title: Digestive Physiological Characteristics of the Gobiidae: - Characteristics of CCK-producing Cells and Mucus-secreting Goblet Cells of Stomach Fish and Stomachless Fish.
abstract: In this study, we investigated the characteristics of CCK-producing cells and mucus-secreting goblet cells with respect to stomach fish and stomachless fish of the Gobiidae in order to provide a basis for understanding the digestive physiology. Hairychin goby (Sagamia geneionema), which is stomachless fish, the numbers of mucus-secreting goblet cells is highest in the posterior intestine portion (P<0.05), while CCK-producing cells are scattered throughout the intestine. Gluttonous goby (Chasmichthys gulosus), which is stomach fish, mucus-secreting goblet cells are most abundant in the mid intestine portion (P<0.05), whereas CCK-producing cells are observed only in the anterior and mid intestine portion. Trident goby (Tridentiger obscurus) which is stomach fish, mucus-secreting goblet cells were most abundant in the mid intestine portion (P<0.05). CCK-producing cells are found in the anterior and mid intestine portion. Giurine goby, Rhinogobius giurinus which is also stomach fish, the largest number of mucus-secreting goblet cells showed in anterior intestine portion except for esophagus (P<0.05). CCK-producing cells are present only in the anterior and mid intestine portion. InS. geneionema, digestive action occurs in the posterior intestine portion to protect and functions to activate digestion. In contrast, inC. gulosus,T. obscurusandR. giurinus, their digestive action occurs in the anterior and mid intestine portion to protect and functions to activate digestion. Further studies of the modes of food ingestion by these fish, the contents of their digestive tracts, and the staining characteristics of the goblet cells need to be carried out.
authors: Aquaculture Management Division, National Institute of Fisheries Science (NIFS), Busan 46083, Korea.
authors: Sang-Woo
authors: SW
authors: Hur
authors: Aquaculture Management Division, National Institute of Fisheries Science (NIFS), Busan 46083, Korea.
authors: Shin-Kwon
authors: SK
authors: Kim
authors: Aquaculture Management Division, National Institute of Fisheries Science (NIFS), Busan 46083, Korea.
authors: Dae-Jung
authors: DJ
authors: Kim
authors: Aquaculture Management Division, National Institute of Fisheries Science (NIFS), Busan 46083, Korea.
authors: Bae-Ik
authors: BI
authors: Lee
authors: Aquaculture Management Division, National Institute of Fisheries Science (NIFS), Busan 46083, Korea.
authors: Su-Jin
authors: SJ
authors: Park
authors: Aquaculture Management Division, National Institute of Fisheries Science (NIFS), Busan 46083, Korea.
authors: Hyung-Gyu
authors: HG
authors: Hwang
authors: Aquaculture Management Division, National Institute of Fisheries Science (NIFS), Busan 46083, Korea.
authors: Je-Cheon
authors: JC
authors: Jun
authors: Aquaculture Management Division, National Institute of Fisheries Science (NIFS), Busan 46083, Korea.
authors: Jeong-In
authors: JI
authors: Myeong
authors: Marine Science Institute, Jeju National University, Jeju 63333, Korea.
authors: Chi-Hoon
authors: CH
authors: Lee
authors: Marine Science Institute, Jeju National University, Jeju 63333, Korea.
authors: Young-Don
authors: YD
authors: Lee
keywords: CCK-producing cell; Gobiidae; Mucus-secreting goblet cells; Stomach fish; Stomachless fish