{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T16:39:23Z","timestamp":1792600763202,"version":"4.5.0"},"reference-count":49,"publisher":"Oxford University Press (OUP)","license":[{"start":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T00:00:00Z","timestamp":1791158400000},"content-version":"am","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"funder":[{"DOI":"10.13039\/501100001665","name":"French National Research Agency","doi-asserted-by":"publisher","award":["CE02-0028"],"award-info":[{"award-number":["CE02-0028"]}],"id":[{"id":"10.13039\/501100001665","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Resources are limited and cannot be used for multiple functions simultaneously, leading to trade-offs between life-history traits. The detection of such trade-offs depends on resource acquisition (total amount of resources) and allocation (distribution of resources between traits). When among-individual variation in acquisition exceeds that of allocation, trade-offs tend to be masked. The availability of food resources is shaped by environmental conditions, and thus is likely to vary over time and space. Thus, notable differences can arise in the strength but also the detection of trade-offs within a single species. Yet, studies spanning multiple years and assessing trade-offs among several natural populations within an acquisition\u2013allocation framework remain relatively limited. We studied the well-known chick mass\u2013brood size trade-off in more than 2,000 broods in three populations of little owl (Athene noctua) during 11 years, to better understand spatiotemporal changes in life-history trade-offs. We found that the negative correlations between brood size and chick mass were detected in most but not all years in the three populations. The larger the variation in allocation compared to variation in acquisition, the more pronounced the trade-off was, and the pattern was similar for all populations. These results indicate that trade-offs are detectable among individuals across different ecological conditions, and that the detection is strongly influenced by the variance in acquisition. A promising avenue of research would be to include intrinsic factors known to influence chick mass\u2013brood size trade-offs, such as maternal age, breeding experience, or body condition.<\/jats:p>","DOI":"10.1093\/jeb\/voag098","type":"journal-article","created":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T15:02:40Z","timestamp":1791212560000},"source":"Crossref","is-referenced-by-count":0,"title":["Spatiotemporal variation of the chick mass-brood size trade-off in the little owl"],"prefix":"10.1093","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5337-7026","authenticated-orcid":false,"given":"B\u00e9r\u00e9nice","family":"Ambielle","sequence":"first","affiliation":[{"name":"Universit\u00e9 de Strasbourg, CNRS, IPHC, UMR7178, F-67000 , Strasbourg ,","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9433-2369","authenticated-orcid":false,"given":"Marl\u00e8ne","family":"Gamelon","sequence":"additional","affiliation":[{"name":"Universit\u00e9 Claude Bernard Lyon 1, CNRS, VetAgro Sup, UMR 5558 Biom\u00e9trie et Biologie Evolutive , Bat. G Mendel 43 bd du 11 Novembre 1918, 69622, Villeurbanne Cedex ,","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fran\u00e7ois","family":"Criscuolo","sequence":"additional","affiliation":[{"name":"Universit\u00e9 de Strasbourg, CNRS, IPHC, UMR7178, F-67000 , Strasbourg ,","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Olivier","family":"Hameau","sequence":"additional","affiliation":[{"name":"Ligue pour la protection des oiseaux Provence-Alpes-C\u00f4te d\u2019Azur , Buoux ,","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Muriel","family":"Lecomte","sequence":"additional","affiliation":[{"name":"R\u00e9seau Etudes Chev\u00eache , Vigny ,","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9475-4123","authenticated-orcid":false,"given":"Alexandre","family":"Millon","sequence":"additional","affiliation":[{"name":"Aix-Marseille Univ, CNRS, IRD, Avignon Univ, Institut M\u00e9diterran\u00e9en de Biodiversit\u00e9 et d\u2019Ecologie marine et continentale (IMBE) , Aix-en-Provence ,","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bertrand","family":"Scaar","sequence":"additional","affiliation":[{"name":"Ligue pour la protection des oiseaux d\u2019Alsace , Rosenwiller ,","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David","family":"Seve","sequence":"additional","affiliation":[{"name":"ATENA78 , Houdan ,","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3403-8272","authenticated-orcid":false,"given":"Josefa","family":"Bleu","sequence":"additional","affiliation":[{"name":"Universit\u00e9 de Strasbourg, CNRS, IPHC, UMR7178, F-67000 , Strasbourg ,","place":["France"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2026,10,5]]},"reference":[{"key":"2026102111473561000_bib1","volume-title":"Data for the article: \u201cSpatiotemporal variation of the chick mass-brood size trade-off in the little owl.\u201d","author":"Ambielle","year":"2026"},{"key":"2026102111473561000_bib2","doi-asserted-by":"publisher","first-page":"469","DOI":"10.1086\/650726","article-title":"Senescence of Maternal Effects: Aging Influences Egg Quality and Rearing Capacities of a Long-Lived Bird","volume":"175","author":"Beamonte-Barrientos","year":"2010","journal-title":"The American Naturalist"},{"key":"2026102111473561000_bib3","doi-asserted-by":"publisher","first-page":"46","DOI":"10.1890\/14-0774.1","article-title":"How do animals optimize the size\u2013number trade-off when aging? 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