Population Dynamics and Exploitation Level of Stolothrissa tanganicae Regan, 1917 and Limnothrissa miodon (Boulenger, 1906), Two Clupeid Fish Species of Commercial Interest of Burundian Waters Northeast of Lake Tanganyika

Asian Journal of Fisheries and Aquatic Research Pub Date : 2023-08-25 DOI:10.9734/ajfar/2023/v24i6650

Niyonkuru Charles, Ntakirutimana Remy, Ntakimazi Gaspard

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引用次数: 1

Abstract

Aims: Show exploitation level and propose rational management measures of the two clupeid-fish species of commercial interest, Stolothrissa tanganicae and Limnothrissa miodon Study Design: Modeling the demography of clupeid fishes of Lake Tanganyika. Place and Duration of Study: Two stations (Kajaga and Nyamugari) situated in the northern part of Lake Tanganyika on the Burundian coast from December 2019 to April 2020. Methodology: Monthly fish sampling was done with local fishermen Demographic parameters were determined according to the Von Bertalanffy growth model using size frequency distributions based on total length. Excel 2013 and FAO-ICLARM. Stock Assessment Tools (FiSAT II version 1.2.2 software). Results: The values of the growth parameters obtained for each of the two species are close at the level of the two stations. For S. tanganicae, we have L∞= 135 mm and 118 m and K=0.94 yr-1 and 0.99 yr-1 respectively at Kajaga and Nyamugari. For L. miodon, we have L∞= 148 mm and 132 m and K=1.04 yr-1 and 0.92 yr-1 respectively at Kajaga and Nyamugari. The Ø' values obtained are high and vary from 4.14 to 4.58 depending on the species and the stations: For S. tanganicae, higher Ø' was recorded at Kajaga (Ø'= 4.23). In L. miodon, it was observed at Nyamugari (Ø’=4.58). M oscillate around 1 (M varies from 1.08 to 1.17 year-1) for the two species at two stations. F is high everywhere and varies from 3.03 to 6.49 yr-1 depending on the species and the stations. Both species are overexploited : 0.73

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坦噶尼喀湖东北部布隆迪水域两种具有商业价值的长尾鱼(Stolothrissa tanganicae Regan, 1917)和Limnothrissa miodon (Boulenger, 1906)的种群动态和开发水平

目的:了解坦噶尼喀湖两种具有商业价值的长尾鱼(Stolothrissa tanganicae)和长尾鱼(Limnothrissa miodon)的开发利用水平，并提出合理的管理措施。研究地点和时间:2019年12月至2020年4月，位于布隆迪海岸坦噶尼喀湖北部的两个站点(Kajaga和Nyamugari)。方法:每月与当地渔民进行鱼类抽样，根据Von Bertalanffy生长模型，使用基于总长度的尺寸频率分布确定人口统计参数。Excel 2013和FAO-ICLARM。库存评估工具(FiSAT II版本1.2.2软件)。结果:两种植物的生长参数在两站水平上较为接近。在Kajaga和Nyamugari, S. tanganicae的L∞分别为135 mm和118 m, K分别为0.94和0.99 year -1。在Kajaga和Nyamugari, L∞分别为148 mm和132 m, K分别为1.04和0.92 year -1。所获得的Ø'值很高，根据物种和站点的不同在4.14到4.58之间变化:对于S. tanganicae，在Kajaga记录了更高的Ø' (Ø'= 4.23)。L. miodon在Nyamugari (Ø’=4.58)发现。两个站点两个物种的M在1附近振荡(M在1.08 ~ 1.17年-1之间变化)。F到处都很高，根据物种和观测站的不同在3.03到6.49年-1之间变化。两个物种均处于过度开发状态:0.73

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Asian Journal of Fisheries and Aquatic Research

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