Browsing Biology by Title
Now showing items 194-213 of 228
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Sex-specific, seasonal foraging tactics of adult grey seals (Halichoerus grypus) revealed by state-space analysis
(2009-11)In many large pelagic animals, observing behavior is limited to observation by radio or satellite telemetry. In many cases, discriminating different behaviors from telemetry data has been a key, but often elusive, goal. ... -
Some notes on the Aristotelian origin of the distinction between a falsificationist's and verificationist's view of science: together with corrections to my earlier account
(2012-10-31)It has not always been realised that Karl Popper's analytic distinction between the logically stronger falsificationist's view of science and the logically weaker verificationist's and inductivist's view of science is a ... -
The sound management of a fishery as a social engineering: applying Karl Popper's demarcation criterion to an Area 2 stock of Pacific halibut
(2014-10-23)The Newfoundland fishery for Atlantic cod was once the largest cod fishery in the World. In the early 1990s this fishery formed part of an Atlantic Canadian groundfish fishery collapse that has become one of the World's ... -
Spatial and Temporal Variability of Macrobenthic Communities in Tidepools on a Rocky Shore in Nova-Scotia, Canada
(1994-02)Spatial and temporal patterns in the distribution and abundance of macroalgae and macrofauna were measured in 4 pools in each of 3 intertidal zones (mid, high and splash) on a rocky shore near Halifax, Nova Scotia, Canada. ... -
Spatial and temporal variability of patterns of colonization by mussels (Mytilus trossulus, M-edulis) on a wave-exposed rocky shore
(1998)Colonization rates of mussels (Mytilus trossulus and M. edulis) were measured on natural substrata in tidepools and on emergent rock in recently ice-scoured and non-scoured regions of a rocky shore near Halifax, Nova ... -
Spatial and Temporal Variability of Tidepool Hyperbenthos on a Rocky Shore in Nova-Scotia, Canada
(1994-05)We examined the distribution and abundance of the hyperbenthos in tidepools on a rocky shore, near Halifax, Nova Scotia, Canada, at approximately monthly intervals between March and November 1991, and between April and ... -
Spatial and temporal variation in DMSP content in the invasive seaweed Codium fragile ssp fragile: effects of temperature, light and grazing
(2010)The methionine-derived secondary metabolite dimethylsulfoniopropionate (DMSP) is believed to function in cryoprotection, defense against herbivory, and reduction of oxidative stress in some seaweeds. The ability to produce ... -
Spatial dynamics, ecological thresholds and phase shifts: modelling grazer aggregation and gap formation in kelp beds
(2010)On the Atlantic coast of Nova Scotia, transitions between alternative states of the subtidal ecosystem, kelp beds and sea urchin barrens, occur on a decadal scale. To explore the process of urchin aggregation within kelp ... -
Spatial heterogeneity of phytoplankton assemblages in tidepools: Effects of abiotic and biotic factors
(1996-01)In any ecological system, the factors that regulate the abundance of species vary with spatial scale; therefore, the sources of spatial variability should be described. We examined different sources of variability in the ... -
Spatiotemporal Patterns in Nest Box Occupancy by Tree Swallows Across North America
(2012-06)Data from the North American Breeding Bird Survey (BBS) suggest that populations of aerial insectivorous birds are declining, particularly in northeastern regions of the continent, and particularly since the mid-1980s. ... -
The State-Spaced Integrated assessment model for Newfoundland's 'northern cod' as a stock assessment model that fails to distinguish between normative and natural laws
(2018-02-06)Stock assessment models for Atlantic Canada's groundfish fisheries such as Noel Cadigan's recent State-Spaced Integrated assessment model for Newfoundland's 'northern cod' involve single premised inductive arguments that ... -
Strong bottom-up and top-down control of early life stages of macroalgae
(2001-06)In contrast to most pelagic primary producers, benthic macrophytes pass through morphologically distinct life stages, which can be subject to different ecological controls. Using factorial field experiments, we investigated ... -
Structure and Dynamics of Epifaunal Assemblages on Intertidal Macroalgae Ascophyllum-Nodosum and Fucus-Vesiculosus in Nova-Scotia, Canada
(1987-05)No abstract available. -
Structure and dynamics of mussel patches in tidepools on a rocky shore in Nova Scotia, Canada
(1995)The distribution, size structure, and dynamics of mussel (Mytilus trossulus, M. edulis) patches in tidepools were studied on an exposed rocky shore near Halifax, Nova Scotia, Canada. The mussel patches were dynamic, ... -
Survey of Vegetated Areas and Musk-Ox Populations in East-Central Ellesmere Island
(1986-03)No abstract available. -
Survival analysis of tethered juvenile sea scallops Placopecten magellanicus in field experiments: Effects of predators, scallop size and density, site and season
(1994)The impact of predation on survival of juvenile sea scallops Placopecten magellanicus has important implications for the population dynamics and aquaculture of this species. In field experiments using tethered juvenile ... -
Surviving historical Patagonian landscapes and climate: molecular insights from Galaxias maculatus
(2010-03)Background: The dynamic geological and climatic histories of temperate South America have played important roles in shaping the contemporary distributions and genetic diversity of endemic freshwater species. We use ... -
Symmetry, change, perturbation, and observing mode in natural communities
(1986)Like a kaleidoscope, nature presents continuously fleeting images of natural communities. It has been difficult to discern patterns of community structure in these elusive images. For both theoretical and applied considerations, ... -
Synchronized hatch and its ecological significance in rainbow smelt Osmerus mordax in St. Mary's Bay, Newfoundland
(2004-11)Early life history stages in most marine animals are subject to high mortality through predation, starvation, and dispersal. Accordingly, the potential exists for the selection of behavioral mechanisms that reduce ... -
Systems for sustainable agriculture: approaches, tradeoffs and needs
(Canadian Centre for Sustainable Agriculture, Saskatoon, Saskatchewan, 2001)All systems of agriculture practiced today can be seen as having a potential for improvement and contributing toward a more sustainable agriculture. The major differences in approach and in the types of services needed to ...