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   set  data   graph     files  public Censuses of the native prey fish populations during lionfish surveys in Eleuthera, Bahamas
from July to August in 2012
   ?     I   M   background (external link) RSS BCO-DMO bcodmo_dataset_653816

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL access_formats String .htmlTable,.csv,.json,.mat,.nc,.tsv
attribute NC_GLOBAL acquisition_description String This was an observational field study conducted from June - August 2012 to
determine whether lionfish behavior and movements change at different local
lionfish and prey fish densities. \u00a0The study was conducted on sixteen
reefs in Rock Sound, Elethera, The Bahamas.\u00a0 All reefs were at least 300
m from any reef on which lionfish removals had occurred, and were selected to
encompass a range of natural lionfish densities and reef sizes. \u00a0

A pair of divers visited each reef at three times of day: within 2 hours of
sunrise (\u2018dawn\u2019), greater than 3 hours from sunrise or sunset
(\u2018midday\u2019), and within 2 hours of sunset (\u2018dusk\u2019).\u00a0
Upon arriving at a reef, observers counted the number of lionfish present by
conducting lionfish-focused searches.\u00a0 For each lionfish, observers
recorded the size (total length, visually estimated to the nearest cm),
behavior, and location the moment it was sighted.\u00a0 Behaviors were
categorized as resting (sitting on the substrate, not moving), hovering (in
the water column oriented parallel to the bottom, but not moving), swimming
(actively moving), or hunting (oriented head down with pectoral fins
flared).\u00a0 Location was categorized as the microhabitat on which lionfish
were observed (e.g. under a ledge, on top of the reef, in the surrounding
seagrass) and later divided into two major categories: sheltering (hidden
under structure) or exposed (on top of reef or in surrounding area).\u00a0
Then, 10-minute focal observations were conducted on two randomly-selected
lionfish or a single lionfish when there was only one individual present per
reef.\u00a0 During focal observations, a trained observer recorded the
behavior of lionfish at 30-second intervals for 10 minutes using the same
categories as above.\u00a0 The observers also noted any strikes at prey,
successful kills, and obviously aggressive interactions (chases, posturing)
between lionfish or between lionfish and other species.\u00a0 Throughout the
entire visit to each reef, divers noted the time when any lionfish departed
from or arrived at the reef and its behavior.\u00a0 A lionfish was defined as
departing from the reef if it traveled at least 10 m from the reef.\u00a0 A
lionfish was considered arriving at a reef if it swam in from the surrounding
areas and had not been previously observed at that reef during that
observation period.\u00a0 At the conclusion of the focal observations, the
divers re-counted the number of lionfish present while conducting a survey of
resident native fishes.\u00a0 Divers recorded the abundance and body size (TL)
of all fish 1 - 15 cm TL, native mesopredators that are ecologically similar
to lionfish (e.g. Cephalopholis cruentata [graysby grouper]), and top
predators (e.g. Epinephelus striatus [Nassau grouper]) on and within 1 m of
the reef.
attribute NC_GLOBAL awards_0_award_nid String 561016
attribute NC_GLOBAL awards_0_award_number String OCE-1233027
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1233027 (external link)
attribute NC_GLOBAL awards_0_funder_name String NSF Division of Ocean Sciences
attribute NC_GLOBAL awards_0_funding_acronym String NSF OCE
attribute NC_GLOBAL awards_0_funding_source_nid String 355
attribute NC_GLOBAL awards_0_program_manager String Dr David L. Garrison
attribute NC_GLOBAL awards_0_program_manager_nid String 50534
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String Behavior and Movement - Native Fish Survey
Lead PI: Mark Hixon
Sub-Project Lead: Casey Benkwitt
Version 10 August 2016
Species codes are first two letters of genus and species; See species key.
