CRED REA Reef Fish Assessment Survey at Oahu Island, Main Hawaiian Islands in 2008

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Title:
CRED REA Reef Fish Assessment Survey at Oahu Island, Main Hawaiian Islands in 2008
Abstract:
To support a long-term NOAA Coral Reef Conservation Program (CRCP) for sustainable management and conservation of coral reef ecosystems, from 16 October - 14 November 2008, reef fish assessment surveys were conducted, as a part of Rapid Ecological Assessments (REA), during the Pacific Reef Assessment and Monitoring Program (RAMP) Cruise OES0810 in the Main Hawaiian Islands at biennial intervals by the Coral Reef Ecosystem Division (CRED) at the NOAA Pacific Islands Fisheries Science Center (PIFSC). During the cruise, 15 REA sites were surveyed at Oahu Island in the Main Hawaiian Islands. At the specific REA sites, fish biologists along with coral biologists, algal biologists and marine invertebrate zoologist entered the water and conducted a fine-scale (~300 m2) and high degree of taxonomic resolution REA survey to assess and monitor species composition, abundance, percent cover, size distribution, diversity, and general health of fish, corals, macro-invertebrates, and algae in shallow-water (< 35 m) habitats. Reef fish assessment surveys were focused on cataloging the diversity (species richness), abundance (numeric density [# fish 100 m-2] and biomass density [kg 100 m-2]) of diurnally active reef fish assemblages. Three complementary noninvasive underwater survey methods were used, including belt-transect, stationary point count, and roving-diver surveys. For all methods, fish were identified at the species level, when possible, and assigned to a size bin ranging from 1 to 200 cm based on a visual estimate of total fish length. Belt-transect (BLT) surveys were used to quantify the entire diurnal fish community (all size classes). In belt-transect surveys, two fish biologists swam side-by-side along three consecutively-placed, 25m transect lines. The BLT team swam each transect two times. During the initial swim-out, each fish diver recorded all fish larger than 20 cm observed within a 4-m wide belt perpendicular to their respective side of the transect (200 m2 area per line, 100 m2 per diver). On the return swim, each fish diver recorded all fish less than 20 cm observed within a 2-m wide belt (100 m2 area per line, 50 m2 per diver). The survey of large fish took approximately 5 min to complete while the survey of smaller fish took about 10 min to complete. All reef-associated fish, including those in the water column (including planktivores), were counted. Any coastal pelagic species (e.g., clupeids [sardines], belonids [beakfish], antherinids [silversides]) seen near the surface were not recorded. The stationary point count (SPC) method were used to quantify larger, more mobile reef fish species that can be missed on belt-transect surveys. In stationary point count survey, a fish biologist swam approximately 15 m away from a transect line concurrently being surveyed by the other two BLT fish biologists. The SPC biologist then recorded all fish greater than 25 cm in length that passed within a visually estimated 20-m diameter cylinder centered on the diver's fixed position (10-m radius, total area = 314 m2). The survey time for each stationary point count survey was 5 min and a total of four stationary point count surveys were conducted at each REA site. Roving-diver surveys were followed belt-transect and stationary point count surveys. As diver bottom time permitted, the fish assessment team conducted random swim surveys throughout the REA site area, recording, to the species level or the lowest recognizable taxon, the presence of reef fish not encountered during previous methods.
