157 Works

Data from: Reproductive isolation related to mimetic divergence in the poison frog Ranitomeya imitator

Evan Twomey, Jacob S. Vestergaard & Kyle Summers
In a mimetic radiation—when a single species evolves to resemble different model species—mimicry can drive within-species morphological diversification, and, potentially, speciation. While mimetic radiations have occurred in a variety of taxa, their role in speciation remains poorly understood. We study the Peruvian poison frog Ranitomeya imitator, a species that has undergone a mimetic radiation into four distinct morphs. Using a combination of colour–pattern analysis, landscape genetics and mate-choice experiments, we show that a mimetic shift...

Data from: The use of archived tags in retrospective genetic analysis of fish

Sara Bonanomi, Nina Overgaard Therkildsen, Rasmus Berg Hedeholm, Jakob Hemmer-Hansen & Einar Eg Nielsen
Collections of historical tissue samples from fish (e.g. scales and otoliths) stored in museums and fisheries institutions are precious sources of DNA for conducting retrospective genetic analysis. However, in some cases only external tags used for documentation of spatial dynamics of fish populations have been preserved. Here we test the usefulness of fish tags as a source of DNA for genetic analysis. We extract DNA from historical tags from cod collected in Greenlandic waters between...

Data from: A replicated climate change field experiment reveals rapid evolutionary response in an ecologically important soil invertebrate

Thomas Bataillon, Nicolas Galtier, Aurelien Bernard, Nicolai Cryer, Nicolas Faivre, Sylvain Santoni, Dany Severac, Theis N. Mikkelsen, Klaus S. Larsen, Claus Beier, Jesper G. Sørensen, Martin Holmstrup, Bodil Ehlers, Bodil K. Ehlers & Teis N. Mikkelsen
Whether species can respond evolutionarily to current climate change is crucial for the persistence of many species. Yet, very few studies have examined genetic responses to climate change in manipulated experiments carried out in natural field conditions. We examined the evolutionary response to climate change in a common annelid worm using a controlled replicated experiment where climatic conditions were manipulated in a natural setting. Analyzing the transcribed genome of 15 local populations, we found that...

Data from: Hypoxic areas, density-dependence and food limitation drive the body condition of a heavily exploited marine fish predator

Michele Casini, Filip Käll, Martin Hansson, Maris Plikshs, Tatjana Baranova, Olle Karlsson, Karl Lundström, Stefan Neuenfeldt, Anna Gardmark & Joakim Hjelm
Investigating the factors regulating fish condition is crucial in ecology and the management of exploited fish populations. The body condition of cod (Gadus morhua) in the Baltic Sea has dramatically decreased during the past two decades, with large implications for the fishery relying on this resource. Here, we statistically investigated the potential drivers of the Baltic cod condition during the past 40 years using newly compiled fishery-independent biological data and hydrological observations. We evidenced a...

Data from: Bottom trawling affects fish condition through changes in the ratio of prey availability to density of competitors

Jan Geert Hiddink, Joan Moranta, Stephen Balestrini, Marija Sciberras, Marine Cendrier, Rosie Bowyer, Michel J. Kaiser, Mattias Sköld, Patrik Jonsson, Francois Bastardie & Hilmar Hinz
Bottom-trawl fisheries are widespread and cause mortality of benthic invertebrates, which in turn may lead to a decrease in the availability of prey for target fish species. Exploitation also reduces the abundance of the fish species themselves. Modelling studies have shown that bottom trawling could lead to both increases and decreases in fish production, but so far empirical evidence to test these ideas has been very limited. We hypothesize that the effect of bottom trawling...

Data from: Parallel evolution and adaptation to environmental factors in a marine flatfish: implications for fisheries and aquaculture management of the turbot (Scophthalmus maximus)

Fernanda Dotti Do Prado, Manuel Vera, Miguel Hermida, Carmen Bouza, Belén G. Pardo, Román Vilas, Andrés Blanco, Carlos Fernández, Francesco Maroso, Gregory E. Maes, Cemal Turan, Filip A.M. Volckaert, John B. Taggart, Adrian Carr, Rob Ogden, Einar E. Nielsen, The Aquatrace Consortium, Paulino Martínez & Filip A. M. Volckaert
Unraveling adaptive genetic variation represents, in addition to the estimate of population demographic parameters, a cornerstone for the management of aquatic natural living resources, which in turn, represent the raw material for breeding programs. The turbot (Scophthalmus maximus) is a marine flatfish of high commercial value living on the European continental shelf. While wild populations are declining, aquaculture is flourishing in Southern Europe. We evaluated the genetic structure of turbot throughout its natural distribution range...

