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Now showing items 11-20 of 212
The relationship between offspring size and fitness: integrating theory and empiricism
(2013-02)
How parents divide the energy available for reproduction between size and number of offspring
has a profound effect on parental reproductive success. Theory indicates that the relationship
between offspring size and ...
Historical changes in genotypic frequencies at the Pantophysin locus in Atlantic cod (Gadus morhua) in Icelandic waters: evidence of fisheries-induced selection?
(2011-07)
The intense fishing mortality imposed on Atlantic cod in Icelandic waters during recent decades has resulted in marked changes in stock abundance, as well as in age and size composition. Using a molecular marker known to ...
Food-Web Structure of Seagrass Communities across Different Spatial Scales and Human Impacts
(2011-07)
Seagrass beds provide important habitat for a wide range of marine species but are threatened by multiple human impacts in coastal waters. Although seagrass communities have been well-studied in the field, a quantification ...
Contemporary effective population and metapopulation size (Ne and meta-Ne): comparison among three salmonids inhabiting a fragmented system and differing in gene flow and its asymmetries
(2013-03)
We estimated local and metapopulation effective sizes ((N) over cap (e) and meta-(N) over cap (e)) for three coexisting salmonid species (Salmo salar, Salvelinus fontinalis, Salvelinus alpinus) inhabiting a freshwater ...
Maintenance of Positive Diversity-Stability Relations along a Gradient of Environmental Stress
(2010-04)
Background: Environmental stress is widely considered to be an important factor in regulating whether changes in diversity will affect the functioning and stability of ecological communities. Methodology/Principal Findings: ...
Killer storms: North Atlantic hurricanes and disease outbreaks in sea urchins
(2010-11)
An increase in the incidence of disease in various marine organisms over the past few decades
has been linked to ocean climate change. In Nova Scotia, Canada, mass mortalities of sea urchins,
due to an amoebic disease, ...
Reciprocal Subsidies and Food Web Pathways Leading to Chum Salmon Fry in a Temperate Marine-Terrestrial Ecotone
(2010-04)
Stable isotope analysis was used to determine the relative proportions of terrestrial and marine subsidies of carbon to invertebrates along a tidal gradient (low-intertidal, mid-intertidal, high-intertidal, supralittoral) ...
Nonbreeding-Season Drivers of Population Dynamics in Seasonal Migrants: Conservation Parallels Across Taxa
(2009-12)
For seasonal migrants, logistical constraints have often limited conservation efforts to improving survival and reproduction during the breeding season only. Yet, mounting empirical evidence suggests that events occurring ...
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 ...
How quality of host plant affects a predator-prey interaction in biological control
(1995)
In cases of successful biological control the pest population is maintained at low densities by a natural enemy, but the mechanisms by which the predator or parasitoid manages to control the pest are often unknown. This ...