Paper Information

Title: 

BIOACCUMULATION AND GILL DAMAGES OF INORGANIC MERCURY IN ACIPENSER PERSICUS

Type: PAPER
Author(s): SHAHRIARI MOGHADAM MOHSEN*,GHANBARI MEHDI
 
 *DEPARTMENT OF ENVIRONMENT, FACULTY OF NATURAL RESOURCES, UNIVERSITY OF ZABOL
 
Name of Seminar: INTERNATIONAL CONFERENCE ON WATER CRISIS
Type of Seminar:  CONFERENCE
Sponsor:  zabol University
Date:  2009Volume 1
 
 
Abstract: 

AMONG METALS, MERCURY IS UNIQUE IS FOUND IN THE ENVIRONMENT IN SEVERAL PHYSICAL AND CHEMICAL FORMS. ALL FORMS OF MERCURY CAUSE TOXIC EFFECTS IN NUMBER OF TISSUES AND ORGANS DEPENDING ON THE CHEMICAL FORM OF MERCURY, THE LEVEL OF EXPOSURE, THE DURATION OF EXPOSURE, AND THE ROUT OF EXPOSURE. THREE MONTH OLD ACIPENSER PERSICUS WERE OBTAINED FROM COMMERCIAL FISH FARM, AND ACCLIMATIZED TO EXPERIMENTAL CONDITIONS FOR 7 DAYS. THE EXPERIMENT BEGAN WITH TRANSFER OF 50 FISH FROM THE STOCK TANK TO 80-L AQUARIUM CONTAINING 15MG HG (II) L-1. FISH WERE COLLECTED AFTER 12, 24, 48 AND 96H. GILLS WERE SAMPLED AND PROCESSED FOR BIOACCUMULATION AND HISTOLOGICAL EXAMINATION. MERCURY CONCENTRATIONS WERE DETERMINED BY ADVANCED MERCURY ANALYZER 254, LECO AND HISTOPATHOLOGICAL CHANGES WERE STUDIED USING SCANNING ELECTRON MICROSCOPY. THE RESULT SHOWED MERCURY CONCENTRATION IN BLANK SAMPLE WERE 0.0027MG. THE BIOACCUMULATION VALUES DURING 12, 24, 48 AND 96H IN GILLS WERE 0.007, 0.0131, 0.723 AND 0.037. INJURIES TO SECONDARY LAMELLA WERE OBSERVED AFTER 24 H OF EXPOSURE TO WATER-BONE INORGANIC MERCURY EXFOLIATE EPITHELIA WITH DETACHMENT, FORMATION OF AN INTERLAMELLAR BRIDGE AND REDUCTION OF THE WATER SPACE AND ANEURYSM CAN BE SEEN AFTER 24H AND A PARTIAL RECOVERY WAS SEEN BY THE END OF THE 96-H EXPOSURE PERIOD.

 
Keyword(s): ACIPENSER PERSICUS, HISTOPATHOLOGY, HGCL2, BIOACCUMULATION
 
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