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Effects of water temperature and salinity on feeding and growth of immature Japanese lates Lates japonicus

Journal of National Fisheries University Volume 70 Issue 1 Page 27-34
published_at 2021-10
70-1-27-34.pdf
[fulltext] 675 KB
Title
水温と塩分がアカメ未成魚の摂餌と成長に及ぼす影響
Effects of water temperature and salinity on feeding and growth of immature Japanese lates Lates japonicus
Abstract
The Japanese lates, Lates japonicus is an endemic fish to the Pacific coast of southern Japan, and commonly found in estuaries and coastal waters of Miyazaki and Kochi Prefectures. The larvae, juveniles and young fish stay in the eelgrass, Zostera japonica beds in brackish water areas. Effects of water temperature and salinity on feeding and growth of immature L. japonicus were studied using combinations of seven levels of temperatures (16 to 28℃) and 6 different salinities (9 to 34 ppt) over two experimental periods each of 30 days. At each of these conditions, ten fish were reared in aquaria for periods of 30 days. Based on values of the daily feeding rates, specific growth rates and feeding efficiencies, we found that immature L. japonicus were euryhaline and at salinities ranged from 9 to 34 ppt showed similar feeding and growth rates. The suitable water temperature range was 22 to 28℃, and the optimal water temperature range was 26 to 28℃ for feeding and growth for immature L. japonicus.
Creators Takeshita Naohiko
Creators Kondou Takuya
Creators Ikeda Itaru
Creators Takahashi Hiroshi
Creators Nagata Shingo
Creators Hoshino Kazuo
Source Identifiers
Creator Keywords
Japanese lates Lates japonicus Water temperature Salinity Feeding Growth
Languages jpn
Resource Type departmental bulletin paper
Publishers National Fisheries University
Date Issued 2021-10
File Version Version of Record
Access Rights open access
Relations
[ISSN]0370-9361