It is critical to observe how mobile predators respond to such bottom-up ecosystem changes driven by altered circulation patterns. For example, the weakening of the AMOC has been associated with a northward shift in the warm Gulf Stream and subsequent reduction in copepod biomass indices in the Gulf of Maine ( Meyer-Gutbrod et al., 2021). Processes that alter circulation patterns can have downstream impacts on foraging resources for predators, such as fish and whales ( Greene et al., 2003 Greene et al., 2013 Meyer-Gutbrod and Greene, 2017 Meyer-Gutbrod et al., 2021). In the Northern Hemisphere, large-scale climate variations have been associated with the weakening of the Atlantic Meridional Overturning Circulation (AMOC), a regional circulation system characterized by the northward flow of warm, saline water and the southward flow of cool water that has an important role in global thermohaline circulation ( Saba et al., 2016 Caesar et al., 2018 Smeed et al., 2018). Unprecedented shifts in the distribution of marine species in response to climate change are increasingly being identified around the world ( Perry et al., 2005 Pinsky et al., 2013 Greene, 2016). This work provides critical information to conserve the species and mitigate human-induced risks.

These results indicate that the northern range of the population is probably influenced by energetic requirements to minimize the distance between suitable foraging habitat and low latitude calving grounds, rather than an absence of suitable foraging conditions in high latitude waters, or other environmental or physiological factors. NARWs were present on the Scotian Shelf (45°N) nearly year-round, but only from May through December in the Cabot Strait (50°N). NARWs were not detected in the Labrador Sea and Newfoundland Shelf, despite their preferred prey occurring in those areas. The results support that while a portion of the population has moved northward into the GSL, this shift was constrained to temperate latitudinal ranges < 52°N during the study period. To achieve this, passive acoustic monitoring data were collected and analyzed from 67 moorings and 13 gliders deployed (across 38 recording stations) throughout the Atlantic Canadian continental shelf, between 42°N and 58°N during 2015 through 2017. In addition, we sought to identify relevant NARW migratory corridors and explore potential previously unidentified high-use habitats beyond the highly surveyed Gulf of St.

The objectives of this study were to characterize the spatial and temporal variation in NARW acoustic occurrence in the northern portion of their foraging range. The distribution of critically endangered North Atlantic right whale ( Eubalaena glacialis NARW) north of 45°N has been largely unknown due to a lack of systematic monitoring. Range shifts are consequential to animal ecology, ecosystem function, and conservation goals, yet for many species these cannot be characterised without means of synoptically measuring their distribution. Northward range shifts are increasingly being identified in mobile animals that are responding to climate change. 5Department of Biological Sciences, University of New Brunswick, Saint John, NB, Canada.4Fisheries and Oceans Canada, Northwest Atlantic Fisheries Center, St.3JASCO Applied Sciences, Halifax, NS, Canada.2Fisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, NS, Canada.1Department of Oceanography, Dalhousie University, Halifax, NS, Canada.Johnson 1 Katie Kowarski 3 Julien Delarue 3 Hilary Moors-Murphy 2 Emily Maxner 3 Jack W.

Delphine Durette-Morin 1* Clair Evers 2 Hansen D.

Dale hansen unplugged june 2017