Dataset: Parrotfish environmental data

Name: Parrotfish assemblages, reef habitat, and predatory coral reef fish data from a survey at 82 sites across 31 reef structures on the Northern Great Barrier Reef, Australia in September of 2014
Published: 2020-11-10
Keywords: oceans

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Cite This Dataset

Spatial Extent: N:-11.05949 E:146.251861 S:-16.863446 W:143.03557

Temporal Extent: 2014-09

Project:

Origins of Hawaiian Reef Fishes (Hawaiian Fish Origins)

Program:

Indo-Pac Research Coordination Network (Indo-Pac RCN)

Principal Investigator:

Brian Bowen (University of Hawaiʻi at Mānoa, HIMB)

Contact:

Garrett Johnson (University of Hawaiʻi at Mānoa, HIMB)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2020-11-10

Restricted:

Validated:

Current State:

Data not available

Parrotfish assemblages, reef habitat, and predatory coral reef fish data from a survey at 82 sites across 31 reef structures on the Northern Great Barrier Reef, Australia in September of 2014

Abstract:

Parrotfish assemblages, reef habitat, and predatory coral reef fish data 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. This dataset contains the main environmental parameters for the 82 sites in this study along with site names, latitudes, and longitudes. These data were published in Johnson et al. (2019).

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Methods & Sampling

Sampling and analytical procedures:

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). 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.

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.

Data Processing Description

Data were analyzed in R 3.5.1 using redundancy analysis (RDA) in the package vegan. Video was processed with EventMeasure software (SeaGIS Pty Ltd., Bacchus Marsh, Victoria, Australia).

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1558852

Deployments

None available yet

Instruments

Self-Contained Underwater Breathing Apparatus

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: Self-Contained Underwater Breathing Apparatus

Acronym: SCUBA

Generic Description:

The self-contained underwater breathing apparatus or scuba diving system is the result of technological developments and innovations that began almost 300 years ago. Scuba diving is the most extensively used system for breathing underwater by recreational divers throughout the world and in various forms is also widely used to perform underwater work for military, scientific, and commercial purposes.

Reference: https://oceanexplorer.noaa.gov/technology/technical/technical.html

Underwater Camera

Supplied Name: Canon Legria underwater video cameras

Supplied Description:

Handheld stereo video system consisting of two Canon Legria underwater video cameras.

Instrument Type

Generic Name: Underwater Camera

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/180/

Generic Description:

All types of photographic equipment that may be deployed underwater including stills, video, film and digital systems.

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
SITE	site name	unitless	site
SHELF	shelf position: outer shelf or mid shelf	unitless	site_descrip
ZONE	protection zone: Pink,Green,or Blue	unitless	site_descrip
BIOM_PRED	biomass of predatory species	kilograms per hectare (kg/ha)	wet_weight_biomass
RUGOSITY	measure of habitat rugosity	unitless	no_bcodmo_term
CORAL	measure of benthic coral cover	unitless	percent_cover
SLOPE	slope of the reef substrate	degrees	no_bcodmo_term
LAT	latitude	decimal degrees	lat
LONG	longitude	decimal degrees	lon
AREA_HA	total area of the REEF	hecatares (ha)	site_descrip
CHLA	measure of chlorophyll-a concentration,remotely sensed	unknown	chl_a
SST	measure of sea surface temperature,remotely sensed	unknown	SST
DATE	Month and year in format mmm-yy (e.g. Sep-14)	unitless	Date_Month

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Dataset: Parrotfish environmental data