In situ observations of the introduced predatory grouper roi (Cephalopholis argus) were taken within the coral reef ecosystem of Puako, northwest side of the Island of Hawaii in 2010-2011. Baseline surveys before roi removal were made in November 2010 and March 2011. After roi removal, a final survey was made in June 2011. A total of 47 transects were surveyed at control, reference, and treatment sites. Observations were made by experienced marine biologists using SCUBA at a depth range of 10-20 m. Tow board and standard visual belt transects were employed.
To test the ecological effects of the introduced predatory grouper roi on a native reef-fish assemblage in Puako, west Hawaii. Objectives: a. Quantify effort required to reduce roi populations. b. Determine immigration patterns of roi into a cleared area. c. Compare fish census and survey methods with catch data to determine fish population abundance. d. Detect any change in the native reef-fish assemblage through a predator removal experiment. e. Collaborate with the fishing community to strengthen partnerships.
NOAASupplemental: Entry_ID: Unknown Sensor_Name: SCUBA Project_Campaign:Hawaii Coral Reef Initiative Originating_Center: Nature Conservancy and Univ. Hawaii Storage_Medium: MS 2007 Excel Reference: None Online_size: 10,018 kbytes
ground condition
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200 West Kawili Street
Hawaii Coral Reef Initiative Tropical Conservation Biology and Environmental Science; University of Hawaii at Hilo Department of Zoology; University of Hawaii at Manoa The Nature Conservancy of Hawai'i
see methodology
quality control completed
METHODOLOGY: Observations were made by SCUBA divers from a small boat platform. Methodology follows standard fish belt transects for fish community surveys. Tow census 1 and 2 were made following NOAA/NMFS Coral Reef Ecosystem Divsion tow-board survey methodology.
DIRECTORY ORGANIZATION, FILE NAMES AND FORMATS: about/ Metadata file: Conklin_Birkeland_JGiddens_Progress1.pdf format: PDF-archive content: A progress report to the Hawaii Coral Reef Initiative. source: downloaded by NODC liaison September 2011 from http://www.hcri.ssri.hawaii.edu/research/conklin2010.html file: Conklin_Birkeland_roi_fish_down_data_Metadata_figure.pdf format: PDF-archive content: map of study area source: exported from Conklin_Birkeland_roi_fish_down_data.xlsx sheet "Metadata" (see below in data/0-data/) file: Conklin_Birkeland_roi_fish_down_data_summary_stats_figure.pdf format: PDF-archive content: graph of results source: exported from Conklin_Birkeland_roi_fish_down_data.xlsx sheet "summary_stats" (see below in data/0-data/) data/ holds data subdirectories: 0-data/ This directory contains the files as provided by the contributor filename: Conklin_Birkeland_roi_fish_down_data.xlsx format: MS Office Excel 2007 content: metadata and data on effort, biometrics, and summary statistics specific to the roi fish that were caught filename: Conklin_Birkeland_Roi_removal_project_fish_community_data.xlsx format: MS Office Excel 2007 content: belt transects and tow-boards to observe the community fish 1-data/ This directory contains files generated by NODC. These files are comma-separated version (CSV) text exports of the unique sheets of the original MS Excel files in 0-data/. There is one file for each sheet within each original MS Excel file. The file name is the original MS Excel filename root appended with the individual sheet name. file: Conklin_Birkeland_roi_fish_down_data_Biometrics.csv column: Date content: Date of survey, rows-2-26, no date, refers to Roi Removal Period, April 2011, see date in Conklin_Birkeland_roi_fish_down_data_Effort.csv column: Fish_ID_maryedit content: Just a different numbering system for Mary's project. Both ID's are correct. column: Fish_ID: content: numbering system to keep track of how many roi measured column: Time_caught content: time in Hawaii Standard Time column: SL(cm) content: SL= standard length (from snout to the start of the caudal peduncle) in cm column: TL(cm) content: TL = total length, from tip of snout to tip of tail fin, cm column: W(kg) content: weight in kg column: Tag_number content: if we caught a fish that we had previously tagged then we recorded the tag number column: GPS content: Reminds us which GPS we were using that day so that we could use waypoints to plot the locations where roi were caught. file: Conklin_Birkeland_roi_fish_down_data_Effort.csv column: date content: month/day/year column: hours content: hour:minute of time spent fishing for a given "effort" column: effort content: fisher-hours, Effort =((time_fishing-INT(time_fishing))*24h/day) column: catch content: count of how many fish were caught on the particular dive column: cpue content: CPUE=catch/effort in hours file: Conklin_Birkeland_roi_fish_down_data_Metadata.csv content: general metadata regarding the project file: Conklin_Birkeland_roi_fish_down_data_summary_stats.csv column: Number content: the number of fish caught weighted by total effort per day columns: Mean, Std Dev, Std Err Mean content: statistics based on regression equation with the slope of the CPUE predicting the original population density of roi in units of CPUE columns: n and cum_catch content: n: catch per survey, cum_catch: cumulative catch file: Conklin_Birkeland_Roi_removal_project_fish_community_data_Abund_Stats_input.csv column: Location content: control, treatment or reference locations column: Baseline content: baseline monitoring period column: Transect content: Transect name columns: Apex predator, Inverts, Primary consumer, Roi, Secondary consumer, Zooplanktivore content: fish guild category, units are average number of fish of this feeding guild observed on this transect (note Inverts means invertebrates) column: Total_Av_biomass_g/m content: Biomass of all fish encountered on that transect in grams per meter. The transects are averaged between two divers observations. The 'total' means the sum of all fish observed, averaged between two divers. file: Conklin_Birkeland_Roi_removal_project_fish_community_data_Conversion_formulas.csv content: conversion coefficients used in calculations of Total Length for each each type of taxa file: Conklin_Birkeland_Roi_removal_project_fish_community_data_Fish.csv column: Location content: control, treatment or reference locations column: Baseline content: baseline monitoring period column: Transect content: Transect name column: Taxa content: taxa type column: Feed Guild content: category of feed guild column: Size_cm content: size in centimeters column: size_class content: range of sizes included in this size class, from the min-max size *if there is a three-letter month at end, then this was caused by Excel assuming the numbers were a date, use the number associated with the month, and if the number of month is lower than the numeral, then the order may be reversed. column: Max_TL content: min-max size range (see * above) column: Average n content: average number caught column: Length_weight(g) content: weight for given length column: Biomass(g/transect) content: biomass in grams per transect column: Biomass(g/m) content: biomass in grams per meter file: Conklin_Birkeland_Roi_removal_project_fish_community_data_Metadata.csv content: general metadata regarding the project file: Conklin_Birkeland_Roi_removal_project_fish_community_data_Tow_census1.csv column: Date content: date of survey column: Diver name content: initials of divers column: Census content: census number column: Transect content: transect number column: Number roi content: number of roi caught column: Size roi content: size of roi in cm column: Time content: time of survey (Hawaii Standard Time) column: Tag_position content: for tagged fish, where on body file: Conklin_Birkeland_Roi_removal_project_fish_community_data_Tow_census2.csv column: Date content: date of survey column: Diver name content: initials of divers column: Census content: census number column: Transect content: transect number column: Number roi content: number of roi caught column: Size roi content: size of roi in cm column: Time content: corrupted, ignore column: Lat content: latitude in decimal degrees column: Long content: longitude in decimal degrees column: Distance_from_GPS content: distance in m from GPS column: Direction_from_GPS content: direction in compass points from GPS column: Tag_position content: for tagged fish, where on body
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