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String info at bco-dmo.org
attribute NC_GLOBAL creator_name String BCO-DMO
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String https://www.bco-dmo.org/ (external link)
attribute NC_GLOBAL data_source String extract_data_as_tsv version 2.2d 13 Jun 2019
attribute NC_GLOBAL date_created String 2016-08-11T18:27:30Z
attribute NC_GLOBAL date_modified String 2019-05-22T18:19:28Z
attribute NC_GLOBAL defaultDataQuery String &time
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.653816.1
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/653816 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL keywords String bco, bco-dmo, biological, chemical, data, dataset, day, dmo, end, erddap, length, length_max_1, length_max_10, length_max_100, length_max_15, length_max_150, length_max_2, length_max_20, length_max_25, length_max_3, length_max_30, length_max_35, length_max_4, length_max_40, length_max_45, length_max_5, length_max_50, length_max_6, length_max_7, length_max_8, length_max_9, management, max, month, oceanography, office, period, preliminary, reef, species, start, taxonomy, time, time_end, time_period, time_start, year
attribute NC_GLOBAL license String The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/653816 (external link)
attribute NC_GLOBAL param_mapping String {'653816': {}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/653816/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String University of Hawaii
attribute NC_GLOBAL people_0_person_name String Dr Mark Hixon
attribute NC_GLOBAL people_0_person_nid String 51647
attribute NC_GLOBAL people_0_role String Principal Investigator
attribute NC_GLOBAL people_0_role_type String originator
attribute NC_GLOBAL people_1_affiliation String Oregon State University
attribute NC_GLOBAL people_1_affiliation_acronym String OSU
attribute NC_GLOBAL people_1_person_name String Dr Cassandra E Benkwitt
attribute NC_GLOBAL people_1_person_nid String 51706
attribute NC_GLOBAL people_1_role String Contact
attribute NC_GLOBAL people_1_role_type String related
attribute NC_GLOBAL people_2_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_2_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_2_person_name String Hannah Ake
attribute NC_GLOBAL people_2_person_nid String 650173
attribute NC_GLOBAL people_2_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_2_role_type String related
attribute NC_GLOBAL project String Mechanisms and Consequences of Fish Biodiversity Loss on Atlantic Coral Reefs Caused by Invasive Pacific Lionfish
attribute NC_GLOBAL projects_0_acronym String BiodiversityLossEffects_lionfish
attribute NC_GLOBAL projects_0_description String The Pacific red lionfish (Pterois volitans), a popular aquarium fish, was introduced to the Atlantic Ocean in the vicinity of Florida in the late 20th century. Voraciously consuming small native coral-reef fishes, including the juveniles of fisheries and ecologically important species, the invader has undergone a population explosion that now ranges from the U.S. southeastern seaboard to the Gulf of Mexico and across the greater Caribbean region. The PI's past research determined that invasive lionfish (1) have escaped their natural enemies in the Pacific (lionfish are much less abundant in their native range); (2) are not yet controlled by Atlantic predators, competitors, or parasites; (3) have strong negative effects on populations of native Atlantic fishes; and (4) locally reduce the diversity (number of species) of native fishes. The lionfish invasion has been recognized as one of the major conservation threats worldwide.
The Bahamas support the highest abundances of invasive lionfish globally. This system thus provides an unprecedented opportunity to understand the direct and indirect effects of a major invader on a diverse community, as well as the underlying causative mechanisms. The PI will focus on five related questions: (1) How does long-term predation by lionfish alter the structure of native reef-fish communities? (2) How does lionfish predation destabilize native prey population dynamics, possibly causing local extinctions? (3) Is there a lionfish-herbivore-seaweed trophic cascade on invaded reefs? (4) How do lionfish modify cleaning mutualisms on invaded reefs? (5) Are lionfish reaching densities where natural population limits are evident?�
attribute NC_GLOBAL projects_0_end_date String 2016-07
attribute NC_GLOBAL projects_0_geolocation String Three Bahamian sites: 24.8318, -076.3299; 23.8562, -076.2250; 23.7727, -076.1071; Caribbean Netherlands: 12.1599, -068.2820
attribute NC_GLOBAL projects_0_name String Mechanisms and Consequences of Fish Biodiversity Loss on Atlantic Coral Reefs Caused by Invasive Pacific Lionfish
attribute NC_GLOBAL projects_0_project_nid String 561017
attribute NC_GLOBAL projects_0_project_website String http://hixon.science.oregonstate.edu/content/highlight-lionfish-invasion (external link)
attribute NC_GLOBAL projects_0_start_date String 2012-08
attribute NC_GLOBAL publisher_name String Hannah Ake
attribute NC_GLOBAL publisher_role String BCO-DMO Data Manager(s)
