8 Works

Data from: Age-related sex differences in body condition and telomere dynamics of red-sided garter snakes

Nicky Rollings, Emily J. Uhrig, Randolf W. Krohmer, Heather L. Waye, Robert T. Mason, Mats Olsson, Camilla M. Whittington, Christopher R. Friesen & Randolph W. Krohmer
Life-history strategies vary dramatically between the sexes, which may drive divergence in sex-specific senescence and mortality rates. Telomeres are tandem nucleotide repeats that protect the ends of chromosomes from erosion during cell division. Telomeres have been implicated in senescence and mortality because they tend to shorten with stress, growth and age. We investigated age-specific telomere length in female and male red-sided garter snakes, Thamnophis sirtalis parietalis. We hypothesized that age-specific telomere length would differ between...

Data from: Aerobic power and flight capacity in birds: a phylogenetic test of the heart-size hypothesis

Roberto F. Nespolo, Cesar González-Lagos, Jaiber J. Solano-Iguaran, Magnus Elfwing, Alvaro Garitano-Zavala, Santiago Mañosa, Juan Carlos Alonso & Jordi Altamiras
Flight capacity is one of the most important innovations in animal evolution; it only evolved in insects, birds, mammals and the extinct pterodactyls. Given that powered flight represents a demanding aerobic activity, an efficient cardiovascular system is essential for the continuous delivery of oxygen to the pectoral muscles during flight. It is well known that the limiting step in the circulation is stroke volume (the volume of blood pumped from the ventricle to the body...

Data from: Personality remains: no effect of 3-week social status experience on personality in male fowl

Anna Favati, Eva Udén, Olle Leimar, Hanne Lovlie & Olof Leimar
Individuals often differ in behavior in a consistent way, i.e. show variation in personality. Understanding the processes explaining the emergence and maintenance of this variation is a major topic in the field of animal behavioral research. Recent theoretical models predict that differences in various 'states' can generate individual variation in behavior. Previous studies have mainly focused on endogenous states like metabolic rate or energy reserves, but theory also suggests that states based on social interactions...

Data from: Individual aggression, but not winner-loser effects, predicts social rank in male domestic fowl

Anna Favati, Hanne Løvlie & Olof Leimar
Many factors can affect the probability for an individual to obtain a high social rank, including size, weaponry, and behavioral attributes such as aggression. Recent experiences of winning or losing can also affect the chances of winning future contests, commonly referred to as “winner–loser effects”. Individuals often differ in behavior in a consistent way, including in aggression, thereby showing differences in personality. However, the relative importance of recent experience and aspects of personality in determining...

Data from: Relatedness and age reduce aggressive male interactions over mating in domestic fowl

Charlotte Rosher, Anna Favati, Rebecca Dean & Hanne Lovlie
Altruistic behaviour represents a fundamental challenge in evolutionary biology. It is often best understood through kin selection, where favourable behaviour is directed towards relatives. Kin selection can take place when males cooperate to enhance the reproductive success of relatives. Here, we focus on reduced male–male competition over mating as a case of cooperation, by examining male tolerance of matings by related and unrelated competitors. A suitable model for exploring whether relatedness affects male–male interactions over...

Data from: Experience buffers extrinsic mortality in a group-living bird species

Michael Griesser, Emeline Mourocq, Jonathan Barnaby, Katharine Bowegen, Sönke Eggers, Kevin Fletcher, Radoslav Kozma, Franziska Kurz, Anssi Laurila, Magdalena Nystrand, Enrico Sorato, Jan Ekman & Katharine M. Bowgen
Extrinsic mortality has a strong impact on the evolution of life-histories, prey morphology and behavioural adaptations, but for many animals the causes of mortality are poorly understood. Predation is an important driver of extrinsic mortality and mobile animals form groups in response to increased predation risk. Furthermore, in many species juveniles suffer higher mortality than older individuals, which may reflect a lower phenotypic quality, lower competitiveness, or a lack of antipredator or foraging skills. Here...

Data from: Taxonomic and functional turnover are decoupled in European peat bogs

Bjorn J. M. Robroek, Vincent E. J. Jassey, Richard J. Payne, Magalí Martí, Luca Bragazza, Albert Bleeker, Alexandre Buttler, Simon J. M. Caporn, Nancy B. Dise, Jens Kattge, Katarzyna Zając, Bo H. Svensson, Jasper Van Ruijven & Jos T. A. Verhoeven
In peatland ecosystems, plant communities mediate a globally significant carbon store. The effects of global environmental change on plant assemblages are expected to be a factor in determining how ecosystem functions such as carbon uptake will respond. Using vegetation data from 56 Sphagnum-dominated peat bogs across Europe, we show that in these ecosystems plant species aggregate into two major clusters that are each defined by shared response to environmental conditions. Across environmental gradients, we find...

Data from: Evolutionary associations between host traits and parasite load: insights from Lake Tanganyika cichlids

Alexander Hayward, Masahito Tsuboi, Christian Owusu, Kotrschal Alexander, Severine D. Buechel, Josefina Zidar, Charlie K. Cornwallis, Hanne Lovlie, Niclas Kolm & A. Kotrschal
Parasite diversity and abundance (parasite load) vary greatly among host species. However, the influence of host traits on variation in parasitism remains poorly understood. Comparative studies of parasite load have largely examined measures of parasite species richness and are predominantly based on records obtained from published data. Consequently, little is known about the relationships between host traits and other aspects of parasite load, such as parasite abundance, prevalence and aggregation. Meanwhile, understanding of parasite species...

Registration Year

  • 2017
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Affiliations

  • Linköping University
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  • Stockholm University
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  • Monash University
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  • Uppsala University
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  • Oregon State University
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  • Lund University
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  • University of Minnesota
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  • St. Francis Xavier University
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  • University of Bayreuth
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