Estimating Site Occupancy Rates When Detection Probabilities Are Less Than One
Nondetection of a species at a site does not imply that the species is absent unless the probability of detection is 1. We propose a model and likelihood-based method for estimating site occupancy rates when detection probabilities are < 1. The model provides a flexible framework enabling covaria...
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| Veröffentlicht in: | Ecology (Durham) 2002-08, Vol.83 (8), p.2248-2255 |
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| container_title | Ecology (Durham) |
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| creator | MacKenzie, Darryl I. Nichols, James D. Lachman, Gideon B. Droege, Sam Royle, J. Andrew Langtimm, Catherine A. |
| description | Nondetection of a species at a site does not imply that the species is absent unless the probability of detection is 1. We propose a model and likelihood-based method for estimating site occupancy rates when detection probabilities are < 1. The model provides a flexible framework enabling covariate information to be included and allowing for missing observations. Via computer simulation, we found that the model provides good estimates of the occupancy rates, generally unbiased for moderate detection probabilities (>0.3). We estimated site occupancy rates for two anuran species at 32 wetland sites in Maryland, USA, from data collected during 2000 as part of an amphibian monitoring program, Frog-watch USA. Site occupancy rates were estimated as 0.49 for American toads (Bufo americanus), a 44% increase over the proportion of sites at which they were actually observed, and as 0.85 for spring peepers (Pseudacris crucifer), slightly above the observed proportion of 0.83. |
| doi_str_mv | 10.1890/0012-9658(2002)083[2248:ESORWD]2.0.CO;2 |
| format | Article |
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Site occupancy rates were estimated as 0.49 for American toads (Bufo americanus), a 44% increase over the proportion of sites at which they were actually observed, and as 0.85 for spring peepers (Pseudacris crucifer), slightly above the observed proportion of 0.83.</description><identifier>ISSN: 0012-9658</identifier><identifier>EISSN: 1939-9170</identifier><identifier>DOI: 10.1890/0012-9658(2002)083[2248:ESORWD]2.0.CO;2</identifier><identifier>CODEN: ECGYAQ</identifier><language>eng</language><publisher>Washington, DC: Ecological Society of America</publisher><subject>Amphibians ; Animal and plant ecology ; Animal populations ; Animal, plant and microbial ecology ; Animals ; anurans ; Autoecology ; Biological and medical sciences ; bootstrap ; Bufo americanus ; detection probability ; Ecological modeling ; Estimation methods ; Freshwater ; Fundamental and applied biological sciences. Psychology ; General aspects. Techniques ; Herpetology ; Mark release recapture ; maximum likelihood ; metapopulation ; Metapopulation ecology ; Methods and techniques (sampling, tagging, trapping, modelling...) ; monitoring ; Parametric models ; patch occupancy ; Predictions ; Probabilities ; Pseudacris crucifer ; Reptilia. Amphibia ; site occupancy ; Species ; Standard error ; Vertebrata ; Wildlife ecology</subject><ispartof>Ecology (Durham), 2002-08, Vol.83 (8), p.2248-2255</ispartof><rights>Copyright 2002 Ecological Society of America</rights><rights>2002 by the Ecological Society of America</rights><rights>2002 INIST-CNRS</rights><rights>Copyright Ecological Society of America Aug 2002</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4808-d3132aa57279023682079ee0885bd101cbc04633c27b7ee3b06f1ee9096971343</citedby><cites>FETCH-LOGICAL-c4808-d3132aa57279023682079ee0885bd101cbc04633c27b7ee3b06f1ee9096971343</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/3072056$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/3072056$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,780,784,803,1417,27924,27925,45574,45575,58017,58250</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=13848678$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>MacKenzie, Darryl I.</creatorcontrib><creatorcontrib>Nichols, James D.