在每次实验缸内，三椎刺鱼最终都能够捕捉相同数量的猎物。
Fish in each trial ultimately gobbled up the same Numbers of prey.
因而推测，剑尾鱼的侏儒突变是由于脊椎的发育缺陷所致，椎体异常是其体型变化的结构基础。
Therefore, the dwarf mutation in X. helleri is caused by the developmental defect in spinal column, and the vertebral malformation underlies the body type alteration anatomically.
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