Zimmerman AM, Lowery MS
University of San Diego, San Diego, California 92110, USA.
J Exp Zool. 1999 Aug 1;284(3):299-308. doi: 10.1002/(sici)1097-010x(19990801)284:3<299::aid-jez7>3.0.co;2-6.
Because skeletal muscle is the main contributor to body weight in most fish, it is probable that the size of a fish is limited by the growth of this tissue. Several aspects of both somatic size and skeletal muscle growth were investigated in white seabass (Atractoscion nobilis). One hundred and four subjects ranging in size from 1.3-91.8 cm standard length were examined to discern growth patterns throughout the entire life span of this species. Relationships of somatic growth were evaluated by weight, length, and age comparisons while muscle growth was assessed from cross-sectional area measurements of white muscle fibers. The average cross-sectional fiber area increased from approximately 150 &mgr;m(2) to 4300 &mgr;m(2) as the fish increased in size, indicating that hypertrophy plays an important role in growth. Hyperplastic fiber recruitment accounted for approximately 93% of muscle growth in recently hatched fish and gradually decreased with fish length. Although the contribution of hyperplasia declined to less than 1% in the largest subject, the persistence of hyperplasia at standard lengths equal to or greater than 91.8 cm as observed in the white seabass has yet to be documented in other fish species. This sustained fiber recruitment may be responsible for the impressive ultimate standard length of 133 cm (41 kg) that white seabass are capable of attaining. The white seabass currently represents the largest marine fish species for which the dynamics of muscle fiber growth have been described. J. Exp. Zool. 284:299-308, 1999. Copyright 1999 Wiley-Liss, Inc.
由于骨骼肌是大多数鱼类体重的主要组成部分，鱼类的大小很可能受到该组织生长的限制。研究了白鲈（Atractoscion nobilis）的体型大小和骨骼肌生长的几个方面。检查了104个标准长度从1.3 - 91.8厘米不等的个体，以了解该物种整个生命周期的生长模式。通过体重、长度和年龄比较评估体型生长关系，同时从白肌纤维的横截面积测量评估肌肉生长。随着鱼体增大，平均横截面积纤维面积从约150μm²增加到4300μm²，表明肥大在生长中起重要作用。增生性纤维募集在刚孵化的鱼中约占肌肉生长的93%，并随鱼的长度逐渐减少。尽管在最大的个体中增生的贡献降至不到1%，但在白鲈中观察到的标准长度等于或大于91.8厘米时增生的持续性在其他鱼类物种中尚未有记录。这种持续的纤维募集可能是白鲈能够达到令人印象深刻的最终标准长度133厘米（41千克）的原因。白鲈目前是已描述肌肉纤维生长动态的最大海洋鱼类物种。《实验动物学杂志》284:299 - 308, 1999。版权所有1999威利 - 利斯公司。
