Document Detail

Mass mortality of the Japanese pearl oyster Pinctada fucata martensii in relation to water temperature, chlorophyll a and phytoplankton composition.
MedLine Citation:
PMID:  11253876     Owner:  NLM     Status:  MEDLINE    
Mass mortalities of the Japanese pearl oyster Pinctada fucata martensii have widely occurred in western Japan since 1994. The causes of these mass mortalities are at present not thoroughly understood. In this study, we investigated oyster survival in relation to some environmental factors such as water temperature, concentration of chlorophyll a and density or composition of phytoplankton. The examined mass mortality occurred from September to December 1998, and the color on the adductor muscle of the oysters was red-brown, suggesting an infectious disease. Oysters that became moribund during the experiment lost weight, while the weight of unaffected oysters increased. The cell density of Nitzschia spp., an inedible algae for the oyster, in Uchiumi Bay increased before and during the mass mortality event. From the results of our study, we hypothesize that P. fucata martensii was weakened by starvation because of the dominance of inedible food and then contracted an infectious disease that resulted in mortality.
Y Tomaru; Z Kawabata; S Nakano
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Diseases of aquatic organisms     Volume:  44     ISSN:  0177-5103     ISO Abbreviation:  Dis. Aquat. Org.     Publication Date:  2001 Jan 
Date Detail:
Created Date:  2001-03-19     Completed Date:  2001-05-31     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8807037     Medline TA:  Dis Aquat Organ     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  61-8     Citation Subset:  IM    
Department of Environmental Conservation Sciences, The United Graduate School of Agricultural Sciences, Ehime University, Matsuyama, Japan.
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MeSH Terms
Chlorophyll / analysis*
Mortality / trends*
Phytoplankton / chemistry,  isolation & purification*
Reg. No./Substance:
1406-65-1/Chlorophyll; 479-61-8/chlorophyll a; 7732-18-5/Water

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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