To date, mate choice studies have mostly focused on establishing which mates are chosen or how the choices are performed. Here, we combined these two approaches by empirically testing how latency to mate is affected by various search costs, variation in mate quality and female quality in the sand goby (Pomatoschistus minutus). Our results show that females adjust their mating behaviour according to the costs and benefits of the choice situation. Specifically, they mated sooner...
Data from: Reproductive isolation and patterns of genetic differentiation in a cryptic butterfly species complexVlad 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...
Harmful parasite infestation can cause energetically costly behavioural and immunological responses, with the potential to reduce host fitness and survival. It has been hypothesized that the energetic costs of infection cause resting metabolic rate (RMR) to increase. Furthermore, under terminal investment theory, individuals exposed to pathogens should allocate resources to current reproduction when life expectancy is reduced, instead of concentrating resources on an immune defence. In this study, we activated the immune system of Tenebrio...
Over the recent years, growing number of studies suggests that intensive size-selective fishing can cause evolutionary changes in life-history traits in the harvested population, which can have drastic negative effects on populations, ecosystems and fisheries. However, most studies to date have overlooked the potential role of immigration of fish with different phenotypes as an alternative plausible mechanism behind observed phenotypic trends. Here, we investigated the evolutionary consequences of intensive fishing simultaneously at phenotypic and molecular...
Data from: Divergent selection on, but no genetic conflict over, female and male timing and rate of reproduction in a human populationElisabeth Bolund, Sandra Bouwhuis, Jenni E. Pettay & Virpi Lummaa
The sexes often have different phenotypic optima for important life-history traits, and because of a largely shared genome this can lead to a conflict over trait expression. In mammals, the obligate costs of reproduction are higher for females, making reproductive timing and rate especially liable to conflict between the sexes. While studies from wild vertebrates support such sexual conflict, it remains unexplored in humans. We used a pedigreed human population from preindustrial Finland to estimate...
Data from: Genetic and phenotypic relationships between immune defense, melanism and life history traits at different temperatures and sexes in Tenebrio molitorMarkus J. Rantala, Jenni Prokkola, Derek Roff, Tiia Kärkkäinen & Indrikis Krams
Insect cuticle melanism is linked to a number of life-history traits, and a positive relationship is hypothesized between melanism and the strength of immune defense. In this study, the phenotypic and genetic relationships between cuticular melanization, innate immune defense, individual development time and body size were studied in the mealworm beetle (Tenebrio molitor) using three different temperatures with a half-sib breeding design. Both innate immune defense and cuticle darkness were higher in females than males,...
Data from: Molecular identification of cryptic bumblebee species from degraded samples using PCR-RFLP approachSalla-Riikka Vesterlund, Jouni Sorvari & Anti Vasemägi
The worldwide decline and local extinctions of bumblebees has raised a need for fast and accurate tools for species identification. Morphological characters are often not sufficient and molecular methods have been increasingly used for reliable identification of bumblebee species. Molecular methods often require high quality DNA which makes them less suitable for analysis of low quality or older samples. We developed an efficient PCR-RFLP identification method for four bumblebee species of the subgenus Bombus s....
Data from: Characterizing genic and non-genic molecular markers: comparison of microsatellites and SNPsJacquelin DeFaveri, Heidi Viitaniemi, Erica Leder & Juha Merilä
The implications of transitioning to single nucleotide polymorphism (SNPs) from microsatellite markers (MSs) have been investigated in a number of population genetics studies, but the effect of genomic location on the amount of information each type of marker reveals has not been explored in detail. We developed novel SNP markers flanking 1 kb regions of 13 genic (within gene or <1 kb away from gene) and 13 nongenic (>10 kb from annotated gene) MSs in...
The genetic architecture of behavioral traits is yet relatively poorly understood in most non-model organisms. Using an F2-intercross (n = 283 offspring) between behaviorally divergent nine-spined stickleback (Pungitius pungitius) populations, we tested for and explored the genetic basis of different behavioral traits with the aid of quantitative trait locus (QTL) analyses based on 226 microsatellite markers. The behaviors were analyzed both separately (viz. feeding activity, risk-taking and exploration) and combined in order to map composite...
Data from: Quantitative trait loci for growth and body size in the nine-spined stickleback Pungitius pungitius L.Veronika N. Laine, Takahito Shikano, Gábor Herczeg, Johanna Vilkki & Juha Merilä
Body size is an ecologically important trait shown to be genetically variable both within and among different animal populations as revealed by quantitative genetic studies. However, few studies have looked into underlying genetic architecture of body size variability in the wild using genetic mapping methods. With the aid of quantitative trait loci (QTL) analyses based on 226 microsatellite markers, we mapped body size and growth rate traits in the nine-spined stickleback (Pungitius pungitius) using an...
Data from: Facial attractiveness is related to women’s cortisol and body fat, but not with immune responsivenessMarkus J. Rantala, Vinet Coetzee, Fhionna R. Moore, Ilona Skrida, Sanita Kecko, Tatjana Krama, Inese Kivleniece, Indrikis Krams & I. Skrinda
Recent studies suggest that facial attractiveness indicates immune responsiveness in men and that this relationship is moderated by stress hormones which interact with testosterone levels. However, studies testing whether facial attractiveness in women signals their immune responsiveness are lacking. Here, we photographed young Latvian women, vaccinated them against hepatitis B and measured the amount of specific antibodies produced, cortisol levels and percentage body fat. Latvian men rated the attractiveness of the women's faces. Interestingly, in...
University of Turku11
University of Helsinki4
Estonian University of Life Sciences3
Eötvös Loránd University2
University of Dundee2
University of Tartu2
Institute of Food Safety, Animal Health and Environment “BIOR”1
University of Eastern Finland1
University of Pretoria1