Density and height of Sargassum influence rabbitfish (f. Siganidae) settlement on inshore reef flats of the Great Barrier Reef

Tang, S., Graba-Landry, A., and Hoey, A.S. (2020) Density and height of Sargassum influence rabbitfish (f. Siganidae) settlement on inshore reef flats of the Great Barrier Reef. Coral Reefs, 39. pp. 467-473.

[img] PDF (Published Version) - Published Version
Restricted to Repository staff only

View at Publisher Website: https://doi.org/10.1007/s00338-020-01908...
4


Abstract

Macroalgal beds have been suggested to be an important settlement habitat for a diversity of reef fishes, yet few studies have considered how the composition or structure of macroalgal beds may influence fish settlement. The aim of this study was to investigate how the physical characteristics of Sargassum beds, a common macroalga on inshore coral reefs, influence the abundance of recently-settled rabbitfishes (Siganidae) on Orpheus Island, Great Barrier Reef. The abundance of recently-settled rabbitfish (< 3 cm total length), the density and height of Sargassum thalli, and benthic composition were quantified within replicate 1-m(2) quadrats across 15 mid-reef flat sites. A total of 419 recently-settled rabbitfish from three species (Siganus doliatus, S. lineatus and S. canaliculatus) were recorded across 150 quadrats (range 0-16 individuals m(-2)), with S. doliatus accounting for the majority (85.2%) of individuals recorded. The abundance of S. doliatus and S. lineatus was greatest at moderate Sargassum densities (ca. 20-30 holdfasts m(-2)) and generally increased with Sargassum height and the cover of 'other' macroalgae. These findings demonstrate the potential importance of the physical characteristics of macroalgal beds to the settlement of rabbitfishes on inshore reef flats.

Item ID: 62634
Item Type: Article (Research - C1)
ISSN: 1432-0975
Keywords: Macroalgae, Herbivory, Structural complexity, Macroalgal canopy, Settlement, Coral reef
Copyright Information: (C) Springer-Verlag GmbH Germany, part of Springer Nature 2020
Funders: ARC Centre of Excellence for Coral Reef Studies
Date Deposited: 25 Mar 2020 07:42
FoR Codes: 31 BIOLOGICAL SCIENCES > 3103 Ecology > 310305 Marine and estuarine ecology (incl. marine ichthyology) @ 100%
SEO Codes: 18 ENVIRONMENTAL MANAGEMENT > 1802 Coastal and estuarine systems and management > 180203 Coastal or estuarine biodiversity @ 100%
More Statistics

Actions (Repository Staff Only)

Item Control Page Item Control Page