A5103145883- Marine animal studies overview
- Marine and fisheries research
- Animal Behavior and Reproduction
- Avian ecology and behavior
- Arctic and Antarctic ice dynamics
- Animal Vocal Communication and Behavior
- Marine Bivalve and Aquaculture Studies
- Immune Response and Inflammation
- Influenza Virus Research Studies
- Coral and Marine Ecosystems Studies
- Underwater Acoustics Research
- Respiratory viral infections research
- Neuroendocrine regulation and behavior
- Wildlife Ecology and Conservation
- Evolutionary Psychology and Human Behavior
- Indigenous Studies and Ecology
- Arctic and Russian Policy Studies
Dalhousie University
2012-2024
Fisheries and Oceans Canada
2020-2024
Bedford Institute of Oceanography
2020-2023
La Rochelle Université
2004
Smithsonian Conservation Biology Institute
2001-2004
Smithsonian Institution
2001-2004
National Zoological Park
2004
Abstract Culling is widely practised as a means to reduce predation effects of terrestrial carnivores, birds and marine mammals in many parts the world. Of mammals, coastal pinniped species have usually been target culling programs, but dolphins large odontocete also culled. We reviewed published literature on mammal programs evaluate extent their efficacy fisheries management measure. Changes species' distributions abundance demonstrate that can be very effective at reducing predator...
Influenza A virus (IAV) has been associated with multiple unusual mortality events (UMEs) in North Atlantic pinnipeds, frequently attributed to spillover of from wild-bird reservoirs. To determine if endemic infection persists outside UMEs, we undertook a multiyear investigation IAV healthy, live-captured Northwest gray seals (Halichoerus grypus). From 2013 2015, sampled 345 pups and 57 adults Cape Cod, MA, USA Nova Scotia, Canada consistently detecting across all groups. There was an...
The purpose of this study was to examine the importance body size and composition as determinants conditional mating tactics exhibited in male grey seals. We combined behavioral observations with measures energy expenditure success on 42 known-age individuals during breeding seasons 1997–2001 at Sable Island, Canada. Males a large mass arrived grounds more fat catabolized less protein than smaller males. consumed 1.9 6 0.2 MJ day � 1 , those percentage had higher rates food intake. amount...
Abstract Studies using molecular markers have shown that some grey seal males may be gaining success through exhibiting alternative mating tactics. We estimated the probability of fertilization primary tactic female defence and one with departing females on Sable Island, Nova Scotia, Canada, during breeding seasons 1997–2002. Although rate (27–43%) was greater than (10–12%), these low rates indicate potential fitness value tactics in this size‐dimorphic pinniped species.
Abstract Background The distribution of prey in the ocean is spatially and temporally patchy. How predators respond to this patchiness may have consequences on their foraging success, thus physical condition. recent ability record fine-scale movements marine animals combined with novel home-range analyses that incorporate dimension time should permit a better understanding how individuals utilise different regions space success. Methods Over six-year study, we used T-LoCoH (Time-Local Convex...
Abstract Studies of the grey seal Halichoerus grypus mating system, using focal animal sampling constrained by study site location and size, limit measurement variation in male tactics success. Using this method, males have been classified as either ‘tenured’ or ‘transient’. Preliminary evidence is presented wider success mobile focal‐animal techniques that are not site, effects age on behaviour when accounting for body mass. The was conducted during breeding seasons 1997 1998 at Sable...
We examined age-related changes and consistency in physical behavioural traits of 20 male grey seals ( Halichoerus grypus (Fabricius, 1791)) implications for a proxy mating success (number oestrous females attended) over four successive breeding seasons on Sable Island, Canada. Across the study, young males (10–15 years) gained body mass, while old (23–31 lost mass. Body length was an important determinant tenure (time spent at site among females) all ages exhibited high level duration (r =...
Abstract Change in breeding phenology is often a response to environmental forcing, but less known of the mechanism underlying such changes and their fitness consequences. Here, we report on from 27‐year longitudinal study (1991–2017) individually marked, known‐aged grey seals ( Halichoerus grypus ) Sable Island, Nova Scotia, Canada. We used generalized linear mixed models 3‐step process develop model that includes interactions between intrinsic extrinsic covariates test hypotheses about...
Abstract Few studies have examined the impacts of externally fitted data‐loggers and telemetry tags on pinnipeds. We tested for instrument effects body mass lactating female gray seals their offspring probability pupping in next breeding season. Known‐age adult females ( n = 216) were with instruments winter, spring, fall from 1992 to 2018 at Sable Island, Nova Scotia. Of those tagged spring fall, 61 135 returning 59 weighed within 5 days postpartum 79 pups weaning. Instrumented assigned...
The heterogeneous oceanographic conditions of continental shelf ecosystems result in a three-dimensionally patchy distribution prey available to upper-trophic level predators. association bio-physical with movement patterns large marine predators has been demonstrated diverse taxa. However, obtaining subsurface data that are spatio-temporally relevant the decisions made by benthically-foraging species can be challenging.Between 2009 and 2015, grey seals were captured on Sable Island, Nova...
We examined the diving behaviour of breeding male grey seals (Halichoerus grypus) at Sable Island, Nova Scotia, from 1997 to 2001. The proportion time spent sea varied between 0 and 78% (N = 30). Males engaged in deep (43.4 ± 3.3 m (mean SE), N 27) diving, these dives were clustered into bouts, which mostly occurred during long trips (62.2 14.7 h). suggest that males foraging dives. Shallow (5.9 0.1 m, accounted for 40.8% dives, also bouts short (2.1 0.37 shallow comprised a suite...
Most vertebrate offspring must transition from the relative security of parental care (nutrition and protection) to independent foraging. Offspring face many challenges during this critical period, particularly in species where ends at weaning, such as grey seal ( Halichoerus grypus ). We studied development movement behaviour naïve pups their first trips sea about five months age. Twenty-five (12 males 13 females) newly-weaned were fitted with satellite-linked GPS tags on Sable Island, Nova...
Click to increase image sizeClick decrease size Acknowledgments Authors listed alphabetically. This research was supported by the Ocean Tracking Network (OTN) through a network project grant (NETGP #375118-08) from Canada Natural Sciences and Engineering Research Council (NSERC) with additional support Canadian Foundation for Innovation (CFI, Project #13011), Social Humanities (SSHRC #871-2009-0001). The authors gratefully acknowledge review comments Richard Apostle, Sara Iverson, Don Bowen...
Apres deux ans d'enquete on a pu estimer le statut des populations de phoques gris sur les cotes est et sud-est l'Irlande, recenser type d'habitat qu'ils utilisent. Les observations ont ete centrees autour lieux reproduction connus l'ile Lambay la cote orientale Grande Saltee sud-est, au cours saisons 1997 1998. Une technique comptage standard utilisee pour production mortalite jeunes. estimations faites d'apres totale jeunes, en utilisant donnees table qui concerne phoque gris. La jeunes...