http://scholars.ntou.edu.tw/handle/123456789/14478
標題: | Salinity adaptation and subsidence attributes in the early stages of Japanese eel (Anguilla japonica) | 作者: | Su-Lean Chang Guang-Hsiung Kou I-Chiu Liao |
公開日期: | 一月-2003 | 出版社: | Acta Zoologica Taiwanica | 卷: | 14 | 期: | 1 | 起(迄)頁: | pp.33-44 | 摘要: | The tolerance of Japanese eel (Anguilla japonica) embryos to abrupt changes in salinity and their effect on subsidence and survival of yolk-sac larvae were investigated. Results show that the survival of normal and eye-pigmented larvae were significantly higher after transferring the embryos from 30 ppt to 25 and 30 ppt compared to the other salinity treatments tested. C- shaped embryos showed stronger ability to overcome changes in salinities than did morula embryos. The subsidence of yolk-sac larvae was positively correlated with age and the decrease in salinity. Most larvae in 30-ppt water moved to the lower water layer or lay on the bottom from 2 days old, while in the 20-ppt group, almost all larvae from 1 day old sank to the lower layer or lay on the bottom. The survival rate of eye-pigmented larvae was significantly higher at 30 ppt compared to other salinity levels in the experimental trial on larval subsidence. Moreover, decreases in survival of yolk-sac larvae were significantly affected by the presence of copepods and the bottom substrate (sand and silt). |
描述: | Salinity Adaptation and Subsidence Attributes in the Early Stages of Japanese Eel (Anguilla japonica). Available from:https://www.researchgate.net/publication/238666953_Salinity_Adaptation_and_Subsidence_Attributes_in_the_Early_Stages_of_Japanese_Eel_Anguilla_japonica [accessed Dec 27 2017]. |
URI: | http://ntour.ntou.edu.tw:8080/ir/handle/987654321/45060 http://scholars.ntou.edu.tw/handle/123456789/14478 |
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