Abstract
This study was conducted to determine the effect of detergents on eggs hatchability, survival rates, morphometry and bone structure of Wader Pari fish (Rasbora lateristriata Bleeker, 1854). The fish were treated with detergent solution, with a concentration of 0 mg L−1, 3 mg L−1, 6 mg L−1, 9 mg L−1, 18 mg L−1, 27 mg L−1, and 50 mg L−1, respectively. Each test consisted of one aquarium filled with 30 eggs. The number of eggs hatched was counted and these were treated continually for 1.5 mo to determine fish survival rates, morphology, growth rates and bone structure assays. The bone structure assay was prepared with Alizarin’s Red-Alcian Blue staining. The results show that detergent treatments at 0 mg L−1, 3 mg L−1, 6 mg L−1, 9 mg L−1 did not significantly affect hatchability, survival rate, or morphometry of either egg or fish (p > 0.05). However, a higher concentration at 18 mg L−1, 27 mg L−1, and 50 mg L−1, significantly affected the fish egg hatchability and survivability. Moreover, fish vertebral structures were normal at treatments of 0 mg L−1, 3 mg L−1, 6 mg L−1, whereas at 9 mg L−1, was caused abnormal vertebral structures.
Highlights
Detergents are cleaning products that are a cause for environmental concern as they may be leached into rivers, especially where water pollution control is not well regulated
Given that wader pari fish may be adversely affected by the growing concentrations of detergents in water, research to determine the specific effects of detergents on eggs in terms of hatchability, survival rate, morphometry and bone structure, is urgently needed
The results showed that the range percentage of egg hatchability after exposure to a detergent concentration of 18 mg L−1, 27 mg L−1 and 50 mg L−1, were as follows; 83.33 %, 86.67 %, and 83.33 %, respectively
Summary
Detergents are cleaning products that are a cause for environmental concern as they may be leached into rivers, especially where water pollution control is not well regulated. Amount 3 mg L−1 detergent can reduce the blood protein content of Cirrhinus mrigala [Hamilton, 1822] fish from 3.14 mg dL−1 to 1.28 mg dL−1 within the space of 72 h. This decrease may inhibit protein synthesis to the detriment of the formation of bone matrices, which in turn could lead to vertebral column abnormalities. Given that wader pari fish may be adversely affected by the growing concentrations of detergents in water, research to determine the specific effects of detergents on eggs in terms of hatchability, survival rate, morphometry and bone structure, is urgently needed
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