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Morphological measurements, length weight relationship and relative condition factor (Kn) of Obtuse barracuda Sphyraena obtusata (Cuvier, 1829) from South-eastern Arabian Sea
Indian Journal of Geo-Marine Sciences ( IF 0.4 ) Pub Date : 2021-07-15
M M Meshram, R Mridula, K M Rajesh, N K Suyani

The study investigated morphometric and meristic measurements, length-weight relationship (LWR) and relative condition factor (Kn) of the Sphyraena obtusata from south-eastern Arabian Sea from August 2019 to March 2020. Three hundred and fifty two specimens having a length and weight range of 16.5 – 30.1 cm and 29.54 – 155.20 g, respectively were analyzed for morphological measurements (13 morphometric and 11 meristic), LWR and relative condition factor. The maximum correlation were existed between standard length (r > 0.985), fork length (r > 0.979) and pre-dorsal length 1 (r > 0.942) among the various morphometric variables. A disparity in relative growth was noticed among the morphometric traits. The Regression coefficient b value clearly indicates that growth of all the morphometric characters were isometric in connection with the total length, except for pelvic length (negative allometric), body depth (positive allometric) and caudal depth (positive allometric) (p < 0.01). The length-weight relationship of the individual sexes (male, female) and pooled data is indicated as W = 0.02275 L2.6033, W = 0.01786 L2.6815 and W = 0.01945 L2.6541 having the value of coefficient of determination (r2) as 0.9566, 0.9696 and 0.9658, respectively. The ‘b’ values for both males and females divulge negative allometric growth (p < 0.05). There was no significant difference for the relative condition factor (Kn) among the months and size groups.

中文翻译:

阿拉伯海东南部钝角梭鱼 Sphyraena obtusata (Cuvier, 1829) 的形态测量、长度重量关系和相对条件因子 (Kn)

该研究调查了 2019 年 8 月至 2020 年 3 月来自阿拉伯海东南部的 Sphyraena obtusata 的形态测量和分生测量、长度-重量关系 (LWR) 和相对条件因子 (Kn)。 352 个具有长度和重量的标本16.5 – 30.1 cm 和 29.54 – 155.20 g 范围分别进行形态学测量(13 形态测量和 11 meristic)、LWR 和相对条件因子分析。各种形态测量变量之间的标准长度(r > 0.985)、叉长(r > 0.979)和前背长1(r > 0.942)之间存在最大相关性。在形态测量性状之间注意到相对增长的差异。回归系数 b 值清楚地表明,除了骨盆长度(负异速生长)、身体深度(正异速生长)和尾骨深度(正异速生长)(p < 0.01)外,所有形态测量特征的生长与总长度呈等长关系. 个体性别(男性、女性)和合并数据的体长-体重关系表示为 W = 0.02275 L2.6033、W = 0.01786 L2.6815 和 W = 0.01945 L2.6541 具有决定系数值 (r2)分别为 0.9566、0.9696 和 0.9658。雄性和雌性的“b”值揭示了负异速生长(p < 0.05)。不同月份和大小组之间的相对条件因子 (Kn) 没有显着差异。身体深度(正异速生长)和尾部深度(正异速生长)(p < 0.01)。个体性别(男性、女性)和合并数据的体长-体重关系表示为 W = 0.02275 L2.6033、W = 0.01786 L2.6815 和 W = 0.01945 L2.6541 具有决定系数值 (r2)分别为 0.9566、0.9696 和 0.9658。雄性和雌性的“b”值揭示了负异速生长(p < 0.05)。不同月份和大小组之间的相对条件因子 (Kn) 没有显着差异。身体深度(正异速生长)和尾部深度(正异速生长)(p < 0.01)。个体性别(男性、女性)和合并数据的体长-体重关系表示为 W = 0.02275 L2.6033、W = 0.01786 L2.6815 和 W = 0.01945 L2.6541 具有决定系数值 (r2)分别为 0.9566、0.9696 和 0.9658。雄性和雌性的“b”值揭示了负异速生长(p < 0.05)。不同月份和大小组之间的相对条件因子 (Kn) 没有显着差异。雄性和雌性的“b”值揭示了负异速生长(p < 0.05)。不同月份和大小组之间的相对条件因子 (Kn) 没有显着差异。雄性和雌性的“b”值揭示了负异速生长(p < 0.05)。月份和大小组之间的相对条件因子 (Kn) 没有显着差异。
更新日期:2021-07-15
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