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Predicting seedling emergence of cabbage and onion using vigour tests
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.K. Fessehazion --- Department of Plant Production and Soil Science, South Africa D. Marais --- Department of Plant Production and Soil Science, South Africa P.J. Robbertse --- Department of Plant Production and Soil Science, South AfricaPredicting seedling emergence using standard and non-standard germination temperatures, standard accelerated ageing (AA) and saturated salt accelerated ageing (SSAA) tests, were investigated. Germinations were performed at temperatures of 10°, 20°, 20°/30° and 30°C for cabbage (Brassica oleracea var. capitata L.)... -
A COMPARISON OF DIFFERENT METHODS OF AGE DETERMINATION IN THE SHARPTOOTH CATFISH CLARIAS GARIEPINUS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: Douglas Clay --- Department of Zoology, U. K.Growth of the sharptooth catfish Clarias gariepinus from four southern African impoundments was estimated by back-calculating age from vertebrae and spines. Length frequency analysis supported the growth estimates derived from vertebrae but not those from spines.- Spines under-estimated the age... -
Sexuality among the elderly in Dzivaresekwa district of Harare: the challenge of information, education and communication campaigns in support of an HIV/AIDS response
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Ignatius Gutsa --- Department of Sociology, ZimbabweThis ethnographic study in Dzivaresekwa district, Harare, Zimbabwe, examines the issue of sexuality among the elderly and their challenges in accessing information, education, and communication (IEC) campaigns in the face of HIV and AIDS. The research depended heavily on collecting... -
Older people living with HIV in Uganda: understanding their experience and needs
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: MonicaO Kuteesa --- , Australia Janet Seeley --- Uganda Research Unit on AIDS, Uganda RobertG Cumming --- , Australia Joel Negin --- , AustraliaOlder adults ageing with HIV in Africa have been largely neglected, despite the distinctive healthcare needs of this population. This article examines the medical care experiences of older Ugandans living with HIV. Data were collected from 40 HIV-positive adults, aged... -
Age, growth rate and size at sexual maturity of Labeobarbus aeneus (Teleostei: Cyprinidae) in the middle Vaal River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: R Gerber --- Centre for Aquatic Research, Department of Zoology, South Africa NJ Smit --- Centre for Aquatic Research, Department of Zoology, South Africa GM Wagenaar --- Centre for Aquatic Research, Department of Zoology, South AfricaAge structure, growth and size at sexual maturity of smallmouth yellowfish, Labeobarbus aeneus (Burchell), were assessed in 2008–2009. Despite its angling and food importance, little has been published on many aspects of its ecology and biology, specifically its age structure... -
Breeding biology and nestling development of the Grasshopper Buzzard
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: R Buij --- Institute of Environmental Sciences, The Netherlands K Kortekaas --- Institute of Environmental Sciences, The Netherlands I Folkertsma --- Institute of Environmental Sciences, The Netherlands M van der Velde --- Behavioural Ecology and Self-organization, Centre for Ecological and Evolutionary Studies, The Netherlands J Komdeur --- Behavioural Ecology and Self-organization, Centre for Ecological and Evolutionary Studies, The Netherlands HH de Iongh --- Institute of Environmental Sciences, The NetherlandsResearch into the effect of environmental variables on reproductive success of tropical raptors is often constrained by the lack of information on breeding biology. We provide the first detailed information of the breeding biology and nestling development of the Grasshopper... -
The effects of ageing biases on stock assessment and management advice: a case study on Namibian horse mackerel
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MR Wilhelm MD Durholtz CH KirchnerWe explore the influence of age-estimation errors on the results of the age-structured production model (ASPM) used for horse mackerel stock assessment in Namibia for the period 1961–2003. The analysis considered age data from eight readers collected during an otolith-reading... -
