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Le Clercq LS, Grobler JP, Kotzé A, Dalton DL. Dataset generated in a systematic review and meta-analysis of biological clocks as age estimation markers in animal ecology. Data Brief 2023; 51:109615. [PMID: 37822884 PMCID: PMC10562661 DOI: 10.1016/j.dib.2023.109615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 09/18/2023] [Accepted: 09/19/2023] [Indexed: 10/13/2023] Open
Abstract
The dataset comprises a comprehensive systematic review and meta-analysis exploring the utility of biological clocks as age estimation markers in the context of animal ecology. The systematic review adhered to PRISMA guidelines and employed optimized Boolean search strings to retrieve relevant studies from Scopus and Dimensions databases. A total of 78 methylation studies and 108 telomere studies were included after rigorous screening. Effect sizes were computed, and statistical transformations were applied when necessary, ensuring compatibility for meta-analysis. Data from these studies were meticulously collected, encompassing statistical measures, study attributes, and additional biological information. The dataset comprises several folders, carefully organized to facilitate access and understanding. It contains raw and processed data used in the systematic review and meta-analysis, including Boolean search strings, database search results, citation network analysis data, PRISMA statements, extracted study data, and input data for meta-analysis. Each folder's contents are described in detail, ensuring clarity and reusability. This dataset aggregates primary research studies spanning diverse ecosystems and taxa, providing a valuable resource for researchers, biodiversity managers and policymakers. This dataset offers a wealth of information and analysis potential for researchers studying age estimation markers in animal ecology, serving as a robust foundation for future investigations and reviews in this evolving field.
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Affiliation(s)
- Louis-Stéphane Le Clercq
- South African National Biodiversity Institute, Pretoria 0001, South Africa
- Department of Genetics, University of the Free State, Bloemfontein 9300, South Africa
| | - J. Paul Grobler
- Department of Genetics, University of the Free State, Bloemfontein 9300, South Africa
| | - Antoinette Kotzé
- South African National Biodiversity Institute, Pretoria 0001, South Africa
- Department of Genetics, University of the Free State, Bloemfontein 9300, South Africa
| | - Desiré Lee Dalton
- School of Health and Life Sciences, Teesside University, Middlesbrough TS1 3BA, United Kingdom
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Le Clercq LS, Kotzé A, Grobler JP, Dalton DL. Biological clocks as age estimation markers in animals: a systematic review and meta-analysis. Biol Rev Camb Philos Soc 2023; 98:1972-2011. [PMID: 37356823 DOI: 10.1111/brv.12992] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 06/04/2023] [Accepted: 06/08/2023] [Indexed: 06/27/2023]
Abstract
Various biological attributes associated with individual fitness in animals change predictably over the lifespan of an organism. Therefore, the study of animal ecology and the work of conservationists frequently relies upon the ability to assign animals to functionally relevant age classes to model population fitness. Several approaches have been applied to determining individual age and, while these methods have proved useful, they are not without limitations and often lack standardisation or are only applicable to specific species. For these reasons, scientists have explored the potential use of biological clocks towards creating a universal age-determination method. Two biological clocks, tooth layer annulation and otolith layering have found universal appeal. Both methods are highly invasive and most appropriate for post-mortem age-at-death estimation. More recently, attributes of cellular ageing previously explored in humans have been adapted to studying ageing in animals for the use of less-invasive molecular methods for determining age. Here, we review two such methods, assessment of methylation and telomere length, describing (i) what they are, (ii) how they change with age, and providing (iii) a summary and meta-analysis of studies that have explored their utility in animal age determination. We found that both attributes have been studied across multiple vertebrate classes, however, telomere studies were used before methylation studies and telomere length has been modelled in nearly twice as many studies. Telomere length studies included in the review often related changes to stress responses and illustrated that telomere length is sensitive to environmental and social stressors and, in the absence of repair mechanisms such as telomerase or alternative lengthening modes, lacks the ability to recover. Methylation studies, however, while also detecting sensitivity to stressors and toxins, illustrated the ability to recover from such stresses after a period of accelerated ageing, likely due to constitutive expression or reactivation of repair enzymes such as DNA methyl transferases. We also found that both studied attributes have parentally heritable features, but the mode of inheritance differs among taxa and may relate to heterogamy. Our meta-analysis included more than 40 species in common for methylation and telomere length, although both analyses included at least 60 age-estimation models. We found that methylation outperforms telomere length in terms of predictive power evidenced from effect sizes (more than double that observed for telomeres) and smaller prediction intervals. Both methods produced age correlation models using similar sample sizes and were able to classify individuals into young, middle, or old age classes with high accuracy. Our review and meta-analysis illustrate that both methods are well suited to studying age in animals and do not suffer significantly from variation due to differences in the lifespan of the species, genome size, karyotype, or tissue type but rather that quantitative method, patterns of inheritance, and environmental factors should be the main considerations. Thus, provided that complex factors affecting the measured trait can be accounted for, both methylation and telomere length are promising targets to develop as biomarkers for age determination in animals.
