{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,1,21]],"date-time":"2025-01-21T05:07:19Z","timestamp":1737436039373,"version":"3.33.0"},"reference-count":34,"publisher":"Cambridge University Press (CUP)","license":[{"start":{"date-parts":[[2025,1,20]],"date-time":"2025-01-20T00:00:00Z","timestamp":1737331200000},"content-version":"unspecified","delay-in-days":19,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Bird Conservation International"],"published-print":{"date-parts":[[2025]]},"abstract":"<jats:title>Summary<\/jats:title>\n\t  <jats:p>Medium to small petrels that mostly nest in burrows or crevices represent a large fraction of the world\u2019s seabirds, yet their population trends are largely unknown. This lack of knowledge, which has implications for conservation planning, results mostly from methodological difficulties and from the approaches that have been used for their monitoring. Here, we present the surveying scheme created to monitor Cory\u2019s Shearwater <jats:italic>Calonectris borealis<\/jats:italic> breeding numbers at their largest known colony, Selvagem Grande (Portugal). We defined 60 circular plots at fixed locations on this 2.45 km<jats:sup>2<\/jats:sup> island and counted nests with eggs annually at the end of laying. Results show that the population increased at 1.45% (95% confidence interval [CI]: 0.72\u20132.01%) per year between 2009 and 2023. We estimate that the current population size is 38,830 pairs (95% quantile CIs = 34,373\u201343,713). To the best of our knowledge, this study provides the first systematic information (using fully repeatable methods and providing CIs for the estimates) on population trends of Cory\u2019s Shearwaters, one of the most abundant seabirds in the warm temperate and subtropical North Atlantic and one of the most studied petrels globally. Monitoring using the approach detailed here requires two days of work (by 2\u20133 persons) per year. Our results and simulations indicate that this is a powerful methodology, with narrow confidence limits for estimated trends and an ability to detect small population changes over short time spans. We suggest that more monitoring protocols similar to this one (with necessary site-specific adaptations, particularly for potential colony expansion where suitable habitat exists) should be developed and implemented in a range of colonies with crevice and burrowing nesting petrels to improve our knowledge on the population status of a broad fraction of the world\u2019s seabirds.<\/jats:p>","DOI":"10.1017\/s095927092400039x","type":"journal-article","created":{"date-parts":[[2025,1,20]],"date-time":"2025-01-20T09:56:12Z","timestamp":1737366972000},"source":"Crossref","is-referenced-by-count":0,"title":["Fixed-plot monitoring as a tool to assess population trends of underground nesting seabirds: an example with Cory\u2019s Shearwater at its world\u2019s largest colony"],"prefix":"10.1017","volume":"35","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3000-0522","authenticated-orcid":false,"given":"Paulo","family":"Catry","sequence":"first","affiliation":[]},{"given":"Maria","family":"Dias","sequence":"additional","affiliation":[]},{"given":"D\u00edlia","family":"Menezes","sequence":"additional","affiliation":[]},{"given":"Paulo","family":"Oliveira","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7005-4862","authenticated-orcid":false,"given":"Daniel","family":"Lopes","sequence":"additional","affiliation":[]},{"given":"Maria","family":"Alho","sequence":"additional","affiliation":[]},{"given":"Letizia","family":"Campioni","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4047-9995","authenticated-orcid":false,"given":"Teresa","family":"Catry","sequence":"additional","affiliation":[]},{"given":"Marie Claire","family":"Gatt","sequence":"additional","affiliation":[]},{"given":"Francesco","family":"Ventura","sequence":"additional","affiliation":[]},{"given":"Joana","family":"Romero","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7207-3474","authenticated-orcid":false,"given":"Jos\u00e9 Pedro","family":"Granadeiro","sequence":"additional","affiliation":[]}],"member":"56","published-online":{"date-parts":[[2025,1,20]]},"reference":[{"key":"S095927092400039X_r24","volume-title":"Expedi\u00e7\u00e3o