Growth rates of alien Oreochromis niloticus and indigenous Oreochromis mortimeri in Lake Kariba, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PC Chifamba --- Department of Biological Sciences, Zimbabwe JJ Videler --- Centre for Ecological and Evolutionary Studies, The NetherlandsGrowth rates of indigenous Oreochromis mortimeri and alien Oreochromis niloticus from Lake Kariba were estimated from samples collected in 1997–2000, 2003–2005 and 2010–2011. Growth zones on scales and otoliths of O. niloticus and on the otoliths and opercula of O... -
Gender perspectives in care provision and care receipt among older people infected and affected by HIV in Uganda
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Joseph O Mugisha --- Medical Research Council/Uganda Virus Research Institute (MRC/UVRI), Uganda Research Unit on AIDS, E Schatz --- Department of Health Sciences, USA J Seeley --- Medical Research Council/Uganda Virus Research Institute (MRC/UVRI), Uganda Research Unit on AIDS, P Kowal --- World Health Organization Study on Global AGEing and Adult Health, SwitzerlandThe objective of this study was to examine gender roles in the provision and receipt of care among older Ugandans. Survey data on care work were collected in 2009–2010 from 510 older people infected or affected by HIV/AIDS, at one... -
Life history traits of Bathyclarias nyasensis (Siluroidei) in Lake Malawi
Item type: Journal Article • Journal: African Zoology • Authors: E. Kaunda --- Department of Ichthyology and Fisheries Science, South Africa T. Hecht --- Department of Ichthyology and Fisheries Science, South AfricaLife history traits, including age, growth, reproduction and diet of Bathyclarias nyasensis from Lake Malawi were studied between December 1996 and November 1998. Owing to reabsorp tion of pectoral spines with increasing fish size, and the relatively low number of... -
Age and growth of narrow-barred Spanish mackerel Scomberomorus commerson in the coastal waters of southern Mozambique and KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: B Lee --- Oceanographic Research Institute (ORI), South Africa BQ Mann --- Oceanographic Research Institute (ORI), South AfricaThe narrow-barred Spanish mackerel Scomberomorus commerson is one of the most important linefish species caught in KwaZulu-Natal and southern Mozambique waters, forming the basis of important commercial, artisanal and recreational fisheries. A total of 439 S. commerson were sampled along... -
Social engagement and survival in people aged 50 years and over living with HIV and without HIV in Uganda: a prospective cohort study
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Joseph O Mugisha --- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine, Uganda Enid J Schatz --- Department of Health Sciences, USA Christian Hansen --- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine, Uganda Emily Leary --- Biostatistics and Research Design Unit, School of Medicine, USA Joel Negin --- School of Public Health, Australia Paul Kowal --- World Health Organization study on global AGEing and adult health, Switzerland Janet Seeley --- Medical Research Council/Uganda Virus Research Institute and London School of Hygiene and Tropical Medicine, UgandaThis study examined the association between social engagement and survival in people with or without HIV aged 50 years and over in Uganda. We analysed two waves of a survey from two sites in Uganda to assess predictors of mortality... -
Age, growth and natural mortality of blue jack mackerel Trachurus picturatus (Carangidae) from the Canary Islands, Spain (NW Africa)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Jurado-Ruzafa --- , Spain MTG Santamaría --- , SpainStatus assessment of exploited fish populations is a general requirement to ensure sustainability of fisheries in both global and local contexts. The blue jack mackerel Trachurus picturatus (Bowdich, 1825) remains unassessed in a data-limited fishery in the eastern central Atlantic,... -
HIV prevalence and related behaviours of older people in Botswana — secondary analysis of the Botswana AIDS Impact Survey (BAIS) IV
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Kabo Matlho --- School of Public Health, Australia Madeleine Randell --- School of Public Health, Australia Refelwetswe Lebelonyane --- Ministry of Health, Botswana Joseph Kefas --- National AIDS Coordinating Agency, Botswana Tim Driscoll --- School of Public Health, Australia Joel Negin --- School of Public Health, AustraliaThe focus of HIV interventions in Botswana, a country with the second highest prevalence of HIV in the world, remains targeted at those aged 15–49 years despite a growing cohort of older people living with the disease — driven largely... -
