Toxicity, Histological, Hepato-Somatic Index and Growth Responses of Cadmium Stressed Labeo rohita
Toxicity, Histological, Hepato-Somatic Index and Growth Responses of Cadmium Stressed Labeo rohita
Sumaira Fiaz1*, Huma Naz1*, Tanveer Ahmed2*, Iqra Zulfiqar1, Khalid Mehmood1, Muhammad Jabbar1, Syed Qaswar Ali Shah1, Muhammad Usman4
ABSTRACT
The concentration of heavy metals accelerated every day in aquatic surrounding causing serious health problem in fish and ultimately in human. So, current study was planned to evaluate effects of cadmium on the growth performance, liver histology and hepato-somatic index of Labeo rohita. The test was conducted in two phases. In the primary phase, the 96-hr LC50 and lethal concentration of water borne cadmium for fish L. rohita were determined as 12.38mgL-1 and 23.6mgL-1, respectively. In secondary phase, fish was subjected to sub-lethal (1/3rd of LC50) value of cadmium for 60-days. Result showed significant decrease in daily weight gain, daily length gain, condition factor, specific growth rate and feed conversion ratio of Cd-treated fish as compared to control fish. In liver, the diameter of hepatocytes was significantly lesser in Cd-treated fish in comparison with control fish. The width of sinusoids in Cd-treated fish was significantly greater in comparison with control fish. Some other histological disorders were also seen in liver of Cd-treated fish viz. infiltration of sinusoid, dilation and increased hemorrhage in sinusoids, inflammation and vacuolation in hepatocytes and ruptured hepatocytes after 60-days of experimental period. Hepatosomatic index was significantly less in Cd-treated fish than control fish throughout the experimental period. Addressing this problem requires a coordinated effort among governments, industries, and individuals to reduce heavy metal pollution, protect aquatic ecosystems, and safeguard human health.
Novelty Statement | The study is novel for fish farming as it finds out that cadmium has clear negative effects on the growth performance, liver histology and hepato-somatic index of fish.
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