Data from: Microevolution in time and space: SNP analysis of historical DNA reveals dynamic signatures of selection in Atlantic cod

Nina O. Therkildsen, Jakob Hemmer-Hansen, Thomas D. Als, Douglas P. Swain, M. Joanne Morgan, Edward A. Trippel, Stephen R. Palumbi, Dorte Meldrup & Einar E. Nielsen
Little is known about how quickly natural populations adapt to changes in their environment and how temporal and spatial variation in selection pressures interact to shape patterns of genetic diversity. We here address these issues with a series of genome scans in four overfished populations of Atlantic cod (Gadus morhua) studied over an 80-year period. Screening of >1000 gene-associated single-nucleotide polymorphisms (SNPs) identified 77 loci that showed highly elevated levels of differentiation, likely as an...

Data from: The evolution of competitive ability for essential resources

Joey R. Bernhardt, Pavel Kratina, Aaron Pereira, Manu Tamminen, Mridul K. Thomas & Anita Narwani
Competition for limiting resources is among the most fundamental ecological interactions and has long been considered a key driver of species coexistence and biodiversity. Species' minimum resource requirements, their R*s, are key traits that link individual physiological demands to the outcome of competition. However, a major question remains unanswered - to what extent are species’ competitive traits able to evolve in response to resource limitation? To address this knowledge gap, we performed an evolution experiment...

HLA Class II specificity assessed by high-density peptide microarray interactions

Thomas Osterbye, Morten Nielsen, Nadine L. Dudek, Sri H. Ramarathinam, Anthony W. Purcell, Claus Schafer-Nielsen & Soren Buus
The ability to predict and/or identify MHC binding peptides is an essential component of T cell epitope discovery; something that ultimately should benefit the development of vaccines and immunotherapies. In particular, MHC class I (MHC-I) prediction tools have matured to a point where accurate selection of optimal peptide epitopes is possible for virtually all MHC-I allotypes; in comparison, current MHC class II (MHC-II) predictors are less mature. Since MHC-II restricted CD4+ T cells control and...

Life history traits and abundance of Northeast Atlantic fish

Anna Rindorf
Life history characteristics such as asymptotic length L∞, growth rate K, the length at which 50% of the individuals have reached maturity Lmat, and natural mortality M are therefore often used to indicate the sensitivity of different species to fishing. When species-specific information is missing, an estimate of the maximum length Lmax of a species can be used to infer asymptotic length, growth rate, natural mortality, and proportion mature at length. Here, we provide a...

Data from: Rapid shifts in the thermal sensitivity of growth but not development rate causes temperature-size response variability during ontogeny in arthropods

Curtis R. Horne, Andrew G. Hirst, David Atkinson, Rodrigo Almeda & Thomas Kiørboe
Size at maturity in ectotherms commonly declines with warming. This near-universal phenomenon, formalised as the temperature-size rule, has been observed in over 80% of tested species, from bacteria to fish. The proximate cause has been attributed to the greater temperature dependence of development rate than growth rate, causing individuals to develop earlier but mature smaller in the warm. However, few studies have examined the ontogenetic progression of the temperature-size response at high resolution. Using marine...

New Magnetic Field Models of the Moon

Dhananjay Ravat, Michael Purucker & Nils Olsen
We use L1-norm model regularization of |Br| component at the surface on magnetic monopoles bases and along-track magnetic field differences alone (without vector observations) to derive high quality global magnetic field models at the surface of the Moon. The practical advantages to this strategy are: monopoles are more stable at closer spacing in comparison to dipoles, improving spatial resolution; L1-norm model regularization leads to sparse models which may be appropriate for the Moon which has...

Perdigão: ortophotos in 5cm and 20cm resolution

José Laginha Palma, Vasco Batista, Vitor Costa Gomes, João Correia Lopes, Jakob Mann & Ebba Dellwik

The digital foodscape and non-communicable diseases. Analysis of the risk factors of meal delivery applications in Denmark. DTU Skylab Foodlab Report 2021-01

Ristil Emma Skovgaard, Roberto Flore & Josef Oehmen

Gravimetric prospecting: Searching for new hydrocarbon basins using global models

Stefano Colpani
The present thesis work consists of a gravimetric prospecting based investigation, implemented on a worldwide 1 by 1 arc degree basis, by means of coupling, in a joint interpretation effort, publicly available global models: specifically, a global gravity disturbance satellite only combined model.

