Data from: Climate change alters the structure of arctic marine food webs due to poleward shifts of boreal generalistsSusanne Kortsch, Raul Primicerio, Maria Fossheim, Andrey V. Dolgov & Michaela Aschan
Climate-driven poleward shifts, leading to changes in species composition and relative abundances, have been recently documented in the Arctic. Among the fastest moving species are boreal generalist fish which are expected to affect arctic marine food web structure and ecosystem functioning substantially. Here, we address structural changes at the food web level induced by poleward shifts via topological network analysis of highly resolved boreal and arctic food webs of the Barents Sea. We detected considerable...
Data from: Canine mammary tumours are affected by frequent copy number aberrations, including amplification of MYC and loss of PTENKaja S. Borge, Silje Nord, Peter Van Loo, Ole C. Lingjærde, Gjermund Gunnes, Grethe I. G. Alnæs, Hiroko K. Solvang, Torben Lüders, Vessela N. Kristensen, Anne-Lise Børresen-Dale & Frode Lingaas
Background: Copy number aberrations frequently occur during the development of many cancers. Such events affect dosage of involved genes and may cause further genomic instability and progression of cancer. In this survey, canine SNP microarrays were used to study 117 canine mammary tumours from 69 dogs. Results: We found a high occurrence of copy number aberrations in canine mammary tumours, losses being more frequent than gains. Increased frequency of aberrations and loss of heterozygosity were...
Data from: Local divergence of thermal reaction norms among amphibian populations is affected by pond temperature variationAlex Richter-Boix, Marco Katzenberger, Helder Duarte, María Quintela, Miguel Tejedo & Anssi Laurila
While temperature variation is known to cause large-scale adaptive divergence, its potential role as a selective factor over microgeographic scales is less well understood. Here, we investigated how variation in breeding pond temperature affects divergence in multiple physiological (thermal performance curve (TPC) and critical thermal maximum (CTmax)) and life history (thermal developmental reaction norms (TDRN)) traits in a network of Rana arvalis populations. The results supported adaptive responses to face two main constraints limiting the...
Data from: First indications that northern bottlenose whales are sensitive to behavioural disturbance from anthropogenic noiseP. J. O. Miller, P. H. Kvadsheim, F. P. A. Lam, P. L. Tyack, C. Curé, S. L. DeRuiter, L. Kleivane, L. D. Sivle, S. P. Van IJsselmuide, F. Visser, P. J. Wensveen, A. M. Von Benda-Beckmann, L. M. Martín López, T. Narazaki & S. K. Hooker
Although northern bottlenose whales were the most heavily hunted beaked whale, we have little information about this species in its remote habitat of the North Atlantic Ocean. Underwater anthropogenic noise and disruption of their natural habitat may be major threats, given the sensitivity of other beaked whales to such noise disturbance. We attached dataloggers to 13 northern bottlenose whales and compared their natural sounds and movements to those of one individual exposed to escalating levels...
Understanding responses of marine species to temperature variability is essential to predict impacts of future climate change in the oceans. Most ectotherms are expected to adjust their behavior to avoid extreme temperatures and minimize acute changes in body temperature. However, measuring such behavioral plasticity in the wild is challenging. Combining 4 years of telemetry-derived behavioral data on juvenile and adult (30–80 cm) Atlantic cod (Gadus morhua), and in situ ocean temperature measurements, we found a...
Habitat selection is a complex process, which involves behavioural decisions guided by the multiple needs and constraints faced by individuals. Climate-induced changes in environmental conditions may alter those trade-offs and resulting habitat use patterns. In this study we investigated the effect of sea temperature on habitat selection and habitat use of acoustically tagged Atlantic cod (Gadus morhua) at the Norwegian Skagerrak coast. Significant relationships between ocean temperature and habitat selection and use were found. Under...
Data from: Genetically distinct populations of northern shrimp, Pandalus borealis, in the North Atlantic: adaptation to different temperatures as an isolation factorPer Erik Jorde, Guldborg Søvik, Jon-Ivar Westgaard, Jon Albretsen, Carl André, Carsten Hvingel, Torild Johansen, Anne Dagrun Sandvik, Michael Kingsley & Knut Eirik Jørstad
The large-scale population genetic structure of northern shrimp, Pandalus borealis, was investigated over the species’ range in the North Atlantic, identifying multiple genetically distinct groups. Genetic divergence among sample localities varied among 10 microsatellite loci (range: FST = −0.0002 to 0.0475) with a highly significant average (FST = 0.0149; P < 0.0001). In contrast, little or no genetic differences were observed among temporal replicates from the same localities (FST = 0.0004; P = 0.33). Spatial...