</creatorcontrib><creatorcontrib>Lachman, Gideon B.</creatorcontrib><creatorcontrib>Droege, Sam</creatorcontrib><creatorcontrib>Royle, J. Andrew</creatorcontrib><creatorcontrib>Langtimm, Catherine A.</creatorcontrib><title>Estimating Site Occupancy Rates When Detection Probabilities Are Less Than One</title><title>Ecology (Durham)</title><description>Nondetection of a species at a site does not imply that the species is absent unless the probability of detection is 1. We propose a model and likelihood-based method for estimating site occupancy rates when detection probabilities are < 1. The model provides a flexible framework enabling covariate information to be included and allowing for missing observations. Via computer simulation, we found that the model provides good estimates of the occupancy rates, generally unbiased for moderate detection probabilities (>0.3). We estimated site occupancy rates for two anuran species at 32 wetland sites in Maryland, USA, from data collected during 2000 as part of an amphibian monitoring program, Frog-watch USA. Site occupancy rates were estimated as 0.49 for American toads (Bufo americanus), a 44% increase over the proportion of sites at which they were actually observed, and as 0.85 for spring peepers (Pseudacris crucifer), slightly above the observed proportion of 0.83.</description><subject>Amphibians</subject><subject>Animal and plant ecology</subject><subject>Animal populations</subject><subject>Animal, plant and microbial ecology</subject><subject>Animals</subject><subject>anurans</subject><subject>Autoecology</subject><subject>Biological and medical sciences</subject><subject>bootstrap</subject><subject>Bufo americanus</subject><subject>detection probability</subject><subject>Ecological modeling</subject><subject>Estimation methods</subject><subject>Freshwater</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>General aspects. Techniques</subject><subject>Herpetology</subject><subject>Mark release recapture</subject><subject>maximum likelihood</subject><subject>metapopulation</subject><subject>Metapopulation ecology</subject><subject>Methods and techniques (sampling, tagging, trapping, modelling...)</subject><subject>monitoring</subject><subject>Parametric models</subject><subject>patch occupancy</subject><subject>Predictions</subject><subject>Probabilities</subject><subject>Pseudacris crucifer</subject><subject>Reptilia. Amphibia</subject><subject>site occupancy</subject><subject>Species</subject><subject>Standard error</subject><subject>Vertebrata</subject><subject>Wildlife ecology</subject><issn>0012-9658</issn><issn>1939-9170</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><recordid>eNqdkF1rFDEUhoMouLb-h0FU9GK2J8lMPuxVmW5bYXGkWykiEjLpWZtlOrMms8j--2aYYouXBkIg58n7hoeQIwpzqjQcAVCWa1GqDwyAfQTFfzBWqE-LVX15ffqTzWFe1cfsGZlRzXWuqYTnZPb31UvyKsYNpEULNSNfFnHwd3bw3a9s5QfMaud2W9u5fXZpB4zZ9S122SkO6Abfd9nX0De28a0ffBqeBMyWGGN2dWu7rO7wkLxY2zbi64fzgHw7W1xVF_myPv9cnSxzVyhQ-Q2nnFlbSiY1MC4UA6kRQamyuaFAXeOgEJw7JhuJyBsQa4qoQQstKS_4AXk_5W5D_3uHcTB3PjpsW9thv4uGqlJzqlkC3_wDbvpd6NLfDEs6hSiYTtD5BLnQxxhwbbYhSQl7Q8GM0s2oz4z6zCjdJOlmlG4m6SbdmKo2Y927hzobnW3XIZn08TGOq0IJqRK3mrg_vsX9_9aZRfV9BBRX4zilvp1SN3How9NUxkGatBmUgt8DBVul2Q</recordid><startdate>200208</startdate><enddate>200208</enddate><creator>MacKenzie, Darryl I.</creator><creator>Nichols, James D.</creator><creator>Lachman, Gideon B.</creator><creator>Droege, Sam</creator><creator>Royle, J. Andrew</creator><creator>Langtimm, Catherine A.</creator><general>Ecological Society of America</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QG</scope><scope>7SN</scope><scope>7SS</scope><scope>7ST</scope><scope>7T7</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>K9.