Tuset Victor M, Imondi Ralph, Aguado Guillermo, Otero-Ferrer José L, Santschi Linda, Lombarte Antoni, Love Milton
Institute of Marine Sciences (ICM-CSIC), Passeig Marítim 37-49, 08003, Barcelona, Catalonia, Spain.
J Morphol. 2015 Apr;276(4):458-69. doi: 10.1002/jmor.20353. Epub 2014 Dec 15.
Sagitta otolith shape was analysed in twenty sympatric rockfishes off the southern California coast (Northeastern Pacific). The variation in shape was quantified using canonical variate analysis based on fifth wavelet function decomposition of otolith contour. We selected wavelets because this representation allow the identifications of zones or single morphological points along the contour. The entire otoliths along with four subsections (anterior, ventral, posterodorsal, and anterodorsal) with morphological meaning were examined. Multivariate analyses (MANOVA) showed significant differences in the contours of whole otolith morphology and corresponding subsection among rockfishes. Four patterns were found: fusiform, oblong, and two types of elliptic. A redundancy analysis indicated that anterior and anterodorsal subsections contribute most to define the entire otolith shape. Complementarily, the eco-morphological study indicated that the depth distribution and strategies for capture prey were correlated to otolith shape, especially with the anterodorsal zone.
对南加州海岸（东北太平洋）的20种同域石鱼的矢耳石形状进行了分析。基于耳石轮廓的第五小波函数分解，使用典型变量分析对形状变化进行了量化。我们选择小波是因为这种表示方式能够识别轮廓上的区域或单个形态点。研究了整个耳石以及具有形态学意义的四个子部分（前部、腹侧、后背部和前背部）。多变量分析（MANOVA）表明，石鱼的整个耳石形态轮廓和相应子部分存在显著差异。发现了四种模式：梭形、长方形和两种椭圆形。冗余分析表明，前部和前背部子部分对定义整个耳石形状的贡献最大。此外，生态形态学研究表明，深度分布和捕食策略与耳石形状相关，尤其是与前背部区域相关。
