| 广东东江外来尼罗罗非鱼年轮特征及其影响因素 |
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| 引用本文： | 张鹏飞,林小涛,孙军,陈国柱,何耀升,徐采,王彦霏.广东东江外来尼罗罗非鱼年轮特征及其影响因素[J].中国水产科学,2012,19(3):416-422. |
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| 作者姓名： | 张鹏飞 林小涛 孙军 陈国柱 何耀升 徐采 王彦霏 |
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| 作者单位： | 暨南大学水生生物研究所热带亚热带水生态工程教育部工程研究中心,广东广州,510632 |
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| 摘 要： | 以养殖群体为对照,研究了广东东江外来尼罗罗非鱼(Oreochromis niloticus)鳞片、腹鳍棘、鳃盖骨、脊椎骨和矢耳石5种年龄材料的年轮结构特征。与养殖群体相比,整体上东江种群年轮的清晰度及对比度更高。结合周年水温数据,推测东江尼罗罗非鱼在1 3月份低温期形成1个年轮标志,而其副轮较多的特征可能与繁殖活动有关。在5种年龄材料中,以矢耳石的轮纹特征最为明显,且规律性强,而鳃盖骨和鳞片受副轮影响,可读性最低。5种年龄材料的可读性由大到小顺序为矢耳石、脊椎骨、腹鳍棘、鳃盖骨、鳞片。
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| 关 键 词： | 东江 尼罗罗非鱼 年轮特征 水温 繁殖 |
| 修稿时间： | 2012/5/15 0:00:00 |
Annuli and age-related factors of the alien species Nile tilapia (Oreochromis niloticus) in Dongjiang River, Guangdong Province |
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| ZHANG Pengfei,LIN Xiaotao,SUN Jun,CHEN Guozhu,HE Yaosheng,XU Cai,WANG Yanfei.Annuli and age-related factors of the alien species Nile tilapia (Oreochromis niloticus) in Dongjiang River, Guangdong Province[J].Journal of Fishery Sciences of China,2012,19(3):416-422. |
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| Authors: | ZHANG Pengfei LIN Xiaotao SUN Jun CHEN Guozhu HE Yaosheng XU Cai WANG Yanfei |
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| Institution: | Institute of Hydrobiology,Jinan University,Engineering Research Center of Tropical and Subtropical Aquatic Ecological En-gineering,Ministry of Education,Guangzhou 510632,China. |
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| Abstract: | Annuli of the alien species Oreochromis niloticus in Dongjiang River,Guangdong Province were inves-tigated by analyzing optical macrozones in scales,pelvic fin spines,preopercular bones,vertebrae and sagittae from fish sampled during 2010,and were compared with cultured populations.The annual rings in wild individu-als were clearer and of higher contrast than those in cultured individuals.Examination of annuli at the edge of the analyzed materials suggested that annual rings are formed each year during January and March,which coincides with minimum water temperature.The presence of various pseudoannuli in addition to the annual rings may be associated with reproductive activities of the fish.The annual rings in the sagittae were clearer and more regular than those in other materials examined.Because of the presence of pseudoannuli,the annual rings in the preoper-cular bone and scales were more difficult to analyze than in other materials.Thus,the suitability of material for analysis of age in O.niloticus were ranked: sagitta > vertebra > sectioned ventral fin spine > preopercular bone ≥ scale. |
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| Keywords: | Oreochromis niloticus characters of annual rings Dongjiang River water temperature reproduction |
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