Laboratory observations on the vertical swimming behavior of Japanese common squid Todarodes pacificus paralarvae as they ascend into warm surface waters
Laboratory observations on the vertical swimming behavior of Japanese common squid Todarodes pacificus paralarvae as they ascend into warm surface waters
复制标题
日本鱿鱼 Todarodes pacificus paralarvae 上升到温暖表层水域时垂直游泳行为的实验室观察
DOI：
10.1007/s12562-014-0767-1
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发表时间：
2014
影响因子：
1.9
通讯作者：
and Y. Sakurai
中科院分区：
文献类型：
--
作者：
H. K. Yoo;J. Yamamoto;T. Saito;and Y. Sakurai
本研究考察了温暖的温度对日本普通乌贼（todarodes pacificusus）幼虫存活的影响，以及它们上升到水面时游泳行为的影响。研究人员在培养皿和85厘米高的圆柱形储罐中对幼虫进行了观察，这些储罐上层较热，下层较冷，中间隔着一个小的温跃层。通过人工受精获得幼虫，在20.9 ~ 30.4℃6种实验温度的培养皿中饲养。在较低温度下饲养的幼虫比在较高温度下饲养的幼虫存活的时间更长，在24°C以上的温度下存活率下降。当储罐上层平均温度为24.4 ~ 26.0℃时，幼虫通过温跃层上升到地表，而当上层平均温度为29.7 ~ 29.8℃时，幼虫在温跃层处停止上升。这些结果表明，幼虫有温度偏好，但在不利的温度范围内上升到地表。结果表明，产卵场地表温度的升高会对鱼类的生存和行为产生负面影响。pacificusparalarvae。
This study examined the effect of warm temperature on the survival of paralarvae of Japanese common squidTodarodes pacificusand on their swimming behavior as they ascended to the surface. Observations were conducted on paralarvae in Petri dishes and in 85-cm-tall, cylindrical tanks that had a warmer upper layer and cooler lower layer separated by a small thermocline. Paralarvae were obtained through artificial fertilization and reared in Petri dishes at six experimental temperatures between 20.9 and 30.4 °C. Paralarvae reared at lower temperatures survived longer than those reared at warmer temperatures, and survival decreased at temperatures above 24 °C. When the mean temperatures in the upper layer of the tanks were 24.4–26.0 °C, the paralarvae ascended through the thermocline to the surface, but when the mean temperatures in the upper layer were 29.7–29.8 °C, paralarvae stopped ascending at the thermocline. These results show that paralarvae have a temperature preference but ascend to the surface in the unfavorable temperature range. The results suggest that increasing surface temperatures at spawning grounds will negatively affect both the survival and behavior ofT. pacificusparalarvae.