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v29
attribute NC_GLOBAL subsetVariables String year, length_max_45, length_max_50, length_max_100, length_max_150
attribute NC_GLOBAL summary String Censuses of the native prey fish populations during lionfish surveys in Eleuthera, Bahamas from July to August in 2012
attribute NC_GLOBAL title String Censuses of the native prey fish populations during lionfish surveys in Eleuthera, Bahamas from July to August in 2012
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.5-beta
variable year   short  
attribute year _FillValue short 32767
attribute year actual_range short 2012, 2012
attribute year description String Year of survey; yyyy
attribute year ioos_category String Time
attribute year long_name String Year
attribute year units String unitless
variable time_period   String  
attribute time_period description String Time of observation; classified as either dawn midday or dusk
attribute time_period ioos_category String Time
attribute time_period long_name String Time Period
attribute time_period units String unitless
variable month   byte  
attribute month _FillValue byte 127
attribute month actual_range byte 7, 8
attribute month description String Month of survey; mm
attribute month ioos_category String Time
attribute month long_name String Month
attribute month units String unitless
variable day   byte  
attribute day _FillValue byte 127
attribute day actual_range byte 1, 31
attribute day description String Day of the month survey took place; dd
attribute day ioos_category String Time
attribute day long_name String Day
attribute day units String unitless
variable time_start   String  
attribute time_start description String Time that the census began; HH:MM
attribute time_start ioos_category String Time
attribute time_start long_name String Time Start
attribute time_start units String unitless
variable time_end   String  
attribute time_end description String Time that the census ended; HH:MM
attribute time_end ioos_category String Time
attribute time_end long_name String Time End
attribute time_end units String unitless
variable reef   String  
attribute reef description String Name of main reef where survey took place
attribute reef ioos_category String Unknown
attribute reef long_name String Reef
attribute reef units String unitless
variable species   String  
attribute species description String First 2 letters of genus and first 2 letters of species (with the exception of UNJA = unidentified jawfish; SHIRMP = mysid shrimp; UNID = unidentified)
attribute species ioos_category String Taxonomy
attribute species long_name String Species
attribute species units String unitless
variable length_max_1   byte  
attribute length_max_1 _FillValue byte 127
attribute length_max_1 actual_range byte 0, 11
attribute length_max_1 description String Number of individuals that were between 0-1 cm total length
attribute length_max_1 ioos_category String Unknown
attribute length_max_1 long_name String Length Max 1
attribute length_max_1 units String count
variable length_max_2   byte  
attribute length_max_2 _FillValue byte 127
attribute length_max_2 actual_range byte 0, 50
attribute length_max_2 description String Number of individuals that were between 1.1-2 cm total length
attribute length_max_2 ioos_category String Unknown
attribute length_max_2 long_name String Length Max 2
attribute length_max_2 units String count
variable length_max_3   byte  
attribute length_max_3 _FillValue byte 127
attribute length_max_3 actual_range byte 0, 75
attribute length_max_3 description String Number of individuals that were between 2.1-3 cm total length
attribute length_max_3 ioos_category String Unknown
attribute length_max_3 long_name String Length Max 3
attribute length_max_3 units String count
variable length_max_4   byte  
attribute length_max_4 _FillValue byte 127
attribute length_max_4 actual_range byte 0, 75
attribute length_max_4 description String Number of individuals that were between 3.1-4 cm total length
attribute length_max_4 ioos_category String Unknown
attribute length_max_4 long_name String Length Max 4
attribute length_max_4 units String count
variable length_max_5   byte  
attribute length_max_5 _FillValue byte 127
attribute length_max_5 actual_range byte 0, 81
attribute length_max_5 description String Number of individuals that were between 4.1-5 cm total length
attribute length_max_5 ioos_category String Unknown
attribute length_max_5 long_name String Length Max 5
attribute length_max_5 units String count
variable length_max_6   byte  
attribute length_max_6 _FillValue byte 127
attribute length_max_6 actual_range byte 0, 80
attribute length_max_6 description String Number of individuals that were between 5.1-6 cm total length
attribute length_max_6 ioos_category String Unknown
attribute length_max_6 long_name String Length Max 6
attribute length_max_6 units String count
variable length_max_7   byte  
attribute length_max_7 _FillValue byte 127
attribute length_max_7 actual_range byte 0, 9
attribute length_max_7 description String Number of individuals that were between 6.1-7 cm total length
attribute length_max_7 ioos_category String Unknown
