View: VS_FISH_TDS

Primary key for the fish tow data table

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.

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

Taxonomic family classification

Common name of all families

Scientific name

Common name (from FishBase)

Species observed during the fish towed diver survey

Number of fish observed for that segment

Total length of fish, measured from the tip of the snout to the tip of the longer lobe of the caudal fin, reported in centimeters. Total length for rays (Myliobatidae) is measured from pectoral fin tip to pectoral fin tip.

Parameter "a" used in length-weight calculations

Parameter "b" used in length-weight calculations

Factor to convert length as total length by to get it to right form (SL or FL or TL) for available length weight A and B parameters for this species. Weight per fish is calculated as W(g)=LW A * ((TL(cm)*Length Conversion Factor) ^{LW B})

Trophic level: APEX (apex predator), Cor (corallivore), H (herbivore), MI (mobile invertivore), Om (Omnivore), Pisc (piscivore), Pk (planktivore), SI (sessile invertivore), Z (zooplantivore)

Trophic level scheme used (Primary Consumer, Secondary Consumer, Planktivore, Piscivore).*Note: Primary Consumers are all Herbivores and Deteritivores. Piscivores are species that primarily eat other fishes. Secondary Consumers are Omnivores and Invertivores

Comment for the fish tow data