Nom du corpus

Corpus Systématique Animale

Titre du document

A new species-time method for visual assessment of fishes and its comparison with established methods

Lien vers le document
Springer (journals)
Langue(s) du document
Type de document
Mots-clés d'auteur
  • Fish assemblages
  • Census techniques
  • Relative abundance
  • Visual Fast Count
  • Base-line data
  • Coral reef
Nom du fichier dans la ressource
  • Joseph J. Kimmel
  • Department of Marine Sciences, University of Puerto Rico, 00708, Mayaguez, PR, U.S.A.

Synopsis: Relative abundances for 80 species in a fish assemblage were estimated using three visual assessment methods. Results of two species-time methods, the Rapid Visual Census (RVC) of Jones & Thompson (1978) and a new method, the Visual Fast Count (VFC), are compared to the traditional transect method. The VFC is similar to the RVC but it is an attempt to improve: on the quantitative nature of the results. Results from each method were significantly correlated, but important differences between methods were found. With an equal number of replicates both RVC and VFC methods yielded significantly more species than the transect method. Relative abundances estimated by the RVC were significantly different from those determined by either VFC or transect methods, but VFC and transect results were not different. A qualitative similarity index using presence-absence data was calculated and compared among methods. Values ranged from 84.3 to 85.9%, illustrating a consistent level of similarity for the faunas censused regardless of census method. Quantitative similarities (percent similarity), however, ranged from 45.8 to 85.7% and suggest a closer agreement between the transect and the VFC methods than between these methods and the RVC. If transect results are assumed to be the most accurate, the comparison suggests that the VFC method yields more accurate relative abundances than does the RVC. Ranges in percent similarity values calculated within each method (8 replicate samples) were used to compare precision among methods. While transect and RVC scores are slightly more precise (ranges of 3.10% and 2.20% respectively) than the VFC method (range = 4.89%), no method was statistically more precise than another (P<0.001).

Catégories Science-Metrix
  • 1 - applied sciences
  • 2 - agriculture, fisheries & forestry
  • 3 - fisheries
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Aquatic Science
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - marine & freshwater biology
  • 1 - science ; 2 - ecology
Identifiant ISTEX

Environmental Biology of Fishes

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