number of downloads : ?
language
jpn
Title Transcription
ナカウミ ホンジョウ コウク ニ オケル アサリ ノ セイチョウ ト セイザン ニ オヨボス シオドオシ ノ コウカ
Author
門脇 義雄
浜口 昌巳
藤森 恒至
立見 博俊
Description
Growth and survival rate were examined for adult Ruditapes philippinarum in Honjo Area of Lake Nakaumi. This area is a brackish lake enclosed by embankments built for reclamation. Two pipes for sea-water induction of 2.5m in diameter were constructed on March 1998, to investigate potential of fishery promotion. Containers carrying 50 individuals of Ruditapes each were set on lake bottom of 2 stations ; (1) Pipe-Front in Honjo and (2) Off-Eshima in Honjo Area. Growth, Survival rate and water quality (temperature, salinity, dissolved oxygen) were examined between 1.5m and 4m in water depth for these stations, from June 4 to November 5 in 1998. Shell growth is apparently higher among individuals set on 1.5m depth than on 4m depth, for both Pipe-Front and Off- Eshima stations. This low growth on 4m depth was supposed to be derived from combined factors such as lower dissolved oxygen, lower food supply, lower water current effect and so on. Mass mortality occurred around off Eshima Island in the end of July. This event was derived by concurrent death of sea algae, Cladofphora speciosa. The water current through the induction pipes appears to make better environment for animals enough to ayoid the influence of this mortal event. However the pipes could not avoid the low growth of Ruditapes on 4m depth.
Subject
アサリ
成長
生残
中海
潮通しパイプ
Journal Title
Journal of Fisheries Engineering
Volume
37
Issue
1
Start Page
45
End Page
54
ISSN
0916-7617
ISSN(Online)
2189-7131
Published Date
2000
DOI
Publisher
日本水産工学会
Publisher Transcription
ニホン スイサン コウガッカイ
Publisher Aalternative
The Japanese Society of Fisheries Engineering
NII Type
Journal Article
OAI-PMH Set
Faculty of Life and Environmental Science