CAJ | 학술논문

　　2009—2012年于陕西省陇县秦岭细鳞鲑(Brachymystax lenok tsinlingensis)国家级自然保护区内采集秦岭细鳞鲑样本397尾。以鳞片为年龄鉴定材料,显微镜下观察发现,秦岭细鳞鲑鳞片上的年轮特征主要表现为普通切割形；研究样本的年龄共分为5个年龄组,其中以1～3龄为主,约占85.64%；体长(L, mm)和鳞径(R, mm)具有显著的相关性(L=?5.83R2+208.06R +34.99, r2=0.88)； Von Bertalanffy 生长方程分别为： Lt=729.38[1?e?0.08(t+0.5)], Wt=6288.74[1?e?0.08(t+0.5)]2.9681,雌雄个体的生长速率无显著差异；生长系数为0.08,拐点年龄为13.10龄,对应的的体长和体质量分别为483.66 mm和1857.86 g。结论认为,秦岭细鳞属生长缓慢型鱼类,在所调查的保护区中秦岭细鳞鲑显现出个体小型化趋势。在制定资源保护策略时,应考虑采取人工增殖放流措施来扩大自然种群数量,增强种群的自然调节能力,恢复种群数量。本研究旨在了解秦岭细鳞鲑的生长规律,为秦岭细鳞鲑的资源保护与合理利用提供理论指导。
　　2009—2012년우합서성롱현진령세린해(Brachymystax lenok tsinlingensis)국가급자연보호구내채집진령세린해양본397미。이린편위년령감정재료,현미경하관찰발현,진령세린해린편상적년륜특정주요표현위보통절할형；연구양본적년령공분위5개년령조,기중이1～3령위주,약점85.64%；체장(L, mm)화린경(R, mm)구유현저적상관성(L=?5.83R2+208.06R +34.99, r2=0.88)； Von Bertalanffy 생장방정분별위： Lt=729.38[1?e?0.08(t+0.5)], Wt=6288.74[1?e?0.08(t+0.5)]2.9681,자웅개체적생장속솔무현저차이；생장계수위0.08,괴점년령위13.10령,대응적적체장화체질량분별위483.66 mm화1857.86 g。결론인위,진령세린속생장완만형어류,재소조사적보호구중진령세린해현현출개체소형화추세。재제정자원보호책략시,응고필채취인공증식방류조시래확대자연충군수량,증강충군적자연조절능력,회복충군수량。본연구지재료해진령세린해적생장규률,위진령세린해적자원보호여합리이용제공이론지도。
We evaluated the age structure and growth characteristics of Brachymystax lenok tsinlingensis based on scale analysis. We collected 397 B. lenok tsinlingensis specimens from Long-xian, Shanxi, between 2009 and 2012. The scale annuli were characterized as the commonly-cutting shape. We observed 5 age groups, with 1?3 year-old individuals accounting for 85.64%of the total samples. There was no significant difference in body length (L) and body weight (W) between females and males and the Von Bertalanffy growth model was Lt=729.38[1?e?0.08(t+0.5)] and Wt=6 288.74[1?e?0.08(t+0.5)]2.968 1. The coefficient of growth (k) was 0.08. The body weight growth inflexion point was at 13.10 years old, with a corresponding body length of 483.66 mm and body weight of 1 857.86 g. The results show that B. lenok tsinlingensis is a species of slow growing fish and it characterizes isometric growth and individual miniaturization in the natural reserve. We should take artificial propagation and artificial releasing to enlarge and revive its populations. The study is intended to realize its growth rhythm and take reasonable actions to protect and vitalize B. lenok tsinlingensis.