Selvagens 50: Relat\u00f3rio e Programa de Monitoriza\u00e7\u00e3o a Longo Prazo","author":"Oliveira","year":"2023"},{"key":"S095927092400039X_r15","doi-asserted-by":"publisher","DOI":"10.1016\/j.biocon.2020.108817"},{"key":"S095927092400039X_r26","doi-asserted-by":"publisher","DOI":"10.7717\/peerj.6721"},{"key":"S095927092400039X_r19","doi-asserted-by":"publisher","DOI":"10.18637\/jss.v082.i13"},{"key":"S095927092400039X_r1","unstructured":"Arel-Bundock, V. (2023). marginaleffects: Predictions, Comparisons, Slopes, Marginal Means, and Hypothesis Tests. R package version 0.13. Available at https:\/\/CRAN.R-project.org\/package=marginaleffects."},{"key":"S095927092400039X_r30","doi-asserted-by":"publisher","DOI":"10.1111\/cobi.12900"},{"key":"S095927092400039X_r10","first-page":"29","article-title":"Aves marinhas da Selvagem Pequena e do Ilh\u00e9u de Fora: censos e notas, com destaque para a dieta da gaivota-de-patas-amarelas","volume":"20","author":"Catry","year":"2010","journal-title":"Airo"},{"key":"S095927092400039X_r29","doi-asserted-by":"publisher","DOI":"10.3389\/fmars.2019.00094"},{"key":"S095927092400039X_r21","doi-asserted-by":"publisher","DOI":"10.1017\/S0959270910000559"},{"key":"S095927092400039X_r8","volume-title":"Albatrosses and Petrels Across the World","author":"Brooke","year":"2004"},{"key":"S095927092400039X_r32","first-page":"257","article-title":"Population trends of spectacled petrels Procellaria conspicillata and other seabirds at Inaccessible Island","volume":"47","author":"Ryan","year":"2019","journal-title":"Marine Ornithology"},{"key":"S095927092400039X_r22","volume-title":"Atlas das Aves Marinhas de Portugal","author":"Meirinho","year":"2014"},{"key":"S095927092400039X_r27","volume-title":"R: A Language and Environment for Statistical Computing","year":"2021"},{"key":"S095927092400039X_r17","doi-asserted-by":"publisher","DOI":"10.1111\/2041-210X.12504"},{"key":"S095927092400039X_r13","doi-asserted-by":"crossref","first-page":"525","DOI":"10.1016\/j.biocon.2019.06.033","article-title":"Threats to seabirds: A global assessment","volume":"237","author":"Dias","year":"2019","journal-title":"Biological Conservation"},{"key":"S095927092400039X_r7","doi-asserted-by":"publisher","DOI":"10.1590\/1519-6984.13612"},{"key":"S095927092400039X_r34","unstructured":"Zhang, D. (2023). rsq: R-Squared and Related Measures. R package version 2.6. Available at https:\/\/CRAN.R-project.org\/package=rsq."},{"key":"S095927092400039X_r3","doi-asserted-by":"publisher","DOI":"10.18637\/jss.v067.i01"},{"key":"S095927092400039X_r31","doi-asserted-by":"publisher","DOI":"10.1111\/acv.12849"},{"key":"S095927092400039X_r14","doi-asserted-by":"publisher","DOI":"10.1016\/j.biocon.2011.04.022"},{"key":"S095927092400039X_r20","first-page":"36","article-title":"Population trends of Cory\u2019s Shearwaters Calonectris diomedea borealis breeding at Berlengas Islands","volume":"20","author":"Lecoq","year":"2010","journal-title":"Portugal. 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Available at https:\/\/datazone.birdlife.org\/species\/taxonomy (accessed 15 September 2024)."},{"key":"S095927092400039X_r16","doi-asserted-by":"publisher","DOI":"10.1675\/1524-4695(2006)29[56:NAPTOC]2.0.CO;2"},{"key":"S095927092400039X_r12","doi-asserted-by":"publisher","DOI":"10.3989\/scimar.2003.67s257"},{"key":"S095927092400039X_r25","doi-asserted-by":"publisher","DOI":"10.3897\/natureconservation.7.6890"}],"container-title":["Bird Conservation International"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S095927092400039X","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,1,20]],"date-time":"2025-01-20T09:56:18Z","timestamp":1737366978000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S095927092400039X\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025]]},"references-count":34,"alternative-id":["S095927092400039X"],"URL":"https:\/\/doi.org\/10.1017\/s095927092400039x","relation":{},"ISSN":["0959-2709","1474-0001"],"issn-type":[{"value":"0959-2709","type":"print"},{"value":"1474-0001","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025]]},"article-number":"e3"}}