Comparative Morphology of Egg Cases in Three Elasmobranch Species and the Secretion Process in the Kong Skate Okamejei kenojei
文献类型：期刊论文
| 作者 | Gao, Guang6; Guan, Bingxin5; Wang, Shihao2; Shao, Guangbin4; Zhang, Jiawei4; Xiao, Zhizhong1,3; Wang, Kun6 |
| 刊名 | JOURNAL OF MORPHOLOGY
 |
| 出版日期 | 2025-11-29 |
| 卷号 | 286期号:12页码:10 |
| 关键词 | biomaterials egg case functional morphology reproductive biology |
| ISSN号 | 0362-2525 |
| DOI | 10.1002/jmor.70102 |
| 通讯作者 | Xiao, Zhizhong(xzz@qdio.ac.cn) ; Wang, Kun(wangkun@nwpu.edu.cn) |
| 英文摘要 | Egg cases in oviparous cartilaginous fishes (sharks, rays, and chimaeras) exhibit diverse morphologies that are closely tied to species-specific reproductive adaptations. However, the diversity and formation mechanisms of these structures remain poorly understood. In this study, we performed a quantitative morphological analysis of egg cases from three species: Okamejei kenojei, Cephaloscyllium sarawakense, and Chiloscyllium plagiosum. The results demonstrated that the egg cases of these species could be distinguished using multiple morphological indices (p < 0.05), supporting species-specificity in egg case morphology. In these species, we observed that egg jelly initially envelops the egg case during early embryonic development and later dissolves, allowing seawater entry-suggesting a conserved reproductive strategy within Elasmobranchii. Furthermore, under artificial breeding conditions, observations of female O. kenojei showed that ovulation occurs before egg case secretion. Specifically, eggs reach the oviduct above the oviducal gland when about half of the egg case has formed. Immunohistochemical staining revealed estrogen and progesterone receptors in the oviductal gland cells. Interestingly, O. kenojei can produce malformed eggs with shark egg case-like features under captive breeding conditions. These findings provide new insights into the species-specificity, timing, and hormonal regulation of egg case formation in cartilaginous fishes, and lay a foundation for future research on their reproductive strategies. |
| WOS关键词 | OVIDUCAL GLAND ; SHARK ; SCYLIORHINIDAE ; CHONDRICHTHYES ; EVOLUTION ; CAPSULE ; PROVIDES ; NURSERY ; FISH |
| 资助项目 | This study was financially supported by Key R&D Program of Shandong Province, China (2022LZGC016) and National Natural Science Foundation of China (32370452). |
| WOS研究方向 | Anatomy & Morphology |
| 语种 | 英语 |
| WOS记录号 | WOS:001627761200001 |
| 出版者 | WILEY |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/204277]  |
| 专题 | 海洋研究所_实验海洋生物学重点实验室 |
| 通讯作者 | Xiao, Zhizhong; Wang, Kun |
| 作者单位 | 1.Chinese Acad Sci, Qingdao, Peoples R China 2.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, State Key Lab Mariculture Biobreeding & Sustainabl, Qingdao, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Ctr Ocean Mega Sci, Shandong Prov Key Lab Expt Marine Biol, Qingdao, Peoples R China 4.Laizhou Mingbo Aquat Co Ltd, Laizhou, Peoples R China 5.Shandong Univ, Hosp 2, Cheeloo Coll Med, Dept Pathol, Jinan, Peoples R China 6.Northwestern Polytech Univ, Sch Ecol & Environm, Shaanxi Key Lab Qinling Ecol Intelligent Monitorin, Xian, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao, Guang,Guan, Bingxin,Wang, Shihao,et al. Comparative Morphology of Egg Cases in Three Elasmobranch Species and the Secretion Process in the Kong Skate Okamejei kenojei[J]. JOURNAL OF MORPHOLOGY,2025,286(12):10. |
| APA | Gao, Guang.,Guan, Bingxin.,Wang, Shihao.,Shao, Guangbin.,Zhang, Jiawei.,...&Wang, Kun.(2025).Comparative Morphology of Egg Cases in Three Elasmobranch Species and the Secretion Process in the Kong Skate Okamejei kenojei.JOURNAL OF MORPHOLOGY,286(12),10. |
| MLA | Gao, Guang,et al."Comparative Morphology of Egg Cases in Three Elasmobranch Species and the Secretion Process in the Kong Skate Okamejei kenojei".JOURNAL OF MORPHOLOGY 286.12(2025):10. |
入库方式： OAI收割
来源：海洋研究所
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