TABLE 4 in Schizodon unimaculatus, a new species from the lower Rio São Francisco with a reappraisal of the Schizodon species presenting a caudal-peduncle blotch (Teleostei: Anostomidae)
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TABLE 4. Principal component analysis of Schizodon knerii (n=9) and S. unimaculatus (n=8). Variable loadings of ten characters for principal component axis 1 and 2. Asterisks represent main characters distinguishing the two species. PC 1PC 2Eigenvalue0.00460.0021% of variance45.9020.88Standard length-0.0790-0.0357Head length0.04520.1448Trunk length-0.1117-0.0863Body depth0.4434*0.2676*Predorsal length-0.14410.0113Snout length0.05100.2275Interorbital width0.2040*0.2357*Orbital diameter-0.01500.4354*Caudal peduncle depth0.09910.1937Ninth anal fin ray length0.6766*-0.3752*Interopercular width-0.1315-0.0072Head depth-0.2082*-0.0086Premaxillary length-0.4328*-0.1627Mandibular width0.0439-0.6300*
表4. 克氏锯脂鲤(Schizodon knerii,n=9)与单斑锯脂鲤(S. unimaculatus,n=8)的主成分分析(Principal Component Analysis)。本表呈现了主成分轴1与主成分轴2的10个形态性状的变量载荷(Variable Loadings),星号标注的为区分两个物种的关键形态性状。 | 性状 | PC1 | PC2 | | ---- | ---- | ---- | | 特征值(Eigenvalue) | 0.0046 | 0.0021 | | 方差贡献率(% of Variance) | 45.90% | 20.88% | | 标准体长(Standard Length) | -0.0790 | -0.0357 | | 头长(Head Length) | 0.0452 | 0.1448 | | 躯干长(Trunk Length) | -0.1117 | -0.0863 | | 体高(Body Depth) | 0.4434* | 0.2676* | | 背前长(Predorsal Length) | -0.1441 | 0.0113 | | 吻长(Snout Length) | 0.0510 | 0.2275 | | 眶间距(Interorbital Width) | 0.2040* | 0.2357* | | 眼径(Orbital Diameter) | -0.0150 | 0.4354* | | 尾柄高(Caudal Peduncle Depth) | 0.0991 | 0.1937 | | 第9臀鳍鳍条长(Ninth Anal Fin Ray Length) | 0.6766* | -0.3752* | | 间鳃盖骨宽(Interopercular Width) | -0.1315 | -0.0072 | | 头高(Head Depth) | -0.2082* | -0.0086 | | 前上颌骨长(Premaxillary Length) | -0.4328* | -0.1627 | | 下颌骨宽(Mandibular Width) | 0.0439 | -0.6300* |



