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Title 

Life cycle of the ichthyotoxic dinoflagellate Cochlodinium polykrikoides in Korean coastal waters

 

한국 연안수역에서 어독성의 와편모조류 Cochlodinium polykrikoides의 생활사

Authors 

Choong-Jae KimH G KimC H KimHee-Mock Oh

Publisher 

Elsevier

Issue Date 

2007

Citation 

Harmful Algae, vol. 6, no. 1, pp. 104-111

Keywords 

armored typecochlodinium polykrikoidesresting cystunarmored type

Abstract 

Since 1995, blooms of the harmful dinoflagellate, Cochlodinium polykrikoides, have caused considerable mortality of aquatic organisms and economic loss in Korea. However, little is known about the life cycle of the species, except for the planktonic vegetative stage; therefore, the aim of this paper was to elucidate the life cycle of C. polykrikoides. Its life cycle has two morphologically different stages: an armored and an unarmored vegetative stage. Armored vegetative cells were found in seawater samples collected in late-November and developed into four-cell chained, unarmored vegetative cells under laboratory culture. In samples collected in late-May, both the armored and unarmored types (vegetative swimming stage) occurred; the former easily developed into an unarmored vegetative cell type, suggesting that the armoured-unarmored transition occurs as early as May. A presumptive resting cyst, round but folded at one side, was produced from armored type cells in laboratory conditions. It was also collected from natural bottom sediments, which suggests it is the dormant resting cyst of C. polykrikoides.

ISSN 

1568-9883

Link 

http://dx.doi.org/10.1016/j.hal.2006.07.004

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2017-04-19


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