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Your search keyword '"Xiao, Zhizhong"' showing total 199 results
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199 results on '"Xiao, Zhizhong"'

20. How the Skate Embryo Develops: A Fine Developmental Timeline of Kong Skate Okamejei kenojei (Müller & Henle, 1841)

Author

Gao Guang, Xiao Zhizhong, Ma Yuting, Chen Xiao, Xiao Yongshuang, and Li Jun

Subjects
skate, batoids, Okamejei kenojei, embryonic stages, development, Science, General. Including nature conservation, geographical distribution, QH1-199.5
Abstract

Cartilaginous fishes, as an important group of jawed vertebrates, hold great promise for improving our understanding of vertebrate evolution. Previous studies have established a good staging scheme for shark embryos. However, to date, little attention has been paid to the development of skate embryos. In this study, we established a fine developmental timeline for the Kong skate. We hatched eggs of the Kong skate (Okamejei kenojei) at fixed temperatures (16.5°C ± 0.5°C) while observing three samples every day and recorded the complete embryonic development. The embryo weight and development time were found to have a quadratic relationship. The weight-at-day curve was fitted by y = 0.0005x2 - 0.0109x + 0.0882 (R² = 0.9406). In addition, complete embryonic development from gastrula to skate larvae took 92 ± 5 days. Here, we divided the entire development process into 39 stages. This shows that the jaw of O. kenojei is developed from the first pair of pharyngeal arches, and its body disc is formed by the fusion of the pectoral fin and head. The eyespots began to form from stage 36 and then became thicker and bigger until the young skate broke out of the egg. Notably, we found that males and females develop differently from stage 31; the end of the male pelvic fins expands inward, which develop into copulatory organ-claspers, whereas in the females, they do not expand. To the best of our knowledge, this is the first study to record the embryonic development of eyes, body discs, eyespots, and other organs of O. kenojei in detail. We hope that our work will provide valuable information for researchers to identify specific time points for developing skate embryos.

Published
2022
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36. The ontogeny of acidic digestive tract in larval turbot Scophthalmus maximus based on H+/K+-ATPase and pepsinogen.

Author

Wang, Yanfeng, Liu, Shulan, Guo, Teng, Xu, Shihong, Liu, Qinghua, Xiao, Zhizhong, Ma, Daoyuan, Li, Jun, and Chi, Liang

Subjects
ALIMENTARY canal, SCOPHTHALMUS, ADENOSINE triphosphatase, PEPSINOGEN, MARINE fishes
Abstract

Acidic digestion is an important digestive process of marine fish. In fish stomach, two enzymes are involved in the secretion of hydrochloric acid (HCl) and proteomic digestion: H+/K+-ATPase and pepsinogen. However, the starting of digestive function in fish is still unclear. To reveal the details of acidic digestion of turbot Scophthalmus maximus in early development, a 40 day of turbot larvae culture was conducted. The H+/K+-ATPase gene from the turbot S. maximus (smH+/K+-ATPase) was identified and characterized. Based on our previous discription on pepsinogen of turbot S. maximus, we combined pepsinogen and H+/K+-ATPase and analyzed the mechanism of acidic digestion in turbot. Results show that the spatial and temporal expression profiles of H+/K+-ATPase agreed with pepsinogen A and C in turbot, indicating a synergetic action between H+/K+-ATPase and pepsinogen during the acidic digestion process. In addition, the turbot juveniles showed a faster growth after the expressions of H+/K+-ATPase gene and pepsinogen gene, demonstrating that pepsin had a higher digestive efficiency, for which a compound diet should be provided to the fish from Day 22 onward. This study provided a reference for biology research and aquaculture of turbot and other marine fishes. [ABSTRACT FROM AUTHOR]

Published
2023
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48. The Research of Population Genetic Differentiation for Marine Fishes (Hyporthodus septemfasciatus) Based on Fluorescent AFLP Markers

Author

Yongshuang Xiao, Jing Liu, Ma Daoyuan, Jun Li, Xiao Zhizhong, and Liu Qinghua

Subjects
education.field_of_study, Hyporthodus septemfasciatus, Evolutionary biology, InformationSystems_INFORMATIONSTORAGEANDRETRIEVAL, Population, Amplified fragment length polymorphism, Biology, education, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), Genetic differentiation
Published
2019
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