View: VS_BENT_TDS

Unique Identifier for ROUND record

Mission Identifier

One of the five Pacific Island regions CRED surveys

Foreign key reference to the LIST_OF_ISLANDS table for the given ISLANDVISIT record

Latitude in decimal degrees, WGS84, for the given island

Longitude in decimal degrees, WGS84 for the given island

Year the survey was conducted

Unique ID representing year, month, day, tow # of day

Unique ID representing year, month, day, tow # of day, segment #

Date of the Tow survey

The reef zone for the given towed diver segment (Forereef, Backreef, Lagoon, unspecified). Forereef: The sloping bottom underlying the wave break zone, extending seaward from the reef crest. Comprehensive surveys of forereef habitats remain the priority for towed-diver operations. Backreef: The shallow strip of reef sheltered from breaking waves by the reef crest, situated between the reef crest and the lagoon floor. Lagoon: The zone sheltered from the waves by the reef crest, and separated from the reef crest by the back reef. Usually deeper than the back reef and covered in unconsolidated sediment, this term describes both an atoll's interior and the expanse situated between the back reef and shore of any islands present. Unspecified: these are other areas surveyed using towed-diver methods, which include: Bank: A submerged platform reef, often occurring either as an isolated feature atop a seamount or as a plateau situated between the fore reef and a deeper slope. These areas are no longer actively targeted, with Pathfinder Reef (MARAMP 2007, CNMI) and Tutuila (ASRAMP 2010; exploratory) represents the last banks actively surveyed. Channel: A submerged transition between forereef and backreef zones created by a gap in the reef crest. Divers should avoid using channels to transition from forereef to backreef habitats (i.e. stick with one or the other). In addition, divers should make a note in the ¿Comments¿ section whenever crossing a channel along a forereef/backreef survey.

Survey method used

No data recorded for a towed-diver survey due to diver recall, hazardous conditions, depth, etc.

Initials of fish diver

Initials of benthic diver

Towkey for the given towed diver survey fish observation

Segments represent 5-minute increments; there are 10 segments per tow.

Mean Depth (in meters) of the towed-diver segment

Standard deviation of depth of the towed-diver segment

Temperature of the Towed Diver Survey

Standard deviation of temperature of the Towed Diver Survey

Local start time of the Towed Diver Survey

Local end time of the Towed Diver Survey

Latitude in decimal degrees, WGS84, for the center point of each 5-minute towed-diver survey segment

Longitude in decimal degrees, WGS84, for the center point of each 5-minute towed-diver survey segment

Length of tow segment (meters). Calculated from tow tracks using GIS

Dominant Habitat

Dominant Habitat description

Complexity

Live coral mid-point

Soft coral mid-point

Sand mid-point

Stressed coral mid-point

Macro algae mid-point

Coralline algae mid-point

Acanthaster planci. Macroinvertebrates are counted independently up to 25 individuals. Above that, numbers of each macroinvertebrate taxa are binned as follows: Category 1: 26 - 50 (1 with a circle around it; same for subsequent categories). Category 2: 51 - 100. Category 3: 101 - 250. Category 4: 251 - 500. Category 5: 501 - 1000. Category 6: > 1000

"Boring" sea urchins (e.g. Echinostrephus, Echinometra). Macroinvertebrates are counted independently up to 25 individuals. Above that, numbers of each macroinvertebrate taxa are binned as follows: Category 1: 26 - 50 (1 with a circle around it; same for subsequent categories). Category 2: 51 - 100. Category 3: 101 - 250. Category 4: 251 - 500. Category 5: 501 - 1000. Category 6: > 1000

"Free" sea urchins (e.g. Tripneustes, Diadema). Macroinvertebrates are counted independently up to 25 individuals. Above that, numbers of each macroinvertebrate taxa are binned as follows: Category 1: 26 - 50 (1 with a circle around it; same for subsequent categories). Category 2: 51 - 100. Category 3: 101 - 250. Category 4: 251 - 500. Category 5: 501 - 1000. Category 6: > 1000

Giant clams (Tridacna sp.). Macroinvertebrates are counted independently up to 25 individuals. Above that, numbers of each macroinvertebrate taxa are binned as follows: Category 1: 26 - 50 (1 with a circle around it; same for subsequent categories). Category 2: 51 - 100. Category 3: 101 - 250. Category 4: 251 - 500. Category 5: 501 - 1000. Category 6: > 1000

Derelict fishing gear of any type (e.g. monofilament line, fishing nets or fragments of fishing nets, etc.)

Munitions/unexploded ordinance

Shipwrecks

Man-made objects, whether of nautical or terrestrial origins (e.g. anchors/discarded mooring, tires, corrugated tin roofing). It is important to note that marine debris observations do not include highly mobile marine debris (e.g. bottles, cans, plastic bags, etc.)

Manmade Note