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Haematological and Histological Changes in Iridescent Shark, PANGASUIS Hypophthalmus (Sauvage, 1878) Exposed to Heavy Metal Lead and cadmium

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Title Haematological and Histological Changes in Iridescent Shark, PANGASUIS Hypophthalmus (Sauvage, 1878) Exposed to Heavy Metal Lead and cadmium
 
Creator Shruthishree, C.
 
Contributor Gangadhar gowda
Indulkar
Jayaraj, E.G.
Dinesh Babu
Ganapathi Naik, M.
Mridula Rajesh
 
Subject ---
 
Description Ph.D. Thesis
Heavy metals are found to be harmful pollutants, affecting the aquatic
environment, causing acute and chronic toxicity to aquatic organisms including fish.
Alteration in the haematological profile and morphological changes in different organs
are the early symptoms of heavy metal poison to aquatic organisms. A bioassay was
conducted to determine the lethal toxicity (LCso) of heavy metal, lead and cadmium on
P. hypophthalmus. The lethal toxicity (LCso) of lead and cadmium was found to be
71.44ppm, and 30.19 ppm respectively. The results revealed that, the fish exposedto
lead and cadmium had effect on fish P. hypophthalmus.
For sublethal toxicity study, the fishes were exposed to two sublethal
concentrations (i.e IIsth and 1I10th) upto 28 days. Significant decrease in RBC count,
haemoglobin content, and significant increase in WBC count were noticed in P.
hypophthamus exposed to lead and cadmium for a period of 28 days. From the results it
was concluded that cadmium caused severe alterations in haematological parameters
compared to lead. The results of histological studies revealed that lead and cadmium
caused severe damage to morphology of gill, liver and kidney. Physiological parameters
such as oxygen consumption rate, 0: N ratio and food consumption rate decreased
significantly (p
 
Date 2016-06-25T12:04:48Z
2016-06-25T12:04:48Z
2015-05-10
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/68019
 
Language en
 
Format application/pdf
 
Publisher Karnataka Veterinary, Animal and Fisheries Sciences University, Bidar