English
norskBlar i forfatter "Lindstrøm, Ulf Ove"
Viser treff 1-11 av 11
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Changes in humpback whale song structure and complexity reveal a rapid evolution on a feeding ground in Northern Norway
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-09)Singing behaviour by male humpback whales (Megaptera novaeangliae) has traditionally been associated with low-latitude breeding grounds. However, in recent years, this vocal behaviour has been increasingly reported outside these areas. All singers in a given population sing the same version of a song and this song is continually evolving over time with modifications on different levels within the ... -
Combined effects of temperature and fishing mortality on the Barents Sea ecosystem stability
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-16)Temporal variability in abundance and composition of species in marine ecosystems results from a combination of internal processes, external drivers, and stochasticity. One way to explore the temporal variability in an ecosystem is through temporal stability, measured using the inverse of the coefficient of variation for biomass of single species. The effect of temperature and fisheries on the ... -
Evolutionary history and seascape genomics of Harbour porpoises (Phocoena phocoena) across environmental gradients in the North Atlantic and adjacent waters
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-08)The Harbour porpoise (Phocoena phocoena) is a highly mobile cetacean species primarily occurring in coastal and shelf waters across the Northern hemisphere. It inhabits heterogeneous seascapes broadly varying in salinity and temperature. Here, we produced 74 whole genomes at intermediate coverage to study Harbour porpoise's evolutionary history and investigate the role of local adaptation in the ... -
Identifying seasonal distribution patterns of fin whales across the Scotia Sea and the Antarctic Peninsula region using a novel approach combining habitat suitability models and ensemble learning methods
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-16)Following their near extirpation by industrial whaling of the 20th century, the population status of Southern Hemisphere fin whales (SHFW) remains unknown. Systematic surveys estimating fin whale abundance in the Southern Ocean are not yet available. Records of fin whale sightings have been collected by a variety of organisations over the past few decades, incorporating both opportunistic data and ... -
Intra-season variations in distribution and abundance of humpback whales in the West Antarctic Peninsula using cruise vessels as opportunistic platforms
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-09)Fine-scale knowledge of spatiotemporal dynamics in cetacean distribution and abundance throughout the Western Antarctic Peninsula (WAP) is sparse yet essential for effective ecosystem-based management (EBM). Cruise vessels were used as platforms of opportunity to collect data on the distribution and abundance of humpback whales (Megaptera novaeangliae) during the austral summer of 2019/2020 in a ... -
Large-scale seabird community structure along oceanographic gradients in the Scotia Sea and northern Antarctic Peninsula
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-18)Introduction: The Scotia Sea and Antarctic Peninsula are warming rapidly and changes in species distribution are expected. In predicting habitat shifts and considering appropriate management strategies for marine predators, a community-level understanding of how these predators are distributed is desirable. Acquiring such data, particularly in remote areas, is often problematic given the cost ... -
Marine mammal consumption and fisheries removals in the Nordic and Barents Seas
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-28)In this study, we assess prey consumption by the marine mammal community in the northeast Atlantic [including 21 taxa, across three regions: (I) the Icelandic shelf, Denmark Strait, and Iceland Sea (ICE); (II) the Greenland and Norwegian Seas (GN); and (III) the Barents Sea (BS)], and compare mammal requirements with removals by fisheries. To determine prey needs, estimates of energetic requirements ... -
Niches of marine mammals in the European Arctic
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-11)The Arctic is warming rapidly, with concomitant sea ice losses and ecosystem changes. The animals most vulnerable to Arctic food web changes are long-lived and slow-growing such as marine mammals, which may not be able to adapt rapidly enough to respond to changes in their resource bases. To determine the current extent and sources of these resource bases, we examined isotopic and trophic niches ... -
A risk assessment review of mercury exposure in Arctic marine and terrestrial mammals
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-16)There has been a considerable number of reports on Hg concentrations in Arctic mammals since the last Arctic Monitoring and Assessment Programme (AMAP) effort to review biological effects of the exposure to mercury (Hg) in Arctic biota in 2010 and 2018. Here, we provide an update on the state of the knowledge of health risk associated with Hg concentrations in Arctic marine and terrestrial mammal ... -
A standard protocol for describing the evaluation of ecological models
(Journal article; Tidsskriftartikkel; Peer reviewed, 2022-07-21)Numerical models of ecological systems are increasingly used to address complex environmental and resource management questions. One challenge for scientists, managers, and stakeholders is to appraise how well suited these models are to answer questions of scientific or societal relevance, that is, to perform, communicate, or access transparent evaluations of ecological models. While there have been ... -
Still Arctic? — The changing Barents Sea
(Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-13)The Barents Sea is one of the Polar regions where current climate and ecosystem change is most pronounced. Here we review the current state of knowledge of the physical, chemical and biological systems in the Barents Sea. Physical conditions in this area are characterized by large seasonal contrasts between partial sea-ice cover in winter and spring versus predominantly open water in summer and ...
