Parrotfish Foraging Behavior and Diet in St. Croix Reefs

NOAA_NCEI documented the foraging behavior and diets of six parrotfish species at three locations on St. Croix's north shore. Observations tracked fish movement via GPS and recorded food items and substrate types. The dataset includes photoquadrat analysis of algal and coral cover on common foraging substrates.

Use Cases

• Analyzing species-specific foraging rates and substrate preferences (e.g., dead coral vs. sand).
• Mapping grazing pressure on different benthic substrates using GPS-tracked movement data.
• Correlating parrotfish diet composition (macroalgae, coral genus/species) with local benthic cover estimates.
• Studying the functional impact of parrotfish species (Scarus, Sparisoma) on algal community structure.

Strengths

• Behavioral data is geospatially referenced with GPS position fixes recorded at 15-second intervals.
• Diet and substrate data are taxonomically detailed, with food items identified to genus or species level where possible.
• Benthic cover is quantified from a systematic sampling of 10 transects per site with photoquadrats taken at 2.5m intervals.

Limitations

• Specific column names, row counts, and total dataset size are not provided by any source.
• Sources conflict on the last updated date, reporting both 2015-07-26 and 2026-04-01.
• The multi-species nature of algal turf makes identifying specific algae targeted in a single bite impossible.

Provenance

Source

NOAA_NCEI

Collection Method

SCUBA diver observations with towed GPS receiver, followed by photoquadrat sampling along transects.

Time Range

2015-07-06 to 2015-07-26

Freshness

2026-04-01 15:32:55.467257

Geography

Three locations (Long Reef, Cane Bay, Buck Island) on the north shore of St. Croix, U.S. Virgin Islands.