School of Biomedical Sciences, The University of Queensland, St Lucia, QLD 4072, Australia.
J Fish Biol. 2009 Dec;75(10):2490-508. doi: 10.1111/j.1095-8649.2009.02435.x.
Age and growth parameters were derived for blue-spotted maskray Neotrygon kuhlii from Moreton Bay in subtropical eastern Australia. Maximum age estimates of 13 and 10 years were obtained from female (n = 76) and male (n = 44) N. kuhlii, respectively. Estimated ages at maturity for 50% of females and males were 6.32 and 3.95 years, respectively. A three-parameter power function provided the best statistical fit to size at age data in both sexes, providing parameter estimates of y(0) = 163.13, a = 58.52 and b = 0.58 for females and y(0) = 165.13, a = 59.02 and b = 0.54 in males. The two-parameter von Bertalanffy growth function was used to estimate biological parameters based on disc width (W(D)) for both female (W(Dinfinity) = 465.81 mm, K = 0.13 year(-1), b = 0.63) and male N. kuhlii (W(Dinfinity) = 385.19 mm, K = 0.20 year(-1), b = 0.54). Annual band-pair deposition was observed in three calcein-injected N. kuhlii after periods of liberty ranging from 631 to 1081 days. Centrum edge analysis indicated that annual band-pair formation was generally consistent within this population, with translucent bands formed over spring and summer and opaque bands formed in autumn and winter. Individual growth rates obtained from tagged specimens were similar to power function growth predictions. These results support previous characterizations of this common trawl by-catch species as comparatively resilient to non-targeted catches, although higher catch rates outside Australia infer a need for cautious management.
年龄和生长参数是从澳大利亚亚热带东部的莫顿湾的蓝斑蒙面鱼 Neotrygon kuhlii 中得出的。从 76 条雌性和 44 条雄性 N. kuhlii 中分别获得了 13 年和 10 年的最大年龄估计值。估计 50%的雌性和雄性的成熟年龄分别为 6.32 年和 3.95 年。在两性中，三次幂函数为年龄与大小数据提供了最佳的统计拟合，其参数估计值为雌性的 y(0) = 163.13、a = 58.52 和 b = 0.58，雄性的 y(0) = 165.13、a = 59.02 和 b = 0.54。基于圆盘宽度（W(D)），使用二参数 von Bertalanffy 生长函数来估计雌性（W(Dinfinity) = 465.81 mm、K = 0.13 年(-1)、b = 0.63）和雄性 N. kuhlii（W(Dinfinity) = 385.19 mm、K = 0.20 年(-1)、b = 0.54）的生物学参数。在 liberty 期为 631 至 1081 天的 3 条注入钙黄绿素的 N. kuhlii 中观察到了每年一对的带纹沉积。中心边缘分析表明，该种群内每年的带纹形成通常是一致的，透明带在春季和夏季形成，不透明带在秋季和冬季形成。从标记标本中获得的个体生长率与幂函数生长预测相似。这些结果支持了以前对这种常见拖网副渔获物的特征描述，即相对能够承受非目标捕捞，但在澳大利亚以外的更高捕捞率表明需要谨慎管理。
