
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Spatial Behavior and Population Estimation of the Alligator Snapping Turtle (Macrochelys Temminckii)
… have been subjected to over a century of commercial and recreational harvest, causing large scale population declines. Additionally, their aquatic habitat has been subjected to largescale anthropogenic degradation. Very few robust populations have been identified or investigated by …
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Effect of canopy manipulation and fermentation on grape aroma components
… in the leaf-pulled fruit including four of six commercial harvest dates. The total quantity of the bound geraniol, nerol, linalool, and a terpineol was higher in fruit from the leaf-pulled vines at harvest. Four strains of Saccharomyces cerevisiae were evaluated for their influences on free and …
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Effects of Alternative Silvicultural Treatments on Regeneration in the Southern Appalachians
Harvesting practices in the southern Appalachians have moved away from clearcutting in favor of variable retention harvesting systems. A study was initiated in 1995-8 to investigate the effects of retaining varying numbers of residual trees on regeneration in seven silvicultural treatments. A …
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Nitrogen fertilization, yield components, and species selection of perennial grass bioenergy cropping systems across eastern North America
… potential of soybean. Finally, as a sidebar, harvest results using a plot-scale combine and a commercial harvest system were strongly correlated, which indicates that the plot-scale combine is a good estimator of overall yields. These results show that applied nitrogen fertilizer increases …
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Development of a diet for rearing juvenile freshwater mussels
… and another dozen species support a declining commercial harvest of shells for the cultured pearl industry in Asia. Because of these Significant declines in abundance, a study was undertaken to develop a diet for rearing juvenile mussels, with the goal of long-term propagation of rare species. …
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Evaluation of Seed Impact Mills for Harvest Weed Seed Control in Soybean and Wheat in the Eastern United States
Harvest Weed Seed Control (HWSC) concentrates, removes, or destroys weed seeds as they pass through the combine. Seed impact mills are modifications that are mounted directly to the back of a combine and are one way to implement HWSC. Seed impact mills kill weed seeds during harvest, preventing …
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Factors affecting the levels of 3-isobutyl-2-methoxypyrazine and C6 compounds in Vitis vinifera L. Merlot.
… concentration of IBMP and C6 compounds in fruit harvested from 69 commercial vineyards located in three distinctly different wine grape growing regions were measured at commercial maturity from 2007 to 2010. Seasonal variation of green aromas was found to be more important than regional …
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Scale and impact of the illegal leopard skin trade for traditional use in southern Africa
… loss, prey depletion, conflict with humans, and commercial harvest for body parts. The extensive use of leopard derivatives among traditional healers, royalty, and culturo-religious groups poses a known but poorly understood threat to leopards. Sociopolitical sensitivities surrounding cultural …
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Fruit-based allometry of Strychnos madagascariensis, S. spinosa, and Trichilia emetica in the savanna woodlands of the Umhlabuyalingana municipality, KwaZulu-Natal, South Africa
… Trichilia emetica, which have a potential for commercial harvest from the wild. Assessment of the profitability of harvesting their fruits and as well as informed decisions to harvest their fruits require an estimation or quantification of the yields of the fruits. However, allometric equations …