Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
20090508
CRED REA Reef Fish Assessment Survey at Alamagan Island, Marianas Archipelago in 2009
spreadsheet
https://www.fisheries.noaa.gov/pacific-islands/ecosystems/coral-reefs-pacific
To support a long-term NOAA Coral Reef Conservation Program (CRCP) for sustainable management and conservation of coral reef ecosystems, from 15 April - 7 May 2009, reef fish assessment surveys were conducted, as a part of Rapid Ecological Assessments (REA), during the Pacific Reef Assessment and Monitoring Program (RAMP) Cruise HI0903 in the Marianas Archipelago at biennial intervals by the Coral Reef Ecosystem Division (CRED) at the NOAA Pacific Islands Fisheries Science Center (PIFSC). During the cruise, 6 REA sites were surveyed at Alamagan Island in the Marianas Archipelago.
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.
Part of a long-term monitoring program at biennial intervals which documents the state of the reefs.
Maximum depth was 25 meters.
Fish species observed:
Year Region Island Species TaxonName
2009 MARIAN Alamagan ACBL Acanthurus blochii
2009 MARIAN Alamagan ACDU Acanthurus dussumieri
2009 MARIAN Alamagan ACGU Acanthurus guttatus
2009 MARIAN Alamagan ACLE Acanthurus leucopareius
2009 MARIAN Alamagan ACLI Acanthurus lineatus
2009 MARIAN Alamagan ACNC Acanthurus nigricans
2009 MARIAN Alamagan ACNF Acanthurus nigrofuscus
2009 MARIAN Alamagan ACOL Acanthurus olivaceus
2009 MARIAN Alamagan ACPY Acanthurus pyroferus
2009 MARIAN Alamagan ACTH Acanthurus thompsoni
2009 MARIAN Alamagan ANCA Anampses caeruleopunctatus
2009 MARIAN Alamagan APFU Aphareus furca
2009 MARIAN Alamagan APAN Apogon angustatus
2009 MARIAN Alamagan APTR Apolemichthys trimaculatus
2009 MARIAN Alamagan APVI Aprion virescens
2009 MARIAN Alamagan BAUN Balistapus undulatus
2009 MARIAN Alamagan BACO Balistoides conspicillum
2009 MARIAN Alamagan BOAX Bodianus axillaris
2009 MARIAN Alamagan CATE Caesio teres
2009 MARIAN Alamagan CACA Calotomus carolinus
2009 MARIAN Alamagan CADU Cantherhines dumerilii
2009 MARIAN Alamagan CAAM Canthigaster amboinensis
2009 MARIAN Alamagan CASO Canthigaster solandri
2009 MARIAN Alamagan CAOR Carangoides orthogrammus
2009 MARIAN Alamagan CAIG Caranx ignobilis
2009 MARIAN Alamagan CALU Caranx lugubris
2009 MARIAN Alamagan CAME Caranx melampygus
2009 MARIAN Alamagan CASE Caranx sexfasciatus
2009 MARIAN Alamagan CAAB Carcharhinus amblyrhynchos
2009 MARIAN Alamagan CEFL Centropyge flavissima
2009 MARIAN Alamagan CEHE Centropyge heraldi
2009 MARIAN Alamagan CESH Centropyge shepardi
2009 MARIAN Alamagan CEAR Cephalopholis argus
2009 MARIAN Alamagan CESX Cephalopholis sexmaculata
2009 MARIAN Alamagan CESO Cephalopholis sonnerati
2009 MARIAN Alamagan CESP Cephalopholis spiloparaea
2009 MARIAN Alamagan CEUR Cephalopholis urodeta
2009 MARIAN Alamagan CHAU Chaetodon auriga
2009 MARIAN Alamagan CHCI Chaetodon citrinellus
2009 MARIAN Alamagan CHEP Chaetodon ephippium
2009 MARIAN Alamagan CHLU Chaetodon lunula
2009 MARIAN Alamagan CHMR Chaetodon mertensii
2009 MARIAN Alamagan CHOR Chaetodon ornatissimus
2009 MARIAN Alamagan CHPU Chaetodon punctatofasciatus
