Lapilus and asteriscus can both be used for ageing and the percent agreements within the error of ? 1 annuli for annulus readings between it and lapillus were 100 % , but sagitta is not suitable for ageing because it is fragile 微耳石和星耳石可用于鑒定年齡,誤差在1輪以內(nèi)的吻合率為100 ;而矢耳石易碎。不適合鑒定年齡。
The interpretability of four kinds of ageing materials are as follows : sectioned dorsal fin spine > sectioned lapillus > scale > vertebra . sectioned dorsal fin spine is the best material in ageing of the fish less than eight years . as for the fish elder than eight years sectioned lapillus is the reliable ageing material that had more annulus readings than scale , dorsal fine spine and vertebra 對(duì)8齡以下個(gè)體,用背鰭條磨片鑒定年齡效果最佳;對(duì)8齡以上個(gè)體,臀鱗、背鰭條磨片和脊椎骨上的年輪計(jì)數(shù)明顯低于微耳石磨片,微耳石磨片上的年輪計(jì)數(shù)最高,是高齡青海湖裸鯉可靠的年齡鑒定材料。