DIVER-BASED UNDER WATER SURVEY TECHNIQUES USED TO ASSESS FISH POPULATIONS AND FOULING COMMUNITY DEVELOPMENT ON OFFSHORE OIL AND GAS PLATFORM STRUCTURES.

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DIVER-BASED UNDER WATER SURVEY TECHNIQUES USED TO ASSESS FISH POPULATIONS AND FOULING COMMUNITY DEVELOPMENT ON OFFSHORE OIL AND GAS PLATFORM STRUCTURES.

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Title: DIVER-BASED UNDER WATER SURVEY TECHNIQUES USED TO ASSESS FISH POPULATIONS AND FOULING COMMUNITY DEVELOPMENT ON OFFSHORE OIL AND GAS PLATFORM STRUCTURES.
Author: Cox, SA; Beaver, CR; Dokken, QR; Rooker, JR
Abstract: In the northwestern Gulf of Mexico the most common material of opportunity for artificial reef development is the steel-jacket structure of oil and gas production platforms. Investigations of fouling community populations as well as fin fish assemblages have been conducted primarily by nondestructive techniques. Photographic transects and rugosity measurements are used to determine sessile community development and structure. In addition, 10 cm3sections of the fouling community are collected for qualitative and quantitative assessment of cryptic species. Rugosity was determined by measuring the relief created by the fouling community organisms between two points set 1 m apart. The degree of fouling is measured as t h e difference between the circumference measured around the surface of the community and the actual circumference of the bare-pipe structure on which the fouling community is attached. Transect survey techniques and stationary visual census methods are employed for assessing fish populations. Fish counts are conducted simultaneously by two or three dive teams twice each day using stationary count methods. A suite of statistical analyses including ANOVA, Tukey's HSD, Pearsons's Correlation Coefficient, Shannon Diversity Indices and Morisita's Diversity Index, is utilized to analyze the data collected.
Description: American Academy of Underwater Sciences (http://www.aaus.org/)
URI: http://archive.rubicon-foundation.org/4689
Date: 1996

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