A5043790424- Marine and fisheries research
- Fish Ecology and Management Studies
- Avian ecology and behavior
- Marine animal studies overview
- Isotope Analysis in Ecology
- Marine Bivalve and Aquaculture Studies
- Marine and coastal plant biology
- Animal Behavior and Reproduction
- Wildlife Ecology and Conservation
- Coral and Marine Ecosystems Studies
- Fish Biology and Ecology Studies
- Arctic and Antarctic ice dynamics
- Animal Ecology and Behavior Studies
- Aquatic Invertebrate Ecology and Behavior
- Animal Vocal Communication and Behavior
- Climate variability and models
- Genetic and phenotypic traits in livestock
- Ecology and biodiversity studies
- Underwater Acoustics Research
- Genetic diversity and population structure
- Fire effects on ecosystems
- Cryospheric studies and observations
- Mercury impact and mitigation studies
- Reproductive biology and impacts on aquatic species
- Rangeland and Wildlife Management
University of Manitoba
2016-2025
University of New Brunswick
2022
Carleton University
2007-2010
Environment and Climate Change Canada
2009-2010
Memorial University of Newfoundland
2001-2009
University of Victoria
1999
1 We studied chick diet in a known-age, sexed population of long-lived seabird, the Brünnich's guillemot (Uria lomvia), over 15 years (N = 136; 1993–2007) and attached time–depth–temperature recorders to examine foraging behaviour multiple 36; 2004–07). 2 Adults showed specialization prey fed offspring, described by indices calculated years: 27% diversity was attributable among-individual variation (within-individual component total niche width 0·73); average similarity an individual's...
Flight is a key adaptive trait. Despite its advantages, flight has been lost in several groups of birds, notably among seabirds, where flightlessness evolved independently at least five lineages. One hypothesis for the loss seabirds that animals moving between different media face tradeoffs maximizing function one medium relative to other. In particular, biomechanical models energy costs during flying and diving suggest wing designed optimal performance should lead enormous when air. Costs...
Breeding seabirds are extreme central-place foragers, commuting long distances between colonies and feeding areas. Central-place foraging theory predicts that prey items close to the colony will be preferred over distant from colony, which can lead depletion near ("Storer-Ashmole's halo"). To investigate relevance of these ideas a single-prey loader, we equipped chick-rearing Thick-billed Murres (Uria lomvia) with time—depth recorders (1999–2007) monitored deliveries (1993–2008). Because...
We explored foraging strategies used by marine animals to search for prey examining the relative importance of information exchange and memory in a cold ocean environment from 1998 2000. Recent technological advances have increased our knowledge patterns predators, but few these studies concurrently measured distribution behavior. quantified arrival departure behavior pursuit-diving, colonial seabird, Common Murre, Uria aalge, at two colonies on eastern Newfoundland Shelf through...
Systematic monitoring of seabird populations in Canada has been ongoing since the 1920s and diets other biological indicators ecosystem change started 1970s. Long-term population parameters began 1980s. These studies originally were conducted mainly by Canadian Wildlife Service, but subsequently have involved several universities nongovernment organization groups. We review results this from 1970s onwards for six oceanographic regions to assess trends among seabirds correlated diets,...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 415:295-304 (2010) - DOI: https://doi.org/10.3354/meps08752 Crepuscular foraging by a pursuit-diving seabird: tactics of common murres in response diel vertical migration capelin P. M. Regular1,*, G. K. Davoren2, A. Hedd1, W. Montevecchi1 1Cognitive and Behavioural Program, Memorial University, St. John's,...
We report on inter‐annual comparisons of the foraging behavior Global Positioning System–equipped chick‐rearing northern gannets ( Morus bassanus ) in western Atlantic during years with contrasting oceanographic and prey conditions. hypothesized that predators would modify their tactics when small fishes (capelin [ Mallotus villosus ]) large pelagic (mackerel, saury) varied abundances. predicted differences (1) diving behavior, (2) spatial, (3) temporal patterning behavior. Predictions 1 2...
We examine the provisioning constraints of a pursuit‐diving seabird in cold ocean regime by comparing behaviour common murres Uria aalge rearing chicks at two colonies Northwest Atlantic during 1998‐2000. Funk Island is largest (340,000–400,000 breeding pairs) and most offshore (60 km) colony eastern Canada. Seventy‐five percent population breeds on this island. Great one island within Witless Bay Ecological Reserve, which second aggregation (100 000 located near‐shore (2 km). The primary...
We investigated shoals of capelin (Mallotus villosus), the focal forage fish species in Northwest Atlantic, nearshore Newfoundland during spawning (20002003). Large maturing were observed warm (>0 °C), deep (>240 m) water. Smaller located two specific areas closer to shore shallower water (100150 m). Shoals persisted these staging all years and moved into surface dark but remained cold (<0 °C) daylight. These diel vertical movement patterns may reflect a trade-off between growth...
Abstract: Marine biological hotspots, or areas where high abundances of species overlap in space and time, are ecologically important because energy flow through marine food webs, a key ecosystem process, is maximized these areas. I investigated whether top predators aggregated at persistent spawning sites forage fish species, capelin (Mallotus villosus), on the NE coast Newfoundland during July August 2000–2003. By examining distributional patterns ship‐based surveys multiple spatial...
We used time–depth recorders to investigate the behaviour of free-ranging Thick-billed Murres ( Uria lomvia L., 1758) after attaching positively (n = 9), negatively 10), or neutrally 9) buoyant handicaps and increasing cross-sectional area by 3% (2.8 cm 2 ; n 8) 6% (5.6 6). When buoyancy was altered drag increased, murres reduced dive depth duration, suggesting that do not manipulate obtain neutral during bottom phase. Ascent rate increased as bird surfaced mean ascent for deeper dives,...
Abstract Personality traits have been identified in many animals but species that are hard to observe the wild present unique challenges. We aimed determine an appropriate method for identifying docility a crevice-nesting seabird (razorbill, Alca torda ) by conducting three tests associated with this trait. Two used quantitative behavioural coding (crevice extraction, restraint), while other qualitative observer ratings (routine handling). Chick-rearing razorbills ( Newfoundland, Canada were...
The Grand Bank ecosystem has undergone significant shifts during the past two decades owing to oceanographic and fishing effects. Effects on upper trophic level seabirds (dietary shifts, reduced reproductive performance) have been mediated through changes in biology behaviour of capelin ( Mallotus villosus (Müller, 1776)), focal forage species. To explore for effects at lower levels, we combine dietary (1987–1988, 2003–2006) distributional (1966–1990, 1998–1999) data Leach’s storm-petrel...