Using landmark-based geometric morphometrics analysis to identify sagittal otolith of four Pennahia fish species

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Using landmark-based geometric morphometrics analysis to identify sagittal otolith of four Pennahia fish species
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Affiliation:1. Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China;2. Centers of Fisheries Resources Monitoring and Assessment, South China Sea, Guangdong Ocean University,
Clc Number:Q179.3; S93
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investigated in sagittal otoliths using landmark-based method among four sympatric speciesPennahia: =50), =49) and .The Beibu Gulf from April 2010 to October 2010. Landmark coordinate values were extracted after otolith digitized by image processing and relative warp principal component (RW), thin plate spline analysis and grad distortion. The 12 RW were then identified using discrimination analysis to differentiate the otoliths of fourspecies. RW accounted forlandmarks 5 and 8 had important contributions, and could explain the most variation. The most morphological variation were displayed in neck, head width pole, and tail of tadpole-shaped sulcus. The gradual discrimination analysis and cross validation indicated that , average exactitude distinguish ratios of 81.6%~100%, while indicating that it contained a potential risk by using the morphology of tadpole-shaped impression owned by species. It is necessary to notice this problem in the related otolith morphology research and application in feeding ecology.

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侯刚,刘丹丹,冯波,卢伙胜. 基于地标点几何形态测量法识别北部湾4种白姑鱼矢耳石形态[J]. Jounal of Fishery Sciences of China, 2013,[volume_no](6):1293-1302

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Online: November 29,2013
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