{"datasetrec":{"DasID":3623,"Acronym":null,"StandardTitle":"Bottlenose dolphin abundance in coastal Moreton Bay 2000","OrigTitle":null,"OrigTitleLangID":null,"OrigTitleLangCode":null,"OrigTitleLang":null,"OrigTitleLangNL":null,"VersionName":"1","ContactEmail":null,"VersionDate":null,"VersionDay":28,"VersionMonth":11,"VersionYear":2012,"SizeReference":null,"EngAbstract":"We estimated abundances of bottlenose dolphins in central eastern Moreton Bay (350 km²) using two commonly used abundance estimation methods for cetaceans: photo-identification mark-recapture and line-transect surveys.","EngDescr":"Marine megafauna populations in coastal waters are increasingly threatened by anthropogenic impacts. Moreton Bay, a large embayment in south-east Queensland, lies adjacent to one of the fastest growing regions in Australia and has a resident population of bottlenose dolphins, <i>Tursiops aduncus</i>. Evaluation of the effectiveness of any proposed management strategy requires robust population abundance estimates.\r\n\r\nWe estimated abundances of bottlenose dolphins in central eastern Moreton Bay (350 km²) using two commonly used abundance estimation methods for cetaceans: photo-identification mark-recapture and line-transect surveys. \r\n\r\nMark-recapture data were analyzed in CAPTURE using a model that allowed capture probabilities to vary between sampling events and between individuals. Based on an estimated 76% of the population identifiable photographically, total abundance estimates were 673 ± 130 s.e. (1997) and 818 ± 152 s.e. (1998). Line-transect data, analyzed using DISTANCE, gave an abundance estimate of 407 ± 113.5 s.e. (2000). These abundance estimates are large compared with many other coastal bottlenose dolphin populations. The line-transect surveys comprised a pilot study, and the lower line-transect abundance estimate is probably best attributable to methodological issues. In particular, smaller mean group size was estimated for the line-transects surveys (2.85 ± 0.29 s.e.) than the mark-recapture surveys (4.87 ± 0.39 s.e., 1997; 5.78 ± 0.73 s.e., 1998), and line-transect group sizes were probably underestimated. In addition, the line-transect detection probability (g(o)) was assumed to be one but was almost certainly less than one. However, the possibility of an actual decline in population size cannot be ruled out. Coefficients of variation (CV) were lower for mark-recapture than for line-transect surveys, however, CVs of line-transect estimates could be lowered through improved survey design. We evaluated the power of these surveys to detect trends in potential population declines for bottlenose dolphins in Moreton Bay and make recommendations for ongoing monitoring strategies.\r\n\r\nEffort data do not include date/time.","OrigAbstract":null,"OrigDescr":null,"Comments":null,"ReleaseDate":null,"ReleaseDate0":null,"OrigDescrLang":null,"EmbargoDate":null,"OrigDescrLangNL":null,"OrigLangCode":null,"OrigLangCodeExtended":null,"OrigLangID":null,"DescrCompFlag":0,"DescrTransFlag":0,"Citation":"Lukoschek, V. and B.L. Chilvers. 2008. A robust baseline for bottlenose dolphin abundance in coastal Moreton Bay: A large carnivore living in a region of escalating anthropogenic impacts. Wildlife Research. 