Correction for bias in visual transect censuses of coral reef fishes View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1983-08

AUTHORS

P. F. Sale, B. J. Sharp

ABSTRACT

Transect techniques for censusing reef fishes, and the sources of bias inherent in them are considered. A technique, derived from aeraly survey methods, is demonstrated to correct a bias in density estimates due to the width of the transect being censused. This bias is sufficient on a transect 1 m wide to underestimate density by 11.1–26.7% for five species or species groups examined. The bias is still greater on wider transects. Because this bias varies in degree among species, comparisons among species should not be made using uncorrected transect data. Comments are made on other probable sources of bias in transect data, and on ways of minimising bias when making visual transect censuses. More... »

PAGES

37-42

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf00304730

DOI

http://dx.doi.org/10.1007/bf00304730

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1002470100


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