Scientific nameAlexandrium minutum
SYSTEM
Marine
 
COMMON NAMES
English: red tide phytoplankton, red tide dinoflagellate
 
DESCRIPTION
Alexandrium minutum is a toxic single-celled armoured dinoflagellate that is well characterized morphologically in Balech, 1995. Cells are spherical in shape and small-sized, 15 to 29 um in diameter. The cell is green-brown in colour with a theca (clear protective covering). Small details on this theca differentiate A.minutum from other Alexandrium species. Cysts of A. minutum are from spherical to slightly flattened in shape and from circular (25–35 um diameter) when seen from above to oval (28–35 um long, 20–30 um wide) in lateral view. The most common cell content is granular material and a more or less condensed yellow–orange accumulation body. Nevertheless, globular content is also observed in some cysts (Bravo et al., 2006).
 
KNOWN INTRODUCED RANGE
ASEAN: Malaysia
WORLD: Atlantic – Northeast, Denmark, Ireland, Mediterranean and Black Sea, Portugal, Sweden, Turkey, United States, Australia, Egypt, New Zealnd, Spain, Taiwan, United Kingdom
 
PATHWAY
Transport – Ship/boat Ballast Water
 
REASON FOR INTRODUCTION
The red-tide dinoflagellate may be accidentally transferred with ballast water (Hallegraeff and Bolch 1992, NIMPIS, 2002).
 
IMPACTS
Alexandrium minutum produces toxins which are toxic to some zooplankton and fish and can reduce copepod reproduction. The toxins are bioaccumulated in zooplankton, shellfish and crabs, the consumption of which can lead to paralytic shellfish poisoning (PSP) in humans and other mammals.
 
Source: Global Invasive Species Database (GISD) 2015. Species profile Alexandrium minutum. Available from: http://www.iucngisd.org/gisd/species.php?sc=1023 [Accessed 09 September 2019]
FilenameAlexandrium minutum.pdf
Filesize17.4 kB
Filetypepdf (Mime Type: application/pdf)
Last updated on 09/12/2019 23:03