气候变化领域集成服务门户(CCPortal): Reproductive Characteristics of Pseudecheneis sulcatus (Siluriforms: Sisoridae) in the Lower Yarlung Zangbo River, Tibet

CCPortal

DOI	10.3390/fishes8020106
	Reproductive Characteristics of Pseudecheneis sulcatus (Siluriforms: Sisoridae) in the Lower Yarlung Zangbo River, Tibet
	Lin, Pengcheng; Hu, Huaming; Gong, Zheng; Wang, Jian; Gao, Xin
发表日期	2023
EISSN	2410-3888
卷号	8 期号:2
英文摘要	The present research offers novel understandings of the reproductive biology of Pseudecheneis sulcatus (McClelland, 1842) found in the Yarlung Zangbo Grand Canyon, a biodiversity hotspot. Reproductive characteristics of Pseudecheneis sulcatus, including their maturation age, fertility, spawning season, and maximum body size, constitute important aspects of its life-history traits. We collected a total of 310 specimens from the Yarlung Zangbo River's Motuo reach between March and November 2016 and found the male-to-female ratio to be 0.73:1, markedly different from the anticipated 1:1. The total length of individuals ranged from 72 to 207 mm, while overall weight ranged from 2.5 to 65.0 g. Their length at first maturity was estimated as 131 mm in males and 132 mm in females. Based on the adult proportion and fluctuation in the monthly gonadosomatic index (GSI) and size distribution of oocytes, spawning was determined to occur from March to June. The absolute fecundity ranged between 247 and 2886 eggs, while the fluctuation in average relative fertility ranged between 16.8 and 77.1 eggs/g of fish. The fecundity of P. sulcatus was linearly correlated to the overall weight and length of the fish along with the ovarian weight. In conclusion, P. sulcatus spawned synchronously in spring and early summer, exhibiting low fecundity and large oocytes. Our results provided basic information in understanding how this species adapted well to the unique canyon environment, which may be useful for developing a sustainable conservation plan for P. sulcatus at the lower reach of the Yarlung Zangbo River.
关键词	reproductive biology first maturity spawning season fecundity environmental adaptation
英文关键词	LENGTH-WEIGHT RELATIONSHIPS; GONADOSOMATIC INDEX; TSANGPO RIVER; FISH; CYPRINIDAE; MATURITY; BIOLOGY; SIZE; BASIN
WOS研究方向	Fisheries ; Marine & Freshwater Biology
WOS记录号	WOS:000939089400001
来源期刊	FISHES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283424
作者单位	Chinese Academy of Sciences; Institute of Hydrobiology, CAS; China West Normal University; Zaozhuang University
推荐引用方式 GB/T 7714	Lin, Pengcheng,Hu, Huaming,Gong, Zheng,et al. Reproductive Characteristics of Pseudecheneis sulcatus (Siluriforms: Sisoridae) in the Lower Yarlung Zangbo River, Tibet[J],2023,8(2).
APA	Lin, Pengcheng,Hu, Huaming,Gong, Zheng,Wang, Jian,&Gao, Xin.(2023).Reproductive Characteristics of Pseudecheneis sulcatus (Siluriforms: Sisoridae) in the Lower Yarlung Zangbo River, Tibet.FISHES,8(2).
MLA	Lin, Pengcheng,et al."Reproductive Characteristics of Pseudecheneis sulcatus (Siluriforms: Sisoridae) in the Lower Yarlung Zangbo River, Tibet".FISHES 8.2(2023).