A Stationary Visual Census Technique for QuantitativelyAssessing Community Structure of Coral Reef Fishes
Document (DOC) | Southeast Fisheries Science Center (SEFSC)GUID: gov.noaa.nmfs.inport:37042 | Updated: August 9, 2022 | Published / External
Item Identification
Title: | A Stationary Visual Census Technique for QuantitativelyAssessing Community Structure of Coral Reef Fishes |
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Status: | Completed |
Abstract: |
A new method is described and evaluated for visually sampling reef fish community structure in environments with highly diverse and abundant reef fish populations. The method is based on censuses of reef fishes taken within a cylinder of 7.5 m radius by a diver at randomly selected, stationary points. The method provides quantitative data on frequency of occurrence, fish length, abundance, and community composition, and is simple, fast, objective, and repeatable. Species are accumulated rapidly for listing purposes, and large numbers of samples are easily obtained for statistical treatment. The method provides an alternative to traditional visual sampling methods. Observations showed that there were no significant differences in total numbers of species or individuals censused when visibility ranged between 8 and 30 m. The reefs and habitats sampled were significant sources of variation in number of species and individuals censused, but the diver was not a significant influence. Community similarity indices were influenced significantly by the specific sampling site and the reef sampled, but were not significantly affected by the habitat or diver. |
Purpose: |
To describe and evaluate a technique for providing quantitative data on frequency of occurrence, fish length, abundance, and community composition, in a simple, fast, objective manner, for visually sampling reef fish community structure in environments with highly diverse and abundant reef fish populations. |
Other Citation Details: |
NOAATechnical Report NMFS 41, dated July 1986, titled, A Stationary Visual Census Technique for QuantitativelyAssessing Community Structure of Coral Reef Fishes by James A. Bohnsack and Scott P. Bannerot |
Document Information
Document Type: | Technical Memorandum |
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Format: | Acrobat Portable Document Format |
Status Code: | Published |
Support Roles
Author
Date Effective From: | 1985 |
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Date Effective To: | |
Contact (Person): | Bohnsack, James A |
URL: | Researchgate Page Dr Jim Bohnsack |
Access Information
Security Class: | Unclassified |
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Data Access Policy: |
Open to everyone |
Data Access Procedure: |
download from provided link |
URLs
URL 1
URL: | https://docs.lib.noaa.gov/noaa_documents/NMFS/TR_NMFS/TR_NMFS_41.pdf |
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URL Type: |
Online Resource
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Description: |
document itself |
Catalog Details
Catalog Item ID: | 37042 |
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GUID: | gov.noaa.nmfs.inport:37042 |
Metadata Record Created By: | Lee M Weinberger |
Metadata Record Created: | 2017-03-07 13:26+0000 |
Metadata Record Last Modified By: | SysAdmin InPortAdmin |
Metadata Record Last Modified: | 2022-08-09 17:11+0000 |
Metadata Record Published: | 2022-02-28 |
Owner Org: | SEFSC |
Metadata Publication Status: | Published Externally |
Do Not Publish?: | N |
Metadata Last Review Date: | 2022-02-28 |
Metadata Review Frequency: | 1 Year |
Metadata Next Review Date: | 2023-02-28 |