Policy guidelines for implementation of mussel cultivation as a mitigation measure for coastal eutrophication in the Western Baltic Sea

Jens Kjerulf Petersen, Daniel Taylor, Per Bergström, Anna-Lucia Buer, Miroslaw Darecki, Raphael Filippelli, Ing-Marie Gren, Berit Hasler, Andreas Michael Holbach, Pernille Nielsen, Mats Lindegarth, Ivar Lund, Marie Maar, Lukas Ritzenhofen, Sławomir Sagan, Camille Saurel, Gerald Schernewski, Nardine Stybel & Karen Timmermann
In this document, we present a synthesis of updated documented experience in the implementation of mussel cultivation for mitigating effects of eutrophication and parameter estimates to facilitate potential application in coastal water management plans. Included are descriptions of potential for nutrient extraction, ecological effects, and economics of mussel cultivation. The documentation presented is primarily gathered in the BONUS OPTIMUS project as well as in some nationally funded projects on mussel farming or mussel mitigation farming...

Introduction to citizen science. The case of Fangstjournalen.dk

Jitka Stilund Hansen, Signe Gadegaard, Karsten Kryger Hansen, Gertrud Stougård Thomsen, Asger Væring Larsen & Katrine Flindt Holmstrand

Untangling atmospheric flows through the lenses of wind lidars

Pedro Alvim de Azevedo Santos

Towards digital twin technology: Wind farm operation analysis and optimization using model-supported data analytics

Laura Schröder

FAIR data in a Citizen Science project “Fangstjournalen”

Katrine Flindt Holmstrand, Asger Væring Larsen, Signe Gadegaard, Jitka Stilund Hansen, Karsten Kryger Hansen & Gertrud Stougård Thomsen
In this video Researcher Christian Skov from DTU Aqua tells about the Citizen Science project “Fangstjournalen” and how Research Data Management, data sharing and following the FAIR guiding principles for research data can increase the impact and the value of the research - even beyond the scope of the project. This video is produced by four Danish Universities as part of a project financially supported by DEFF. The aim of the project is to identify...

The effect of temperature on appetite in fish

Fredrik Jutfelt, Tommy Norin, Eirik Åsheim, Lauren Rowsey, Anna Andreassen, Rachael Morgan, Timothy Clark & Ben Speers-Roesch
Temperature has a dramatic effect on the physiology of ectothermic animals, impacting most of their biology. When temperatures increase above optimal for an animal, their growth gradually decreases. The main mechanism behind this growth rate reduction is unknown. Here, we suggest the ‘aerobic scope protection’ hypothesis as a mechanistic explanation for the reduction in growth. After a meal, metabolic rate, and hence oxygen consumption rate, transiently increases in a process called specific dynamic action (SDA)....

Hvordan løser vi verdens store problemer?

Steen Rasmussen, Oliver Ekberg & Kristina Korsholm

Advancements in osmosis- and pressure driven membrane separation processes - Optimizations of membrane module designs through computational fluid dynamics

Fynn Jerome Aschmoneit
Water stress affects an increasing part of the world population. In 2019, 2 billion people were estimated to live in water stressed countries, and around 30% of the world population doesn’t have access to save drinking water. Potable water production through water treatment is therefore essential for counteracting water stress and securing the supply of clean water. However, water treatment is energy intensive and exhibits a significant environmental impact. The energy-efficient treatment of water is...

Smarte antistoffer kan føre til bedre behandlingsmetoder

Rasmus Wied Pedersen, Line Ledsgaard, Charlotte RIMBAULT & Christoffer Sørensen

Sådan undgår Viktor Axelsen nye ankelskader i jagten på OL-guld

Filip Gertz Lysdal

Registration Year

  • 2021
    44
  • 2020
    36
  • 2019
    13
  • 2018
    11
  • 2017
    13
  • 2016
    13
  • 2015
    12
  • 2014
    5
  • 2013
    5
  • 2012
    3

Resource Types

  • Dataset
    97
  • Text
    42
  • Dissertation
    8
  • Other
    3
  • Audiovisual
    2
  • Report
    2
  • Collection
    1
  • Preprint
    1
  • Software
    1

Affiliations

  • Technical University of Denmark
    157
  • Aarhus University
    14
  • University of Copenhagen
    11
  • Swiss Federal Institute of Aquatic Science and Technology
    8
  • Bangor University
    7
  • Lund University
    7
  • Marine Research Institute
    6
  • Spanish Institute of Oceanography
    5
  • University of Gothenburg
    5
  • Grønlands Naturinstitut
    5