Welch Aaron, Hoenig Ronald, Stieglitz John, Daugherty Zach, Sardenberg Bruno, Miralao Sasa, Farkas Dan, Benetti Dan
University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149 USA.
Springerplus. 2013 Nov 25;2:634. doi: 10.1186/2193-1801-2-634. eCollection 2013.
Growth rates of larval and juvenile bigeye scad Selar crumenophthalmus reared in captivity were studied. The results are presented, discussed, and compared to wild S. crumenophthalmus and other pelagic fish. S. crumenophthalmus are a small pelagic carangid fish of circumtropical distribution. Larvae were reared in a modified mesocosm system and sampled daily for growth. Larvae grew to a mean size of 4.74 cm (Standard Length) and 1.30 g by 45 days post hatch (dph). Larval length-at-age was best described by the exponential equation Y = 1.966e(0.0704t) . For juvenile growth trials, 1940 fish were stocked into four 2.5 m(3) cylindro-conical tanks at two different densities (262 fish m(-3) and 120 fish m(-3)) and reared from 45 dph to subadult stage. Fish were sampled daily for growth. No statistically significant differences in growth or survival were detected between tanks. Mean length and weight at 141 dph was 13.24 cm (Total Length) and 25.20 g. Juvenile length-at-age was best described by the Von Bertalanffy Growth Model equation L t = 27.75(1 - e(-0.03(t-1.57))). Weight-at-age was best described by a linear equation W t = 1.7313x + 12.4662. The exponent of the length-weight equation was 3.14. In addition to providing the first published description of larviculture and juvenile growout techniques for S. crumenophthalmus, this study contains the first published data on this species' larval growth and directly confirms estimates of S. crumenophthalmus juvenile growth done by other researchers using indirect techniques such as otolith daily growth increment and frequency distribution analysis.
研究了圈养条件下大眼鲹（Selar crumenophthalmus）幼体和幼鱼的生长速率。现将结果呈现、讨论并与野生大眼鲹及其他中上层鱼类进行比较。大眼鲹是一种分布于热带海域的小型中上层鲹科鱼类。幼体在改良的中宇宙系统中饲养，每天取样以监测生长情况。孵化后45天（dph）时，幼体平均体长达到4.74厘米（标准体长），体重为1.30克。幼体体长与年龄的关系最适合用指数方程Y = 1.966e(0.0704t)来描述。在幼鱼生长试验中，1940尾鱼被放养到四个2.5立方米的圆柱 - 圆锥形容器中，密度分别为两种（262尾/立方米和120尾/立方米），并从45 dph饲养至亚成体阶段。每天对鱼进行取样以监测生长情况。各容器之间在生长或存活方面未检测到统计学上的显著差异。141 dph时的平均体长和体重分别为13.24厘米（全长）和25.20克。幼鱼体长与年龄的关系最适合用冯·贝塔朗菲生长模型方程Lt = 27.75(1 - e(-0.03(t - 1.57)))来描述。体重与年龄的关系最适合用线性方程Wt = 1.7313x + 12.4662来描述。体长 - 体重方程的指数为3.14。除了首次发表大眼鲹幼体培育和幼鱼养成技术的描述外，本研究还包含了该物种幼体生长的首次发表数据，并直接证实了其他研究人员使用耳石每日生长增量和频率分布分析等间接技术对大眼鲹幼鱼生长的估计。
