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刘艳超, 刘书蕴, 刘海平. 西藏双须叶须鱼八种年龄鉴定材料的比较研究[J]. 水生生物学报, 2019, 43(3): 579-588. DOI: 10.7541/2019.070
引用本文: 刘艳超, 刘书蕴, 刘海平. 西藏双须叶须鱼八种年龄鉴定材料的比较研究[J]. 水生生物学报, 2019, 43(3): 579-588. DOI: 10.7541/2019.070
LIU Yan-Chao, LIU Shu-Yun, LIU Hai-Ping. VALUES OF EIGHT STRUCTURES AS AGE DETERMINATION OF PTYCHOBARBUS DIPOGON, TIBET AUTONOMOUS REGION[J]. ACTA HYDROBIOLOGICA SINICA, 2019, 43(3): 579-588. DOI: 10.7541/2019.070
Citation: LIU Yan-Chao, LIU Shu-Yun, LIU Hai-Ping. VALUES OF EIGHT STRUCTURES AS AGE DETERMINATION OF PTYCHOBARBUS DIPOGON, TIBET AUTONOMOUS REGION[J]. ACTA HYDROBIOLOGICA SINICA, 2019, 43(3): 579-588. DOI: 10.7541/2019.070

西藏双须叶须鱼八种年龄鉴定材料的比较研究

VALUES OF EIGHT STRUCTURES AS AGE DETERMINATION OF PTYCHOBARBUS DIPOGON, TIBET AUTONOMOUS REGION

  • 摘要: 用微耳石、星耳石、脊椎骨、鳃盖骨、臀鳞、胸鳞、侧线鳞和背鳞等8种年龄鉴定材料识别和鉴定西藏双须叶须鱼的年龄特征并进行比较分析, 以确定适宜的年龄鉴定材料。结果显示: 臀鳞形态特化严重, 胸鳞、侧线鳞、背鳞的年轮特征不明显, 与微耳石比较的平均百分比误差(IAPE)分别为41.63%、51.26%、50.50%和51.26%, 其他4种年龄材料与微耳石比较的IAPE相差不大, 依次为: 星耳石(12.28%)、脊椎骨(15.67%)、鳃盖骨(17.81%); 低于23龄时, 微耳石鉴定的平均年龄与耳石和脊椎骨鉴定的平均年龄较为接近(P>0.05), 分别为14.39龄、13.13龄和13.20龄, 显著高于鳃盖骨和4种鳞片(P<0.05); 高于23龄时, 7种年龄鉴定材料都显著低于微耳石所鉴定的平均年龄(P<0.05)。用微耳石鉴定所得的最大年龄为49龄, 星耳石鉴定所得的最大年龄为35龄, 脊椎骨鉴定所得最大年龄为34龄, 鳃盖骨为34龄, 臀鳞为22龄, 胸鳞为19龄, 侧线鳞为16龄, 背鳞为17龄。微耳石年龄鉴定的年龄读数与体长呈极显著的对数函数关系(P<0.01)。综合分析认为, 微耳石最适宜作为双须叶须鱼的年龄鉴定材料。

     

    Abstract: The morphology and annulus characteristics of Ptychobarbus dipogon were described by eight aging materials in Tibet Autonomous Region, China, and then the suitable aging materials were determined in term of structures and annuli characteristics of eight aging materials. Hip scale was seriously specialized, annulus characteristics of chest scale, lateral-line scale, back scale were not obvious. Compared with the lapillus, the average percentage error was 41.63% for hip scale, 51.26% for chest scale, 50.50% for lateral-line scale, and 51.26% for back scale. The average percentage errors of asteriscus (12.28%), vertebrae (15.67%), and opercular bones (17.81%) were little different from lapillus. Below 23 years old fish, the average age of lapillus was 14.39 years that was similar with asteriscus (13.13 years) and vertebrae (13.20 years), but it was significantly higher than opercular bones and four scales (P<0.05). Above 23 years old fish, the average ages of seven aging materials were significantly lower than that of lapillus (P<0.05). The maximal age was 49 years for lapillus, 35 years for asteriscus, 34 years for vertebrae, 34 years for opercular bones, 22 years for hip scale, 19 years for chest scale, 16 years lateral-line for scale, and 17 years for back scale. The relationship between the age of lapillus and body length was logarithm function (P<0.01). Therefore, the lapillus was the suitable age determination material for Ptychobarbus dipogon.

     

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