Population parameters of golden ponyfish, Photopectoralis aureus and goldstripe ponyfish, Karalla daura from Saint Martin Island, Bay of Bengal

Fahmida Akter, Tanzim Akter, Mohammad Abdul Momin Siddique
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Abstract

Golden ponyfish Photopectoralis aureus and Goldstripe ponyfish Karalla daura are small fish with less economic value. Many marine fish population parameters were not investigated because of their low commercial value. Therefore, the primary goals of this study were to determine the size frequency, length-weight relationship (LWR), length-length relationship (LLR), and Fulton’s condition factor (Kn) of two tropical ponyfishes from Saint Martin’s Island. From March to April 2022, specimens were caught using fixed purse nets. A total of 409 specimens of P. aureus and K. daura were measured to determine size frequency, LWRs, LLRs, and Fulton's condition factor. For P. aureus, the maximum total length (TL) of 12.9 cm sets a new record. The LWRs for P. aureus and K. daura were highly significant (p<0.001), where the coefficient of determination (r2) was 0.985 and 0.869 for P. aureus and K. daura, respectively. The estimated slope (b) for P. aureus and K. daura were 3.147 and 2.986, respectively. The LLR equations were TL = 1.1089 SL + 0.2689 for P. aureus and TL = 0.6792 SL + 3.3309 for K. daura. The Kn value had no significant difference between the species of different length classes for P. aureus (0.97-1.40) and K. daura (1.19-1.26). There has never been any prior reporting of LWRs or length-length relationships (LLRs) for P. aureus in literature or FishBase. The study's findings may benefit the management and conservation of these ponyfishes. Res. Agric. Livest. Fish. Vol. 11, No. 1, April 2024: 105-114
孟加拉湾圣马丁岛金马鱼(Photopectoralis aureus)和金纹马鱼(Karalla daura)的种群参数
金马鱼 Photopectoralis aureus 和金纹马鱼 Karalla daura 是经济价值较低的小型鱼类。由于其商业价值较低,许多海洋鱼类种群参数没有得到调查。因此,本研究的主要目标是确定圣马丁岛两种热带马鱼的大小频率、长度-重量关系(LWR)、长度-长度关系(LLR)和富尔顿条件因子(Kn)。2022 年 3 月至 4 月期间,使用固定围网捕获了标本。共测量了 409 条 P. aureus 和 K. daura 标本,以确定尺寸频率、长宽比、长宽比和富尔顿条件因子。P. aureus的最大总长(TL)为12.9厘米,创造了新的记录。P. aureus 和 K. daura 的 LWRs 非常显著(p<0.001),P. aureus 和 K. daura 的决定系数(r2)分别为 0.985 和 0.869。金黄色葡萄球菌和 K. daura 的估计斜率(b)分别为 3.147 和 2.986。金黄色葡萄球菌的 LLR 方程为 TL = 1.1089 SL + 0.2689,K. daura 的 LLR 方程为 TL = 0.6792 SL + 3.3309。金黄色葡萄球菌(0.97-1.40)和 K. daura(1.19-1.26)的 Kn 值在不同长度等级的物种之间没有明显差异。此前,文献或 FishBase 中从未报道过金黄色葡萄球菌的 LWRs 或长度关系(LLRs)。该研究结果可能有利于这些马鱼的管理和保护。Agric.Livest.Fish.第 11 卷,第 1 期,2024 年 4 月:105-114
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