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Ciguatera fish poisoning and sea surface temperatures in Caribbean Sea and the West Indies

Tester PA, Feldman RL, Nau AW, Kibler SR, and Wayne Litaker R.
Created: 6/23/2016 - Updated: 1/17/2019

Abstract

Ciguatera fish poisoning (CFP) is a circumtropical disease caused by ingestion of a variety of reef fish that bioaccumulate algal toxins. Distribution and abundance of the organisms that produce these toxins, chiefly dinoflagellates of the genus Gambierdiscus, are reported to correlate positively with water temperature. Consequently, there is growing concern that increasing temperatures associated with climate change could increase the incidence of CFP. This concern prompted experiments on the growth rates of six Gambierdiscus species at temperatures between 18 degrees C and 33 degrees C and the examination of sea surface temperatures in the Caribbean and West Indies for areas that could sustain rapid Gambierdiscus growth rates year-round. The thermal optimum for five of six Gambierdiscus species tested was >/=29 degrees C. Long-term SST data from the southern Gulf of Mexico indicate the number of days with sea surface temperatures >/=29 degrees C has nearly doubled (44 to 86) in the last three decades. To determine how the sea surface temperatures and Gambierdiscus growth data correlate with CFP incidences in the Caribbean, a literature review and a uniform, region-wide survey (1996-2006) of CFP cases were conducted. The highest CFP incidence rates were in the eastern Caribbean where water temperatures are warmest and least variable.

Published On

Friday, October 1, 2010

Keywords

Scale: 
Regional / Subnational
Sector Addressed: 
Conservation / Restoration
Research
Wildlife
Target Climate Changes and Impacts: 
Species of concern
Water temperature
Type of Adaptation Action/Strategy: 
Natural Resource Management / Conservation
Habitat/Biome Type: 
Marine
Reef
Taxonomic Focus: 
Fishes

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