Supplemental_Information:
Maximum depth was 22 meters. Fish species observed: Year Region Island Species TaxonName 2008 MHI Oahu ABAB Abudefduf abdominalis 2008 MHI Oahu ABVA Abudefduf vaigiensis 2008 MHI Oahu ACAC Acanthurus achilles 2008 MHI Oahu ACDU Acanthurus dussumieri 2008 MHI Oahu ACLE Acanthurus leucopareius 2008 MHI Oahu ACNF Acanthurus nigrofuscus 2008 MHI Oahu ACNR Acanthurus nigroris 2008 MHI Oahu ACOL Acanthurus olivaceus 2008 MHI Oahu ACTH Acanthurus thompsoni 2008 MHI Oahu ACTR Acanthurus triostegus 2008 MHI Oahu ACXA Acanthurus xanthopterus 2008 MHI Oahu ANCH Anampses chrysocephalus 2008 MHI Oahu ANCU Anampses cuvier 2008 MHI Oahu APFU Aphareus furca 2008 MHI Oahu APKA Apogon kallopterus 2008 MHI Oahu APVI Aprion virescens 2008 MHI Oahu ARME Arothron meleagris 2008 MHI Oahu AUCH Aulostomus chinensis 2008 MHI Oahu BOBI Bodianus bilunulatus 2008 MHI Oahu CACA Calotomus carolinus 2008 MHI Oahu CADU Cantherhines dumerilii 2008 MHI Oahu CASA Cantherhines sandwichiensis 2008 MHI Oahu CAAM Canthigaster amboinensis 2008 MHI Oahu CACO Canthigaster coronata 2008 MHI Oahu CAJA Canthigaster jactator 2008 MHI Oahu CAME Caranx melampygus 2008 MHI Oahu CAGA Carcharhinus galapagensis 2008 MHI Oahu CEFI Centropyge fisheri 2008 MHI Oahu CEPO Centropyge potteri 2008 MHI Oahu CEAR Cephalopholis argus 2008 MHI Oahu CHAU Chaetodon auriga 2008 MHI Oahu CHEP Chaetodon ephippium 2008 MHI Oahu CHFR Chaetodon fremblii 2008 MHI Oahu CHKL Chaetodon kleinii 2008 MHI Oahu CHLI Chaetodon lineolatus 2008 MHI Oahu CHLU Chaetodon lunula 2008 MHI Oahu CHMI Chaetodon miliaris 2008 MHI Oahu CHMU Chaetodon multicinctus 2008 MHI Oahu CHOR Chaetodon ornatissimus 2008 MHI Oahu CHQU Chaetodon quadrimaculatus 2008 MHI Oahu CHRE Chaetodon reticulatus 2008 MHI Oahu CHUN Chaetodon unimaculatus 2008 MHI Oahu CHIN Cheilio inermis 2008 MHI Oahu CHPE Chlorurus perspicillatus 2008 MHI Oahu CHSO Chlorurus sordidus 2008 MHI Oahu CHAG Chromis agilis 2008 MHI Oahu CHHA Chromis hanui 2008 MHI Oahu CHOV Chromis ovalis 2008 MHI Oahu CHVA Chromis vanderbilti 2008 MHI Oahu CHVE Chromis verater 2008 MHI Oahu CIFA Cirrhitops fasciatus 2008 MHI Oahu CIPI Cirrhitus pinnulatus 2008 MHI Oahu CIVA Cirripectes vanderbilti 2008 MHI Oahu COFL Coris flavovittata 2008 MHI Oahu COGA Coris gaimard 2008 MHI Oahu COVE Coris venusta 2008 MHI Oahu CTST Ctenochaetus strigosus 2008 MHI Oahu DAAL Dascyllus albisella 2008 MHI Oahu DEMA Decapterus macarellus 2008 MHI Oahu DIHO Diodon holocanthus 2008 MHI Oahu FICO Fistularia commersonii 2008 MHI Oahu FOFL Forcipiger flavissimus 2008 MHI Oahu FOLO Forcipiger longirostris 2008 MHI Oahu GOVA Gomphosus varius 2008 MHI Oahu GUCU Gunnellichthys curiosus 2008 MHI Oahu GYZE Gymnomuraena zebra 2008 MHI Oahu GYFL Gymnothorax flavimarginatus 2008 MHI Oahu GYME Gymnothorax meleagris 2008 MHI Oahu HAOR Halichoeres ornatissimus 2008 MHI Oahu INUM Iniistius umbrilatus 2008 MHI Oahu CHUB Kyphosidae sp 2008 MHI Oahu KYHA Kyphosus hawaiiensis 2008 MHI Oahu KYSA Kyphosus sandwicensis 2008 MHI Oahu LAPH Labroides phthirophagus 2008 MHI Oahu LUKA Lutjanus kasmira 2008 MHI Oahu MAGE Macropharyngodon geoffroy 2008 MHI Oahu MABR Malacanthus brevirostris 2008 MHI Oahu MENI Melichthys niger 2008 MHI Oahu MEVI Melichthys vidua 2008 MHI Oahu