Genetic parentage analyses reveal considerable diversity in alternative reproductive behaviours (e.g. sneaking) in many taxa. However, little is known about whether these behaviours vary seasonally and between populations. Here, we investigate seasonal variation in male reproductive behaviours in a population of two-spotted gobies (Gobiusculus flavescens) in Norway. Male two-spotted gobies guard nests, attract females and care for fertilized eggs. We collected clutches and nest-guarding males early and late in the breeding season in artificial nests...
Data from: Stable isotope-based location in a shelf sea setting: accuracy and precision are comparable to light-based location methodsClive N. Trueman, Kirsteen M. MacKenzie, Katie St. John Glew & Katie St John Glew
Retrospective determination of location for marine animals would facilitate investigations of migration, connectivity and food provenance. Predictable spatial variations in carbon and nitrogen isotopes in primary production across shelf seas provide a basis for stable isotope-based location. Here, we assess the accuracy and precision that can be obtained through dietary-isotope-based location methods. We build isoscapes from jellyfish tissues and use these to assign scallops of fixed and known individual location, and herring with well-understood population-level...
Data from: The genetic basis for ecological adaptation of the Atlantic herring revealed by genome sequencingAlvaro Martinez Barrio, Sangeet Lamichhaney, Guangyi Fan, Nima Rafati, Mats Pettersson, He Zhang, Jacques Dainat, Diana Ekman, Marc Höppner, Patric Jern, Marcel Martin, Björn Nystedt, Xin Liu, Wenbin Chen, Xinming Liang, Chengcheng Shi, Yuanyuan Fu, Kailong Ma, Xiao Zhan, Chungang Feng, Ulla Gustafson, Carl-Johan Rubin, Markus Sällman Almén, Martina Blass, Michele Casini … & Leif Andersson
Ecological adaptation is of major relevance to speciation and sustainable population management, but the underlying genetic factors are typically hard to study in natural populations due to genetic differentiation caused by natural selection being confounded with genetic drift in subdivided populations. Here, we use whole genome population sequencing of Atlantic and Baltic herring to reveal the underlying genetic architecture at an unprecedented detailed resolution for both adaptation to a new niche environment and timing of...
Data from: Does density influence relative growth performance of farm, wild, and F1 hybrid Atlantic salmon in semi-natural and hatchery common garden conditions?Alison C. Harvey, Gareth Juleff, Gary R. Carvalho, Martin I. Taylor, Monica F. Solberg, Simon Creer, Lise Dyrhovden, Ivar-Helge Matre & Kevin A. Glover
The conditions encountered by Atlantic salmon, Salmo salar L., in aquaculture are markedly different from the natural environment. Typically, farmed salmon experience much higher densities than wild individuals, and may therefore have adapted to living in high densities. Previous studies have demonstrated that farmed salmon typically outgrow wild salmon by large ratios in the hatchery, but these differences are much less pronounced in the wild. Such divergence in growth may be explained partly by the...
Data from: Habitat discontinuities separate genetically divergent populations of a rocky shore marine fishEnrique Blanco Gonzalez, Halvor Knutsen & Per Erik Jorde
Habitat fragmentation has been suggested to be responsible for major genetic differentiations in a range of marine organisms. In this study, we combined genetic data and environmental information to unravel the relative role of geography and habitat heterogeneity on patterns of genetic population structure of corkwing wrasse (Symphodus melops), a rocky shore species at the northern limit of its distribution range in Scandinavia. Our results revealed a major genetic break separating populations inhabiting the western...
Data from: Geographic extent of introgression in Sebastes mentella and its effect on genetic population structureAtal Saha, Torild Johansen, Rasmus Hedeholm, Einar E. Nielsen, Jon-Ivar Westgaard, Lorenz Hauser, Benjamin Planque, Steven X. Cadrin & Jesper Boje
Genetic population structure is often used to identify management units in exploited species, but the extent of genetic differentiation may be inflated by geographic variation in the level of hybridization between species. We identify the genetic population structure of Sebastes mentella and investigate possible introgression within the genus by analyzing 13 microsatellites in 2,562 redfish specimens sampled throughout the North Atlantic. The data support an historical divergence between the “shallow” and “deep” groups, beyond the...
