<div><p>Methodology:</p>
<p>Authors surveyed parrotfish assemblages, reef habitat, and predatory coral reef fishes at 82 sites across 31 reef structures on the Northern GBR spanning 6 degrees of latitude.</p>
<p>
Sampling and analytical procedures:</p>
<p>Divers conducted a 40-minute timed swim at 6-10m depth while surveying fish and habitat using a diver-operated stereo video system. A second diver surveyed sharks, caragids, and other highly mobile reef predators on a 20m wide transect. A handheld GPS towed on a buoy enabled accurate reconstruction of survey paths and distances. Parrotfish were recorded to species and measured to nearest mm fork length (FL) using EventMeasure software. Parrotfish with FL < 10cm were excluded. Divers also quantified environmental variables including reef slope, substrate rugosity, and live coral cover. Additional explanatory variables included predator biomass, geographic position (lat/lon), total reef area (ha), and management zone (according to GBRMPA 2003 zoning scheme).</p>
<p>Authors investigated changes in patterns of parrotfish community structure across the Northern GBR in relation to geographic and biophysical factors, as well as across management regimes, using redundancy analysis (RDA). RDA was performed using the “vegan” package in R version 3.5.1.</p>
<p>Survey dives were conducted using SCUBA and a handheld stereo video system consisting of two Canon Legria underwater video cameras. Transects were measured using transect tape and towed GPS.</p></div>
Parrotfish diversity metrics
<div><p>Video was processed with EventMeasure software (SeaGIS Pty Ltd., Bacchus Marsh, Victoria, Australia). </p></div>
828688
Parrotfish diversity metrics
2020-11-10T13:19:28-05:00
2020-11-10T13:19:28-05:00
2020-11-10T14:51:17-05:00
urn:bcodmo:dataset:828688
Parrotfish diversity metrics from a survey across 82 sites on the northern Great Barrier Reef, Australia from surveys conducted in September of 2014
Parrotfish diversity metrics from surveys conducted on the Northern Great Barrier Reef, Australia in September of 2014. The survey included 82 sites across 31 reef structures spanning six degrees of latitude. These data were published in Johnson et al. (2019).
false
Bowen, B., Johnson, G. (2020) Parrotfish diversity metrics from a survey across 82 sites on the northern Great Barrier Reef, Australia from surveys conducted in September of 2014. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2020-11-10 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/828688 [access date]
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2020-11-10
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