MOGR Monotaxis grandoculis 2008 MHI Oahu MUFL Mulloidichthys flavolineatus 2008 MHI Oahu MUVA Mulloidichthys vanicolensis 2008 MHI Oahu MYBE Myripristis berndti 2008 MHI Oahu NABR Naso brevirostris 2008 MHI Oahu NACA Naso caesius 2008 MHI Oahu NAHE Naso hexacanthus 2008 MHI Oahu NALI Naso lituratus 2008 MHI Oahu NASP Naso sp 2008 MHI Oahu NAUN Naso unicornis 2008 MHI Oahu NONE no individuals seen 2008 MHI Oahu NOTA Novaculichthys taeniourus 2008 MHI Oahu OSME Ostracion meleagris 2008 MHI Oahu OXBI Oxycheilinus bimaculatus 2008 MHI Oahu PAAR Paracirrhites arcatus 2008 MHI Oahu PAFO Paracirrhites forsteri 2008 MHI Oahu PASC Parapercis schauinslandii 2008 MHI Oahu PACY Parupeneus cyclostomus 2008 MHI Oahu PAIN Parupeneus insularis 2008 MHI Oahu PAMU Parupeneus multifasciatus 2008 MHI Oahu PAPL Parupeneus pleurostigma 2008 MHI Oahu PEAS Pervagor aspricaudus 2008 MHI Oahu PLEW Plagiotremus ewaensis 2008 MHI Oahu PLGO Plagiotremus goslinei 2008 MHI Oahu PLIM Plectroglyphidodon imparipennis 2008 MHI Oahu PLJO Plectroglyphidodon johnstonianus 2008 MHI Oahu PSBI Pseudanthias bicolor 2008 MHI Oahu PSEV Pseudocheilinus evanidus 2008 MHI Oahu PSOC Pseudocheilinus octotaenia 2008 MHI Oahu PSTE Pseudocheilinus tetrataenia 2008 MHI Oahu PSCE Pseudojuloides cerasinus 2008 MHI Oahu PTHE Ptereleotris heteroptera 2008 MHI Oahu RHRE Rhinecanthus rectangulus 2008 MHI Oahu SAXA Sargocentron xantherythrum 2008 MHI Oahu PARR Scaridae sp 2008 MHI Oahu SCPS Scarus psittacus 2008 MHI Oahu SCRU Scarus rubroviolaceus 2008 MHI Oahu SCSP Scarus sp 2008 MHI Oahu SECO Sebastapistes coniorta 2008 MHI Oahu STFA Stegastes fasciolatus 2008 MHI Oahu STBA Stethojulis balteata 2008 MHI Oahu SUBU Sufflamen bursa 2008 MHI Oahu SUFR Sufflamen fraenatum 2008 MHI Oahu TATR Taenianotus triacanthus 2008 MHI Oahu THBA Thalassoma ballieui 2008 MHI Oahu THDU Thalassoma duperrey 2008 MHI Oahu THPU Thalassoma purpureum 2008 MHI Oahu THQU Thalassoma quinquevittatum 2008 MHI Oahu THTR Thalassoma trilobatum 2008 MHI Oahu ZACO Zanclus cornutus 2008 MHI Oahu ZEFL Zebrasoma flavescens 2008 MHI Oahu ZEVE Zebrasoma veliferum
  1. How might this data set be cited?
    Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA), 20101115, CRED REA Reef Fish Assessment Survey at Oahu Island, Main Hawaiian Islands in 2008.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -158.280969
    East_Bounding_Coordinate: -157.648625
    North_Bounding_Coordinate: 21.712459
    South_Bounding_Coordinate: 21.254737
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Beginning_Date: 12-Nov-2008
    Ending_Date: 13-Nov-2008Currentness_Reference: Ground condition
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: spreadsheet
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
    2. What coordinate system is used to represent geographic features?
      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.0001. Longitudes are given to the nearest 0.0001. Latitude and longitude values are specified in Decimal Degrees. The horizontal datum used is World Geodetic System 1984 (WGS84).
      The ellipsoid used is Geodetic Reference System 80 (GRS80).
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.2572236.
      Vertical_Coordinate_System_Definition:
      Depth_System_Definition:
      Depth_Datum_Name: Local surface
      Depth_Resolution: 1
      Depth_Distance_Units: meters
      Depth_Encoding_Method: Explicit Depth Coordinate Included with Horizontal Coordinates
  7. How does the data set describe geographic features?