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Affiliation(s)
- Louis-Stéphane Le Clercq
- South African National Biodiversity Institute, P.O. Box 754, Pretoria, 0001, South Africa
- Department of Genetics, University of the Free State, P.O. Box 339, Bloemfontein, 9300, South Africa
| | - Antoinette Kotzé
- South African National Biodiversity Institute, P.O. Box 754, Pretoria, 0001, South Africa
- Department of Genetics, University of the Free State, P.O. Box 339, Bloemfontein, 9300, South Africa
| | - J Paul Grobler
- Department of Genetics, University of the Free State, P.O. Box 339, Bloemfontein, 9300, South Africa
| | - Desiré Lee Dalton
- School of Health and Life Sciences, Teesside University, Middlesbrough, TS1 3BA, UK
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Kärkkäinen T, Laaksonen T, Burgess M, Cantarero A, Martínez‐Padilla J, Potti J, Moreno J, Thomson RL, Tilgar V, Stier A. Population differences in the length and early-life dynamics of telomeres among European pied flycatchers. Mol Ecol 2022; 31:5966-5978. [PMID: 34875134 PMCID: PMC9788103 DOI: 10.1111/mec.16312] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 11/09/2021] [Accepted: 12/01/2021] [Indexed: 01/31/2023]
Abstract
Telomere length and shortening rate are increasingly being used as biomarkers for long-term costs in ecological and evolutionary studies because of their relationships with survival and fitness. Both early-life conditions and growth, and later-life stressors can create variation in telomere shortening rate. Studies on between-population telomere length and dynamics are scarce, despite the expectation that populations exposed to varying environmental constraints would present divergent telomere length patterns. The pied flycatcher (Ficedula hypoleuca) is a passerine bird breeding across Eurasia (from Spain to western Siberia) and migrating through the Iberian Peninsula to spend the nonbreeding period in sub-Saharan Africa. Thus, different populations show marked differences in migration distance. We studied the large-scale variation of telomere length and early-life dynamics in the pied flycatcher by comparing six European populations across a north-south gradient (Finland, Estonia, England and Spain) predicting a negative effect of migration distance on adult telomere length, and of nestling growth on nestling telomere dynamics. There were clear population differences in telomere length, with English birds from midlatitudes having the longest telomeres. Telomere length did not thus show consistent latitudinal variation and was not linearly linked to differences in migration distance. Early-life telomere shortening rate tended to vary between populations. Fast growth was associated with shorter telomeres in the early life, but faster nestling growth affected telomeres more negatively in northern than southern populations. While the sources of between-population differences in telomere-related biology remain to be more intensively studied, our study illustrates the need to expand telomere studies at the between-population level.
