中国水产科学2012，Vol.19Issue(3)：416-422,7.DOI:10.3724/SP.J.1118.2012.00416
广东东江外来尼罗罗非鱼年轮特征及其影响因素
Annuli and age-related factors of the alien species Nile tilapia (Oreochromis niloticus) in Dongjiang River, Guangdong Province
摘要
Abstract
Annuli of the alien species Oreochromis niloticus in Dongjiang River, Guangdong Province were investigated by analyzing optical maerozones 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 individuals 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 preopercular 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.关键词
东江/尼罗罗非鱼/年轮特征/水温/繁殖Key words
Oreochromis niloticus/ characters of annual rings/ Dongjiang River/ water temperature/ reproduction分类
农业科技引用本文复制引用
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):416-422,7.基金项目
国家科技重大专项项目(2009ZX07211-009). （2009ZX07211-009）
