5 Works

Data from: Phenotypic and genetic divergence among harbour porpoise populations associated with habitat regions in the North Sea and adjacent seas.

Carlos De Luna Lopez, Simon J. Goodman, Oliver Thatcher, Paul D. Jepson, Liselotte Andersen, Krystal Tolley & Alan R. Hoelzel
Determining the mechanisms that generate population structure is essential to the understanding of speciation and the evolution of biodiversity. Here, we investigate a geographic range that transects two habitat gradients, the North Sea to North Atlantic transition, and the temperate to sub-polar regions. We studied the harbour porpoise (Phocoena phocoena), a small odontocete inhabiting both sub-polar and temperate waters. To assess differentiation among putative populations we measured morphological variation at cranial traits (N=462 individuals) and...

Data from: Humidity affects genetic architecture of heat resistance in Drosophila melanogaster

Oleg A. Bubliy, Torsten N. Kristensen, Vanessa Kellermann & Volker Loeschcke
Laboratory experiments on Drosophila have often demonstrated increased heritability for morphological and life-history traits under environmental stress. We used parent-offspring comparisons to examine the impact of humidity levels on the heritability of a physiological trait, resistance to heat, measured as knockdown time at constant temperature. Drosophila melanogaster were reared under standard non-stressful conditions and heat-shocked as adults at extreme high or low humidity. Mean knockdown time was decreased in the stressful dry environment but there...

Data from: Task specialization in two social spiders, Stegodyphus sarasinorum (Eresidae) and Anelosimus eximius (Theridiidae).

Virginia Settepani, Lena Grinsted, Jørgen Pedersen, Jens Jensen, Trine Bilde, J. Granfeldt & J. L. Jensen
Understanding the social organization of group living organisms is crucial for the comprehension of the underlying selective mechanisms involved in the evolution of cooperation. Division of labour and caste formation is restricted to eusocial organisms, but behavioural asymmetries and reproductive skew is common in other group living animals. Permanently social spiders form highly related groups with reproductive skew and communal brood care. We investigated task differentiation in non-reproductive tasks in two permanently and independently derived...

Data from: Hsp70 protein levels and thermotolerance in Drosophila subobscura: a reassessment of the thermal co-adaptation hypothesis

Gemma Calabria, Olga Dolgova, Carla Rego, Luís E. Castañeda, Enrico L. Rezende, Joan Balanyà, Marta Pascual, Jesper G. Sørensen, Volker Loeschcke & Mauro Santos
Theory predicts that geographic variation in traits and genes associated with climatic adaptation may be initially driven by the correlated evolution of thermal preference and thermal sensitivity. This assumes that an organism’s preferred body temperature corresponds with the thermal optimum in which performance is maximized; hence, shifts in thermal preferences affect the subsequent evolution of thermal-related traits. Drosophila subobscura evolved world-wide latitudinal clines in several traits including chromosome inversion frequencies, with some polymorphic inversions being...

Data from: Constant, cycling, hot and cold thermal environments: strong effects on mean viability but not on genetic estimates

T. Ketola, V. Kellermann, T. N. Kristenson & V. Loeschcke
It has frequently been suggested that trait heritabilities are environmentally sensitive, and there are genetic trade-offs between tolerating different environments such as hot and cold or constant and fluctuating temperatures. Future climate predictions suggest an increase in both temperatures and their fluctuations. How species will respond to these changes is uncertain, particularly as there is a lack of studies which compare genetic performances in constant vs. fluctuating environments. In this study, we used a nested...

Registration Year

  • 2012
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Affiliations

  • Aarhus University
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  • South African National Biodiversity Institute
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  • Durham University
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  • University of Barcelona
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  • University of Leeds
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  • Zoological Society of London
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  • University of the Azores
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  • Autonomous University of Barcelona
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  • University of Jyväskylä
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