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Fresh catfish (Clarias gariepinus) is highly perishable. This paper aims to investigate the drying characteristics and quality of body-mass dehydrated catfish to determine the effective dehydration parameters for preservation.

Brine concentration (3-9 per cent), brining time (30-90 min) and drying temperature (90-130°C) interacted using the response surface methodology. Preliminary experiments were conducted to select treatments. Moisture content and ratio and drying rate were determined and fitted into five thin-layer drying models; the goodness of fit was evaluated by average grade ranking of the regression parameters. Proximate compositions and microbial load of dehydrated catfish were determined using standard methods.

Treatments with 110°C gave initial higher drying rate (0.034-0.043 kg H₂O/kg solid/h) and shorter drying time (20-21 h). Drying occurred at two falling rate periods. Midilli model ranked first in fitting the drying data. It explained up to 99.6-99.7 per cent of the total variations in the independent variables with low values of error terms; RMSE was 0.02131-0.01794 and χ² was 0.00037-0.00043, indicating good predictive quality. Processing parameters positively and significantly (p < 0.05) influenced the proximate compositions of dehydrated catfish. Treatment: 6 per cent brine, 90 min and 110°C presented the most effective dehydration parameters for quality preservation of body-mass catfish.

The dehydration technique used in this study could enhance nutritive quality and storage stability of body-mass dehydrated catfish that could serve as a useful and convenient tool for commercial application.

Hygienically processed dehydrated catfish of good quality could be used as a source of nutrients to ameliorate malnutrition and reduce post-harvest losses of catfish.

The effective processing parameters established is an important step to harness the high nutrients and economic values embedded in catfish.

“Corrupt practices” is a recurring feature of media coverage. The paper seeks to encourage debates about the influence of institutional structures on agency to break away from methodological individualism. This paper aims to encourage reflections on the role of both the structures and actors which have shaped the continuous expansion of corrupt practices in Nigeria.

Whilst recognising that deviant behaviour by some individuals is always possible, this paper has rejected methodological individualism and shows the value of locating anti-social practices within the broader socio-political and historical context. Within a socio-political framework, this study adopts the theories of critical realism, developmental state and globalisation to understand the relationship between social agency and society, focusing upon the institutional structures and the role of social actors.

The evidence shows that socio-political and economic development, politics, power, history and globalisation have continued to reproduce and transform the institutional structures and actors which have facilitated anti-social practices in Nigeria. The paper concludes that large sums of government revenue have been undermined by the anti-social practices of the Nigerian political and economic elite (both local and international), which have enriched a few, but impoverished most, Nigerians.

As a consequence of recurring corrupt practices in Nigeria, there is a pressing need for reform to curb these practices which have had, and continue to have, a serious effect on Nigeria and its future development.

It provides a framework for understanding and explaining the inter-relations of actors and institutional structures and the linkages and influences that have shaped the practices in Nigeria.