title: Comparative Analysis of the Morphometric Changes in Ussurian bullhead, Leiocassis ussuriensis, and Korean bullhead, Pseudobagrus fulvidraco, in the Early Period of Growth.
abstract: Morphometric changes in the Ussurian bullhead, Leiocassis ussuriensis, and the Korean bullhead, Pseudobagrus fulvidraco, were observed during the early period of growth. Yolk length, yolk height, and yolk volume in the two species decreased within 9 days post-hatching (DPH) (p<0.05). The body lengths and body heights of both species increased gradually to 150 and 130 DPH, respectively (p<0.05). The horizontal distance between the anteriormost extension of the head and the anterior insertion of the pectoral fin, the anteriormost extension of the head × the verticality position of the anterior insertion of the primary dorsal fin rays, and the anterior insertion of the primary dorsal fin × the anterior insertion of the pectoral fin were greater in the Korean bullhead than in the Ussurian bullhead (p<0.05). However, the relative sizes of the head region, pectoral fin, ventral fin, and anal fin were greater in the Ussurian bullhead than in the Korean bullhead (p<0.05), and relative body depth and the size of the outer-mandible barbel were greater in the Korean bullhead than in the Ussurian bullhead (p<0.05). The growth curves of the morphometric characteristics of both species were divided into three types.
authors.affiliation: Inland Aquaculture Research Center, National Fisheries Research & Development Institute, Jinhae 645-758, Republic of Korea.
authors.forename: Sang Gu
authors.initials: SG
authors.lastname: Lim
authors.affiliation: Inland Aquaculture Research Center, National Fisheries Research & Development Institute, Jinhae 645-758, Republic of Korea.
authors.forename: Hyoung Kyun
authors.initials: HK
authors.lastname: Han
authors.affiliation: Biotechnology Research Division, National Fisheries Research & Development Institute, Busan 619-705, Republic of Korea.
authors.forename: Jung Ha
authors.initials: JH
authors.lastname: Kang
authors.affiliation: Division of Marine Environment and Bioscience, Korea Maritime and Ocean University, Busan 606-791, Republic of Korea.
authors.forename: Hye Jung
authors.initials: HJ
authors.lastname: Park
authors.affiliation: Division of Marine Environment and Bioscience, Korea Maritime and Ocean University, Busan 606-791, Republic of Korea.
authors.forename: Ji Su
authors.initials: JS
authors.lastname: Oh
authors.affiliation: Division of Marine Environment and Bioscience, Korea Maritime and Ocean University, Busan 606-791, Republic of Korea.
authors.forename: Ji Su
authors.initials: JS
authors.lastname: Lim
authors.affiliation: Division of Marine Environment and Bioscience, Korea Maritime and Ocean University, Busan 606-791, Republic of Korea.
authors.forename: In Bon
authors.initials: IB
authors.lastname: Goo
authors.affiliation: Division of Marine Environment and Bioscience, Korea Maritime and Ocean University, Busan 606-791, Republic of Korea.
authors.forename: In-Seok
authors.initials: IS
authors.lastname: Park
keywords: Korean bullhead; Leiocassis ussuriensis.; Morphometric characteristic; Pseudobagrus fulvidraco; Ussurian bullhead