Age and growth characteristics of Schizopygopsis younghusbandi Regan, 1905 in the Yarlung Tsangpo River in Tibet, China
Age and growth characteristics of Schizopygopsis younghusbandi Regan, 1905 in the Yarlung Tsangpo River in Tibet, China
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DOI：
10.1111/jai.12439
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发表时间：
2014-10-01
影响因子：
0.9
通讯作者：
Huo, B.
中科院分区：
文献类型：
--
作者：
Duan, Y. -J.;Xie, C. -X.;Huo, B.
为了更好地了解裂尻鱼Schizopygopsis schizhusbandi Regan，1905的生物学特性及其与管理的关系，本研究描述了裂尻鱼耳石大小与体长和年龄的关系，验证了耳石环形成的年周期性，并估算了裂尻鱼的S.生长参数。这些年龄和生长特征进行了研究，使用694个标本从2008年8月至2009年8月收集。耳石生长不对称的标准长度（SL）的研究范围内，显示出一个清晰的模式交替半透明和不透明的带。边缘生长率（MIR）分析的标本，直到6岁，表明一个不透明带和一个半透明带，每年奠定。观察到的最大年龄为17岁，对应于35.8 cm SL和589.1 g体重（BW）的雌性动物。SL-BW关系为：对于合并的性别，描述为BW = 1.122 x 10（-5）SL3.030。使用von Bertalanffy生长函数将反算长度建模为L-t = 338.4（1-e（-0.233）（（t +0.403）（雄性）和L-t = 433.9（1-e（-0.194）（（t +0.397）（雌性）。S.与同一河流中的其他裂腹鱼类相比，该科鱼类的平均体重相对较高。
To better understand the biology of Schizopygopsis younghusbandi Regan, 1905 and its relationship with management considerations, this study describes the relationships between otolith size and fish length and age, verifies annual periodicity of otolith annulus formation, and estimates the S. younghusbandi growth parameters. These age and growth characteristics were studied using 694 specimens collected from August 2008 to August 2009. Otoliths grew asymmetrically throughout the range of standard length (SL) studied, showing a clear pattern of alternating translucent and opaque bands. Marginal increment ration (MIR) analysis of specimens up to 6 years of age indicated that one opaque band and one translucent band were laid down each year. Maximum observed age was 17 years, corresponding to a female of 35.8 cm SL and 589.1 g body weight (BW). The SL-BW relationship was ;described as BW = 1.122 x 10(-5) SL3.030 for sexes combined. The von Bertalanffy growth function was used to model back-calculated lengths as L-t = 338.4 (1-e(-0.233) ((t + 0.403))) for males, and L-t = 433.9 (1-e(-0.194) ((t + 0.397))) for females. Growth performance of S. younghusbandi was relatively higher than those of other Schizothoracinaes inhabiting the same river.