Allometry, a growth pattern in which different parts of an organism grow at defined rates, is a common feature of fish and can be influenced by environmental factors. The rare minnow Gobiocypris rarus Ye et Fu, 1983 undergoes allometric growth, and this study investigated its allometry patterns and assessed whether the culture environment affects them by comparing growth patterns in conventional (CV) and specific pathogen-free (SPF) stocks using 14 morphological characters. A U-shaped pattern of allometric growth was found in both groups, characterized by higher growth rates of the head and caudal regions than the trunk region. Although the overall allometric growth pattern was similar between these two inbred groups of rare minnows, allometric coefficients for morphometric characters before inflection were higher for SPF fish than CV fish. Growth rates of total length and body mass were also higher for SPF than CV individuals. These results indicate that the environment does play a vital role in rare minnow growth and development, and that a clean culture environment and a U-shaped pattern of allometric growth are highly beneficial for its early growth.

中文翻译：

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两种养殖环境下稀有鲦鱼（Gobiocypris rarus）异速生长的比较

异速生长是一种生长模式，其中生物体的不同部分以规定的速度生长，是鱼类的一个共同特征，可能会受到环境因素的影响。稀有的鲦鱼 Gobiocypris rarus Ye et Fu, 1983 经历异速生长，本研究调查了其异速生长模式，并通过使用 14 种形态学比较常规 (CV) 和特定无病原体 (SPF) 种群的生长模式来评估培养环境是否影响它们人物。在两组中都发现了 U 形异速生长模式，其特征是头部和尾部区域的增长率高于躯干区域。尽管这两个稀有小鱼近交组的整体异速生长模式相似，但 SPF 鱼的变形前形态特征的异速生长系数高于 CV 鱼。SPF 个体的总长度和体重的增长率也高于 CV 个体。这些结果表明，环境确实在稀有鲦鱼的生长发育中起着至关重要的作用，清洁的养殖环境和异速生长的 U 型模式对其早期生长非常有利。