• Animal Systematics, Evolution and Diversity
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• v.21 no.1
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• pp.93-110
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• 2005

A taxonomic study on the genus Mesocyclops has been accomplished as one of the serial researches on the freshwater cyclopoid cope pods in South Korea. As a result, five species are recognized: M. leuckarti (Claus), M. pehpeiensis Hu, M. dissimilis Defaye and Kawabata, M. woutersi Van de Verde, and M. mariae Guo. Of these, M. dissimilis, M. woutersi, and M. mariae are new to Korean fauna. Morphological details of each species and the intraspecific variabilities are commented. A key to the species of genus Mesocyclops known from Korea is provided.

• The Korean Journal of Zoology
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• v.21 no.2
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• pp.67-75
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• 1978

The auther investigated the distribution and seasonal variations of Copepods and Branchiopods in Myeongam Lake located in Cheongju City, Chungchungbuk Do. Air and Water temperature, pH, and the amount of dissolved oxygen were also measured eleven times from July 29 to November 5, 1977. The results obtained are as follows: 1. The mean values of air and water temperature, pH, and dissolved oxygen during the investigation period were $25^{\circ}C , $23.7^{\circ}C, 6.86, and 10.75 ppm, respectively. 2. The total number of species collected in this lake were 13 species (1) thermocyclops taihokuensis (Harada) (2) Thermocyclops hyalinus (Rehberg) (3) Mesocyclops leuckarti (Claus) (4) Diacyclops disjunctus (Thallwitz) (5) Paracyclops fimbriatus (Fischer) (6) Cyclops sp. a (7) Cyclops sp. b (8) Diaphanosoma brachyurum (Lievin) (9) Daphnia pulex Leydig (10) Daphnia longispina (O. F. Muller) (11) Daphnia sp. (12) Moina dubia De Guerne et Richard (13) Chydorus sphaericus (O. F. Muller) 3. Among these species, 4 species (1, 3, 8, 10) were collected continually throughout the investigation period. 4. The dominant species was Diaphanosoma brachyurum during the investigation period.

• Parasites, Hosts and Diseases
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• v.28 no.3
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• pp.161-174
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• 1990

The complete life cycle of Spirometra erinacei has been experimentally maintained in the laboratory. The cyclops were reared as the first intermediate host, and the tadpoles of Rana nigromaculata as the second intermediate host. ICR mice were used as another second host. The experimental definitive hosts were dogs and cats. Maturation and hatching of the eggs took 8 to 14 days by incubation at 29℃. The coracidium measured 43.8×36.9㎛. Mesocyclops leuckarti and Eucyclops serrulatus were susceptible to the coracidial infection. The procercoids older than 5 days in the cyclops had minute spines at the anterior end, calcium corpuscles in the body parenchyme and the cercomer at the posterior end. Procercoids 10 to 20 days old were infective to tadpoles, and 15 or 21 day old worms could infect the mice. The plerocercoids from the tadpoles at 15 days after experimental infection were pear-shaped and shorter than 1 mm in the length and were infective to mice. Fifteen to 18 days after experiMental inoculation of plerocercoids to dogs or cats, the adult worms began to produce eggs. One life cycle from egg to egg needed 48 to 67 days in the laboratory. The morphology of larval or adult worms was compatible with the description of Spirometra erinacei.