Global ETD Search

31	Mitochondrial adaptive change and a CAPr-correlated polymorphism in toxin-selected Brachionus plicatilis rotifers Dornhoff, Sharon Lee 01 January 2001 (has links) To determine whether metazoan mitochondria retain the capacity to evolve on their own in response to selection pressure, I conducted an eight-month selection experiment on six populations of the monogonont rotifer Brachionus plicatilis. Rotifers were cultivated in brine shrimp hatchers under constant light, and were periodically exposed to the protein synthesis inhibitors chloramphenicol or cycloheximide. I uncoupled mitochondrial from recombinant chromosomal heredity in the test populations, either by destroying resting eggs to isolate mtDNA within all-clone lineages, or by restricting chemical exposure to males to halt mtDNA transmission to offspring. Rotifers' tolerance for toxins was tested after 10, 23, and 30 exposures; partial mitochondrial 16S rRNA gene sequences were also obtained from rotifer populations after 30 treatments. A novel genetic polymorphism that correlated with an increase in chloramphenicol resistance in the CAP-treated asexual B. plicatilis population was noted. Other toxin-treated rotifer populations' gene sequences exhibited no such increase in frequency for mitochondrial variants, even in cases where a population's resistance to toxins did improve. This is consistent with my hypothesis that asexual rotifers' mitochondria would adapt to the CAP antibiotic most easily, whereas the males-only treatment groups' chromosomes would adapt more easily to the cytoplasmic toxin cycloheximide.
32	The aquatic botany of Cranberry Pond Hodge, W. H. 01 January 1936 (has links) (PDF) No description available. Aquatic plants Freshwater ecology Ecology
33	Predicting the Potential Distribution of Two Threatened Stream Fish Species in Northeast Ohio Pinkerton, Jeramy John 21 September 2016 (has links) No description available. Ecology Environmental Science Freshwater Ecology
34	Some observations on the animal ecology of Molson’s Creek. Lead, Henry Dickinson. January 1937 (has links) No description available. Freshwater ecology. Zoology. Animal ecology.
35	Macrophytes as fish habitat : the role of macrophyte morphology and bed complexity in fish species distributions / Carden, Kerilynn M. January 2002 (has links) (PDF) Thesis (M.S)--University of Wisconsin--Stevens Point, 2002. / Includes bibliographical references (leaves 102-110).
36	Net ecosystem metabolism in Texas shallow water estuaries: an indicator of freshwater inflow effects, scales of variability, and changes due to climate change and watershed development Russell, Marc James 28 August 2008 (has links) Not available / text Estuarine ecology--Texas Freshwater ecology--Texas
37	THE ECOLOGY OF A DOMINANT EMERGENT (TYPHA LATIFOLIA) IN A RESERVOIR Hallock, Robert James, 1943- January 1973 (has links) No description available. Typha latifolia. Freshwater ecology. Imperial Reservoir (Ariz.)
38	Propagation for the conservation and applied use of freshwater mussels Barclay, Holly January 2012 (has links) No description available. 590
39	The effects of watershed alterations on macroinvertibrate colonization and community development Stites, David Linthicum 08 1900 (has links) No description available. Limnology Freshwater microbiology Freshwater invertebrates Freshwater ecology
40	Interactions between bacteria and fungi on aquatic detritus - causes and consequences / Mille-Lindblom, Cecilia, January 2005 (has links) Diss. (sammanfattning) Uppsala : Uppsala universitet, 2005. / Härtill 6 uppsatser.

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