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 5 of 5 for “"food level"”.
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Experimental studies on the reproductive biology of the Waterstrider, Gerris buenoi (Heteroptera: Gerridae)
… waterstrider Gerris buenoi, I demonstrated that food resources were limited by both intra- and interspecific competition in the field. Over a 20 fold range of egg production rates in control enclosures, food addition and interspecific competitor exclusion consistently increased egg production. …
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The Effect of Turbidity on the Distribution and Life History of River Zooplankton
… two Daphnia species in response to turbidity and food levels. Over a three-day period in summer 1996, I sampled 12 sites in the Illinois River and associated backwaters and wetlands to determine community composition and environmental variables. Rotifers were the most widespread and abundant, …
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Effects of the Exotic Cladoceran Daphnia Lumholtzi (Sars) on the Growth Rate and Prey Selection of Bluegill Sunfish (Lepomis Macrochirus Rafinesque)
… lumholtzi invaded vs. native zooplankton) and food abundance on the survivorship and growth of three size classes of bluegill sunfish (15-25, 30-40, and 50-60 mm). Prey selectivity values also were determined for each of the zooplankton species from the exotic community type for each of the …
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Extracting phycocyanin from spirulina and hydrothermal liquefaction of its residues to produce bio-crude oil
… process for extraction and purification of food-level C-PC from spirulina platensis was developed in this study. The process conditions include: 1) freeze the spirulina 3 hours to extract the crude protein; 2) add 80 g/L (w/v) activated carbon to the crude extract; 3) use a vacuum filter …