46 Works

Data from: The sexual selection paradigm: have we overlooked other mechanisms in the evolution of male ornaments?

Ulrika Candolin & Iina Tukiainen
Extravagant male ornaments expressed during reproduction are almost invariably assumed to be sexually selected and evolve through competition for mating opportunities. Yet in species where male reproductive success depends on the defence of offspring, male ornaments could also evolve through social competition for offspring survival. However, in contrast to female ornaments, this possibility has received little attention in males. We show that a male ornament that is traditionally assumed to be sexually selected—the red nuptial...

Data from: Mesoclosures – increasing realism in mesocosm studies of ecosystem functioning

Saija Lähteenmäki, Eleanor M. Slade, Bess Hardwick, Gustavo Schiffler, Júlio Louzada, Jos Barlow & Tomas Roslin
1. Experimental studies linking community composition to functioning are typically confined to small and closed micro- or mesocosms. Such restricted conditions may affect both species’ biology and their environment. Yet, targeting simple features in the behaviour of species may circumvent these constraints. Focusing on ecological functions provided by dung beetles, we test whether large, open-top cages – MESOCLOSURES – will intercept the flight trajectories of beetles, thereby allowing manipulation of local community composition. 2. MESOCLOSURES...

Data from: Temperature and sex related effects of serine protease alleles on larval development in the Glanville fritillary butterfly

Virpi Ahola, Patrik Koskinen, Swee Chong Wong, Jouni Kvist, Lars Paulin, Petri Auvinen, Marjo Saastamoinen, Mikko J. Frilander, Rainer Lehtonen & Ilkka Hanski
The body reserves of adult Lepidoptera are accumulated during larval development. In the Glanville fritillary butterfly, larger body size increases female fecundity, but in males fast larval development and early eclosion, rather than large body size, increase mating success and hence fitness. Larval growth rate is highly heritable, but genetic variation associated with larval development is largely unknown. By comparing the Glanville fritillary population living in the Åland Islands in northern Europe with a population...

Data from: Inter-annual variation and long-term trends in proportions of resident individuals in partially migratory birds

Kalle Meller, Anssi V Vähätalo, Tatu Hokkanen, Jukka Rintala, Markus Piha & Aleksi Lehikoinen
Partial migration – a part of a population migrates and another part stays resident year-round on the breeding site – is probably the most common type of migration in the animal kingdom, yet it has only lately garnered more attention. Theoretical studies indicate that in partially migratory populations, the proportion of resident individuals (PoR) should increase in high latitudes in response to the warming climate, but empirical evidence exists for few species. We provide the...

Data from: Disentangling the ‘brown world’ faecal-detritus interaction web: dung beetle effects on soil microbial properties

Eleanor M. Slade, Tomas Roslin, Minna Santalahti & Thomas Bell
Many ecosystem services are sustained by the combined action of microscopic and macroscopic organisms, and shaped by interactions between the two. However, studies tend to focus on only one of these two components. We combined the two by investigating the impact of macrofauna on microbial community composition and functioning in the context of a major ecosystem process: the decomposition of dung. We compared bacterial communities of pasture soil and experimental dung pats inhabited by one...

Data from: Crying wolf to a predator: deceptive vocal mimicry by a bird protecting young

Branislav Igic, Jessica McLachlan, Inkeri Lehtinen & Robert D. Magrath
Animals often mimic dangerous or toxic species to deter predators; however, mimicry of such species may not always be possible and mimicry of benign species seems unlikely to confer anti-predator benefits. We reveal a system in which a bird mimics the alarm calls of harmless species to fool a predator 40 times its size and protect its offspring against attack. Our experiments revealed that brown thornbills (Acanthiza pusilla) mimic a chorus of other species' aerial...

Data from: What data to use for forest conservation planning? A comparison of coarse open and detailed proprietary forest inventory data in Finland

Joona A. Lehtomäki, Sakari Tuominen, Tuuli Toivonen, Antti Leinonen & Joona Lehtomäki
The boreal region is facing intensifying resource extraction pressure, but the lack of comprehensive biodiversity data makes operative forest conservation planning difficult. Many countries have implemented forest inventory schemes and are making extensive and up-to-date forest databases increasingly available. Some of the more detailed inventory databases, however, remain proprietary and unavailable for conservation planning. Here, we investigate how well different open and proprietary forest inventory data sets suit the purpose of conservation prioritization in Finland....

Data from: Construction of ultra-dense linkage maps with Lep-MAP2: stickleback F2 recombinant crosses as an example

Pasi Rastas, Federico C. F. Calboli, Baocheng Guo, Takahito Shikano & Juha Merilä
High-density linkage maps are important tools for genome biology and evolutionary genetics by quantifying the extent of recombination, linkage disequilibrium and chromosomal rearrangements across chromosomes, sexes and populations. They provide one of the best ways to validate and refine de novo genome assemblies, with the power to identify errors in assemblies increasing with marker density. However, assembly of high-density linkage maps is still challenging due to software limitations. We describe Lep-MAP2, a software for ultra-dense...