2009 MARIAN Alamagan CHQU Chaetodon quadrimaculatus
2009 MARIAN Alamagan CHRE Chaetodon reticulatus
2009 MARIAN Alamagan CHUL Chaetodon ulietensis
2009 MARIAN Alamagan CHUN Chaetodon unimaculatus
2009 MARIAN Alamagan CHUD Cheilinus undulatus
2009 MARIAN Alamagan CHMC Chlorurus microrhinos
2009 MARIAN Alamagan CHAC Chromis acares
2009 MARIAN Alamagan CHAG Chromis agilis
2009 MARIAN Alamagan CHMA Chromis margaritifer
2009 MARIAN Alamagan CHVA Chromis vanderbilti
2009 MARIAN Alamagan CHXA Chromis xanthura
2009 MARIAN Alamagan CHBR Chrysiptera brownriggii
2009 MARIAN Alamagan CIKA Cirrhilabrus katherinae
2009 MARIAN Alamagan CIFL Cirrhitichthys falco
2009 MARIAN Alamagan CIVR Cirripectes variolosus
2009 MARIAN Alamagan COAY Coris aygula
2009 MARIAN Alamagan COGA Coris gaimard
2009 MARIAN Alamagan CTCY Ctenochaetus cyanocheilus
2009 MARIAN Alamagan CTHA Ctenochaetus hawaiiensis
2009 MARIAN Alamagan CTSR Ctenochaetus striatus
2009 MARIAN Alamagan DARE Dascyllus reticulatus
2009 MARIAN Alamagan EPFA Epinephelus fasciatus
2009 MARIAN Alamagan EPHE Epinephelus hexagonatus
2009 MARIAN Alamagan EPMA Epinephelus maculatus
2009 MARIAN Alamagan FOFL Forcipiger flavissimus
2009 MARIAN Alamagan GNAU Gnathodentex aureolineatus
2009 MARIAN Alamagan GOVA Gomphosus varius
2009 MARIAN Alamagan GRAL Gracila albomarginata
2009 MARIAN Alamagan GYFL Gymnothorax flavimarginatus
2009 MARIAN Alamagan GYUN Gymnothorax undulatus
2009 MARIAN Alamagan HAHO Halichoeres hortulanus
2009 MARIAN Alamagan HAOR Halichoeres ornatissimus
2009 MARIAN Alamagan HEFA Hemigymnus fasciatus
2009 MARIAN Alamagan HECH Heniochus chrysostomus
2009 MARIAN Alamagan HECR Heteropriacanthus cruentatus
2009 MARIAN Alamagan CHUB Kyphosidae sp
2009 MARIAN Alamagan KYCI Kyphosus cinerascens
2009 MARIAN Alamagan KYPA Kyphosus pacificus
2009 MARIAN Alamagan WRAS Labridae sp
2009 MARIAN Alamagan LABI Labroides bicolor
2009 MARIAN Alamagan LADI Labroides dimidiatus
2009 MARIAN Alamagan LAXA Labropsis xanthonota
2009 MARIAN Alamagan LUBO Lutjanus bohar
2009 MARIAN Alamagan LUGI Lutjanus gibbus
2009 MARIAN Alamagan LUKA Lutjanus kasmira
2009 MARIAN Alamagan LUMO Lutjanus monostigma
2009 MARIAN Alamagan MAMA Macolor macularis
2009 MARIAN Alamagan MANI Macolor niger
2009 MARIAN Alamagan MAME Macropharyngodon meleagris
2009 MARIAN Alamagan MENI Melichthys niger
2009 MARIAN Alamagan MEVI Melichthys vidua
2009 MARIAN Alamagan MOGR Monotaxis grandoculis
2009 MARIAN Alamagan MORA Muraenidae sp
2009 MARIAN Alamagan MYBE Myripristis berndti
2009 MARIAN Alamagan NABR Naso brevirostris
2009 MARIAN Alamagan NACA Naso caesius
2009 MARIAN Alamagan NAHE Naso hexacanthus
2009 MARIAN Alamagan NALI Naso lituratus
2009 MARIAN Alamagan NAVL Naso vlamingii
2009 MARIAN Alamagan NEMA Nemateleotris magnifica
2009 MARIAN Alamagan NEAR Neocirrhites armatus
2009 MARIAN Alamagan NEOP Neoniphon opercularis
2009 MARIAN Alamagan NESA Neoniphon sammara
2009 MARIAN Alamagan ODNI Odonus niger
2009 MARIAN Alamagan OXDI Oxycheilinus digramma
2009 MARIAN Alamagan OXUN Oxycheilinus unifasciatus
2009 MARIAN Alamagan PAHP Paracanthurus hepatus
2009 MARIAN Alamagan PAAR Paracirrhites arcatus
