13 Works

Data from: Estimation of effective population size in continuously distributed populations: there goes the neighborhood

Maile C. Neel, Kevin McKelvey, Robin S. Waples, Nils Ryman, Michael W. Lloyd, Ruth Short Bull, Fred W. Allendorf & Michael K. Schwartz
Use of genetic methods to estimate effective population size (N^e) is rapidly increasing, but all approaches make simplifying assumptions unlikely to be met in real populations. In particular, all assume a single, unstructured population, and none has been evaluated for use with continuously distributed species. We simulated continuous populations with local mating structure, as envisioned by Wright's concept of neighborhood size (NS), and evaluated performance of a single-sample estimator based on linkage disequilibrium (LD), which...

Data from: Implications of a temperature increase for host plant range: predictions for a butterfly

Hélène Audusseau, Sören Nylin & Niklas Janz
Although changes in phenology and species associations are relatively well-documented responses to global warming, the potential interactions between these phenomena are less well understood. In this study, we investigate the interactions between temperature, phenology (in terms of seasonal timing of larval growth) and host plant use in the polyphagous butterfly Polygonia c-album. We found that the hierarchy of larval performance on three natural host plants was not modified by a temperature increase as such. However,...

Data from: Likelihood inference of non-constant diversification rates with incomplete taxon sampling

Sebastian Höhna
Large-scale phylogenies provide a valuable source to study background diversification rates and investigate if the rates have changed over time. Unfortunately most large-scale, dated phylogenies are sparsely sampled (fewer than 5% of the described species) and taxon sampling is not uniform. Instead, taxa are frequently sampled to obtain at least one representative per subgroup (e.g. family) and thus to maximize diversity (diversified sampling). So far, such complications have been ignored, potentially biasing the conclusions that...

Data from: Internet-delivered therapist-guided physical activity for mild to moderate depression: a randomized controlled trial

Morgan Ström, Carl-Johan Uckelstam, Gerhard Andersson, Peter Hassmén, Göran Umefjord & Per Carlbring
Objective: The main hypothesis, and the objective of the study, was to test if the participants allocated to the treatment group would show a larger reduction in depressive symptoms than those in the control group. Methods: This study was a randomized nine week trial of an Internet-administered treatment based on guided physical exercise for Major Depressive Disorder (MDD). A total of 48 participants with mild to moderate depression, diagnosed using the Structured Clinical Interview for...

Data from: Hyaluronan and N-ERC/mesothelin as key biomarkers in a specific two-step model to predict pleural malignant mesothelioma

Filip Mundt, Gustav Nilsonne, Sertaç Arslan, Karola Csürös, Gunnar Hillerdal, Huseyin Yildirim, Muzaffer Metintas, Katalin Dobra & Anders Hjerpe
Purpose: Diagnosis of malignant mesothelioma is challenging. The first available diagnostic material is often an effusion and biochemical analysis of soluble markers may provide additional diagnostic information. This study aimed to establish a predictive model using biomarkers from pleural effusions, to allow early and accurate diagnosis. Patients and Methods: Effusions were collected prospectively from 190 consecutive patients at a regional referral centre. Hyaluronan, N-ERC/mesothelin, C-ERC/mesothelin, osteopontin, syndecan-1, syndecan-2, and thioredoxin were measured using ELISA and...

Data from: Reproductive isolation and patterns of genetic differentiation in a cryptic butterfly species complex

Vlad Dincă, Christer Wiklund, Vladimir A. Lukhtanov, Ullasa Kodandaramaiah, Karin Norén, Leonardo Dapporto, Niklas Wahlberg, Roger Vila & Magne Friberg
Molecular studies of natural populations are often designed to detect and categorize hidden layers of cryptic diversity, and an emerging pattern suggests that cryptic species are more common and more widely distributed than previously thought. However, these studies are often decoupled from ecological and behavioural studies of species divergence. Thus, the mechanisms by which the cryptic diversity is distributed and maintained across large spatial scales are often unknown. In 1988, it was discovered that the...

Data from: Seasonality maintains alternative life history phenotypes

Sami Mikael Kivelä, Panu Välimäki & Karl Gotthard
Many organisms express discrete alternative phenotypes (polyphenisms) in relation to predictable environmental variation. However, the evolution of alternative life history phenotypes remains poorly understood. Here, we analyze the evolution of alternative life histories in seasonal environments by using temperate insects as a model system. Temperate insects express alternative developmental pathways of diapause and direct development, the induction of a certain pathway affecting fitness through its life history correlates. We develop a methodologically novel and holistic...

