Association between blood pressure and urinary electrolytes in a population of nonurban-dwelling Nigerians

Background: Little is known about the association between blood pressure and urinary electrolytes in young adult, nonurban-dwelling, sub-Saharan Africans. This study attempts to provide such data in a Nigerian population. Patients and Methods: Four hundred Nigerians (50% female) aged 19-40 years were studied. Their blood pressures (BPs), anthropometric variables, and overnight urinary sodium, and potassium concentrations (UNaC and UKC respectively) were measured using standard procedures. Associations between measures of BP and the other parameters were examined using appropriate statistical tools.Results: UNaC was correlated significantly with only diastolic BP (DBP) (r = +0.105, P = 0.037). Similarly, UNaC was significantly associated with DBP and mean BP (MBP) (b = +0.158, P = 0.018 and b = +0.155, P = 0.020, respectively). UKC was not associated with, nor correlated with, any measure of BP. There was no significant mean difference (P > 0.05) between the sexes for measures of BP and urinary electrolytes.Conclusion: Urinary sodium (but not potassium) concentration was weakly correlated with only DBP, and weakly associated with only DBP and MBP in the studied population. The results support (modestly) the hypothesis that dietary sodium intake may be related to elevated blood pressure

Review of prostate cancer research in Nigeria

Prostate cancer (CaP) disparities in the black man calls for concerted research efforts. This review explores the trend and focus of CaP research activities in Nigeria, one of the ancestral nations for black men. It seeks to locate the place of the Nigerian research environment in the global progress on CaP disparities. Literature was reviewed mainly through a Pubmed search with the terms “prostate cancer”and “Nigeria”, as well as from internet and hard copies of journal pages

Behavioural indicators of welfare in farmed fish

Behaviour represents a reaction to the environment as fish perceive it and is therefore a key element of fish welfare. This review summarises the main findings on how behavioural changes have been used to assess welfare in farmed fish, using both functional and feeling-based approaches. Changes in foraging behaviour, ventilatory activity, aggression, individual and group swimming behaviour, stereotypic and abnormal behaviour have been linked with acute and chronic stressors in aquaculture and can therefore be regarded as likely indicators of poor welfare. On the contrary, measurements of exploratory behaviour, feed anticipatory activity and reward-related operant behaviour are beginning to be considered as indicators of positive emotions and welfare in fish. Despite the lack of scientific agreement about the existence of sentience in fish, the possibility that they are capable of both positive and negative emotions may contribute to the development of new strategies (e. g. environmental enrichment) to promote good welfare. Numerous studies that use behavioural indicators of welfare show that behavioural changes can be interpreted as either good or poor welfare depending on the fish species. It is therefore essential to understand the species-specific biology before drawing any conclusions in relation to welfare. In addition, different individuals within the same species may exhibit divergent coping strategies towards stressors, and what is tolerated by some individuals may be detrimental to others. Therefore, the assessment of welfare in a few individuals may not represent the average welfare of a group and vice versa. This underlines the need to develop on-farm, operational behavioural welfare indicators that can be easily used to assess not only the individual welfare but also the welfare of the whole group (e. g. spatial distribution). With the ongoing development of video technology and image processing, the on-farm surveillance of behaviour may in the near future represent a low-cost, noninvasive tool to assess the welfare of farmed fish.Fundação para a Ciência e Tecnologia, Portugal [SFRH/BPD/42015/2007]info:eu-repo/semantics/publishedVersio