attribute length_max_7 long_name String Length Max 7
attribute length_max_7 units String count
variable length_max_8   byte  
attribute length_max_8 _FillValue byte 127
attribute length_max_8 actual_range byte 0, 5
attribute length_max_8 description String Number of individuals that were between 7.1-8 cm total length
attribute length_max_8 ioos_category String Unknown
attribute length_max_8 long_name String Length Max 8
attribute length_max_8 units String count
variable length_max_9   byte  
attribute length_max_9 _FillValue byte 127
attribute length_max_9 actual_range byte 0, 14
attribute length_max_9 description String Number of individuals that were between 8.1-9 cm total length
attribute length_max_9 ioos_category String Unknown
attribute length_max_9 long_name String Length Max 9
attribute length_max_9 units String count
variable length_max_10   byte  
attribute length_max_10 _FillValue byte 127
attribute length_max_10 actual_range byte 0, 5
attribute length_max_10 description String Number of individuals that were between 9.1-10 cm total length
attribute length_max_10 ioos_category String Unknown
attribute length_max_10 long_name String Length Max 10
attribute length_max_10 units String count
variable length_max_15   byte  
attribute length_max_15 _FillValue byte 127
attribute length_max_15 actual_range byte 0, 1
attribute length_max_15 description String Number of individuals that were between 10.1-15 cm total length
attribute length_max_15 ioos_category String Unknown
attribute length_max_15 long_name String Length Max 15
attribute length_max_15 units String count
variable length_max_20   byte  
attribute length_max_20 _FillValue byte 127
attribute length_max_20 actual_range byte 0, 3
attribute length_max_20 description String Number of individuals that were between 15.1-20 cm total length
attribute length_max_20 ioos_category String Unknown
attribute length_max_20 long_name String Length Max 20
attribute length_max_20 units String count
variable length_max_25   byte  
attribute length_max_25 _FillValue byte 127
attribute length_max_25 actual_range byte 0, 2
attribute length_max_25 description String Number of individuals that were between 20.1-25 cm total length
attribute length_max_25 ioos_category String Unknown
attribute length_max_25 long_name String Length Max 25
attribute length_max_25 units String count
variable length_max_30   byte  
attribute length_max_30 _FillValue byte 127
attribute length_max_30 actual_range byte 0, 2
attribute length_max_30 description String Number of individuals that were between 25.1-30 cm total length
attribute length_max_30 ioos_category String Unknown
attribute length_max_30 long_name String Length Max 30
attribute length_max_30 units String count
variable length_max_35   byte  
attribute length_max_35 _FillValue byte 127
attribute length_max_35 actual_range byte 0, 1
attribute length_max_35 description String Number of individuals that were between 30.1-35 cm total length
attribute length_max_35 ioos_category String Unknown
attribute length_max_35 long_name String Length Max 35
attribute length_max_35 units String count
variable length_max_40   byte  
attribute length_max_40 _FillValue byte 127
attribute length_max_40 actual_range byte 0, 1
attribute length_max_40 description String Number of individuals that were between 35.1-40 cm total length
attribute length_max_40 ioos_category String Unknown
attribute length_max_40 long_name String Length Max 40
attribute length_max_40 units String count
variable length_max_45   byte  
attribute length_max_45 _FillValue byte 127
attribute length_max_45 actual_range byte 0, 0
attribute length_max_45 description String Number of individuals that were between 40.1-45 cm total length
attribute length_max_45 ioos_category String Unknown
attribute length_max_45 long_name String Length Max 45
attribute length_max_45 units String count
variable length_max_50   byte  
attribute length_max_50 _FillValue byte 127
attribute length_max_50 actual_range byte 0, 0
attribute length_max_50 description String Number of individuals that were between 45.1-50 cm total length
attribute length_max_50 ioos_category String Unknown
attribute length_max_50 long_name String Length Max 50
attribute length_max_50 units String count
variable length_max_100   byte  
attribute length_max_100 _FillValue byte 127
attribute length_max_100 actual_range byte 0, 0
attribute length_max_100 description String Number of individuals that were between 50.1-100 cm total length
attribute length_max_100 ioos_category String Unknown
attribute length_max_100 long_name String Length Max 100
attribute length_max_100 units String count
variable length_max_150   byte  
attribute length_max_150 _FillValue byte 127
attribute length_max_150 actual_range byte 0, 0
attribute length_max_150 description String Number of individuals that were between 100.1-150 cm total length
attribute length_max_150 ioos_category String Unknown
attribute length_max_150 long_name String Length Max 150
attribute length_max_150 units String count

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.


 
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