Acute toxicity of a Biopesticide Spinosad to benthic Oligochaete worm, Branchiura sowerbyi and the fry of Common Carp, Cyprinus carpio.
Journal Title: International Journal of Life Science - Year 2018, Vol 6, Issue 1
Abstract
Toxicity of a Biopesticide Spinosad to benthic Oligochaete worm, Branchiura sowerbyi and the fry of common carp, Cyprinus carpio along with their behavioural changes were evaluated in the present study. The 24, 48, 72 and 96 h LC50 values of Spinosad to Branchiura sowerbyi were 21.19, 12.40, 8.76 and 6.14 mg/l and to the fry of Cyprinus carpio were 5.03, 3.20, 2.16, 1.77 mg/l respectively. The mortality rate of B. sowerbyi and C. carpio showed significant variation (p<0.05) with the increasing concentrations at all exposure times. On the other hand, the mortality rate of B. sowerbyi and C. carpio also varied significantly (p<0.05) at all the doses with increasing exposure times (24, 48 and 72 and 96h). Excess mucous secretion, decreasing movements and decreasing clumping tendency were recorded in B. sowerbyi at higher concentrations. The excess mucous secretion with increasing concentration of toxicant and exposure time was recorded in the exposed fish. The treated fish showed faster movement and wide opening of mouth and gills at higher concentrations at 24 and 48h of exposure. At 72 and 96h of exposure the fish became sluggish and the movement was gradually reduced with increasing concentration. Similarly, the mouth and gill openings were reduced and were almost absent at the higher concentrations after 72h of exposure. The opercular movement of fish was increased significantly (p<0.05) at 24 and 48h but decreased significantly (p<0.05) at 72 and 96h.
Authors and Affiliations
Chandan Sarkar, Nimai Chandra Saha
Keywords
Related Articles
- EP ID EP545848
- DOI -
- Views 108
- Downloads 0
Differential productivity response of rain fed sorghum (Sorghum bicolor L.) genotypes in relation to graded levels of nitrogen in Kellem Wollega zone of Ethiopia, East Africa
Field experiment was conducted at Haro Sabu Agricultural Research Center using three sorghum genotypes (Lalo, Chemada and Local) during the rainy cropping season of 2014 with an objective to determine the effect of nitro...
Effect of copper sulphate on the regulation of nitrogen metabolism in the Rita rita fish
Effect of copper sulphate (CuSO4.5H2O) to Rita rita (catfish) species was investigated using toxicity index of 96 hours LC50 and the quantal response determined by the statistical probit analysis method. In response to t...
Tef [Eragrostis Tef (Zucc.) Trotte] under Different Water Levels and N-P Fertilizer Rates in Tigray region, Northern Ethiopia
On-field experiment on Tef performance was conducted in Tigray region of Northern Ethiopia with the objective of evaluating the effects of N-P rates and water levels on yield and yield components of tef. The experimental...
Head dimorphism in the African python, Python natalensis (Squamata: Pythonidae) from Tanzania
Very little is known about intraspecific variation in the Southern African rock python which is also referred to as the Natal rock python or simply the African python, Python natalensis Smith, 1833 (family Pythonidae of...
Acute toxicity of a Biopesticide Spinosad to benthic Oligochaete worm, Branchiura sowerbyi and the fry of Common Carp, Cyprinus carpio.
Toxicity of a Biopesticide Spinosad to benthic Oligochaete worm, Branchiura sowerbyi and the fry of common carp, Cyprinus carpio along with their behavioural changes were evaluated in the present study. The 24, 48, 72 an...