Data from: Increasing frequency of low summer precipitation synchronizes dynamics and compromises metapopulation stability in the Glanville fritillary butterfly

Ayco J. M. Tack, Tommi Mononen & Ilkka Hanski
Climate change is known to shift species' geographical ranges, phenologies and abundances, but less is known about other population dynamic consequences. Here, we analyse spatio-temporal dynamics of the Glanville fritillary butterfly (Melitaea cinxia) in a network of 4000 dry meadows during 21 years. The results demonstrate two strong, related patterns: the amplitude of year-to-year fluctuations in the size of the metapopulation as a whole has increased, though there is no long-term trend in average abundance;...

Data from: The shepherds' tale: a genome-wide study across 9 dog breeds implicates two loci in the regulation of fructosamine serum concentration in Belgian shepherds

Simon K. G. Forsberg, Marcin Kierczak, Ingrid Ljungvall, Anne-Christine Merveille, Vassiliki Gouni, Maria Wiberg, Jakob Lundgren Willesen, Sofia Hanås, Anne-Sophie Lequarré, Louise Mejer Sørensen, Laurent Tiret, Kathleen McEntee, Eija Seppälä, Jørgen Koch, Géraldine Battaille, Hannes Lohi, Merete Fredholm, Valerie Chetboul, Jens Häggström, Örjan Carlborg, Kerstin Lindblad-Toh & Katja Höglund
Diabetes mellitus is a serious health problem in both dogs and humans. Certain dog breeds show high prevalence of the disease, whereas other breeds are at low risk. Fructosamine and glycated hemoglobin (HbA1c) are two major biomarkers of glycaemia where serum concentrations reflect glucose turnover over the past few weeks to months. In this study, we searched for genetic factors influencing variation in serum fructosamine concentration in healthy dogs using data from nine dog breeds....

Data from: Emerging patterns of genetic variation in the New Zealand endemic scallop Pecten novaezelandiae

Catarina N. S. Silva & Jonathan P. A. Gardner
Both historical and contemporary processes influence the genetic structure of species, but the relative roles of such processes are still difficult to access. Population genetic studies of species with recent evolutionary histories such as the New Zealand endemic scallop Pecten novaezelandiae (<1 Ma) permit testing of the effects of recent processes affecting gene flow and shaping genetic structure. In addition, studies encompassing the entire distributional range of species can provide insight into colonization processes. Analyses...

Data from: Effects of perceived predation risk and social environment on the development of three-spined stickleback (Gasterosteus aculeatus) morphology

Nurul I. Ab Ghani, Gábor Herczeg & Juha Merilä
Phenotypically plastic changes in response to variation in perceived predation risk are widespread, but little is known about if and how social environment modulates induced responses to predation risk. We investigated the influence of perceived predation risk (i.e. chemical cues from a predator) and social environment (i.e. one, two or 20 individuals reared together) on three-spined stickleback (Gasterosteus aculeatus) morphology in a factorial common garden experiment. We found that exposure to chemical cues from potential...

Data from: Queen pheromones modulate DNA methyltransferase activity in bee and ant workers

Luke Holman, Kalevi Trontti & Heikki Helanterä
DNA methylation is emerging as an important regulator of polyphenism in the social insects. Research has concentrated on differences in methylation between queens and workers, though we hypothesized that methylation is involved in mediating other flexible phenotypes, including pheromone-dependent changes in worker behaviour and physiology. Here, we find that exposure to queen pheromone affects the expression of two DNA methyltransferase genes in Apis mellifera honeybees and in two species of Lasius ants, but not in...

Data from: Flight-induced changes in gene expression in the Glanville fritillary butterfly

Jouni Kvist, Anniina I. K. Mattila, Panu Somervuo, Virpi Ahola, Patrik Koskinen, Lars Paulin, Leena Salmela, Toby Fountain, Pasi Rastas, Annukka Ruokolainen, Minna Taipale, Liisa Holm, Petri Auvinen, Rainer Lehtonen, Mikko J. Frilander, Ilkka Hanski & Anniina L. K. Mattila
Insect flight is one of the most energetically demanding activities in the animal kingdom, yet for many insects flight is necessary for reproduction and foraging. Moreover, dispersal by flight is essential for the viability of species living in fragmented landscapes. Here, working on the Glanville fritillary butterfly (Melitaea cinxia), we use transcriptome sequencing to investigate gene expression changes caused by 15 min of flight in two contrasting populations and the two sexes. Male butterflies and...

