This study described the morphology and annulus characteristics , and analyzed the consistency of age interpre -tations from four hard tissues (lapillus, scale, cleithrum, operculum) for age determination of common bream Abramis brama in Ulungur Lake, in Xinjiang Uigur Autonomous Region , China.The agreement of age readings between two times by the same reader on the cross-sectioned lapillus is the highest (90.5%, n =221), followed by the plane sectioned la-pillus (84.5%, n =171), cleithrum (83.7%, n =178), operculum (80.7%, n =176).And scales have the lowest agreement of age readings (74.2%, n =221).The agreement of age readings between the cross -sectioned lapilla and plane sectioned lapilla is the highest (83.6%, n =110).The next is the agreement between the cross -sectioned lapilla and cleithra (71.2%, n =73) and the following is that between the cross -sectioned lapilla and scales (62.4%, n =101).The opercula have the lowest agreement (30.0%, n =73) with the cross-sectioned lapilla.So, cleithra, scales and opercula may underestimate the ages of elderly individuals .In short, the lapillus is the best age determination materi -al, and the cross-section method is more appropriate.Scales, cleithra and opercula are not suitable for determining the a -ges of older individuals of common bream .%对新疆乌伦古湖欧鳊（Abramis brama）耳石、鳞片、匙骨、鳃盖骨等四种年龄鉴定材料的形态和年龄特征进行了描述，并对其年龄读数的一致性进行了比较分析。结果显示：3龄以下个体鳞片年轮标志多为普通切割型，3龄以后年轮显示为碎裂切割和疏密切割，高龄个体鳞片外围有年轮缺失的现象；微耳石磨片在透射光下呈明暗相间的轮纹；匙骨中心区域透明，年轮不清晰，外侧年轮清晰，但高龄个体外侧有年轮缺失的现象；鳃盖骨中心部分较厚，年轮不易观察。同一观察者2次读龄年龄读数吻合率中，耳石横轴面磨片最高，为90.5％；耳石平面磨片、匙骨、鳃盖骨次之，分别为84.5％、83.7％、80.7％；鳞片最低，为74.2％。以耳石横轴面磨片年龄读数为基准，耳石平面磨片年龄读数与其吻合率较高，为83.6％，平均变异系数为1.5％；匙骨、鳞片次之，分别为71.2％、62.4％，平均变异系数分别为5.1％、4.3％；鳃盖骨最低，仅为30.0％，平均变异系数为13.8％。综合分析认为，耳石是乌伦古湖欧鳊年龄鉴定的最适宜材料，高龄个体采用其横轴面磨片观察更为精确。鳞片、匙骨和鳃盖骨在鉴定低龄个体年龄时可使用，但鉴定高龄个体年龄时，有低估年龄的可能。
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