Gómez-Márquez José Luis, Peña-Mendoza Bertha, Salgado-Ugarte Isaías H, José Luis Arredondo-Figueroa
Laboratorio de Limnología, F.E.S. Zaragoza, U.N.A.M. Av. 5 de Mayo y Fuerte de Loreto, Col. Ejercito de Oriente, Iztapalapa, C.P. 09230, DF México.
Rev Biol Trop. 2008 Jun;56(2):875-84. doi: 10.15517/rbt.v56i2.5630.
Age and growth of Nile tilapia (Oreochromis niloticus) were determined using 1039 specimens collected in a tropical shallow lake of Mexico, from January to December 1993. Standard length of females ranged from 9.0 to 16.5 cm and males from 8.9 to 14.8 cm. The standard length-weight relationships for all individuals was BW=0.1207 SL2469. The age data, derived from opercular bone readings, were used to estimate the growth parameters of the von Bertalanffy equation: Lx=17.88 cm, K=0.3409, t0=-1.543, and Winfinity=149.21 g. The oldest male and female were 2.5 years old. The sex ratio (female:male) was of 1:1 (chi2=0.02, p>0.05).
利用1993年1月至12月在墨西哥一个热带浅水湖泊采集的1039个样本，测定了尼罗罗非鱼（Oreochromis niloticus）的年龄和生长情况。雌鱼的标准长度为9.0至16.5厘米，雄鱼为8.9至14.8厘米。所有个体的标准长度-重量关系为BW = 0.1207SL2469。从鳃盖骨读数得出的年龄数据用于估计冯·贝塔朗菲方程的生长参数：Lx = 17.88厘米，K = 0.3409，t0 = -1.543，以及W∞ = 149.21克。最年长的雄鱼和雌鱼为2.5岁。性别比（雌:雄）为1:1（卡方 = 0.02，p>0.05）。