Overfishing of large predatory fish populations has resulted in lasting restructurings of entire marine food webs worldwide, with serious socio-economic consequences. Fortunately, some degraded ecosystems show signs of recovery. A key challenge for ecosystem management is to anticipate the degree to which recovery is possible. By applying a statistical food-web model, using the Baltic Sea as a case study, we show that under current temperature and salinity conditions, complete recovery of this heavily altered ecosystem...
Data from: The Pillars of Hercules as a bathymetric barrier to gene-flow promoting isolation in a global deep-sea shark (Centroscymnus coelolepis)Diana Catarino, Halvor Knutsen, Ana Veríssimo, Esben Moland Olsen, Per Erik Jorde, Gui Menezes, Hanne Sannæs, David Stanković, Joan Batista Company, Francis Neat, Roberto Danovaro, Antonio Dell'Anno, Bastien Rochowski, Sergio Stefanni, Joan Baptista Company & Hanne Sannaes
Knowledge of the mechanisms limiting connectivity and gene-flow in deep-sea ecosystems is limited, especially for deep-sea sharks. The Portuguese dogfish (Centroscymnus coelolepis) is a globally distributed and Near Threatened deep-sea shark. C. coelolepis population structure was studied using 11 nuclear microsatellite markers and a 497 bp fragment from the mtDNA Control Region. High levels of genetic homogeneity across the Atlantic (ΦST=-0.0091, FST= 0.0024, P > 0.05) were found suggesting one large population unit at this...
Data from: Effects of large-scale releases on the genetic structure of red sea bream (Pagrus major, Temminck et Schlegel) populations in JapanEnrique Blanco Gonzalez, Masato Aritaki, Halvor Knutsen & Nobuhiko Taniguchi
Genotype dataGenotype dataRelease dataRelease data
Data from: The stress hormone corticosterone in a marine top-predator reflects short-term changes in food availabilityRobert T. Barrett, Kjell Einar Erikstad, Hanno Sandvik, Mari S. Myksvoll, Susi Jenni-Eiermann, Ditte L. Kristensen, Truls Moum, Tone K. Reiertsen, Frode Vikebø & Mari Myksvoll
In many seabird studies, single annual proxies of prey abundance have been used to explain variability in breeding performance, but much more important is probably the timing of prey availability relative to the breeding season when energy demand is at a maximum. Until now, intraseasonal variation in prey availability has been difficult to quantify in seabirds. Using a state-of-the-art ocean drift model of larval cod Gadus morhua, an important constituent of the diet of common...
Data from: Identification of quantitative genetic components of fitness variation in farmed, hybrid and native salmon in the wildFrancois Besnier, Kevin A. Glover, Sigbjørn Lien, Matthew Kent, Michael M. Hansen, Xia Shen & Øystein Skaala
Feral animals represent an important problem in many ecosystems due to interbreeding with wild conspecifics. Hybrid offspring from wild and domestic parents are often less adapted to local environment and ultimately, can reduce the fitness of the native population. This problem is an important concern in Norway, where each year, hundreds of thousands of farm Atlantic salmon escape from fish farms. Feral fish outnumber wild populations, leading to a possible loss of local adaptive genetic...
Several decades of research on invasive marine species have yielded a broad understanding of the nature of species invasion mechanisms and associated threats globally. However, this is not true of the Arctic, a region where ongoing climatic changes may promote species invasion. Here, we evaluated risks associated with non-indigenous propagule loads discharged with ships' ballast water to the high-Arctic archipelago, Svalbard, as a case study for the wider Arctic. We sampled and identified transferred propagules...
Decapod crustaceans exhibit considerable variation in fertilisation strategies, ranging from pervasive single paternity to the near-ubiquitous presence of multiple paternity, and such knowledge of mating systems and behaviour are required for the informed management of commercially-exploited marine fisheries. We used genetic markers to assess the paternity of individual broods in the European lobster, Homarus gammarus, a species for which paternity structure is unknown. Using 13 multiplexed microsatellite loci, three of which are newly described in...
Norwegian Institute of Marine Research14
University of Oslo8
University of Agder5
The Arctic University of Norway2
University of Gothenburg2
Institute of Systematics and Ecology of Animals1
Estación Biológica de Doñana1
Spanish Institute of Oceanography1
University of Hamburg1
Royal Swedish Academy of Sciences1