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Genomic Footprints of Hybridisation in North Atlantic Eels (Anguilla anguilla and A. rostrata).
Mol Ecol
January 2025
Department of Biology, Aarhus University, Aarhus C, Denmark.
Understanding interspecific introgressive hybridisation and the biological significance of introgressed variation remains an important goal in population genomics. European (Anguilla anguilla) and American eel (A. rostrata) represent a remarkable case of hybridisation.
View Article and Find Full Text PDFPopulation variability across geographical ranges: perspectives and challenges.
Proc Biol Sci
January 2025
Department of Biological Sciences, University of South Carolina, Columbia, SC 29208, USA.
Populations fluctuate over time and across geographical space, and understanding how different factors contribute to population variability is a central goal in population ecology. There is a particular interest in identifying trends of population variability within geographical ranges as population densities of species can fluctuate substantially across geographical space. A common assumption is that populations vary more near species geographical range edges because of unsuitable environments and higher vulnerability to environmental variability in these areas.
View Article and Find Full Text PDFGeographic differences in the phenology of gonadal development and moult, but not of egg laying, are genetically based in a small songbird.
Proc Biol Sci
January 2025
Department of Animal Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, The Netherlands.
To forecast how fast populations can adapt to climate change, it is essential to determine the evolutionary potential of different life-cycle stages under selection. In birds, timing of gonadal development and moult are primarily regulated by photoperiod, while laying date is highly phenotypically plastic to temperature. We tested whether geographic variation in phenology of these life-cycle events between populations of great tits () has a genetic basis, indicating that contemporary genetic adaptation is possible.
View Article and Find Full Text PDFLatitudinal cline of ocean dependence in a diadromous fish.
Proc Biol Sci
January 2025
Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, Chiba 277-8564, Japan.
Article Synopsis
- Diadromous fishes show a pattern of reliance on oceans in high latitudes versus rivers in low latitudes, driven by differences in aquatic productivity.
- Research suggests that migratory salmonids exhibit greater ocean dependency and weight gain at higher latitudes, while freshwater growth decreases with latitude.
- These findings highlight variations in life history among salmonid migrants and suggest the existing definition of anadromy might not adequately reflect the complexities of river-ocean migration.
Cryptic genetic diversity and molecular detection of Trypanosoma theileri complex in the deer fly Chrysops dispar Fabricius from Thailand.
Trop Biomed
December 2024
Department of Biology, Faculty of Science, Mahasarakham University, Kantharawichai District, Mahasarakham 44150, Thailand.
The deer fly (Diptera, Tabanidae), Chrysops dispar Fabricius is a common and widespread pest and vector species transmitting pathogens to animals including economically significant livestock. However, there is only limited information on genetic diversity, which crucial for understanding disease epidemiology. In this study, we examined genetic diversity of C.
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