Author(s)

Aiju Zhang, Wei Luo, Zhiming Zhou, Aihuan Guo, Qinping Lian, Pengcheng Sheng, Julin Yuan^*

Agriculture Ministry Key Laboratory of Healthy Freshwater Aquaculture, Key Laboratory of Freshwater Aquaculture Genetic and Breeding of Zhejiang Province, Zhejiang Research Center of East China Sea Fishery Research Institute, Zhejiang Institute of Freshwater Fisheries, Huzhou, China.

Population dynamics parameters and stock status of Squaliobarbus curriculus (Richardson, 1846) were analyzed from May to September 2021 in the Lanxi section of Qiantang River. FiSAT II software program was used. The growth coefficient K = 0.21 year^–1, asymptomatic length L_∞ = 39.48 cm, and age at theoretical zero-length t₀ = –0.74 years were estimated. The von Bertalanffy growth function was calculated as L_t = 39.48[1 – e^{–0.21(t + 0.74)}]. The growth curve for weight had an inflection at 5.86 years, corresponding to 29.61 cm in standard length and 372.29 g in weight. The natural mortality rate (M), the fishing mortality rate (F), and the total mortality rate (Z) were calculated as 0.51, 0.61, and 1.12 year^–1, respectively. The exploitation ratio (E) was 0.54, which is greater than the value of 0.5 suggested by Gull (1971), indicating a probable state of overdevelopment. The annual average stock number and biomass of S. curriculus in the Lanxi section of Qiantang River were 31.86 × 10⁶ individuals and 3656.82 t, respectively.

Lanxi Section of Qiantang River, Population Dynamics Parameters, Squaliobarbus curriculus, Stock Assessment

Zhang, A. , Luo, W. , Zhou, Z. , Guo, A. , Lian, Q. , Sheng, P. and Yuan, J. (2023) Growth, Mortality and Stock Assessment of Squaliobarbus curriculus (Actinopterygii: Cypriniformes: Xenocyprididae) from Lanxi Section of Qiantang River, China. Open Journal of Animal Sciences, 13, 298-309. doi: 10.4236/ojas.2023.133022.