Global ETD Search

41	Influence of physico-chemical factors on the distribution and biomass of invasive mussels in the St. Lawrence River Jones, Lisa A., 1976- January 2005 (has links) No description available.
42	Landscape history, dispersal, and the genetic structure of amphibian populations Meyer, Shavonne. January 2007 (has links) No description available.
43	High frequency internal waves in the St. Lawrence estuary Deguise, Jean-Claude January 1977 (has links) No description available. Internal waves. Estuaries -- Saint Lawrence River.
44	Sewage and the ecology of the St. Lawrence River DeBruyn, Adrian M. H. January 2001 (has links) No description available. Stream ecology -- Saint Lawrence River.
45	The role of the zebra mussel (Dreissena polymorpha) in structuring benthic macroinvertebrate communities in the St. Lawrence River / Ricciardi, Anthony. January 1996 (has links) No description available. Unionidae -- Saint Lawrence River. Zebra mussel -- Saint Lawrence River.
46	Spatial distribution of rorqual whales in the Strait of Jacques Cartier, Gulf of St. Lawrence, Quebec, Canada Doniol-Valcroze, Thomas. January 2001 (has links) The spatial distribution of four species of rorqual whales was studied along the north shore of the Gulf of St. Lawrence during the months of June to October from 1989 to 2000. A research effort of 6511 hours at sea yielded 849 sightings of blue whales (Balaenoptera musculus), 5291 of finback whales (Balaenoptera physalus), 3822 of humpback whales (Megaptera novaeangliae) and 6489 of minke whales (Balaenoptera acutorostrata). Spatial and behavioural data were collected at sea using inflatable boats, and Global Positioning Systems (GPS) were used to obtain accurate positions. These data were plotted and analysed using a Geographic Information System (GIS) to test the hypotheses that patterns of distribution were not random, were associated with bathymetry and reflected specific differences in habitat use. The resulting maps illustrated the clustered distribution of rorqual whales linked to sea-bottom topography, probably associated with areas of local upwelling and increased productivity. Blue and fin whales shared almost the same distribution, humpback whales were found in slightly deeper, offshore waters whereas minke whales were more abundant in shallower waters. Little attention has been given until now to local patterns of distribution in the area and such information can be useful for practical management considerations. The results emphasise the importance of scale in ecological studies of marine mammals and the need for further research using additional oceanographic parameters, in order to better understand habitat selection.
47	Some aspects of the biology of Parathemisto (Amphipoda: hyperiidea) from the Gulf of St. Lawrence. Hoffer, Susan Ann January 1971 (has links) No description available. Parathemisto. Amphipoda. Crustacea -- Saint Lawrence River.
48	High frequency internal waves in the St. Lawrence estuary Deguise, Jean-Claude January 1977 (has links) No description available. Internal waves. Estuaries -- Saint Lawrence River.
49	Spring diatom communities of the St. Lawrence River Vickers, Gloria. January 1980 (has links) No description available.
50	Landscape history, dispersal, and the genetic structure of amphibian populations Meyer, Shavonne. January 2007 (has links) Habitat fragmentation can influence the genetics of a population through the direct loss of genetic diversity, and by the genetic processes that occur as a result of small remnant populations or the geographic isolation of populations. I examined the population genetics of two woodland amphibian species in localities with different land-use histories. The wood frog (Rana sylvatica) and the red-backed salamander (Plethodon cinereus) use the same general habitat but differ with respect to a few key life-history characteristics relating to dispersal. I then compared between species the relative influence each land-use scenario had on the population genetic structure. I found that habitat fragmentation affected the population genetics of the two amphibians and did so differently for each species. The differential population genetic response of these two amphibians to habitat fragmentation reinforces the important role of life-history characteristics in how the genetic structure of a population is shaped over time.

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