{"refrec":{"BRefID":7331,"RR":"<b>Harvey, E.; Fletcher, D.; Shortis, M.</b> (2001). Improving the statistical power of length estimates of reef fish: a comparison of estimates determined visually by divers with estimates produced by a stereo-video system. <i>Fish. Bull. 99(1)</i>: 72-80","BEntID":7331,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Fish. Bull. 99(1)</i>: 72-80","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Harvey, E.; Fletcher, D.; Shortis, M.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Harvey, E.; Fletcher, D.; Shortis, M.","Englishabstract":"We calculated the power of visual length estimates by novice and experienced scientific SCUBA divers and estimates generated by a stereo-video system to detect changes in the mean length of three common species of reef fish from New Zealand. Length estimates from a stereo-video system had much greater power for blue cod (mean length=33.1 cm., range 19.5-50.1 cm.) and snapper (mean length=31.7 cm., range 23-71 cm.). For a third species, red cod (mean length=42.5 cm., range 13-74 cm.), the statistical power of diver and stereo-video estimates was much less for an equivalent number of samples owing to the greater variation in the true mean length of red cod recorded at different sites. At 90% power, a stereo-video system detected a 15% (~5-cm) change in the mean length of blue cod with 63% less samples (10) than those required by the experienced scientific divers (27). Novice scientific divers required 28 samples.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Improving the statistical power of length estimates of reef fish: a comparison of estimates determined visually by divers with estimates produced by a stereo-video system","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2001,"MonPub":null,"DateUpdate":"2001-04-03","DateCreate":"2001-04-03","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000167063300007","VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":7331,"PubliDate":2001,"Pagination":"72-80","XtraPublOfAnaID":null,"ISBN":null,"Volume":"99","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":44319,"SerRR":"Fishery Bulletin. US Government Printing Office: Washington, D.C..  ISSN 0090-0656; e-ISSN 1937-4518","StandardTitleSer":"Fishery Bulletin","ISSN":"0090-0656","AbbrevSer":"Fish. Bull.","StandardTitleMon":null,"StartPage":72,"Pages":9,"ToPubliDate":null,"BRefBibLvlCode":"S","SerNotes":"Nummering verandert vanaf 1963, issuenummer wordt aangepast en men gaat over na vier nummers per jaar. Volumenummer wordt aangepast. In het begin bestond het nr. van het Bulletin uit een extract van het bulletin van het US Bureau of fisheries."},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":null,"othpubs":null,"ownerships":null,"authors":[{"AutName":"Harvey","Firstname":"Euan","Initials":"E.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":7331,"AutID":11489,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Fletcher","Firstname":"David","Initials":"D.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":7331,"AutID":11490,"OrderNr":2,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null},{"AutName":"Shortis","Firstname":"Mark","Initials":"M.","Affiliation":null,"Discriminator":null,"CorporateFlag":0,"BEntID":7331,"AutID":11491,"OrderNr":3,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":null,"InsFSN":null,"ORCID":null,"PersID":null,"InsID":null}],"mapdetails":null,"datasets":null,"monographs":null,"monparts":null,"serparts":null,"BEntOpen":null,"BEntPrivate":null,"availability":null,"litstyles":null,"thespers":null,"arch2discl":null,"SERpubls":[{"PublName":"US Government Printing Office","City":"Washington, D.C."}],"MONpubls":null,"pictures":[],"thestermsPath":null,"thestermsASFA":null,"taxtermsASFA":null,"geotermsASFA":null,"collections":null,"conf":null,"proj":null,"Physdatasets":null,"spcols":null,"doi":null,"publs":null,"serparttypes":null,"monauthors":null,"MParts":null,"SParts":null,"hLibs":null,"langs":[{"BEntID":7331,"AbstractFlag":0,"LangID":15,"LangCode":"en","Lang":"English","DutchTerm":"Engels","LangCodeExtended":"eng"}],"urls":null,"thesterms":null,"taxterms":null,"geoterms":null,"othterms":null,"asfacodes":null,"asfa2codes":null,"thestermsFRIS":null,"taxtermsFRIS":null,"geotermsFRIS":null,"othtermsFRIS":null,"resmessage":"","complete":1,"sessions":{"newSesName":"Chisala, Chilekwa, C.","newSesDate":{"date":"2001-04-03 10:11:40.337000","timezone_type":3,"timezone":"Europe/Brussels"},"updSesName":"Chisala, Chilekwa, C.","updSesDate":{"date":"2001-04-03 10:11:40.337000","timezone_type":3,"timezone":"Europe/Brussels"}}}