Item talk:Q259559
From geokb
{
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"@type": "Article",
"additionalType": "Journal Article",
"name": "Breeding population size of the Pink-footed Shearwater Ardenna creatopus on Isla Mocha, Chile",
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"journal": {
"@type": "Periodical",
"name": "Marine Ornithology: Journal of Seabird Research and Conservation",
"volumeNumber": "52",
"issueNumber": null
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"inLanguage": "en",
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"name": "Marine Ornithology: Journal of Seabird Research and Conservation"
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"datePublished": "2024",
"dateModified": "2024-05-15",
"abstract": "Species population estimates are a fundamental component of conservation planning, but there are deficiencies in reliable data for many seabirds. The Pink-footed Shearwater\u00a0Ardenna creatopus\u00a0is a seabird that breeds on three islands worldwide, with the largest population on Isla Mocha, Chile. We aimed to update the breeding population estimate of Pink-footed Shearwaters on Isla Mocha, comparing results from design- and model-based estimation methods. We counted shearwater burrows in 220 randomly generated five-meter-radius plots across pre-defined strata on Isla Mocha. We estimated total number of burrows using area-based extrapolation (design-based method), and separately using a model predicting burrow density based on habitat (model-based method). We multiplied burrow abundance estimates by burrow occupancy for final population estimates. The stratum-area-weighted burrow density estimate for the 15.8 km2\u00a0study area was 0.0106 burrows\u00b7m-2\u00a0(standard error [SE] = 0.0030). The average island-wide proportion of occupied burrows was 0.758 (standard deviation [SD] = 0.121). The design-based method estimated 168\u00a0209 burrows (95% confidence interval [CI] = 74\u00a0715-261\u00a0704, coefficient of variation [CV] = 0.28), and 127\u00a0503 breeding pairs (95% CI = 87\u00a0610-167\u00a0395). The model-based method estimated 233\u00a0436 burrows (95% CI = 151\u00a0237-332\u00a0179, CV = 0.19) and 181\u00a0859 breeding pairs (95% CI = 95\u00a0773-267\u00a0945, CV = 0.24). These population estimates are greater than previous estimates for Isla Mocha, whose means ranged from 19\u00a0440-42\u00a0095 breeding pairs. Because our study design differed from those used to generate previous estimates, our estimate should be considered a stand-alone result rather than an increase in the breeding population. Because of the low fit of the model-based result, the design-based result may be a more reliable estimate to use for species management efforts. Based on our estimate, approximately 90% of the Pink-footed Shearwater world population breeds on Isla Mocha, and with its restriction to only three breeding localities world-wide, the species remains vulnerable. The full manuscript in Spanish can be found in Appendix 1, available on the website.",
"description": "12 p.",
"publisher": {
"@type": "Organization",
"name": "Maine Ornithology"
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"author": [
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"@type": "Person",
"name": "Carle, Ryan D.",
"givenName": "Ryan D.",
"familyName": "Carle",
"affiliation": [
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"name": "Oikonos Ecosystem Knowledge"
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"@type": "Person",
"name": "Varela, Tiare",
"givenName": "Tiare",
"familyName": "Varela",
"affiliation": [
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"@type": "Organization",
"name": "Oikonos Ecosystem Knowledge, Valparaiso, Chile"
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"name": "Colodro, Valentina",
"givenName": "Valentina",
"familyName": "Colodro",
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"value": "0000-0001-9285-3171",
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"name": "Clark-Wolf, T.J.",
"givenName": "T.J.",
"familyName": "Clark-Wolf",
"affiliation": [
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"@type": "Organization",
"name": "University of Washington"
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},
{
"@type": "Person",
"name": "Felis, Jonathan J. jfelis@usgs.gov",
"givenName": "Jonathan J.",
"familyName": "Felis",
"email": "jfelis@usgs.gov",
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"name": "Western Ecological Research Center",
"url": "https://www.usgs.gov/centers/werc"
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"@type": "Person",
"name": "Hodum, Peter",
"givenName": "Peter",
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"name": "Oikonos Ecosystem Knowledge"
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{
"@type": "Person",
"name": "Castillo, Francisco Javier Astete",
"givenName": "Francisco Javier Astete",
"familyName": "Castillo",
"affiliation": [
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"name": "Corporaci\u00f3n Nacional Forestal"
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{
"@type": "Person",
"name": "Lopez, Veronica",
"givenName": "Veronica",
"familyName": "Lopez",
"affiliation": [
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"name": "Oikonos-Ecosystem Knowledge"
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"funder": [
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"name": "Western Ecological Research Center",
"url": "https://www.usgs.gov/centers/werc"
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"url": "https://geonames.org/5336331"
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