</scope><scope>P64</scope><scope>RC3</scope><scope>SOI</scope><scope>F1W</scope><scope>H95</scope><scope>L.G</scope></search><sort><creationdate>200208</creationdate><title>Estimating Site Occupancy Rates When Detection Probabilities Are Less Than One</title><author>MacKenzie, Darryl I. ; Nichols, James D. ; Lachman, Gideon B. ; Droege, Sam ; Royle, J. Andrew ; Langtimm, Catherine A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4808-d3132aa57279023682079ee0885bd101cbc04633c27b7ee3b06f1ee9096971343</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2002</creationdate><topic>Amphibians</topic><topic>Animal and plant ecology</topic><topic>Animal populations</topic><topic>Animal, plant and microbial ecology</topic><topic>Animals</topic><topic>anurans</topic><topic>Autoecology</topic><topic>Biological and medical sciences</topic><topic>bootstrap</topic><topic>Bufo americanus</topic><topic>detection probability</topic><topic>Ecological modeling</topic><topic>Estimation methods</topic><topic>Freshwater</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>General aspects. Techniques</topic><topic>Herpetology</topic><topic>Mark release recapture</topic><topic>maximum likelihood</topic><topic>metapopulation</topic><topic>Metapopulation ecology</topic><topic>Methods and techniques (sampling, tagging, trapping, modelling...)</topic><topic>monitoring</topic><topic>Parametric models</topic><topic>patch occupancy</topic><topic>Predictions</topic><topic>Probabilities</topic><topic>Pseudacris crucifer</topic><topic>Reptilia. Amphibia</topic><topic>site occupancy</topic><topic>Species</topic><topic>Standard error</topic><topic>Vertebrata</topic><topic>Wildlife ecology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>MacKenzie, Darryl I.</creatorcontrib><creatorcontrib>Nichols, James D.</creatorcontrib><creatorcontrib>Lachman, Gideon B.</creatorcontrib><creatorcontrib>Droege, Sam</creatorcontrib><creatorcontrib>Royle, J. 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Andrew</au><au>Langtimm, Catherine A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Estimating Site Occupancy Rates When Detection Probabilities Are Less Than One</atitle><jtitle>Ecology (Durham)</jtitle><date>2002-08</date><risdate>2002</risdate><volume>83</volume><issue>8</issue><spage>2248</spage><epage>2255</epage><pages>2248-2255</pages><issn>0012-9658</issn><eissn>1939-9170</eissn><coden>ECGYAQ</coden><abstract>Nondetection of a species at a site does not imply that the species is absent unless the probability of detection is 1. We propose a model and likelihood-based method for estimating site occupancy rates when detection probabilities are < 1. The model provides a flexible framework enabling covariate information to be included and allowing for missing observations. Via computer simulation, we found that the model provides good estimates of the occupancy rates, generally unbiased for moderate detection probabilities (>0.3). We estimated site occupancy rates for two anuran species at 32 wetland sites in Maryland, USA, from data collected during 2000 as part of an amphibian monitoring program, Frog-watch USA. Site occupancy rates were estimated as 0.49 for American toads (Bufo americanus), a 44% increase over the proportion of sites at which they were actually observed, and as 0.85 for spring peepers (Pseudacris crucifer), slightly above the observed proportion of 0.83.</abstract><cop>Washington, DC</cop><pub>Ecological Society of America</pub><doi>10.1890/0012-9658(2002)083[2248:ESORWD]2.0.CO;2</doi><tpages>8</tpages></addata></record> |
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| ispartof | Ecology (Durham), 2002-08, Vol.83 (8), p.2248-2255 |
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| subjects | Amphibians Animal and plant ecology Animal populations Animal, plant and microbial ecology Animals anurans Autoecology Biological and medical sciences bootstrap Bufo americanus detection probability Ecological modeling Estimation methods Freshwater Fundamental and applied biological sciences. Psychology General aspects. Techniques Herpetology Mark release recapture maximum likelihood metapopulation Metapopulation ecology Methods and techniques (sampling, tagging, trapping, modelling...) monitoring Parametric models patch occupancy Predictions Probabilities Pseudacris crucifer Reptilia. Amphibia site occupancy Species Standard error Vertebrata Wildlife ecology |
| title | Estimating Site Occupancy Rates When Detection Probabilities Are Less Than One |
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