Between September 2010 and June 2012, a total 291 (166 females and 125 males) blackchin guitarfish Glaucostegus cemiculus were captured by a commercial bottom trawler (F/V Coşkun Reis) in Iskenderun Bay, Turkey (northeastern Mediterranean Sea). The total length (L) and total weight (W) of the female and male guitarfish ranged between 32.0–165.0 cm and 88 g–16.68 kg, and 34.3–128.3 cm and 112 g–6.00 kg, respectively. Vertebral age estimates ranged from 0 to 8 years for females and 0 to 5 years for males. The growth models of von Bertanlanffy and Gompertz were fitted to the length at age data using the nonlinear regression method. Model selection was based on the values of the residual standard error and the Akaike's information criterion corrected for small sample size (AIC_C) associated with each fit. The von Bertalanffy growth model provided the best fitting growth curves for each sex with parameters reaching L_∞ = 187.17 cm, K = 0.195 year^‐1, t₀ = −1.38 year for females, and L_∞ = 144.85 cm, K = 0.321 year^‐1, t₀ = −1.13 year^‐1 for males. The W–L relationship parameters did not differ significantly between sexes, the estimated values of a and b were 0.0018 and 3.11, respectively. By using these values of a and b, and also respective estimates of L_∞, the values of W_∞ were obtained as 20.53 kg for females and 9.25 kg for males. The overall percentage ratios of females and males in the samples were 57% and 43% respectively.

中文翻译：

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来自伊斯肯德伦湾（东北地中海）的黑嘴guitar吉他鱼Glaucostegus cemiculus（1817年，Geoffroy Saint-Hilaire）的年龄和生长

2010年9月和2012年6月间，共有291（166名女性和125名男性）萨罗guitarfish Glaucostegus cemiculus由商业底拖网渔船（F / V被抓获Coşkun李嘉欣在伊斯肯德伦湾，土耳其（东北部地中海））。总长（L）和总重（W））雌性和雄性吉他鱼的范围分别为32.0–165.0 cm和88 g–16.68 kg，以及34.3–128.3 cm和112 g–6.00 kg。女性的椎骨年龄估计为0至8岁，男性的椎骨年龄估计为0至5岁。使用非线性回归方法，将冯·贝坦兰菲和贡珀兹的生长模型拟合为年龄数据的长度。模型的选择基于残差标准误差的值和针对每个拟合相关的小样本量（AIC _C）校正的Akaike信息标准。所述贝塔朗菲生长模型提供了最佳拟合的生长曲线对每个性别与参数达到大号_∞ =187.17厘米，ķ  =0.195年^-1，吨₀= -1.38年为女性，和大号_∞ =144.85厘米，ķ  =0.321年^-1，吨₀ = -1.13年^-1为男性。男女之间的W – L关系参数没有显着差异，a和b的估计值分别为0.0018和3.11。通过使用这些值一和b，并且还各自的估计大号_∞，的值w ^ _∞雌性为20.53公斤，雄性为9.25公斤。样本中女性和男性的总体百分比分别为57％和43％。