Individuals of the same population differ in several ways. For instance, in fish populations, individuals who hatch earlier show more active behavior and are more explorative than those that hatch later, which is a characteristic of the behavioral personality type. One of the aspects relevant to this theory is the consistency of behavioral differences between contexts and over time. Thus, the present study evaluated the relationship between hatching time and behavioral consistency in two ontogenetic stages: juvenile and adult, and different contexts in zebrafish (Danio rerio). For this, the animals were separated according to hatching time into early-hatching (EH) and late-hatching (LH) fish and tested in an anxiety-like context (black-white paradigm) at the 30th-day post fertilization (dpf) and the 120th dpf. The animals were also tested in a novel tank paradigm and novel object paradigm to access explorativeness and boldness, respectively. In the black-white test, EH animals presented shorter latency to enter the white area and stayed longer in the black area than LH animals. The EH individuals were more explorative and bold in the novel tank and novel object tests and showed less anxiety-like behavior than the LH. In general, the results obtained suggest that hatching time may indicate consistent differences for zebrafish behavioral profiles.

同一群体的个体在几个方面存在差异。例如，在鱼类种群中，孵化较晚的个体表现出更积极的行为，也更具探索性，这是行为人格类型的特征。与该理论相关的一个方面是上下文之间和随着时间的推移行为差异的一致性。因此，本研究评估了两个个体发育阶段的孵化时间和行为一致性之间的关系：幼鱼和成鱼，以及斑马鱼 (Danio rerio) 的不同环境。为此，根据孵化时间将动物分为早孵化 (EH) 和晚孵化 (LH) 鱼，并在受精后第 30 天 (dpf) 在类似焦虑的环境（黑白范式）中进行测试和第 120 个 dpf。这些动物还在新的坦克范式和新的对象范式中进行了测试，以分别获得探索性和大胆性。在黑白测试中，与 LH 动物相比，EH 动物进入白色区域的潜伏期更短，在黑色区域停留的时间更长。与 LH 相比，EH 个体在新坦克和新物体测试中更具探索性和大胆性，并且表现出更少的焦虑样行为。一般来说，获得的结果表明孵化时间可能表明斑马鱼行为特征的一致差异。与 LH 相比，EH 个体在新坦克和新物体测试中更具探索性和大胆性，并且表现出更少的焦虑样行为。一般来说，获得的结果表明孵化时间可能表明斑马鱼行为特征的一致差异。与 LH 相比，EH 个体在新坦克和新物体测试中更具探索性和大胆性，并且表现出更少的焦虑样行为。一般来说，获得的结果表明孵化时间可能表明斑马鱼行为特征的一致差异。