Effects of chronic lead and cadmium exposure on the oriental river prawn (Macrobrachium nipponense) in laboratory conditions.
Comp Biochem Physiol C Toxicol Pharmacol
; 221: 21-28, 2019 Jul.
Article
em En
| MEDLINE
| ID: mdl-30930206
During the past decade, the total population and overall reproductive performance of the oriental river prawn (Macrobrachium nipponense) in the Anzali international wetland and its basin rivers has been severely reduced. This seems to be caused by an increase in heavy metal pollution from industrial wastewaters. We investigated the effects of chronic levels of lead (Pb) and cadmium (Cd) on reproductive success, hemato-immunology, crustacean hyperglycemic hormone (cHH), Pb/Cd bioaccumulation and histopathology of hepatopancreas of oriental river prawn. The present study was separately carried out using four chronic treatments for Pb (0 (control), 0.024, 0.072 and 0.12⯵M/l) and Cd (0 (control), 0.026, 0.053 and 0.08⯵M/l) in experimental tanks during 60â¯days. The broodstock were fed by commercial shrimp diet, ad libitum, twice a day. The results revealed that reproductive activities ceased when Pb levels were 0.072 and 0.12⯵M/l and also when Cd levels reached 0.08⯵M/l. At 0.024⯵M/l Pb, 0.026 and 0.053⯵M/l Cd, the prawns showed initial reproductive activity but after spawning, the egg-clutches were found detached from the pleopods of the brood females. Hemato-immunology results showed that by increasing the Pb and Cd concentrations, large granular hemocyte (LGH) and cHH values also increased. However, small granular hemocyte (SGH) count was inversely affected. A significant increase in mortality (Pâ¯<â¯0.05) was observed as both Pb and Cd concentrations increased. Histological observations are indicative of increased necrosis, lumen size, melanization, vacuolation and abnormal lumen shape, as the heavy metals concentrations increased. In conclusion, obtained results can help to elucidate effects of Pb and Cd on freshwater decapod crustaceans reproductive performance and related physiological parameters.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Poluentes Químicos da Água
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Cádmio
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Palaemonidae
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Chumbo
Limite:
Animals
Idioma:
En
Revista:
Comp Biochem Physiol C Toxicol Pharmacol
Assunto da revista:
FARMACOLOGIA
/
TOXICOLOGIA
Ano de publicação:
2019
Tipo de documento:
Article