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The acute toxicity, in terms of 96-hr LC50 and lethal concentration, of aluminum (Al) regarding four fish species viz. Labeo
rohita, Cirrhina mrigala, Catla catla and Ctenopharyngodon idella of 90-, 120- and 150-day age groups was determined under
the wet laboratory under static bioassay. All the tests were performed, separately, at constant water temperature (30°C), pH
(7.5) and hardness (300mgL-1
). All fish species showed significantly (p<0.05) variable sensitivity to different concentrations
of aluminum. However, Labeo rohita of all the three age groups showed significantly least sensitivity, in-terms of 96-hr LC50
and lethal concentration, against aluminum. For the age groups, 90-day fish showed significantly higher sensitivity, followed
by that of 120- and 150-day old fish groups. Among fish species, Ctenopharyngodon idella exhibited significantly (P<0.05)
higher sensitivity to aluminum with the mean 96-hr LC50 and lethal concentrations of 56.91±22.17 and 85.66±23.33mgL‾1
,
respectively while Labeo rohita were significantly least sensitive with the mean 96-hr LC50 and lethal concentrations of
75.50±21.09 and 118.71±23.00mgL‾1
, respectively. Physico-chemical variables viz., dissolved oxygen showed highly
significant and inverse relationship with aluminum concentration while ammonia had highly significant but positive impact on
aluminum concentration of the test media
Safina Kousar, Muhammad Javed, Rahila Ilyas. (2016) Assessment Of Acute Toxicity Of Aluminum To The Four Freshwater Fish Species (Labeo Rohita, Cirrhina Mrigala, Catla Catla And Ctenopharyngodon Idella), , Volume-53, Issue-2.
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