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Now showing items 11-20 of 76
A lacustrine sediment record of the last three interglacial periods from Clyde Foreland, Baffin Island, Nunavut: biological indicators from the past 200,000 years
(2009-05-06)
The study of long-term climatic change in the Arctic, a region both particularly sensitive to the effects of a warming climate and an important driver of global climate, is pertinent to understanding the rates and magnitude ...
Delayed maturation of secondary sexual signals in first-year male American redstarts
(2009-09-26)
Male birds of many species use conspicuous song and plumage displays in both courtship and territorial interactions. In some species, one or both of these signalling traits may not reach full adult maturity until a male’s ...
Infant-directed behaviour in the naturally paternal male dwarf hamster, Phodopus campbelli, is neither activationally nor organizationally regulated by activity at the progesterone receptor
(2009-09-04)
Phodopus campbelli is a naturally biparental dwarf hamster with males so paternal they will act as midwives during the birth of their litter. The hormonal regulation of parental behaviour has been well established in many ...
Integrating theory and experimentation in the study of malaria
(2009-08-25)
Malaria poses a serious threat to much of the developing world and an enormous effort is under way to design vaccines and other novel interventions. Nevertheless, we understand very little about the ecology and evolution ...
Toxicity of Chemically Dispersed Crude Oil to Early Life Stages of Atlantic Herring (Clupea Harengus)
(2009-04-28)
To minimize the damage caused by oil spills, responders may chemically disperse floating oil into the underlying water before it contacts shorelines and wildlife. Quantifying this strategy’s net ecological and commercial ...
The Utility of DNA Microsatellite Markers in Conservation of a Namibian Population of the Black Rhinoceros (Diceros Bicornis)
(2009-06-01)
Massive declines in the latter half of the 20th century left black rhinoceros populations perilously close to extinction with only approximately 3600 individuals remaining, in contrast to estimated census numbers of over ...
The Calmodulin-Like Protein CML42 is Involved in Trichome Branching in Arabidopsis
(2009-09-16)
The Snedden lab has been studying a family of Ca2+-binding proteins from Arabidopsis that are related to the prototypical Ca2+ sensor calmodulin (CaM) and are termed CMLs (CaM-like proteins). Previous work on CML42 ...
Assessment of Long-Term Changes in Water Quality from Halifax Region Lakes (Nova Scotia, Canada) Using Paleolimnological Techniques
(2009-09-10)
The current study developed a paleolimnological approach to assess changes in diatom assemblages (class Bacillariophyceae) from present-day lake sediments in comparison to those deposited before significant human impact ...
Stress responses in an outbred, wild-derived hamster, Phodopus campbelli: Individuality in the cortisol response to acute restraint stress and the absence of strong association with behavioural responses to acute restraint
(2009-02-11)
Glucocorticoid reactivity is often used as a biomarker of emotional stress status in animals and man. Likewise, behavioural responses of individuals to standardized stresses are also widely used to assess the magnitude of ...
Paleolimnological assessment of Holocene climatic and environmental change in two lakes located in different regions of the Canadian Arctic tundra
(2008-11-12)
Paleoclimatic research in the Canadian Arctic has increased in recent decades; however, there is still much to learn about the nature and extent of past climate change in this vast, environmentally sensitive region. This ...