35(7):593-605","AccessConstraints":null,"UDate":"2012-11-28","CDate":"2012-11-28","CurrencyDate":null,"RevisionDate":null,"DateLastModified":{"date":"2026-05-14 01:44:00.153333","timezone_type":1,"timezone":"+02:00"},"CheckedFlag":0,"PublicFlag":1,"VlizCoreFlag":1,"MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"StatusID":1,"DasType":"Data","DasTypeID":1,"DasOrigin":"Research","Progress":"Completed","AccessConstraint":"Attribution-NonCommercial (CC BY-NC)","AccConstrEN":"Attribution-NonCommercial (CC BY-NC)","AccConstrDisplay":"<a rel=\"license\" href=\"https://creativecommons.org/licenses/by-nc/4.0/\" target=\"_blank\"><img alt=\"Creative Commons License\" style=\"border:0px;height:15px;width:80px;vertical-align:middle;\" src=\"https://www.marinespecies.org/aphia/images/cc/by-nc.png\" /></a> This dataset is licensed under a <a rel=\"license\" href=\"https://creativecommons.org/licenses/by-nc/4.0/\" target=\"_blank\">Creative Commons Attribution-NonCommercial 4.0 International License</a>.","License":"https://creativecommons.org/licenses/by-nc/4.0","AccConstrDescription":"This license lets others remix, tweak, and build upon your work non-commercially, and although their new works must also acknowledge you and be non-commercial, they don’t have to license their derivative works on the same terms","Lineage":null,"AccConID":24},"dois":null,"spcols":null,"keywords":[{"ThesaurusTerm":"I, Pacific","ThesTypID":34,"ThesType":"ASFA Geoterms","Code":null,"Description":null,"OrigThesTerm":"I, Pacific","DutchTerm":null,"URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"ISEW, Australia, Queensland, Moreton Bay","ThesTypID":34,"ThesType":"ASFA Geoterms","Code":null,"Description":null,"OrigThesTerm":"ISEW, Australia, Queensland, Moreton Bay","DutchTerm":null,"URI":null,"DasKeywordDescr":null}],"parents":null,"children":null,"othrel":null,"othrelrev":[{"DasID":1865,"Acronym":"OBIS-SEAMAP","StandardTitle":"Spatial Ecological Analysis of Megavertebrate Populations","Relation":"Published dataset","RelationY":"Published in","RelID":13,"doi":null,"vlizDoi":null}],"ownerships":[{"OrderNr":1,"Surname":null,"Firstname":null,"Initials":null,"PerPublicFlag":null,"AdrID":null,"Email":null,"InsPublicFlag":1,"Acronym":null,"OrigNameLangCode":null,"OrigNameLangID":null,"FullOrigName":null,"InsOwnerCNT":2,"PersID":null,"InsID":12396,"FullInstitute":"University of California, Irvine","RoleID":20,"Role":"Data owner","OrigName":null,"StandardName":"University of California, Irvine","FullAcronym":null,"ORC":null,"ROR":null},{"OrderNr":2,"Surname":"Lukoschek","Firstname":"Vimoksalehi","Initials":"V.","PerPublicFlag":1,"AdrID":null,"Email":null,"InsPublicFlag":1,"Acronym":null,"OrigNameLangCode":null,"OrigNameLangID":null,"FullOrigName":null,"InsOwnerCNT":2,"PersID":26831,"InsID":12396,"FullInstitute":"University of California, Irvine","RoleID":24,"Role":"Contact","OrigName":null,"StandardName":"University of California, Irvine","FullAcronym":null,"ORC":null,"ROR":null}],"taxterms":[{"DasTaxtTypID":1,"DasTaxtType":"Taxonomic coverage","TaxtID":26535,"TaxTerm":"Tursiops Gervais, 1855","AphiaID":137026,"DutchTerm":null}],"frameworks":null,"otherterms":null,"temporal":[{"DasDateID":3043,"StartYear":2000,"EndYear":2000,"StartDay":8,"EndDay":8,"StartDate":"2000-01-08","EndDate":"2000-11-08","DasDate":null,"Resolution":null,"ResolutionNL":null,"Notes":null,"StartMonth0":1,"StartMonth":"January","StartMonthNL":"Januari","EndMonth0":11,"EndMonth":"November","EndMonthNL":"November","Progress":"Completed","ProgressNL":"Afgelopen"}],"geographical":[{"GeoTerm":"Moreton