Balikis Opeyemi AMUSA, Zoology - Olabisi Onabanjo University, 2021

Clarias gariepinus respire bio modally. Which tolerates both well and poorly oxygenated waters. The present study investigated the effects of quarry particles on the behaviour and histopathology of clarias gariepinus juvenile. It also evaluates the effects of quarry on the ecosystem. Clarias gariepinus juveniles were obtained from the ministry of agriculture fish farm, Ikenne, Remo Ogun State on the 9th of March 2020, at 3 weeks and 6 days of age and acclimatized in Animal-House, Department of Zoology and Environmental Biology. Physico-chemical parameters of the water were examined, water temperature, pH, dissolved oxygen concentrations (DO), electric conductivity (EC) and total dissolved solids were measured daily (28.0 ± 0.1 °C, 7.8 ± 0.025 pH, 3.05 ± 1.3ppm D.O, 683.75 ± 50μs/cm and 432.33 ± 64ppm). Behavioural changes were observed, the fishes were sacrificed and histopathology experiment procedure was carried out. Behavioural changes in fish exposed to quarry particles ranged from active swimming, gasping of air, regurgitating and rushing of food, hyperactivity and restlessness. Similar changes were not observed in the control throughout the experiment. Histopathology of the liver of fish exposed to quarry particles of 150g revealed severe damage and necrosis of the liver cells when compared with the control which had a normal distribution of hepatic cells. Conclusively, quarry particles can affect fish organs and it causes histopathological changes in organs like fish bone, muscle, gills and liver. Actions should be taken in the measure of quarry particles processing. Government should make policies on quarry industries. Monitoring personnel should be deployed.

Belau Mariam Abolanle, Industrial Relations and Personnel Management - Olabisi Onabanjo University, 2025

The study of employee performance and performance management system is not new in empirical research. However, there is need to examine the link between performance management tools, innovative tools and employee performance in public schools. This study therefore used a case study research design to examine this link by extracting information from 22 teachers and 2 non-teaching staff of Itamerin Comprehensive High School, Ago-Iwoye, Ogun State. Tables and simple percentage and ordinal logistic regression are used as method of data analysis. The study finds that performance management system tools that positively significantly impact employee performance are teacher appraisal and evaluation (coefficient = 0.8424, probability = 0.000); goal setting and planning (coefficient = 3.2607, probability = 0.041); feedback mechanism (coefficient = 14.7357, probability = 0.035); monitoring and documentation (coefficient = 0.2898, probability = 0.026) and reward and recognition system (coefficient = 0.1.1166, probability = 0.003). The study further finds that artificial intelligence and adaptive learning (coefficient = 1.2540, probability = 0.005) and digital assessment tools (coefficient = 2.3561, probability = 0.027) positively significantly mediate between performance management system and employee performance. The study concluded that factors that lead to employee performance are teacher appraisal and evaluation, goal setting and planning, feedback mechanism, monitoring and documentation, reward and recognition system. The study recommends that teachers should be encouraged to use artificial intelligence and adaptive learning tools as well as digital assessment tools in order to achieve better performance.