Skip to main content

Free Content A Critique of the Visual Census Method for Assessing Coral Reef Fish Populations

Download Article:
 Download
(PDF 373.4677734375 kb)
 
Many investigators have noted that estimates of coral reef fish populations by visual census are biased but its precision has never been quantitatively determined. It is still used, however, because this technique is usually assumed to be the best non-destructive method of population assessment. This study compares the results of visual censuses conducted on an isolated 1,500 m2 patch reef to the collection of all fishes made subsequently with rotenone on that reef. The visual censuses missed the presence or underestimated abundance of cryptic fish species. Diurnally active species were reasonably well censused, but the most common were often underestimated. Thus comparisons between fish communities based on visual census data should be restricted to the diurnally exposed species.

11 References.

No Supplementary Data.
No Data/Media
No Metrics

Document Type: Research Article

Publication date: 1982-01-01

More about this publication?
  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more