High-temperature and starvation tolerances of juvenile Japanese Spanish mackerel Scomberomorus niphonius

Harada Kaito

Morita Tetsuo

Deguchi Wataru

Yamamoto Masayuki

Fujita Tomonari

Tomiyama Takeshi

Fisheries Science

Japanese Spanish mackerel Scomberomorus niphonius is 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.

Coastal habitat

Global warming

Starvation mortality

Stock enhancement

Temperature tolerance

英語

Springer

© Japanese Society of Fisheries Science 2021

This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/s12562-021-01521-w

This is not the published version. Please cite only the published version. この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。

[ISSN] 0919-9268

[ISSN] 1444-2906

[DOI] 10.1007/s12562-021-01521-w

[DOI] https://doi.org/10.1007/s12562-021-01521-w