Date Received: 05-09-2025
Date Accepted: 30-10-2025
Date Published: 23-01-2026
##submissions.doi##: https://doi.org/10.31817/tckhnnvn.2026.24.1.04
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Biological Characteristics of the Southern Rough Shrimp Trachysalambria longipes (Paulson, 1875) in the Coastal Waters of Quang Ngai Province
,
Tran Van Cuong
1
Keywords
Mortality coefficient, exploitation rate, biology, growth, southern rough shrimp
Abstract
This study was conducted to determine the biological characteristics, growth pattern, and mortality parameters of the southern rough shrimp Trachysalambria longipes (Paulson, 1875) in the coastal waters of Quang Ngai, serving as a basis for sustainable stock assessment and management. A total of 1,421 individuals were collected monthly from trawl catches between April 2021 and September 2022. Body length, body weight, and sex were recorded to analyze the length-weight relationship, estimate the von Bertalanffy Growth Function (VBGF), and determine mortality parameters. The length-weight regression for the population was W = 0.3535 × 10⁻⁴ × BL²·⁸¹ (R² = 0.90), indicating a negative allometric growth pattern, with body length increasing faster than weight. The VBGF growth parameters were BL∞ = 115mm, K = 1.4 year⁻¹, and Φ′ = 2.27. Females matured at 74 mm body length, spawned year-round with peaks in June and September, and dominated the population (male:female ratio 0.39:1.00). Estimated mortality parameters were M = 2.96 year⁻¹, F = 2.64 year⁻¹, and Z = 5.60 year⁻¹, with an exploitation rate E = 0.47 close to the optimum level (0.5), indicating a moderate fishing pressure and that the population has not yet been overexploited.
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