...Lindsay E. Martin; Monzerrat Ruiz; Julián F. Hillyer ABSTRACT Mosquitoes cannot use metabolism to regulate their body temperature and therefore climate warming is altering their physiology. Mosquitoes also experience a physiological decline with aging, a phenomenon called senescence. Because both...

... ). Diving into old age: muscular senescence in a large-bodied, long-lived mammal, the Weddell seal ( Leptonychotes weddellii ) . J. Exp. Biol. 212 , 790 - 796 . 10.1242/jeb.025387 Holt , M. M. , Noren , D. P. , Dunkin , R. C. and Williams , T. M. ( 2015 ). Vocal performance...

... populations, and that these differences might be an overlooked legacy of past biogeographic processes. Antioxidant Oxidative stress Range expansion Senescence Vertebrates Ageing is a ubiquitous process of decline in physiological function, survival and fecundity with advancing age ( de...

... senescence in this population. Additionally, we detected mixed evidence for a trade-off between reproduction and immune health. * Present address: Biology Department, Luther College, 700 College Drive, Decorah, IA 52101, USA. ‡ Author for correspondence ( [email protected] ) Competing...

... the mechanistic basis of fitness costs. Fourth, I propose the ‘redox signalling hypothesis’ of life history to complement the current ‘oxidative stress hypothesis’ of life history. The latter states that oxidative damage underlies trade-offs because it affects traits like growth, reproduction or cell senescence...

... and accelerated aging. We contrasted markers of oxidative damage with antioxidant profiles across age and sex for propulsive (longissismus dorsi) and maneuvering (pectoralis) muscles of Weddell seals to determine whether previously observed morphological senescence is associated with oxidative stress...

... analyses in other tissues demonstrate that these molecular changes are not generalized markers of senescence, but instead, specific features of the optic glands. Our study expands the classic optic gland–pituitary gland analogy and more specifically, it indicates that, rather than a single ‘self-destruct...

...-1-1/ Highlighted Article: Faster embryonic growth rate, manipulated using incubation temperature, results in shorter telomere length at hatching in a wild bird species, the common tern. Ageing Embryonic development Cell division Life-history trade-off Lifespan Senescence...

...Joseph W. Margotta; Stephen P. Roberts; Michelle M. Elekonich ABSTRACT Frequent and highly aerobic behaviors likely contribute to naturally occurring stress, accelerate senescence and limit lifespan. To understand how the physiological and cellular mechanisms that determine the onset and duration...

...-life performance. Telomere length Life-history evolution Senescence Telomere dynamics Cohort effects One of the principal aims of evolutionary ecology is to understand the mechanisms underlying individual variation in longevity and fecundity. Telomere dynamics link cellular processes...

...Steven J. Lane; W. Anthony Frankino; Michelle M. Elekonich; Stephen P. Roberts The effects of flight behavior on physiology and senescence may be profound in insects because of the extremely high metabolic costs of flight. Flight capacity in insects decreases with age; in contrast, limiting flight...

... directly causes somatic damage. Oxidative stress, an overproduction of reactive oxygen species in relation to cellular defences, can correlate with reproductive investment and has been implicated as a pathway leading to senescence. This has led to the suggestion that this aspect of physiology could...

... the transition between short-lived and extremely long-lived phenotypes with negligible senescence. Among honey bee workers, short to intermediate lifespans are typical for summer castes, while the winter caste can live up to 10 times longer. For summer castes, experimental interventions could predictably...

... of the Glanville fritillary butterfly ( Melitaea cinxia ). Measurements of MR peak showed significant repeatability. Senescence occurred only shortly before death. RMR showed a U-shaped relationship with age and very low repeatability. Intraspecific association between metabolic rates and lifespan was tested under...

...Christina C. Tolfsen; Nicholas Baker; Claus Kreibich; Gro V. Amdam SUMMARY Honeybees ( Apis mellifera ) senesce within 2 weeks after they discontinue nest tasks in favour of foraging. Foraging involves metabolically demanding flight, which in houseflies ( Musca domestica ) and fruit flies...

...F. Wolschin; D. Münch; G. V. Amdam SUMMARY Among insects, learning is particularly well studied in the fruit fly Drosophila melanogaster and the honeybee Apis mellifera . A senescence-dependent decline in classic pavlovian conditioning is demonstrated for both species. To understand how aging...

... at the transition from nursing to foraging behavior. Following this transition, the age-dependent development and senescence of maximal flight capacity in foragers reflects the ability, when aerodynamically challenged, to increaseΦ while simultaneously maintaining n . Importantly, our experiment does not allow us...

... 2007 ageing basal metabolic rate body condition disposable soma theory diurnal rhythm long-lived seabirds oxidative stress hypothesis Pagodroma nivea senescence Ageing (or senescence) is a decline in physiological functioning with age accompanied by a decrease in reproductive...

... extension senescence Blastogenesis, which in some colonial tunicate species is a cyclical and synchronized organogenesis process, is an indispensable developmental operation in modular organisms. This phenomenon is particularly important in the life history of the botryllid ascidians (Family...

..., and there was a loss or reduction of spontaneous locomotion. However, after decapitation, tactile stimulation of senescent animals evoked responses that are typical of headless cockroaches of younger ages ( Schaefer and Ritzmann,2001 ). Age-related changes in higher centers may disrupt normal descending inputs, which...