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Animals within social groups respond to costs and benefits of sociality by adjusting the proportion of time they spend in close proximity to other individuals in the group (cohesion). Variation in cohesion between individuals, in turn, shapes important group‐level processes such as subgroup formation and fission–fusion dynamics. Although critical to animal sociality, a comprehensive understanding of the factors influencing coh...
Prolonging survival in good health is a fundamental societal goal. However, the leading determinants of disability-free survival in healthy older people have not been well established. Data from ASPREE, a bi-national placebo-controlled trial of aspirin with 4.7 years median follow-up, was analysed. At enrolment, participants were healthy and without prior cardiovascular events, dementia or persistent physical disability. Disab...
Evidence of inbreeding depression but not inbreeding avoidance in a natural house sparrow populationNARA Subscribed
Inbreeding is common in small and threatened populations and often has a negative effect on individual fitness and genetic diversity. Thus, inbreeding can be an important factor affecting the persistence of small populations. In this study, we investigated the effects of inbreeding on fitness in a small, wild population of house sparrows ( Passer domesticus ) on the island of Aldra, Norway. The population was founded in 1998 b...
Changes in reproductive physiology and behaviour over the nesting cycle in male three‐spined sticklebacksNARA Subscribed
Plasma 11‐Ketotestosterone (11 KT) and testosterone (T) levels and spiggin‐mRNA levels, as well as the kidney‐somatic index ( I K ) were measured in sexual males and in paternal males at the middle (5 days paternal) and at the end (8 days paternal with hatched eggs) of the nesting cycle in three‐spined sticklebacks Gasterosteus aculeatus from two populations. Glueing (using threads of 11 KT induced kidney‐protein spiggin) and...
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