Population dynamics of deepwater rose shrimp (Parapenaeus longirostris, Lucas 1846) along the coast of Ghana

Authors

1 Department of Fisheries and Water Resources, University of Energy and Natural Resources, Sunyani, Ghana

2 Department of Marine and Fisheries Sciences, University of Ghana, Ghana

3 ESL, Ghana

10.22092/ijfs.2025.134243

Abstract

This study provides detailed information on the population structure, growth, mortality, probability of capture, and longevity of the Deep-water rose shrimp (Parapenaeus longirostris, Lucas 1984) along the coast of Ghana. A total of 1,164 specimens were collected monthly from July 2020 to June 2021. The mean total length of the species was 9.72±2.22 cm. The length-weight relationship, in log-transformed format, was Log BW=2.841 Log TL–2.109, indicating a negative allometric growth pattern. The Von Bertalanffy growth parameters for total length were estimated as L∞=17.85 cm TL, t₀=-0.21, and K=0.87 year⁻¹. The critical length at capture ratio was 0.56, suggesting potential growth overfishing due to intensified fishing efforts. Natural and fishing mortality rates were 1.84 per year and 1.98 per year, respectively. The exploitation rate was 0.52, indicating relatively optimal exploitation of the stock along the coast of Ghana. Continuous monitoring and extended closed seasons are some of the recommended management measures required to enhance the sustainability of the sampled species in the coast of Ghana.

Keywords

Iranian Journal of Fisheries Sciences
Volume 24, Issue 5
September 2025
Pages 1081-1091

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