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
  2. Who also contributed to the data set?
    "Marc Nadon, Kostantinos Stamoulis, Marie Ferguson, Kevin O'Brien", Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Sciences Center, National Marine Fisheries Service, NOAA
  3. To whom should users address questions about the data?
    Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
    Attn: Ivor Williams
    NOAA IRC
    Honolulu, HI
    USA

    808 725-5360 (voice)
    808 725-5429 (FAX)
    nmfs.pic.credinfo@noaa.gov
    Contact_Instructions: e-mail preferred

Why was the data set created?

Part of a long-term monitoring program at biennial intervals which documents the state of the reefs.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: Unknown (process 1 of 1)
    REA surveys are investigations that provide a high degree of taxonomic resolution for coral, algae, other macroinvertebrate, and reef fish communities. The surveys were conducted using a combination of dive teams which generally included a two to three person fish team, a two person coral/coral disease team, and a combined team of two algae biologists and one macroinvertebrate biologist. The majority of REA surveys were conducted along the forereef slopes of individual islands at depths between 10 and 20 m. However, additional surveyed habitats included a lagoonal-type patch reef and offshore oceanic banks. During REA surveys, biological assessment teams follow highly structured protocols that are repeated at each REA site. Upon arrival at an REA site, three teams of divers enter the water over spaced time intervals. The fish team firstly enters the water and deploys a 25-m transect line. Two of the fish divers begin to survey along that transect while the remaining fish diver begins stationary point count assessments in the general vicinity. After approximately 20 min, the coral team enters the water and begins to work along the first transect line. By this time the fish team has deployed and begun surveys along a second 25-m transect. About 10 min later, the algal/invertebrate team enters the water and begins surveying the first transect. In total, the fish team surveys three transects at each site (transects 1, 2, and 3), and the coral and algal/invertebrate teams survey transects 1 and 2. The sampling effort takes between 60 and 80 min to complete. The selection of REA sites was made in close consultation with Coral Reef Advisory Group (CRAG) and local agencies. Factors considered during REA site selection included: (1) ensuring a range of sample sites representative of the benthic and reef fish habitats around each island; (2) selecting a mixture of sites within and outside of marine protected areas; (3) selecting a mixture of both 'impacted' and 'least impacted' sites; (4) selecting some sites adjacent to local villages, and (5) selecting a number of sites that could be compared to and complement previous assessment and monitoring work as well as future coral reef monitoring proposed by CRAG and local agencies. It is important to note that access to REA sites can be limited by wave exposure, weather conditions, and other environmental factors such as currents, which can affect the ability to resurvey sites between years. Transect placement was guided by: (1) a focus on hard-bottom communities; (2) deploying lines along an isobath to the extent possible at each site, and (3) laying the transect lines into the prevailing current.
  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    Observations at each site were made by three divers who are experts in fish taxonomy. The team of three REA fish divers rotated roles with two divers performing belt-transect surveys and one diver performing stationary point counts at each survey site. Observations were periodically checked during the expedition for consistency between divers, and little discrepancy was ever noted between divers. It should be noted, however, that this data set is quite large, and probably includes typographical or other errors that might be discovered at a future date.
  2. How accurate are the geographic locations?
    GPS unit
  3. How accurate are the heights or depths?
    Dive computer and SCUBA depth gauge
  4. Where are the gaps in the data? What is missing?
    The survey sites were selected to be representative of the coral reef habitats at this reef system. Efforts were made to include broad spatial coverage of the reef area, but weather conditions or other environmental constraints may have precluded the team from surveying windward or exposed sites.
  5. How consistent are the relationships among the observations, including topology?
    The same methods of data collection were used at each of the sites surveyed at this location, and were conducted by the same scientists. Periodic examination of the data through the duration of the trip showed no signs of diver bias or other discrepancies.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: Data are available two years following data collection date.
Use_Constraints:
Please cite CRED when using the data. Coral Reef Ecosystem Division, Pacific Islands Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration
  1. Who distributes the data set? (Distributor 1 of 1)
    Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
    Attn: CRED Data Management Team
    NOAA IRC
    Honolulu, HI
    USA

    808 725-5360 (voice)
    808 725-5429 (FAX)
    nmfs.pic.credinfo@noaa.gov
    Contact_Instructions: e-mail preferred
  2. What's the catalog number I need to order this data set? Offline Data
  3. What legal disclaimers am I supposed to read?
    While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
  4. How can I download or order the data?
  5. Is there some other way to get the data?
    Contact CRED data management team for information
  6. What hardware or software do I need in order to use the data set?
    Contact CRED data management team for information

Who wrote the metadata?

Dates:
Last modified: 26-May-2019
Last Reviewed: 14-Sep-2009
Metadata author:
Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
NOAA IRC
Honolulu, HI
USA

808 725-5360 (voice)
808 725-5429 (FAX)
nmfs.pic.credinfo@noaa.gov
Contact_Instructions: e-mail preferred
Metadata standard:
the Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
Generated by mp version 2.9.44 on Sat Jul 12 20:52:18 2025