齐口裂腹鱼鳞片发生及覆盖过程研究
THE SCALE FORMATION AND DEVELOPMENT IN JUVENILE OF SCHIZOTHORAX PRENANTI
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摘要: 观察了实验室养殖条件下齐口裂腹鱼稚鱼鳞片的发生和覆盖过程。结果表明，稚鱼体长为30.732.3 mm时，鳞片最先出现在鳃盖后缘侧线处；体长为45.347.9 mm时，鳞片覆盖完毕，体长和日龄对鳞片覆盖均有显著影响。在鳞片覆盖过程中出现6个鳞片发生起始位置，依次是鳃盖后缘侧线处、尾柄部侧线处、臀鳍基部、腹鳍基部、背鳍基部和峡部。此外，组织切片的观察结果表明，齐口裂腹鱼鳞片发育主要经历了形态发生早期、形态发生晚期、分化早期、分化晚期和折叠期五个阶段。这些研究结果丰富了齐口裂腹鱼早期发育的生物学资料，将有助于了解其在系统学和功能形态学上的特征。Abstract: Scale morphology, growth and the squamation chronology were described for the Schizothorax prenanti reared in the laboratory. The results showed that scale formation including onset and completion occurred at 30.732.3 mm and 45.347.9 mm body length (BL), and the appearance of scale is related to BL and age. The scale of juvenile of S. prenanti were formed at six locations: the lateral line near the posterior border of gill cover, the lateral line near the middle of caudal peduncle, the base of anal fin, the base of pelvic fin, the base of dorsal fin, and isthmus. Furthermore, our results revealed that the scale formation and development were divided into five stages: early morphogenesis, late morphogenesis, early differentiation, late differentiation and scale fold. These results suggest that understanding the pattern of scale formation may be useful in systematics, functional morphology and habitat use.
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Keywords:
- Schizothorax prenanti /
- Scale formation /
- Scale coverage
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