High-temperature and starvation tolerances of juvenile Japanese Spanish mackerel Scomberomorus niphonius
High-temperature and starvation tolerances of juvenile Japanese Spanish mackerel Scomberomorus niphonius
复制标题
日本鲭鱼幼鱼的高温和饥饿耐受性
DOI：
10.1007/s12562-021-01521-w
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发表时间：
2021
影响因子：
1.9
通讯作者：
Tomiyama Takeshi
中科院分区：
文献类型：
--
作者：
Harada Kaito;Morita Tetsuo;Deguchi Wataru;Yamamoto Masayuki;Fujita Tomonari;Tomiyama Takeshi
日本鲭鱼Scomberomorus niphoniusis是放养的目标物种，但其幼鱼阶段的生物学特性尚不清楚。在这里，我们研究了圈养孵化场饲养的幼鱼对高温和饥饿的耐受力。我们使用标准长度约为 40 毫米的幼鱼，这是释放到野外的幼鱼的大小。初期致死温度上限（50%致死水温）估计为 31.8°C，高于现场最高海面温度（约 29°C）。幼鱼的临界最高温度为34.8℃，而幼鱼初步适应31℃24小时时的临界最高温度为36.1℃。在 20°C 的非摄食条件下，幼鱼会在 3 至 11 天内死亡，但在 27°C 的条件下，会在 2 至 7 天内死亡。该信息预计将有助于日本鲭鱼幼鱼生产的发展。
Japanese Spanish mackerelScomberomorus niphoniusis a target species for stocking, but its biological characteristics at the juvenile stage are not well understood. Here, we investigated the high-temperature and starvation tolerances of hatchery-reared juveniles in captivity. We used juveniles of approximately 40 mm standard length, the size of juveniles released into the field. The upper incipient lethal temperature (50% lethal water temperature) was estimated to be 31.8 °C, higher than the maximum sea surface temperature in the field (approximately 29 °C). The critical thermal maximum was 34.8 °C, whereas it was 36.1 °C when juveniles were preliminarily acclimated to 31 °C for 24 h. Juveniles died from 3 to 11 days under nonfeeding conditions at 20 °C, but from 2 to 7 days at 27 °C. This information is expected to contribute to the development of the production of juvenile Japanese Spanish mackerel.