Bay","DasGeoID":6348,"DasGeoTerm":null,"DasID":3623,"GeotID":3162,"X":null,"Y":null,"MaxX":null,"MaxY":null,"StationName":null,"Precision":null,"CoordSystID":null,"GeoDatumID":null,"OrigCoordMinX":null,"OrigCoordMinY":null,"OrigCoordMaxX":null,"OrigCoordMaxY":null,"OrderNr":null,"Projection":null,"GeoDatum":null,"GeoObjectID":14655,"OrigGeoTerm":"Moreton Bay","DutchTerm":null},{"GeoTerm":"Pacific Ocean","DasGeoID":6349,"DasGeoTerm":null,"DasID":3623,"GeotID":2251,"X":null,"Y":null,"MaxX":null,"MaxY":null,"StationName":null,"Precision":null,"CoordSystID":null,"GeoDatumID":null,"OrigCoordMinX":null,"OrigCoordMinY":null,"OrigCoordMaxX":null,"OrigCoordMaxY":null,"OrderNr":null,"Projection":null,"GeoDatum":null,"GeoObjectID":1903,"OrigGeoTerm":"Pacific Ocean","DutchTerm":null}],"meastypes":null,"dasthemes":[{"DasThemeID":70,"DasTheme":"Biology > Mammals","DasTheme0":"Mammals","DutchTerm":"Zoogdieren"}],"projects":null,"refs":[{"0":248444,"BRefID":248444,"1":"Based on this dataset","Relation":"Based on this dataset","2":2,"RelationID":2,"3":"<b>Lukoschek, V.; Chilvers, L.</b> (2008). A robust baseline for bottlenose dolphin abundance in coastal Moreton Bay: a large carnivore living in a region of escalating anthropogenic impacts. <i>Wildl. Res. 35(7)</i>: 593-605. <a href=\"http://dx.doi.org/10.1071/WR07021\" target=\"_blank\">http://dx.doi.org/10.1071/WR07021</a>","RR":"<b>Lukoschek, V.; Chilvers, L.</b> (2008). A robust baseline for bottlenose dolphin abundance in coastal Moreton Bay: a large carnivore living in a region of escalating anthropogenic impacts. <i>Wildl. Res. 35(7)</i>: 593-605. <a href=\"http://dx.doi.org/10.1071/WR07021\" target=\"_blank\">http://dx.doi.org/10.1071/WR07021</a>","4":"A robust baseline for bottlenose dolphin abundance in coastal Moreton Bay: a large carnivore living in a region of escalating anthropogenic impacts","StT":"A robust baseline for bottlenose dolphin abundance in coastal Moreton Bay: a large carnivore living in a region of escalating anthropogenic impacts","5":"Lukoschek, V.; Chilvers, L.","RSA":"Lukoschek, V.; Chilvers, L.","6":"Gebaseerd op deze dataset","DutchTerm":"Gebaseerd op deze dataset","7":2008,"AnaDate":2008,"8":null,"MonDate":null,"9":". <i>Wildl. Res. 35(7)</i>: 593-605. <a href=\"http://dx.doi.org/10.1071/WR07021\" target=\"_blank\">http://dx.doi.org/10.1071/WR07021</a>","":". <i>Wildl. Res. 35(7)</i>: 593-605. <a href=\"http://dx.doi.org/10.1071/WR07021\" target=\"_blank\">http://dx.doi.org/10.1071/WR07021</a>","10":"http://dx.doi.org/10.1071/WR07021","doi":"http://dx.doi.org/10.1071/WR07021"}],"urls":[{"URL":"https://obis.org/dataset/fd48e0a8-dd48-4ff7-b2a8-770b138b4806","externalID":"fd48e0a8-dd48-4ff7-b2a8-770b138b4806","URLTypeCode":null,"URLType":"Online dataset","URLTypID":19,"downloadURL":null,"FileName":null},{"URL":"seamap.env.duke.edu/dataset/494","externalID":"494","URLTypeCode":null,"URLType":"Dataset information","URLTypID":17,"downloadURL":null,"FileName":null}],"pictures":null,"urlmaps":null,"spatreps":null,"fileformats":null,"resmessage":"","complete":1}