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Saudi J Biol Sci
2021 Nov 01;2811:6116-6126. doi: 10.1016/j.sjbs.2021.10.001.
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Sea cucumbers of the Arabian Peninsula and Iran - A review of historical and current research trends.
Al-Yaqout A
,
Nithyanandan M
,
Al-Yamani F
,
Al-Kandari M
,
Al-Roumi M
,
Al-Baz A
.
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Sea cucumbers are benthic marine invertebrates with immense ecological and commercial value. Processed sea cucumbers known as "Beche-de-mer" are a delicacy in southeast Asian countries with an ever-increasing demand depleting wild stocks on a global scale. Aquaculture techniques are well developed for commercially important species (e.g. Holothuria scabra) to aid in conservation and trade. In the Arabian Peninsula and Iran, where the major land mass is surrounded by marginal seas (Arabian Gulf, Gulf of Oman, Arabian Sea, Gulf of Aden, and Red Sea), studies on sea cucumbers are rather limited and its economic value is underestimated. Historical and current research trends indicate impoverished diversity (82 species) due to environmental extremes. Artisanal fisheries exist for the sea cucumbers of Iran, Oman, and Saudi Arabia, with Yemen and United Arab Emirates (UAE) playing a key role in collection and export to Asian countries. Stock assessment and data on export indicates depletion of natural stocks in Saudi Arabia and Oman. Aquaculture trials of high value species (H. scabra) were successful in Saudi Arabia, Oman and Iran with prospects for further expansion. Research on ecotoxicological properties and bioactive substances conducted in Iran demonstrates an immense research potential. Molecular phylogeny, biology, use in bioremediation, and characterisation of bioactive compounds were identified as potential gaps in research. Expanding aquaculture operations could revive exports and recuperate damaged stocks through sea ranching. Furthermore, regional cooperation, networking, training, and capacity building could help fill the gaps in sea cucumber research, which will aid in its effective conservation and management.
Fig. 1. Map of AP and Iran showing the sporadic distribution of sea cucumber species.
Fig. 2. Species richness of sea cucumbers occurring in the marginal seas of the AP and Iran.
Fig. 3. Annual export of dried sea cucumbers (in tonnes) from the AP countries to Asian markets during 1996–2014 (data compiled from Purcell et al., 2013, Muthiga and Conand, 2013, Conand, 2018).
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