Browsing Biology by Title
Now showing items 1-20 of 228
-
Acoustical features of song categories of the Adelaide's warbler (Dendroica adelaidae)
(1996)I identified acoustical features that distinguish the two song categories, A and B, of the Adelaide';s Warbler (Dendroica adelaidae). Like many other wood-warbler species, male Adelaide';s Warblers have functionally ... -
Adaptive Value and Costs of Physiological Plasticity to Soil Moisture Limitation in Recombinant Inbred Lines of Avena barbata
(2010-02)Costs are hypothesized to constrain the evolution of adaptive phenotypic plasticity, but they have been difficult to quantify because strong selection should eliminate costly genotypes from natural populations. However, ... -
Aggressive nest intrusions by male Humboldt Penguins
(2001-02)During observations at a breeding colony of Humboldt Penguins (Spheniscus humboldti), we noted five male penguins enter nests occupied by breeding pairs and engage in aggressive interactions with the resident adult. These ... -
Analysis of animal movement using opportunistic individual identifications: Application to sperm whales
(2001-05)Data sets in which animals are identified individually in different places and times may contain considerable information on movements. However, if the probability that an animal is reidentified depends on its movement ... -
Animal-Borne Acoustic Transceivers Reveal Patterns of at-Sea Associations in an Upper-Trophic Level Predator
(2012-11)Satellite telemetry data have substantially increased our understanding of habitat use and foraging behaviour of upper-trophic marine predators, but fall short of providing an understanding of their social behaviour. We ... -
Assessing the Value of Recreational Divers for Censusing Elasmobranchs
(2011-10)Background: Around the world, researchers are using the observations and experiences of citizens to describe patterns in animal populations. This data is often collected via ongoing sampling or by synthesizing past ... -
Avoidance of fisheries-induced evolution: management implications for catch selectivity and limit reference points
(2009-08)I examined how the fitness (r) associated with early-and late-maturing genotypes varies with fishing mortality (F) and age-/size-specific probability of capture. Life-history data on Newfoundland's northern Atlantic cod ... -
Behavioral reactions of northern bottlenose whales (Hyperoodon ampullatus) to biopsy darting and tag attachment procedures
(2001-04)The effects of invasive or intrusive research techniques need to be thoroughly documented in order to satisfy appropriate standards of animal care. How cetaceans react to either biopsy darting ol tag attachment procedures ... -
Behaviour of sea urchin Strongylocentrotus droebachiensis grazing fronts: food-mediated aggregation and density-dependent facilitation
(2007)The occurrence of destructive grazing fronts is a common phenomenon in sea urchins, but mechanisms governing front formation and dynamics remain poorly understood. We experimentally examined the effect of kelp biomass ... -
The Biodiversity of the Mediterranean Sea: Estimates, Patterns, and Threats
(2010-08)The Mediterranean Sea is a marine biodiversity hot spot. Here we combined an extensive literature analysis with expert opinions to update publicly available estimates of major taxa in this marine ecosystem and to revise ... -
Biological husbandry and the "nitrogen problem"
(Biological Agriculture and Horticulture, 1986)Since 1978, the author has been conducting research into the theory and practice of biological husbandry in collaboration with a farmer who stopped using pesticides and mineral fertilizers in 1976. Eggs are exported from ... -
Body condition at weaning affects the duration of the postweaning fast in gray seal pups (Halichoerus grypus)
(2008-05)Gray seals (Halichoerus grypus) undergo a terrestrial postweaning fast (PWF) that depletes energy reserves acquired during the suckling interval. Plasticity in PWF duration may ensure that pups of variable body condition ... -
Both Geography and Ecology Contribute to Mating Isolation in Guppies
(2010-12)Local adaptation to different environments can promote mating isolation - either as an incidental by-product of trait divergence, or as a result of selection to avoid maladaptive mating. Numerous recent empirical examples ... -
Breeding Bird Surveys at Alexandra Fiord, Ellesmere Island, Nunavut (1980-2008)
(2010-09)Long-term monitoring of bird populations in the Arctic is of considerable interest as this area is experiencing rapid climate warming; however, multi-decadal studies in the Canadian High Arctic are rare. Over five summers ... -
The burrow microhabitat of the land crab Cardisoma guanhumi: Respiratory/ionic conditions and physiological responses of crabs to hypercapnia
(1993)Cardisoma guanhumi in Puerto Rico spend much of the dry season in burrows that descend to groundwater. Burrows are sometimes 3-4 m deep and may be capped with dried mud for over 3 mo. Samples of gas and water from burrows ... -
Can SINEs: A family of tRNA-derived retroposons specific to the superfamily canoidea
(1994)A repetitive element of approximately 200 bp was cloned from harbour seal (Phoca vitulina concolour) genomic DNA. The sequence of the element revealed putative RNA polymerase III control boxes, a poly A tail and direct ... -
Can we stop the lobster going the way of the cod?
(labeled ‘A brief submitted in 2006 to the Fisheries Resource Conservation Council (FRCC)’, 2006)This report is a response to the Fisheries Resource Conservation Council (FRCC)’s request for opinion on how to reduce risk and address problems in Atlantic Canada’s lobster fishery. See www.frcc-ccrh.ca for further details ... -
Canadian Integrated Ocean Observing System Investigative Evaluations: Observations and Data
(2017-11-30)Many countries have employed a coordinated network of government agencies, research institutions, and private companies to establish national integrated Ocean Observing Systems (OOSes). Although Canada boasts a robust and ... -
CBOL Protist Working Group: Barcoding Eukaryotic Richness beyond the Animal, Plant, and Fungal Kingdoms
(2012-11)No abstract available. -