TY - JOUR
T1 - Accounting for detectability in reef-fish biodiversity estimates
AU - MacNeil, M. Aaron
AU - Tyler, Elizabeth H.M.
AU - Fonnesbeck, Chris J.
AU - Rushton, Steven P.
AU - Polunin, Nicholas V.C.
AU - Conroy, Michael J.
PY - 2008/9/11
Y1 - 2008/9/11
N2 - Assessments of the biodiversity and structure of coral reef fish communities are often plagued by inadequate sampling and biases inherent in commonly used Underwater Visual Census (UVC) methods. Of these biases, heterogeneity in the detectability of reef-fish species is often ignored, even though it may have substantial effects on biodiversity estimates. Using highly replicated UVC sampling of all fish species at 4 sites in Tanzania, East Africa, we show that detectability varies greatly across species and is affected by traits such as body size and schooling behaviour, and that detectability of reef fishes can be readily accounted for by the application of Capture-Mark- Recapture (CMR) models. Based on our results, we recommend that approximately 24 point counts are necessary to assess full reef-fish species richness at sites in the Western Indian Ocean.
AB - Assessments of the biodiversity and structure of coral reef fish communities are often plagued by inadequate sampling and biases inherent in commonly used Underwater Visual Census (UVC) methods. Of these biases, heterogeneity in the detectability of reef-fish species is often ignored, even though it may have substantial effects on biodiversity estimates. Using highly replicated UVC sampling of all fish species at 4 sites in Tanzania, East Africa, we show that detectability varies greatly across species and is affected by traits such as body size and schooling behaviour, and that detectability of reef fishes can be readily accounted for by the application of Capture-Mark- Recapture (CMR) models. Based on our results, we recommend that approximately 24 point counts are necessary to assess full reef-fish species richness at sites in the Western Indian Ocean.
UR - http://www.scopus.com/inward/record.url?scp=53949096112&partnerID=8YFLogxK
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U2 - 10.3354/meps07580
DO - 10.3354/meps07580
M3 - Article
AN - SCOPUS:53949096112
SN - 0171-8630
VL - 367
SP - 249
EP - 260
JO - Marine Ecology - Progress Series
JF - Marine Ecology - Progress Series
ER -