The prevalence of benthic dinoflagellates associated with ciguatera fish poisoning in the central Red Sea

<p>Benthic dinoflagellates causing Ciguatera Fish Poisoning (CFP), could be found attached either on macroalgae or sea grasses. Research on density and distribution of benthic dinoflagellates on sea grass leaves was conducted in Pari Island waters, Seribu Islands, in April 2012. Research was carried out by collecting Enhalus acoroides leaves from each site, and put inside the plastic jars containing seawater. In order to separate the dinoflagellates species from the leaves, the plastic jars were shaken vigorously and the seawater filtered through a series of sieves (125μm and 20μm). The resulted residue was than observed using Sedgewick rafter cell under light microscope. Based on samples collected, eight benthic dinoflagellates were found, where five of them were potentially toxic. They were Prorocentrum concavum, P. lima, P. rhathymum, Ostreopsis lenticularis, and O. siamensis. The highest abundance was found in the reef flat on the southern side of the island (652 sel/cm2 seagrass leaf). Research showed that the density and distribution of toxic dinoflagellates on sea grass at Pari Island, Seribu Islands were more influenced by local water currents.</p><p>Keywords: benthic dinoflagellates, Ciguatera Fish Poisoning, Pari Island, seagrass</p>

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First spatial distribution of potentially toxic benthic dinoflagellates in the Lesser Antilles (Guadeloupe and Martinique), Caribbean Sea

Botanica Marina ◽

10.1515/bot-2018-0002 ◽

2019 ◽

Vol 62 (4) ◽

pp. 309-322 ◽

Cited By ~ 1

Author(s):

Aurélie Boisnoir ◽

Pierre-Yves Pascal ◽

Sophie Marro ◽

Rodolphe Lémée

Keyword(s):

Time Distribution ◽

Caribbean Sea ◽

Lesser Antilles ◽

Substrate Preferences ◽

Cell Counts ◽

Ciguatera Fish Poisoning ◽

Benthic Dinoflagellates ◽

Fish Poisoning ◽

Order Of Magnitude ◽

First Time

Abstract For the first time, distribution and abundances (cells per gram of fresh macrophyte weight) of potentially toxic benthic dinoflagellates were studied around Guadeloupe (20 sites) and Martinique (six sites) islands (Lesser Antilles, Caribbean Sea). Benthic dinoflagellates were identified at the genus level and cell counts were undertaken on different host species of macroalgae and seagrasses. Abundance values of potentially toxic benthic dinoflagellates were one order of magnitude higher in Guadeloupe than in Martinique. The highest abundances of benthic dinoflagellates were found in the northern part of Guadeloupe Island, while their distribution was more homogeneous in Martinique. Ostreopsis was the dominant genus in Guadeloupe and Martinique. Regarding biotic substrate preferences, Phaeophyceae hosted the highest total abundances of benthic dinoflagellates on both islands, while the lowest total abundances were observed on Ulvophyceae in Guadeloupe and Florideophyceae in Martinique. The genus Gambierdiscus, known as the causal agent of the ciguatera fish poisoning (CFP), developed on all macrophyte groups on both islands without showing any preferences towards biotic substrates. The presence of this potentially harmful dinoflagellate genus in both islands could explain the existence of local cases of CFP in Guadeloupe and Martinique islands.

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THE DISTRIBUTION OF TOXIC DINOFLAGELLATES ON SEA GRASS Enhalus acoroides AT PARI ISLAND, SERIBU ISLANDS

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v4i2.7788 ◽

2012 ◽

Vol 4 (2) ◽

Author(s):

Riani Widiarti ◽

Fitrian Anggraini

Keyword(s):

Light Microscope ◽

Reef Flat ◽

Enhalus Acoroides ◽

Ciguatera Fish Poisoning ◽

Benthic Dinoflagellates ◽

Fish Poisoning ◽

Sea Grass ◽

Toxic Dinoflagellates ◽

Southern Side ◽

Local Water

Benthic dinoflagellates causing Ciguatera Fish Poisoning (CFP), could be found attached either on macroalgae or sea grasses. Research on density and distribution of benthic dinoflagellates on sea grass leaves was conducted in Pari Island waters, Seribu Islands, in April 2012. Research was carried out by collecting Enhalus acoroides leaves from each site, and put inside the plastic jars containing seawater. In order to separate the dinoflagellates species from the leaves, the plastic jars were shaken vigorously and the seawater filtered through a series of sieves (125μm and 20μm). The resulted residue was than observed using Sedgewick rafter cell under light microscope. Based on samples collected, eight benthic dinoflagellates were found, where five of them were potentially toxic. They were Prorocentrum concavum, P. lima, P. rhathymum, Ostreopsis lenticularis, and O. siamensis. The highest abundance was found in the reef flat on the southern side of the island (652 sel/cm2 seagrass leaf). Research showed that the density and distribution of toxic dinoflagellates on sea grass at Pari Island, Seribu Islands were more influenced by local water currents.Keywords: benthic dinoflagellates, Ciguatera Fish Poisoning, Pari Island, seagrass

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THE POTENTIALLY TOXIC BENTHIC DINOFLAGELLATES ON MACROALGAE AT THE REEF FLAT OF SERIBU ISLANDS, NORTH JAKARTA - INDONESIA

Marine Research in Indonesia ◽

10.14203/mri.v33i1.462 ◽

2018 ◽

Vol 33 (1) ◽

pp. 91-94 ◽

Cited By ~ 1

Author(s):

Riani Widiarti ◽

Murtiningsih ◽

Suwarti ◽

Ahmad Mutaqin ◽

Gud Elina Kurnia

Keyword(s):

Coral Reef ◽

Environmental Factors ◽

Human Activities ◽

National Park ◽

Reef Flat ◽

Brown Macroalgae ◽

Ciguatera Fish Poisoning ◽

Benthic Dinoflagellates ◽

Fish Poisoning ◽

Gambierdiscus Toxicus

The Ciguatera Fish Poisoning (CFP) causing microorganisms were observed at the reef flat of Penjaliran Barat Islands and Pramuka Islands District, Seribu Island National Park, North Jakarta, Indonesia. Of the samples collected, four potentially toxic benthic dinoflagellates species were found, which are Gambierdiscus toxicus, Prorocentrum concavum, Prorocentrum lima, and Ostreopsis lenticularis. The dinoflagellates were found attached on the brown macroalgae Padina and Sargassum. Most of the benthic dinoflagellates from both locations were found in Pramuka Islands District, the inhabitated islands where human activities which could damage the coral reef areas were relatively high. Beside the macroalgae substrate preference of each dinoflagellate species, several environmental factors were also obtained in this research.

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