Relationship between telomere dynamics and movement and behavior during winter in the thick‑billed murre

Young, Rebecca C.; Orben, Rachael A.; Will, Alexis; Kitaysky, Alexander S.

doi:10.3354/meps12022

Cited by 11 publications

(13 citation statements)

References 46 publications

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“…, Young et al. ). Other studies, however, did not detect relevant effects of breeding on the stress condition of the individuals (Bourgeon et al.…”

Section: Discussionmentioning

confidence: 99%

“…Finally, and to the best of our knowledge, only one study has considered sampling the same individuals in different periods (Young et al. ). In our opinion, this prevents most previous research from drawing conclusions on the durability/persistence of such carryover effects.…”

Section: Discussionmentioning

confidence: 99%

“…), telomere length (Young et al. ), and/or diverse enzyme activities (Navarro et al. , Lecomte et al.…”

Section: Discussionmentioning

confidence: 99%

“…In general, breeding effort and success are well-known stressors on long-lived species, and CORT levels quantified in specific tissues are often reported as a measurable proxy for the severity of such stressful responses (Bortolotti et al 2008. Several recent studies on seabirds have reported on effects of breeding performances on the physiological stress that individuals experienced in different periods along the annual cycle by measuring the CORT concentration in specific feathers (Schultner et al 2014, Sorenson et al 2017, Young et al 2017. Other studies, however, did not detect relevant effects of breeding on the stress condition of the individuals (Bourgeon et al 2014(Bourgeon et al , P erez et al 2016.…”

Section: Carryover Effects Of Breeding On the Stress Condition Of Indmentioning

confidence: 99%

“…It is also known that such stress markers are deposited and measurable in keratinized tissues, such as feathers, and that the amount of CORT deposited in these tissues is correlated with stress levels experienced by individuals during tissue growth (Bortolotti et al 2008, Jenni-eiermann et al 2015, Aharon-Rotman et al 2017. Thus, stressful events that occurred during molting (and retained in bird feathers) could act as mediators of behavior and performance in the subsequent season (Bourgeon et al 2014, Harms et al 2015, P erez et al 2016, Crossin et al 2017, Young et al 2017.…”

Section: Introductionmentioning

confidence: 99%

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Costs of breeding are rapidly buffered and do not affect migratory behavior in a long‐lived bird species

Ramos

Llabrés

Monclús

et al. 2018

Ecology

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Life history theory states that individual fitness in one stage of life is conditioned by what occurred in previous stages. In migratory species, reproductive effort during breeding has often been found to influence body condition, molt schedule, self-provisioning and migration of individuals in subsequent seasons (i.e., carryover effects of breeding). However, there is a current uncertainty in understanding how long-distance migrants trade off among such energy-demanding activities (i.e., breeding, molting and migrating). To provide evidence to the field, we experimentally reduced the parental effort of a long-lived Procellariform, the Cory's shearwater (Calonectris borealis), by inducing failure at the incubation stage. Treatment and control birds were tracked during their subsequent migration by means of light-level and immersion loggers and sampled for six specific feathers (molted at different periods along the migratory cycle) upon the recovery of the loggers 1 yr later. Feathers were used to perform stable isotope analysis (SIA) and determine corticosterone levels (CORT). By these means, we evaluated the effect of breeding effort on migratory strategy, at-sea activity patterns, molt patterns, and levels of stress experienced by birds along the non-breeding period. We did not detect any difference between birds in the induced failure group and successful breeders in terms of spatio-temporal distribution: all birds shared common foraging areas throughout the study period and the timing of major phenological events did not differ. Failed birds significantly advanced their molt, as revealed by SIA and flying activity patterns. The stress levels of failed birds, inferred through CORT concentrations in feathers, were found to be consistently lower than in successful breeders, through the end of the breeding to the non-breeding period. Thus, we provide robust evidence that the costs of reproduction can be physiologically mediated from the breeding to the non-breeding period through molting schedules and CORT levels. However, we failed to detect clear effects on migratory behavior or subsequent breeding success, suggesting that costs of breeding in long-lived species may be rapidly buffered during the post-breeding period, as would be expected from life history theory.

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“…, Young et al. ). Other studies, however, did not detect relevant effects of breeding on the stress condition of the individuals (Bourgeon et al.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…), telomere length (Young et al. ), and/or diverse enzyme activities (Navarro et al. , Lecomte et al.…”

Section: Discussionmentioning

confidence: 99%

Section: Carryover Effects Of Breeding On the Stress Condition Of Indmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Costs of breeding are rapidly buffered and do not affect migratory behavior in a long‐lived bird species

Ramos

Llabrés

Monclús

et al. 2018

Ecology

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show abstract

Breeding together, wintering an ocean apart: Foraging ecology of the northern Bering Sea thick-billed and common murres in years of contrasting sea-ice conditions

et al. 2021

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Do glucocorticoids mediate the link between environmental conditions and telomere dynamics in wild vertebrates? A review

Angelier

Costantini

Blévin

et al. 2018

General and Comparative Endocrinology

142

184

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Following the discoveries of telomeres and of their implications in terms of health and ageing, there has been a growing interest into the study of telomere dynamics in wild vertebrates. Telomeres are repeated sequences of non-coding DNA located at the terminal ends of chromosomes and they play a major role in maintaining chromosome stability. Importantly, telomeres shorten over time and shorter telomeres seem to be related with lower survival in vertebrates. Because of this potential link with longevity, it is crucial to understand not only the ecological determinants of telomere dynamics but also the regulatory endocrine mechanisms that may mediate the effect of the environment on telomeres. In this paper, we review the relationships that link environmental conditions, glucocorticoids (GC, the main hormonal mediator of allostasis) and telomere length in vertebrates. First, we review current knowledge about the determinants of inter-individual variations in telomere length. We emphasize the potential strong impact of environmental stressors and predictable life-history events on telomere dynamics. Despite recent progress, we still lack crucial basic data to fully understand the costs of several life-history stages and biotic and abiotic factors on telomere length. Second, we review the link that exists between GCs, oxidative stress and telomere dynamics in vertebrates. Although circulating GC levels may be closely and functionally linked with telomere dynamics, data are still scarce and somewhat contradictory. Further laboratory and field studies are therefore needed not only to better assess the proximate link between GC levels and telomere dynamics, but also to ultimately understand to what extent GCs and telomere length could be informative to measure the fitness costs of specific life-history stages and environmental conditions. Finally, we highlight the importance of exploring the functional links that may exist between coping styles, the GC stress response, and telomere dynamics in a life-history framework. To conclude, we raise new hypotheses regarding the potential of the GC stress response to drive the trade-off between immediate survival and telomere protection.

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Relationship between telomere dynamics and movement and behavior during winter in the thick‑billed murre

Cited by 11 publications

References 46 publications

Costs of breeding are rapidly buffered and do not affect migratory behavior in a long‐lived bird species

Costs of breeding are rapidly buffered and do not affect migratory behavior in a long‐lived bird species

Breeding together, wintering an ocean apart: Foraging ecology of the northern Bering Sea thick-billed and common murres in years of contrasting sea-ice conditions

Do glucocorticoids mediate the link between environmental conditions and telomere dynamics in wild vertebrates? A review

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