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Digestive Apparatus and Food of the Korean Bitterling, Acheilognathus signifer (Cyprinidae)  

Baek, Hyun-Min (Division of Life Sciences, College of Natural Science, Kangwon National University)
Song, Ho-Bok (Division of Life Sciences, College of Natural Science, Kangwon National University)
Publication Information
Korean Journal of Ichthyology / v.17, no.1, 2005 , pp. 57-63 More about this Journal
Abstract
The digestive apparatus and food of the Korean bitterling, Acheilognathus signifer, from the upper reaches of the Hongcheon River were investigated by examining their gill rakers, pharyngeal teeth, and digestive-tube contents. Gill rakers of the first arch were relatively few (17 to 21, mean = 19) and short (mean = 0.36 mm, SD = 0.035). The 2nd to 5th pharyngeal teeth were well developed, while the first tooth was poorly developed. Gill rakers and pharyngeal teeth were completely formed early in life. The digestive tube was long and arranged in many coils. The digestive-tube contents of Korean bitterling mainly consisted of phytoplankton and detrital microorganisms.
Keywords
Acheilognathus signifer; pharyngeal teeth; gill raker; feeding organisms;
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