Data from: Thermal plasticity in farmed, wild and hybrid Atlantic salmon during early development: has domestication caused divergence in low temperature tolerance?Monica Favnebøe Solberg, Lise Dyrhovden, Ivar Helge Matre & Kevin Alan Glover
Background: In the past three decades, millions of domesticated Atlantic salmon Salmo salar L. have escaped from farms into the wild. Their offspring display reduced survival in the natural environment, which demonstrates that gene-flow is likely to have a negative effect on wild populations. However, inter-population differences in introgression of farmed salmon have been observed, and the underlying ecological mechanisms remain enigmatic. We hypothesised that domestication-driven divergence in tolerance to low temperatures during early development...
Data from: Population structure in Atlantic cod in the eastern North Sea-Skagerrak-Kattegat: early life stage dispersal and adult migrationCarl André, Henrik Svedäng, Halvor Knutsen, Geir Dahle, Patrik Jonsson, Anna-Karin Ring, Mattias Sköld & Per Erik Jorde
Background: In marine fish species, where pelagic egg and larvae drift with ocean currents, population structure has been suggested to be maintained by larval retention due to hydrographic structuring and by homing of adult fish to natal areas. Whilst natal homing of adults has been demonstrated for anadromous and coral reef fishes, there are few documented examples of philopatric migration in temperate marine fish species. Results: Here, we demonstrate temporally stable genetic differentiation among spawning...
Data from: Plasticity in growth of farmed and wild Atlantic salmon: is the increased growth rate of farmed salmon caused by evolutionary adaptations to the commercial diet?Alison C. Harvey, Monica F. Solberg, Eva Troianou, Gary R. Carvalho, Martin I. Taylor, Simon Creer, Lise Dyrhovden, Ivar Helge Matre & Kevin A. Glover
Background: Domestication of Atlantic salmon for commercial aquaculture has resulted in farmed salmon displaying substantially higher growth rates than wild salmon under farming conditions. In contrast, growth differences between farmed and wild salmon are much smaller when compared in the wild. The mechanisms underlying this contrast between environments remain largely unknown. It is possible that farmed salmon have adapted to the high-energy pellets developed specifically for aquaculture, contributing to inflated growth differences when fed on...
Data from: Feeding ecology of Northeast Atlantic mackerel, Norwegian spring-spawning herring and blue whiting in the Norwegian SeaEneko Bachiller, Georg Skaret, Leif Nøttestad & Aril Slotte
The Norwegian spring-spawning (NSS) herring (Clupea harengus), blue whiting (Micromesistius poutassou) and Northeast Atlantic (NEA) mackerel (Scomber scombrus) are extremely abundant pelagic planktivores that feed in the Norwegian Sea (NS) during spring and summer. This study investigated the feeding ecology and diet composition of these commercially important fish stocks on the basis of biological data, including an extensive set of stomach samples in combination with hydrographical data, zooplankton samples and acoustic abundance data from 12...
Data from: Modelled drift patterns of fish larvae link coastal morphology to seabird colony distributionHanno Sandvik, Robert T. Barrett, Kjell Einar Erikstad, Mari S. Myksvoll, Frode Vikebø, Nigel Yoccoz, Tycho Anker-Nilssen, Svein-Håkon Lorentsen, Tone K. Reiertsen, Jofrid Skarðhamar, Mette Skern-Mauritzen & Geir Helge Systad
Colonial breeding is an evolutionary puzzle, as the benefits of breeding in high densities are still not fully explained. Although the dynamics of existing colonies are increasingly understood, few studies have addressed the initial formation of colonies, and empirical tests are rare. Using a high-resolution larval drift model, we here document that the distribution of seabird colonies along the Norwegian coast can be explained by variations in the availability and predictability of fish larvae. The...
Norwegian Institute of Marine Research11
University of Oslo2
University of East Anglia2
Swedish University of Agricultural Sciences2
University of Bergen2
Norwegian University of Science and Technology2
University of Washington1
University of Massachusetts Darmouth1
Texas A&M University1