Estimates of the Age, Growth, and Mortality of Triplophysa scleroptera (Herzenstein, 1888) in the Upper Reaches of the Yellow River, China
文献类型： 外文期刊
作者： Li, Peilun 1 ; Liu, Jiacheng 1 ; Wang, Tai 3 ; Wang, Jilong 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Heilongjiang River Fisheries Res Inst, Harbin 150070, Peoples R China
2.Northeast Agr Univ, Coll Anim Sci & Technol, Harbin 150030, Peoples R China
3.Gansu Fisheries Res Inst, Lanzhou 730030, Peoples R China
关键词： Triplophysa scleroptera; age; growth; mortality
期刊名称：FISHES （ 影响因子：2.3； 五年影响因子：2.4 ）
ISSN：
年卷期： 2023 年 8 卷 9 期
页码：
收录情况： SCI
摘要： To investigate the age composition, growth pattern, mortality, and exploitation rate of Triplophysa scleroptera in the upper reaches of the Yellow River, we measured the total length (L) and body weight (W) of 347 individuals based on three sampling surveys from 2022 to 2023. The otoliths were used in this investigation to determine age. The total length of the collected samples ranged from 5.69 cm to 18.40 cm, body weight ranged from 1.65 g to 50.22 g, and the age ranged from 1 to 7 years old. The relationship of total length and body weight was W = 0.009L(2.942) for the total samples, and the growth pattern observed in the study belongs to the isometric type. The von Bertalanffy growth equation revealed that the fish had an asymptotic total length L-infinity of 37.536 cm, and the growth coefficient K was 0.064 yr(-1). Total instantaneous mortality rate (Z) of total samples calculated by the age-based catch curve method was 1.092 yr(-1). The average instantaneous rate of the natural mortality (M), estimated by three different methods, for the total samples was 0.237 yr(-1). The instantaneous rate of fishing mortality (F) for the total samples was calculated as 0.855 yr(-1), and the exploitation rate (E) was determined as 0.783. As a whole, compared with other Triplophysa fishes, the growth rate of T. scleroptera in the upper reaches of the Yellow River is relatively slow, and the population of T. scleroptera has been overexploited. It is crucial to establish some effective management strategies to protect this species.
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