2009 MARIAN Alamagan PAFO Paracirrhites forsteri
2009 MARIAN Alamagan PAHE Paracirrhites hemistictus
2009 MARIAN Alamagan PACL Parapercis clathrata
2009 MARIAN Alamagan PAMI Parapercis millepunctata
2009 MARIAN Alamagan PACY Parupeneus cyclostomus
2009 MARIAN Alamagan PAIN Parupeneus insularis
2009 MARIAN Alamagan PAMU Parupeneus multifasciatus
2009 MARIAN Alamagan PEOU Pempheris oualensis
2009 MARIAN Alamagan PLGI Plectorhinchus gibbosus
2009 MARIAN Alamagan PLDI Plectroglyphidodon dickii
2009 MARIAN Alamagan PLIM Plectroglyphidodon imparipennis
2009 MARIAN Alamagan PLJO Plectroglyphidodon johnstonianus
2009 MARIAN Alamagan PLLA Plectroglyphidodon lacrymatus
2009 MARIAN Alamagan PLLE Plectroglyphidodon leucozonus
2009 MARIAN Alamagan POIM Pomacanthus imperator
2009 MARIAN Alamagan POVA Pomacentrus vaiuli
2009 MARIAN Alamagan POGU Pomachromis guamensis
2009 MARIAN Alamagan PSPA Pseudanthias pascalus
2009 MARIAN Alamagan PSEV Pseudocheilinus evanidus
2009 MARIAN Alamagan PSHE Pseudocheilinus hexataenia
2009 MARIAN Alamagan PSOC Pseudocheilinus octotaenia
2009 MARIAN Alamagan PSTE Pseudocheilinus tetrataenia
2009 MARIAN Alamagan PSMO Pseudodax moluccanus
2009 MARIAN Alamagan PSAT Pseudojuloides atavai
2009 MARIAN Alamagan PTEV Ptereleotris evides
2009 MARIAN Alamagan PTHE Ptereleotris heteroptera
2009 MARIAN Alamagan PTZE Ptereleotris zebra
2009 MARIAN Alamagan PTTI Pterocaesio tile
2009 MARIAN Alamagan PYDI Pygoplites diacanthus
2009 MARIAN Alamagan RHRE Rhinecanthus rectangulus
2009 MARIAN Alamagan SACA Sargocentron caudimaculatum
2009 MARIAN Alamagan SASP Sargocentron spiniferum
2009 MARIAN Alamagan SATI Sargocentron tiere
2009 MARIAN Alamagan SCFO Scarus forsteni
2009 MARIAN Alamagan SCRU Scarus rubroviolaceus
2009 MARIAN Alamagan SCLY Scomberoides lysan
2009 MARIAN Alamagan SPQE Sphyraena qenie
2009 MARIAN Alamagan STFA Stegastes fasciolatus
2009 MARIAN Alamagan SUBU Sufflamen bursa
2009 MARIAN Alamagan SUCH Sufflamen chrysopterum
2009 MARIAN Alamagan TAME Taeniura meyeni
2009 MARIAN Alamagan THAM Thalassoma amblycephalum
2009 MARIAN Alamagan THLU Thalassoma lutescens
2009 MARIAN Alamagan THQU Thalassoma quinquevittatum
2009 MARIAN Alamagan THTR Thalassoma trilobatum
2009 MARIAN Alamagan THAL Thunnus albacares
2009 MARIAN Alamagan TROB Triaenodon obesus
2009 MARIAN Alamagan VAST Valenciennea strigata
2009 MARIAN Alamagan VALO Variola louti
2009 MARIAN Alamagan XACA Xanthichthys caeruleolineatus
2009 MARIAN Alamagan ZACO Zanclus cornutus
2009 MARIAN Alamagan ZEFL Zebrasoma flavescens
20090504
20090504
Ground condition
asNeeded
145.803113
145.863562
17.628686
17.571253
NCEI Geoportal FilterCoRIS_MetadataCRCP ProjectPacific Reef Assessment and Monitoring Program (Pacific RAMP): Biennial monitoring for the U.S. Pacific Islands and Atolls1221
None
Marine Ecosystem
Reef Assessment and Monitoring Program (RAMP)
Rapid Ecological Assessments (REA)
Coral Reef
Reef Fishes
Belt Transect (BLT) Survey
Stationary Point Count (SPC )Surveys
Roving-diver surveys
Marianas Archipelago
Alamagan Island
HI0903
CoRIS Discovery Thesaurus
Numeric Data Sets > Biology
CoRIS Theme Thesaurus
EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs
EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs > Coral reef ecology
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef monitoring and assessment
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef monitoring and assessment > Rapid assessment studies
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef monitoring and assessment > Reef fish census
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef monitoring and assessment > Reef fish census > Stationary
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef monitoring and assessment > Reef fish census > Random swimming
EARTH SCIENCE > Biosphere > Zoology > Corals > Reef monitoring and assessment > Reef fish census > Belt transect
ISO 19115 Topic Category
biota
002
None
Marianas Archipelago
Alamagan Island
CoRIS Region
CNMI
CoRIS Place Thesaurus
OCEAN BASIN > Pacific Ocean > Western Pacific Ocean > Alamagan Island > Alamagan Island (17N145E0002)
COUNTRY/TERRITORY > Northern Mariana Islands > Alamagan Island > Alamagan Island (17N145E0002)
Data are available two years following data collection date.
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
Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
Ivor Williams
mailing and physical address
NOAA IRC
NMFS/PIFSC/CRED
1845 WASP Blvd., Building 176
Honolulu
HI
96818
USA
808 725-5360
808 725-5429
nmfs.pic.credinfo@noaa.gov
e-mail preferred
"Robert Schroeder, Marc Nadon, Paula Ayotte, Valerie Brown, Marie Ferguson", Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Sciences Center, National Marine Fisheries Service, NOAA
Not applicable
Unclassified
Not applicable
Oracle
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.
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.
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.
GPS unit
1
Instrument parameters
Dive computer and SCUBA depth gauge
0.3
Instrument parameters
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.
Unknown
0.0001
0.0001
Decimal Degrees
World Geodetic System 1984 (WGS84)
Geodetic Reference System 80 (GRS80)
6378137
298.2572236
Local surface
1
meters
Explicit Depth Coordinate Included with Horizontal Coordinates
Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
CRED Data Management Team
mailing and physical address
NOAA IRC
NMFS/PIFSC/CRED
1845 WASP Blvd., Building 176
Honolulu
HI
96818
USA
808 725-5360
808 725-5429
nmfs.pic.credinfo@noaa.gov
e-mail preferred
Offline Data
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.
XLS (Microsoft Excel worksheet)
CDROM, or email
ISO 9660
None if receiving the data online
Contact CRED data management team for information
Contact CRED data management team for information
20190526
20090914
Coral Reef Ecosystem Division (CRED), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA)
mailing and physical address
NOAA IRC
NMFS/PIFSC/CRED
1845 WASP Blvd., Building 176
Honolulu
HI
96818
USA
808 725-5360
808 725-5429
nmfs.pic.credinfo@noaa.gov
e-mail preferred
the Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
20090914034007
None
20090504
20090504
https://www.coris.noaa.gov/metadata/records/html/cred_rea_fish_alamagan_island_2009.html
2896