Tab. 4 in Ecomorphological relationships of fish assemblages in a trans-Andean drainage, Upper Magdalena River Basin, Colombia

Tab. 4. Eigenvaluesandcontributionoftheecomorphological indices in the first three axes from the principal components (PCA) applied to the correlation matrix formed by 25 attributes of the 29 species analyzed from the trans-Andean Alvarado River drainage, Upper Magdalena River Basin, Colombia. The indices with higher correlation values for each principal component (PC) were shown in bold and selected for interpretation. Ecomorphological indicesPC 1PC 2PC 3Compression index (CI)0.825-0.219-0.183Depression index (DI)-0.4810.2650.194Relative depth (RD)0.8210.4100.235Eye position (EP)-0.9040.2950.099Relative area of pelvic fin (RAPv)-0.1990.7300.495Aspect ratio of pelvic fin (ARPv)0.0940.646-0.602Relative area of pectoral fin (RAPt)0.1410.8170.492Aspect ratio of pectoral fin (ARPt)0.0290.574-0.608Relative lenght of caudal peduncle (RLPd)-0.326-0.0900.218Caudal peduncle compression index (CIPd)0.2120.575-0.591Relative height of caudal peduncle (RHPd)-0.2080.540-0.467Relative width of caudal peduncle (RWPd)0.496-0.098-0.063Relative area of dorsal fin (RAD)-0.0300.5980.727Relative area of caudal fin (RAC)0.4210.7500.290Aspect ratio of caudal fin (ARC)0.3870.469-0.399Relative area of anal fin (RAA)0.7810.0100.186Aspect ratio of anal fin (ARA)0.1860.444-0.696Relative lenght of head (RLHd)0.2210.7700.376Relative height of head (RHHd)-0.4780.5600.498Relative width of head (RWHd)-0.6210.270-0.406Relative height of mouth (RHM)-0.304-0.2900.559Relative width of mouth (RWM)-0.2670.295-0.485Relative area of eye (RAE)0.8610.2070.301Mouth position (MP)-0.6720.2420.037Presence of barbel (Pb)-0.8700.147-0.140Eigenvalue6.665.574.47Explained variance (%)26.6322.2917.91Accumulated variance (%)26.6348.9266.83Broken-stick percentege15.2611.269.26表4. 针对哥伦比亚马格达莱纳河上游流域跨安第斯山脉的阿尔瓦拉多河排水系统中29个被分析物种的25项属性所构建的相关矩阵，应用主成分分析（Principal Components Analysis, PCA）所得前三个主成分轴的生态形态学指标（ecomorphological indices）特征值与贡献度。各主成分（PC）中相关系数较高的指标已以粗体标注，并用于后续解读。 生态形态学指标 PC 1 PC 2 PC 3 压缩指数（Compression index, CI） 0.825 -0.219 -0.183 凹陷指数（Depression index, DI） -0.481 0.265 0.194 相对体高（Relative depth, RD） 0.821 0.410 0.235 眼位（Eye position, EP） -0.904 0.295 0.099 腹鳍相对面积（Relative area of pelvic fin, RAPv） -0.199 0.730 0.495 腹鳍长径比（Aspect ratio of pelvic fin, ARPv） 0.094 0.646 -0.602 胸鳍相对面积（Relative area of pectoral fin, RAPt） 0.141 0.817 0.492 胸鳍长径比（Aspect ratio of pectoral fin, ARPt） 0.029 0.574 -0.608 尾柄相对长度（Relative length of caudal peduncle, RLPd，原文拼写为lenght，应为length） -0.326 -0.090 0.218 尾柄压缩指数（Caudal peduncle compression index, CIPd） 0.212 0.575 -0.591 尾柄相对高度（Relative height of caudal peduncle, RHPd） -0.208 0.540 -0.467 尾柄相对宽度（Relative width of caudal peduncle, RWPd） 0.496 -0.098 -0.063 背鳍相对面积（Relative area of dorsal fin, RAD） -0.030 0.598 0.727 尾鳍相对面积（Relative area of caudal fin, RAC） 0.421 0.750 0.290 尾鳍长径比（Aspect ratio of caudal fin, ARC） 0.387 0.469 -0.399 臀鳍相对面积（Relative area of anal fin, RAA） 0.781 0.010 0.186 臀鳍长径比（Aspect ratio of anal fin, ARA） 0.186 0.444 -0.696 头部相对长度（Relative length of head, RLHd） 0.221 0.770 0.376 头部相对高度（Relative height of head, RHHd） -0.478 0.560 0.498 头部相对宽度（Relative width of head, RWHd） -0.621 0.270 -0.406 口部相对高度（Relative height of mouth, RHM） -0.304 -0.290 0.559 口部相对宽度（Relative width of mouth, RWM） -0.267 0.295 -0.485 眼相对面积（Relative area of eye, RAE） 0.861 0.207 0.301 口位（Mouth position, MP） -0.672 0.242 0.037 须存在性（Presence of barbel, Pb） -0.870 0.147 -0.140 特征值 6.66 5.57 4.47 解释方差占比（%） 26.63 22.29 17.91 累积方差占比（%） 26.63 48.92 66.83 断棒百分比（Broken-stick percentage，原文拼写为percentege） 15.26 11.26 9.26