The current study provide the baseline information on the temporal (monthly) variations of condition through multiple functions (allometric, K_A; Fulton’s, K_F; relative, K_R) and prey-predator status through relative weight (W_R) for Eutropiichthys vacha (Hamilton, 1822) from the Ganges River, northwestern Bangladesh over one year. The smallest individuals were 6.5 and 6.2 cm in TL, whereas the largest were 19.9 and 20.6 cm in TL for males and females, respectively. No significant differences were observed in the length frequency distribution, LFDs (p = 0.8152) for both sexes. K_F was significantly correlated with TL for both sexes (p < 0.001) and K_F was treated as the best condition factor therefore, well-being of E. vachaa. There was no significant correlation among TL vs K_A, TL vs K_R and TL vs W_R for males and females, respectively. But BW showed highly significant correlations with all condition factors, i.e., BW vs K_A; BW vs K_F; BW vs K_R, and BW vs W_R (p < 0.001) for both sexes. Additionally, W_R revealed no significant dissimilarities from 100 for males (p = 0.432) unlike females (p = 0.023), based on Wilcoxon signed-rank tests, suggesting that habitat was more suitable for males than females for food availability relative to predator presence. Moreover, this study assessed for the first time the effect of temperature and rainfall on monthly K_F for E. vacha in the Ganges River. The Pearson correlation test found no significant relation between temperature and K_F (r = 0.2226, p = 0.4868 for males; r = 0.2172, p = 0.4977 for females), but significant correlations were found between rainfall and K_F (r = 0.6357, p = 0.0263 for males and r = 0.6983, p = 0.0115 for females).

中文翻译：

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通过多模型推论得出孟加拉西北部恒河中甲壳Eu鱼Eutropiichthys vacha（汉密尔顿，1822年）的状况和猎物-捕食者状态的时间变化

目前的研究提供了关于时间（月）的条件通过多种功能变化的基线信息（异速生长，ķ_甲;富尔顿，ķ _˚F ;相对的，ķ _{- [R} ），并通过相对重量捕食状态（w ^ _{- [R} ），用于Eutropiichthys瓦查（汉密尔顿，1822年），来自孟加拉国西北部的恒河，历时一年。最小的个体在TL中为6.5和6.2 cm，而最大的个体在雄性和雌性中分别为19.9和20.6 cm。男女的长度频率分布LFD（p = 0.8152）均未观察到显着差异。ķ _˚F性别与TL显着相关（p <0.001），K _F被视为最佳条件因素，因此，E。vachaa的健康。男性和女性的TL vs K _A，TL vs K _R和TL vs W _R之间均无显着相关性。但是体重与所有条件因素之间都显示出高度显着的相关性，即体重与K _A；体重vs K _F ; 男女的BW vs K _R和BW vs W _R（p <0.001）。另外，W _R 根据Wilcoxon秩和检验，根据雄性显示，与雌性（p = 0.023）相比，雄性（p = 0.432）与100之间没有显着差异，这表明相对于掠食者的存在，栖息地比雌性更适合雄性。此外，该研究评估首次温度和降雨在每月的效果ķ _˚F为E.瓦查在恒河。皮尔逊相关检验发现温度与K _F之间无显着关系（男性r = 0.2226，p = 0.4868; r = 0.2172，p=女性= 0.4977），但是降雨与K _F之间存在显着相关性（男性= r = 0.6357，p = 0.0263，女性= r = 0.6983，p = 0.0115）。