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Affiliation(s)
| | | | - Malcolm Burgess
- RSPB Centre for Conservation ScienceSandyUK,Centre for Research in Animal BehaviourUniversity of ExeterExeterUK
| | - Alejandro Cantarero
- Department of BiologyUniversity of TurkuTurkuFinland,Department of Evolutionary EcologyMuseo Nacional de Ciencias Naturales (CSIC)MadridSpain
| | - Jesús Martínez‐Padilla
- Department of Biological Conservation and Ecosystem RestorationPyrenean Institute of Ecology (CSIC)JacaSpain
| | - Jaime Potti
- Department of Evolutionary EcologyEstación Biológica de Doñana (CSIC)SevilleSpain
| | - Juan Moreno
- Department of Evolutionary EcologyMuseo Nacional de Ciencias Naturales (CSIC)MadridSpain
| | - Robert L. Thomson
- Department of BiologyUniversity of TurkuTurkuFinland,Department of Biological SciencesUniversity of Cape TownRondeboschSouth Africa,FitzPatrick Institute of African OrnithologyDST‐NRF Centre of ExcellenceUniversity of Cape TownRondeboschSouth Africa
| | - Vallo Tilgar
- Department of ZoologyInstitute of Ecology and Earth SciencesUniversity of TartuTartuEstonia
| | - Antoine Stier
- Department of BiologyUniversity of TurkuTurkuFinland,Univ LyonUniversité Claude Bernard Lyon 1CNRSENTPEUMR 5023 LEHNAVilleurbanneFrance
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Hansen E, Skotnes T, Bustnes JO, Helander B, Eulaers I, Sun J, Covaci A, Bårdsen BJ, Zahn S, Criscuolo F, Bourgeon S. Telomere length in relation to persistent organic pollutant exposure in white-tailed eagle (Haliaeetus albicilla) nestlings from Sweden sampled in 1995-2013. ENVIRONMENTAL RESEARCH 2022; 208:112712. [PMID: 35016866 DOI: 10.1016/j.envres.2022.112712] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 12/01/2021] [Accepted: 01/06/2022] [Indexed: 06/14/2023]
Abstract
Telomeres are used as biomarkers of vertebrate health because of the link between their length, lifespan, and survival. Exposure to environmental stressors appears to alter telomere dynamics, but little is known about telomere length and persistent organic pollutant (POP) exposure in wildlife. The white-tailed eagle (WTE; Haliaeetus albicilla) is an avian top predator that accumulates high levels of POPs and may subsequently suffer adverse health effects. Here we study the Baltic WTE population that is well documented to have been exposed to large contaminant burdens, thereby making it a promising candidate species for analyzing pollutant-mediated effects on telomeres. We investigated telomere lengths in WTE nestlings (n = 168) over 19 years and examined legacy POP concentrations (organochlorines and polybrominated diphenyl ethers) in whole blood and serum as potential drivers of differences in telomere length. Although we detected significant year-to-year variations in telomere lengths among the WTE nestlings, telomere lengths did not correlate with any of the investigated POP concentrations of several classes. Given that telomere lengths did not associate with POP contamination in the Baltic WTE nestlings, we propose that other environmental and biological factors, which likely fluctuate on a year-to-year basis, could be more important drivers of telomere lengths in this population.
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Affiliation(s)
- Elisabeth Hansen
- UiT - the Arctic University of Norway, Department of Arctic and Marine Biology, Hansine Hansens Veg 18, NO-9019 Tromsø, Norway.
| | - Tove Skotnes
- UiT - the Arctic University of Norway, Department of Arctic and Marine Biology, Hansine Hansens Veg 18, NO-9019 Tromsø, Norway; Norwegian Institute for Nature Research (NINA), Framsenteret, Hjalmar Johansens Gate 14, NO-9296 Tromsø, Norway
| | - Jan Ove Bustnes
- Norwegian Institute for Nature Research (NINA), Framsenteret, Hjalmar Johansens Gate 14, NO-9296 Tromsø, Norway
| | - Björn Helander
- Swedish Museum of Natural History, Department of Environmental Research and Monitoring, Box 50007, SE-10405 Stockholm, Sweden
| | - Igor Eulaers
- Department of Bioscience, Aarhus University, Frederiksborgvej 399, PO Box 358, DK-4000 Roskilde, Denmark
| | - Jiachen Sun
- School of Environment, Jinan University, West Huangpu Avenue 601, 510632 Guangzhou, Guangdong, China
| | - Adrian Covaci
- Toxicological Centre, Department of Pharmaceutical Sciences, University of Antwerp, Universiteitsplein 1, BE-2610 Wilrijk, Belgium
| | - Bård-Jørgen Bårdsen
- Norwegian Institute for Nature Research (NINA), Framsenteret, Hjalmar Johansens Gate 14, NO-9296 Tromsø, Norway
| | - Sandrine Zahn
- Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - Francois Criscuolo
- Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - Sophie Bourgeon
- UiT - the Arctic University of Norway, Department of Arctic and Marine Biology, Hansine Hansens Veg 18, NO-9019 Tromsø, Norway
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Sánchez-Montes G, Martínez-Solano Í, Díaz-Paniagua C, Vilches A, Ariño AH, Gomez-Mestre I. Telomere attrition with age in a wild amphibian population. Biol Lett 2020; 16:20200168. [PMID: 32673551 PMCID: PMC7423040 DOI: 10.1098/rsbl.2020.0168] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 06/16/2020] [Indexed: 12/16/2022] Open
Abstract
Telomere shortening with age has been documented in many organisms, but few studies have reported telomere length measurements in amphibians, and no information is available for growth after metamorphosis, nor in wild populations. We provide both cross-sectional and longitudinal evidence of net telomere attrition with age in a wild amphibian population of natterjack toads (Epidalea calamita). Based on age-estimation by skeletochronology and qPCR telomere length measurements in the framework of an individual-based monitoring programme, we confirmed telomere attrition in recaptured males. Our results support that toads experience telomere attrition throughout their ontogeny, and that most attrition occurs during the first 1-2 years. We did not find associations between telomere length and inbreeding or body condition. Our results on telomere length dynamics under natural conditions confirm telomere shortening with age in amphibians and provide quantification of wide telomere length variation within and among age-classes in a wild breeding population.
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Affiliation(s)
- Gregorio Sánchez-Montes
- Museo Nacional de Ciencias Naturales, CSIC, c/ José Gutiérrez Abascal, 2, 28006 Madrid, Spain
| | - Íñigo Martínez-Solano
- Museo Nacional de Ciencias Naturales, CSIC, c/ José Gutiérrez Abascal, 2, 28006 Madrid, Spain
| | - Carmen Díaz-Paniagua
- Ecology, Evolution, and Development Group, Doñana Biological Station, CSIC, c/ Américo Vespucio 26, 41092 Seville, Spain
| | - Antonio Vilches
- Department of Environmental Biology, University of Navarra, c/ Irunlarrea, 1, 31008 Pamplona, Spain
| | - Arturo H. Ariño
- Department of Environmental Biology, University of Navarra, c/ Irunlarrea, 1, 31008 Pamplona, Spain
| | - Ivan Gomez-Mestre
- Ecology, Evolution, and Development Group, Doñana Biological Station, CSIC, c/ Américo Vespucio 26, 41092 Seville, Spain
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Contrasting seasonal patterns of telomere dynamics in response to environmental conditions in the ectothermic sand lizard, Lacerta agilis. Sci Rep 2020; 10:182. [PMID: 31932620 PMCID: PMC6957525 DOI: 10.1038/s41598-019-57084-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 12/17/2019] [Indexed: 01/27/2023] Open
Abstract
Telomeres, the protective, terminal parts of the chromosomes erode during cell division and as a result of oxidative damage by reactive oxygen species (ROS). Ectotherms rely on the ambient temperature for maintaining temperature-dependent metabolic rate, regulated through behavioural thermoregulation. Their temperature-dependant metabolism, hence also the ROS production, is indirectly regulated through thermoregulation. Consequently, a potential causal chain affecting telomere length and attrition is: temperature (in particular, its deviation from a species-specific optimum) – metabolism - ROS production – anti-oxidation - telomere erosion. We measured telomere length in sand lizards (Lacerta agilis) using qPCR on blood samples from 1998–2006. Effects of climatological parameters (mean temperature and average sunshine hours) in the summer and winter preceding telomere sampling were used as predictors of telomere length in mixed model analysis. During the lizards’ active period (summer), there was a largely negative effect of mean temperature and sun on telomere length, whereas a combined measure of age and size (head length) was positively related to telomere length. During the inactive period of lizards (winter), the results were largely the opposite with a positive relationship between temperature and sunshine hours and telomere length. In all four cases, thermal and age effects on telomere length appeared to be non-linear in the two sexes and seasons, with complex response surface effects on telomere length from combined age and thermal effects.
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