It is important to study the fitness of marine invertebrates in exposure to high temperature. We studied whether the long-term high temperatures work on the fitness-related traits (righting behavior, covering behavior, foraging behavior, Aristotle’s lantern reflex, body size) of S. intermedius whose parents (males and females) were exposed to ambient or high temperatures (∼3 °C higher than the ambient) for a long period of time. The present study found that test diameter, wet body weight and test weight of offspring were not significantly different between temperature treatments, indicating that the parental sea urchins in exposure to high temperatures develop no carryover effects on the body size of the offspring sea urchins. We found no significant difference in foraging behavior, Aristotle’s lantern reflex, lantern length and lantern weight of sea urchins after their parents had experienced long-term high temperatures. In addition, no significant change was found in the righting and covering behaviors of sea urchins whose parents were at long-term high temperatures. These results indicate that no significant lasting effects exhibited in the fitness-related behaviors and tissue size after their parents were exposed to high temperatures for a long time. The crushing force of test and test thickness showed no significant difference in the offspring of S. intermedius, no matter whether their parents were exposed to long-term high temperatures or not. The current results enrich our understanding that the parental sea urchin experiencing long-term high temperatures probably develop no carryover effects on the test of their offspring. We found that sea urchins whose parents were exposed to long-term elevated temperatures showed a significantly higher lantern length/test diameter and a significantly lower test height/test diameter in offspring sea urchins due to the thermal experience of their parents, showing the plasticity of lantern and test of offspring sea urchins in response to the thermal experience of their parents. Together with our previous investigation, the present study indicates that small sea urchins are less susceptible to the carryover effects of high temperatures in comparison with the developmental stages of embryos and larvae.

研究海洋无脊椎动物在高温下的适应性很重要。我们研究了长期高温是否对S的健身相关性状（扶正行为，覆盖行为，觅食行为，亚里士多德的灯笼反射，体型）起作用。中间人其父母（雄性和雌性）长时间暴露于环境或高温（比环境高约3°C）中。本研究发现，温度处理后代的测试直径，湿体重和后代测试重量没有显着差异，这表明暴露于高温下的父母海胆对后代海胆的体型没有任何残留影响。在父母经历长期高温之后，我们发现觅食行为，亚里士多德的灯笼反射，灯笼长度和海胆的灯笼重量没有显着差异。此外，父母长期处于高温状态的海胆的扶正和掩盖行为没有发现显着变化。这些结果表明，他们的父母长时间暴露在高温下，与健身相关的行为和组织大小没有明显的持久作用。试验的压碎力和试验的厚度在子代的后代中没有显着差异。小号。中间人，无论其父母是否长期处于高温下。目前的结果丰富了我们的理解，即经历长期高温的父母海胆可能不会对其后代的测试产生任何残留影响。我们发现，由于父母的热经验，其父母长期处于高温下的海胆在后代海胆中表现出明显更高的灯笼长度/测试直径和明显更低的测试高度/测试直径，显示出它们的可塑性。灯笼和后代海胆的测试，以响应其父母的散热经验。加上我们之前的调查，