AB 15:87-98 (2012)  -  DOI: https://doi.org/10.3354/ab00412

Importance of mangrove shorelines for rainbow parrotfish Scarus guacamaia: habitat suitability modeling in a subtropical bay

Ethan G. P. Machemer1, John F. Walter III2, Joseph E. Serafy2,3, David W. Kerstetter1,*

1Nova Southeastern University Oceanographic Center, 8000 North Ocean Drive, Dania Beach, Florida 33004, USA
2NOAA-NMFS Southeast Fisheries Science Center, 75 Virginia Beach Drive, Miami, Florida 33149, USA
3University of Miami, Rosenstiel School of Marine and Atmospheric Science, 4600 Rickenbacker Causeway, Miami, Florida 33149, USA

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.


KEY WORDS: Conservation · Logistic regression · Habitat suitability · Coral reefs · Ontogenetic shifts


Full text in pdf format 
Cite this article as: Machemer EGP, Walter JF III, Serafy JE, Kerstetter DW (2012) Importance of mangrove shorelines for rainbow parrotfish Scarus guacamaia: habitat suitability modeling in a subtropical bay. Aquat Biol 15:87-98. https://doi.org/10.3354/ab00412

Export citation
Mail this link - Contents Mailing Lists - RSS
- -