Development of the Ectoparasite ‘Dissodinium Pseudocalani’ (Dinophyceae)

Synopsis: The peridinian ‘Dissodinium pseudocalani’ feeds holozoically upon the eggs of the copepod ‘Pseudocalanus elongatus’ of which it is an ectoparasite. The parasitic stage is followed by vegetative multiplication (sporogenesis). The bladder-like swollen peridinian develops into a primary cyst and the protoplast divides into 4, 8, 16, or 32 cells, resulting in secondary cysts. Dissolving the cyst membranes, the dinospores become free and are again capable of infecting eggs. Simultaneously, during sporogenesis, the food clump shrinks to a tiny reddish body.
Language: English
Country: Germany
Medium: Film; Film. 16mm. sd. b&w. 11 min.
Technical information: Black-and-white / Sound
Year of production: 1970
Availability: Hire
Uses: Second year and final courses in botany, marine biology, zoology and parasitism.*
Subjects: Biology
Keywords: parasitic plants; spore plants

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