HIV serostatus, inflammatory biomarkers and the frailty phenotype among older people in rural KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Anita Edwards --- , South Africa Mark J Siedner --- , South Africa Stephen Nash --- , UK Melissa Neuman --- , UK Sivapragashini Danaviah --- , South Africa Theresa Smit --- , South Africa Dickman Gareta --- , South Africa Paul Kowal --- , Switzerland Janet Seeley --- , South AfricaObjective: We compared the prevalence of frailty by HIV serostatus and related biomarkers to the modified frailty phenotype among older individuals in a rural population in South Africa. -
Effect of COVID-19 on older adults 50 years and above living with HIV in a less-developed country
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Mathew Nyashanu --- Nottingham Trent University, United Kingdom Derrick Amooti Lusota --- Makerere University, Uganda Martin Muddu --- Makerere University Joint AIDS Program, Uganda Scovia Nalugo Mbalinda --- Makerere University, UgandaIntroduction: Globally, control measures have been communicated to reverse the COVID-19 pandemic. In Uganda, as soon as the first case of COVID-19 was identified, strict lockdown measures were enforced, including a ban on all public and private transport, night curfew,... -
Policy-maker attitudes to the ageing of the HIV cohort in Botswana
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Kabo Matlho --- , , Australia Refelwetswe Lebelonyane --- , Botswana Tim Driscoll --- , , Australia Joel Negin --- , , AustraliaBackground: The roll out of antiretroviral therapy in Botswana, as in many countries with near universal access to treatment, has transformed HIV into a complex yet manageable chronic condition and has led to the emergence of a population aging with... -
Physical and psychosocial aspects of healthy ageing and HIV status among older adults in South Africa
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- University of the Free State, South Africa Refilwe N. Phaswana-Mafuya --- South African Medical Research Council/University of Johannesburg (SAMRC/UJ) - Pan African Centre for Epidemics Research (PACER) Extramural Unit, South AfricaThe study aimed to assess the prevalence by type of psychosocial associations with healthy ageing among older adults by HIV status in South Africa. We analysed data from the 2017 South African National HIV Prevalence, Incidence, Behaviour, and Communication Survey... -
Assessment of seed quality through rapid tests: a bibliometric analysis
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Carlos Luiz da Silva --- Federal Rural University of Pernambuco, Brazil Marcone Moreira Santos --- Federal Rural University of Pernambuco, Brazil Eliane Cristina Sampaio de Freitas --- Federal Rural University of Pernambuco, Brazil Raquel Maria de Oliveira Pires --- Federal University of Lavras, Brazil Moema Barbosa de Sousa --- Federal Rural University of Pernambuco, Brazil Paulo César da Silva Santos --- Federal Rural University of Pernambuco, Brazil Erika Rayra Lima Nonato --- Federal Rural University of Pernambuco, Brazil Gabriel Alves de Lima --- Federal Rural University of Pernambuco, Brazil Ricardo Gallo --- Federal Rural University of Pernambuco, BrazilSeed quality is essential to ensure success in plant production. Traditionally, germination testing is widely used to assess seed viability, but it is a time-consuming process. Consequently, rapid tests have been increasingly explored due to their efficiency and speed. This... -
Physical activity and exercise for older people living with HIV – the perceptions of health care professionals
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Levin Chetty --- University of KwaZulu-Natal, South Africa Saul Cobbing --- University of KwaZulu-Natal, South Africa Verusia Chetty --- University of KwaZulu-Natal, South AfricaAs people age with HIV, the prescription of physical activity should be included as part of their comprehensive medical management. The higher prevalence of comorbidities, polypharmacy, drug interactions and end-stage complications in this specific population requires a multidisciplinary health care...
