Multiple Fetal Nutritional Patterns Before Parturition in Viviparous Fish Sebastes schlegelii (Hilgendorf, 1880)

doi:10.3389/fmars.2020.571946

IOCAS-IR > 实验海洋生物学重点实验室

	Multiple Fetal Nutritional Patterns Before Parturition in Viviparous Fish Sebastes schlegelii (Hilgendorf, 1880)
	Du Tengfei 1,2,3; Xiao Yongshuang 1,2,4; Zhao Haixia1,2,3 ; Zhou Li 1,2,3; Liu Qinghua 1,2; Wang Xueying1,2 ; Li Jun 1,2,4; Xu Shihong 1,2; Wang Yanfeng 1,2; Yu Jiachen 1,2,3; Wu Lele 1,2,3; Wang Yunong 1,2,3; Gao Guang 1,2,3
	2021-01-14
发表期刊	FRONTIERS IN MARINE SCIENCE
卷号	7 页码:13
通讯作者	Li Jun(junli@qdio.ac.cn)
摘要	Sebastes schlegelii is a commercially important fish with a special viviparous reproductive system that is cultured in near-shore seawater net cages in East Asia. In the gonadal development of the species, the gonad of males mature before those of females, which mature after mating. Mating in male/female fishes occurs in October of each year. Then, females undergoing oocyte maturation complete fertilization using stored sperm in March of the following year. The pregnancy is completed when larvae are produced in the ovary. It has been reported that embryonic nutrient supply originates entirely from the female viviparous reproductive systems. However, until now, the nutritional patterns and the processes of nutrient provision in S. schlegelii before parturition have not been clear. The goal of this research was to study the embryos, larvae and juveniles of S. schlegelii during pregnancy. Anatomical observations, light microscopy and scanning electron microscopy were used to study the developmental characteristics of early embryos and larvae and the connecting structures between the mother and the fetus. The results showed the following: (1) Placental-like structures were found during the process of embryonic development in S. schlegelii, and these placental-like structures proliferated after fertilization. (2) The embryos of S. schlegelii were encased by a saclike structure composed of blood vessels, connective tissue, and surface epithelial cells. The vessels near the embryo existed in the thecal layer. Vascularized proliferation was detected following embryonic development. (3) Starting in the gastrula stage, connections between the embryo and surrounding cells loosened, and ovarian fluid became abundant. In addition, a large number of small holes and cristae were observed on the surface of the embryo. We speculate that embryos may be able to absorb nutrients from the ovarian fluid. (4) Yolk was present throughout embryo development. (5) Two types of nutritional modes were observed, lecithotrophic and matrotrophic during embryonic development. Three forms of placental analogs may exist in S. schlegelii: (1) external epithelial absorptive surfaces; (2) trophonemata, with modifications of the ovarian epithelia for absorbing the histotroph; and (3) a follicular pseudoplacenta, with close apposition between follicle cells and embryonic absorptive epithelia.
关键词	fish viviparity fetal nutrition matrotrophy lecithotrophy placental analogs
DOI	10.3389/fmars.2020.571946
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program[2018YFD0901204] ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0402] ; Major Agricultural Application Technology Innovation Project of Shandong Province[SD2019YY011] ; Qingdao National Laboratory for Marine Science and Technology[2018SDKJ0502-2] ; China Agriculture Research System[CARS-47] ; Major science and technology for scientific and technological innovation projects (Shandong)[2019JZZY020710] ; STS Project[KFZD-SW-106] ; STS Project[ZSSD-019] ; STS Project[2017T3017] ; STS Project[2019T3022]
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
WOS类目	Environmental Sciences ; Marine & Freshwater Biology
WOS记录号	WOS:000612337100001
出版者	FRONTIERS MEDIA SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/169680
专题	实验海洋生物学重点实验室
通讯作者	Li Jun
作者单位	1.Chinese Acad Sci, Ctr Ocean Mega Sci, Key Lab Expt Marine Biol, Qingdao, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou, Peoples R China
推荐引用方式 GB/T 7714	Du Tengfei,Xiao Yongshuang,Zhao Haixia,et al. Multiple Fetal Nutritional Patterns Before Parturition in Viviparous Fish Sebastes schlegelii (Hilgendorf, 1880)[J]. FRONTIERS IN MARINE SCIENCE,2021,7:13.
APA	Du Tengfei.,Xiao Yongshuang.,Zhao Haixia.,Zhou Li.,Liu Qinghua.,...&Gao Guang.(2021).Multiple Fetal Nutritional Patterns Before Parturition in Viviparous Fish Sebastes schlegelii (Hilgendorf, 1880).FRONTIERS IN MARINE SCIENCE,7,13.
MLA	Du Tengfei,et al."Multiple Fetal Nutritional Patterns Before Parturition in Viviparous Fish Sebastes schlegelii (Hilgendorf, 1880)".FRONTIERS IN MARINE SCIENCE 7(2021):13.

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