Data from: Signatures of selection in the three-spined stickleback along a small scale brackish water - freshwater transition zone

Nellie Konijnendijk, Takahito Shikano, Dorien Daneels, Filip A. M. Volckaert, Joost A. M. Raeymaekers & Filip A.M. Volckaert
Local adaptation is often obvious when gene flow is impeded, such as observed at large spatial scales and across strong ecological contrasts. However, it becomes less certain at small scales such as between adjacent populations or across weak ecological contrasts, when gene flow is strong. While studies on genomic adaptation tend to focus on the former, less is known about the genomic targets of natural selection in the latter situation. In this study, we investigate...

Data from: Photosynthetic and phenological responses of dwarf shrubs to the depth and properties of snow

Timo Saarinen, Sirpa Rasmus, Robin Lundell, Olli-Kalle Kauppinen & Heikki Hänninen
Snow is known to have a major impact on vegetation in arctic ecosystems, but little is known about how snow affects plants in boreal forests, where the snowpack is uneven due to canopy impact. The responses of two dwarf shrubs, the evergreen Vaccinium vitis-idaea and the deciduous V. myrtillus, to snow conditions were studied in a snow manipulation experiment in southern Finland. The thermal insulation of the snowpack was expected to decrease with partial removal...

Data from: The evolutionary legacy of size-selective harvesting extends from genes to populations

Silva Uusi-Heikkilä, Andrew R. Whiteley, Anna Kuparinen, Shuichi Matsumura, Paul A. Venturelli, Christian Wolter, Jon Slate, Craig R. Primmer, Thomas Meinelt, Shaun S. Killen, David Bierbach, Giovanni Polverino, Arne Ludwig & Robert Arlinghaus
Size-selective harvesting is assumed to alter life histories of exploited fish populations, thereby negatively affecting population productivity, recovery, and yield. However, demonstrating that fisheries-induced phenotypic changes in the wild are at least partly genetically determined has proved notoriously difficult. Moreover, the population-level consequences of fisheries-induced evolution are still being controversially discussed. Using an experimental approach, we found that five generations of size-selective harvesting altered the life histories and behavior, but not the metabolic rate, of...

Data from: Experimental evidence for sex-specific plasticity in adult brain

Gabor Herczeg, Abigél Gonda, Gergely Balázs, Kristina Noreikiene & Juha Merilä
Background: Plasticity in brain size and the size of different brain regions during early ontogeny is known from many vertebrate taxa, but less is known about plasticity in the brains of adults. In contrast to mammals and birds, most parts of a fish’s brain continue to undergo neurogenesis throughout adulthood, making lifelong plasticity in brain size possible. We tested whether maturing adult three-spined sticklebacks (Gasterosteus aculeatus) reared in a stimulus-poor environment exhibited brain plasticity in...

Data from: Ethnicity- and sex-based discrimination and the maintenance of self-esteem

Jan-Erik Lönnqvist, Heike Hennig-Schmidt & Gari Walkowitz
The psychological underpinnings of labor market discrimination were investigated by having participants from Israel, the West Bank and Germany (N = 205) act as employers in a stylized employment task in which they ranked, set wages, and imposed a minimum effort level on applicants. State self-esteem was measured before and after the employment task, in which applicant ethnicity and sex were salient. The applicants were real people and all behavior was monetarily incentivized. Supporting the...

Data from: I’m sexy and I glow it: female ornamentation in a nocturnal capital breeder

Juhani Hopkins, Gautier Baudry, Ulrika Candolin & Arja Kaitala
In many species, males rely on sexual ornaments to attract females. Females, by contrast, rarely produce ornaments. The glow-worm (Lampyris noctiluca) is an exception where wingless females glow to attract males that fly in search of females. However, little is known about the factors that promote the evolution of female ornaments in a sexual selection context. Here, we investigated if the female ornament of the glow-worm is a signal of fecundity used in male mate...

Data from: Wolbachia infection in a natural parasitoid wasp population

Anne Duplouy, Christelle Couchoux, Ilkka Hanski & Saskya Van Nouhuys
The maternally transmitted bacterium Wolbachia pipientis is well known for spreading and persisting in insect populations through manipulation of the fitness of its host. Here, we identify three new Wolbachia pipientis strains, wHho, wHho2 and wHho3, infecting Hyposoter horticola, a specialist wasp parasitoid of the Glanville fritillary butterfly. The wHho strain (ST435) infects about 50% of the individuals in the Åland islands in Finland, with a different infection rate in the two mitochondrial (COI) haplotypes...

Registration Year

  • 2015

Resource Types

  • Dataset


  • University of Helsinki
  • Swedish University of Agricultural Sciences
  • University of Jyväskylä
  • Natural Resources Institute Finland
  • University of Eastern Finland
  • Eötvös Loránd University
  • University of Groningen
  • University of Cambridge
  • Finnish Environment Institute
  • Australian National University