Goo In Bon, Gil Hyun Woo, Park In-Seok
Division of Marine Environment and Bioscience, Korea Maritime and Ocean University, Busan 606-791, Republic of Korea.
Dev Reprod. 2013 Dec;17(4):427-34. doi: 10.12717/DR.2013.17.4.427.
The histological changes in the Ussurian bullhead, Leiocassis ussuriensis, and the Korean bullhead, Pseudobagrus fulvidevrepaco, were observed during the early period of growth. The retinas size of both species increased in the 9 days post-hatching (DPH) (p<0.05). In the just-hatched Ussurian bullhead, the retina already consisted of six layers: the epithelial layer, ganglion cell layer, inner nuclear layer, inner plexiform layer, outer limiting membrane layer, and rod and cone layer. The Korean bullhead had the same components. At 50 DPH, the thickness of the retina was 538.0±7.19 μm in the Ussurian bullhead and 558.9±9.44 μm in the Korean bullhead. The relative thickness of each layer of the retina did not differ significantly in the two species. Although the growth of the Korean bullhead's retina was faster, the relative thickness of each layer in the retina did not change during early development. After hatching, some parts of the tissue gradually became denser. Immediately after hatching, the kidney and midgut epithelium of the Ussurian bullhead and Korean bullhead were already formed and grew gradually thereafter. From 0 DPH to 30 DPH, the nuclear height in the midgut epithelium did not differ significantly between the two species, but at 50 DPH, it was 11.4±2.45 μm in the Korean bullhead and 9.9± 2.13 μm in the Ussurian bullhead. During the experimental period, the major axes, minor axes, surface areas, and volumes of the proximal tubule cells in the kidney did not differ significantly between the two species. Thus, the early histological development of the Ussurian bullhead is similar to that of the Korean bullhead.
在生长早期观察了乌苏里拟鲿（Leiocassis ussuriensis）和黄颡鱼（Pseudobagrus fulvidevrepaco）的组织学变化。两种鱼在孵化后9天（DPH）时视网膜大小均增加（p<0.05）。刚孵化的乌苏里拟鲿视网膜已由六层组成：上皮层、神经节细胞层、内核层、内网层、外限制膜层以及视杆和视锥层。黄颡鱼也有相同的组成部分。在50 DPH时，乌苏里拟鲿视网膜厚度为538.0±7.19μm，黄颡鱼为558.9±9.44μm。两种鱼视网膜各层的相对厚度无显著差异。虽然黄颡鱼视网膜生长较快，但在早期发育过程中视网膜各层的相对厚度没有变化。孵化后，组织的某些部分逐渐变得致密。乌苏里拟鲿和黄颡鱼孵化后，肾脏和中肠上皮立即形成并随后逐渐生长。从0 DPH到30 DPH，两种鱼中肠上皮细胞核高度无显著差异，但在50 DPH时，黄颡鱼为11.4±2.45μm，乌苏里拟鲿为9.9±2.13μm。在实验期间，两种鱼肾脏近端小管细胞的长轴、短轴、表面积和体积无显著差异。因此，乌苏里拟鲿的早期组织学发育与黄颡鱼相似。