Data from: Transgenerational effects and the cost of ant tending in aphids

Karolina Tegelaar, Robert Glinwood, Jan Pettersson & Olof Leimar
In mutualistic interactions, partners obtain a net benefit, but there may also be costs associated with the provision of benefits for a partner. The question of whether aphids suffer such costs when attended by ants has been raised in previous work. Transgenerational effects, where offspring phenotypes are adjusted based on maternal influences, could be important in the mutualistic interaction between aphids and ants, in particular because aphids have telescoping generations where two offspring generations can...

Data from: Social status and personality: stability in social state can promote consistency of behavioural responses

Anna Favati, Olof Leimar, Tommy Radesäter, Hanne Løvlie, T. Radesater & H. Lovlie
Stability of ‘state’ has been suggested as an underlying factor explaining behavioural stability and animal personality (i.e. variation among, and consistency within individuals in behavioural responses), but the possibility that stable social relationships represent such states remains unexplored. Here, we investigated the influence of social status on the expression and consistency of behaviours by experimentally changing social status between repeated personality assays. We used male domestic fowl (Gallus gallus domesticus), a social species that forms...

Data from: Artificial selection on relative brain size reveals a positive genetic correlation between brain size and proactive personality in the guppy

Alexander Kotrschal, Eva J. P. Lievens, Josefin Dahlbom, Andreas Bundsen, Svetlana Semenova, Maria Sundvik, Alexei A. Maklakov, Svante Winberg, Pertti Panula, Niclas Kolm & Eva JP Lievens
Animal personalities range from individuals that are shy, cautious, and easily stressed (a ‘reactive’ personality type) to individuals that are bold, innovative and quick to learn novel tasks, but also prone to routine formation (a ‘proactive’ personality type). Although personality differences should have important consequences for fitness, their underlying mechanisms remain poorly understood. Here, we investigated how genetic variation in brain size affects personality. We put selection lines of large- and small-brained guppies (Poecilia reticulata),...

Data from: Mechanisms of macroevolution: polyphagous plasticity in butterfly larvae revealed by RNA-Seq

Maria De La Paz Celorio-Mancera, Christopher W. Wheat, Heiko Vogel, Lina Söderlind, Niklas Janz & Sören Nylin
Transcriptome studies of insect herbivory are still rare, yet studies in model systems have uncovered patterns of transcript regulation that appear to provide insights into how insect herbivores attain polyphagy, such as a general increase in expression breadth and regulation of ribosomal, digestion- and detoxification-related genes. We investigated the potential generality of these emerging patterns, in the Swedish comma, Polygonia c-album, which is a polyphagous, widely-distributed butterfly. Urtica dioica and Ribes uva-crispa are hosts of...

Data from: Parallel speciation or long-distance dispersal? Lessons from seaweeds (Fucus) in the Baltic Sea

Ricardo T. Pereyra, Cecilia Huenchuñir, Daniel Johansson, Helena Forslund, Lena Kautsky, Per R. Jonsson & Kerstin Johannesson
Parallel evolution has been invoked as a forceful mechanism of ecotype and species formation in many animal taxa. However, parallelism may be difficult to separate from recently monophyletically diverged species that are likely to show complex genetic relationships as a result of considerable shared ancestral variation and secondary hybridization in local areas. Thus, species’ degrees of reproductive isolation, barriers to dispersal and in particular, limited capacities for long-distance dispersal, will affect demographic structures underlying mechanisms...

Data from: Advancing population ecology with integral projection models: a practical guide

Cory Merow, Johan P. Dalgren, C. Jessica E. Metcalf, Dylan Z. Childs, M. E. K. Evans, Eelke Jongejans, Sydne Record, Mark Rees, Roberto Salguero-Gómez, Sean M. McMahon, Margaret E.K. Evans & Johan P. Dahlgren
Integral Projection Models (IPMs) use information on how an individual's state influences its vital rates - survival, growth and reproduction - to make population projections. IPMs are constructed from regression models predicting vital rates from state variables (e.g., size or age) and covariates (e.g., environment). By combining regressions of vital rates, an IPM provides mechanistic insight into emergent ecological patterns such as population dynamics, species geographic distributions, or life history strategies. Here, we review important...

Registration Year

  • 2013
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  • Dataset
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Affiliations

  • Stockholm University
    13
  • Uppsala University
    2
  • Karolinska Institute
    2
  • University of Montana
    1
  • Karolinska University Hospital
    1
  • University of Queensland
    1
  • Radboud University Nijmegen
    1
  • University of Gothenburg
    1
  • University of Connecticut
    1
  • Max Planck Institute for Demographic Research
    1