A low number of introduced marine species in the tropics: A case study from Singapore

Non-indigenous marine species (NIMS) are being transported around the world by anthropogenic mechanisms, particularly by vessels in ballast water or as biofouling. A small subset of NIMS become invasive marine species (IMS) and can cause considerable damage to local marine ecosystems. Understanding where NIMS originate, how they are transported, and their effects in the new environments are crucial to the management of IMS. As one of the busiest ports in the world that handles tens of thousands of high invasion-risk vessels annually, Singapore is regarded as being at very high risk for the introduction of NIMS and IMS. However, a compilation of 3,650 marine invertebrates, fishes and plants revealed that only 22 species have been confirmed as NIMS. The results are consistent with a growing dataset that suggests biodiverse marine ecosystems in the tropical Indo-West Pacific are less susceptible to introductions than previously thought

A new species of Esanthelphusa (Crustacea: Brachyura: Parathelphusidae) from Laos, and a redescription of Potamon (Parathelphusa) dugasti Rathbun, 1902

Raffles Bulletin of Zoology521219-22

Nomenclatural notes on Hainanpotamon dai, 1995 (Brachyura, Potamidae), Orientalia dang, 1975 (Brachyura, Potamidae) and Orientalia radoman, 1972 (Mollusca, Gastropoda, Prosobranchia, Hydrobidae)

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The alpheid shrimp genus Potamalpheops powell, 1979, (Crustacea: Decapoda: Caridea: alpheidae) from Southeast Asia, with descriptions of three new species

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Erebusa calobates, new genus, new species, a troglobitic crab (Brachyura: Potamidae) from Laos

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Two new species of Parathelphusa H. Milne Edwards, 1853, from the Philippines (Crustacea: Decapoda: Brachyura: Parathelphusidae)

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Feral populations of the Australian Red-Claw crayfish (Cherax quadricarinatus von Martens) in water supply catchments of Singapore

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