EVALUATION OF ESTUARINE HUMAN IMPACT ON FISH LARVA HABITAT IN POINT OF PHYSIOLOGICAL CONDITION

• OHTUSKI Kazuaki

  Depertment of Civil Engineering, Tokyo University of Science, Japan

• SHIMATANI Yukihiro

  Faculty of Engineering, Department of Urban and Environmental Engineering, Kyushu University, Japan

Bibliographic Information

Other Title

• 河口域の人為改変に伴うリュウキュウアユ仔稚魚の生理的生息条件に対する影響評価

Abstract

Our target species, Ryukyu-Ayu (Plecoglossus altivelis ryukyuensis) are thought that they are facing on distinct because of high water temperature in estuary of their habitat on their juvenile stage. It is necessary for conservation to evaluate how that condition effect on Ryukyu-Ayu. The aim of this study is to investigate an impact on their habitat suitability caused by development in estuary. To evaluate this we tried to apply the result of survival experiment on Ryukyu-Ayu larva to actual sites. This means we built statistical model to estimate 24 hours survival rate (ESR) from the experiment results and calculate ESR using field observation data of water temperature and salinity. The results show The ESR in habitat of artificial estuary is less than 40% even though more than 80% in all observation point in natural estuary and that carry out 1 deg water temperature falling can provide about 20% ESR rising.

Journal

• Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)

  Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 68 (4), I_709-I_714, 2012

  Japan Society of Civil Engineers

Keywords

• HABITAT EVALUATION
• WATER TEMPARATURE
• SALINITY
• ESTUARY
• RYUKYU-AYU

Details

• CRID: 1390001205352216576
• NII Article ID: 130004557742
• DOI: 10.2208/jscejhe.68.i_709
• ISSN: 2185467X
• Web Site: https://www.jstage.jst.go.jp/article/jscejhe/68/4/68_119/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed