Marine & Environmental Sciences Faculty Articles

Importance of Mangrove Shorelines for Rainbow Parrotfish Scarus guacamaia: Habitat Suitability Modeling in a Subtropical Bay

ORCID

0000-0002-4440-8767

ResearcherID

I-5396-2012

Document Type

Article

Publication Title

Aquatic Biology

ISSN

1864-7782

Publication Date

4-24-2012

Keywords

Conservation, Logistic regression, Habitat suitability, Coral reefs, Ontogenetic shifts

Abstract

Rainbow parrotfish Scarus guacamaia is a coral-reef herbivore that requires both mangrove and coral-reef habitat to complete its life cycle. This species is listed as ‘vulnerable’ by the International Union for Conservation of Nature. The present study used a long-term visual survey of mangrove fishes to develop a predictive habitat model for juvenile S. guacamaia. The factors tested were temperature, dissolved oxygen, salinity, average depth, distance from offshore channel openings, temperature variation (ΔT), and salinity variation (ΔS). The average depth, distance from offshore channel openings, ΔT, and ΔS emerged as significant within the model evaluations. The results suggested that high variation in salinity reduces mangrove habitat suitability for this species. Salinity variation along many of south Florida’s coastal bays is largely driven by water management-related freshwater canal discharges. Everglades restoration efforts seek to reduce ΔS along south Florida’s mainland shoreline; thus, if successful, restoration may also confer benefits to Scarus guacamaia through the subsequent expansion of suitable mangrove habitat.

DOI

10.3354/ab00412

Volume

15

Issue

1

First Page

87

Last Page

98

Comments

©Inter-Research 2012

Additional Comments

Financial support for the mangrove-fish surveys was provided by RECOVER (US Army Corps of Engineers and South Florida Water Management District) and the Southeast Fisheries Science Center, National Marine Fisheries Service, NOAA.

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