Health assessment of freshwater fish species from Albasini Dam, outside a DDT-sprayed area in Limpopo province, South Africa: a preliminary study

Nibamureke, U. M. C.; Barnhoorn, I.E.J.; Wagenaar, G.M.

doi:10.2989/16085914.2016.1172198

Cited by 7 publications

(2 citation statements)

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“…This table was developed specifically for the maturity identification of the testes from C. gariepinus (adapted from the features described by Cambray, , Booth & Weyl, and Gerber et al, ).The most prominent characteristic during the developing spermatogenic stages was the white ‘wavy fringe’ on the lateral region of the testes (Pieterse, Marchand, Dyk, & Barnhoorn, ; Wagenaar, Botha, & Barnhoorn, ). This area develops and becomes more prominent as more developing germ cells mature into spermatozoa during the late spermatogenic stage (Nibamureke, Barnhoorn, & Wagenaar, ). After microscopic assessment, the maturity stages of the testes were confirmed, and four categories noted; stage 0, undeveloped testes; stage 1, immature, developing early spermatocytes; stage 2, developing mid‐spermatogenic and stage 3, ripe, mostly developing spermatids and sperm.…”

Section: Resultsmentioning

confidence: 99%

The urogenital papillae as an indicator of sexual maturity in male African catfish, Clarias gariepinus, (Burchell, 1822)

et al. 2019

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The present study investigated a non‐invasive method based on macroscopic morphological features of male Clarias gariepinus for the assessment of sexual maturity stage. As African catfish cannot be stripped for semen as in most other fish species; they have to be killed to obtain semen from the testes. This method could be used to ensure that males used to obtain sperm are sexually mature to increase the concentration and quality of mature sperm for egg fertilization in the production of C. gariepinus. Morphological features including the length and width of the urogenital papillae (UGP), an external secondary sexual characteristic of C. gariepinus (n = 89) were measured and calculated as a percentage of total body length. The urogenital papillae length (LUGP) and width (WUGP) index of each fish were used and compared with the macroscopic and microscopic maturity stage of the testes. The results revealed that although positive, a significant correlation does not exist between the LUGP or WUGP and maturity stage of the testes. Therefore, although this procedure would be valuable as an initial non‐invasive assessment of maturity, it does not provide an accurate or reliable indication of the maturity stage of the fish.

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Section: Resultsmentioning

confidence: 99%

The urogenital papillae as an indicator of sexual maturity in male African catfish, Clarias gariepinus, (Burchell, 1822)

et al. 2019

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“…Indeed, such samplings could define exposure windows over time and space to multiple pesticides and lay a basis for risk assessments. However, among the studies that collected environmental samples, only a few assessed environmental [ 21 , 86 , 87 ] or human health risks [ 22 , 85 , 88 , 89 , 90 ]. Indeed, in serval cases, there are no contextual environmental risk thresholds available.…”

Section: Discussionmentioning

confidence: 99%

Pesticide Research on Environmental and Human Exposure and Risks in Sub-Saharan Africa: A Systematic Literature Review

Fuhrimann

Wan

Blouzard

et al. 2021

IJERPH

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On the African continent, ongoing agriculture intensification is accompanied by the increasing use of pesticides, associated with environmental and public health concerns. Using a systematic literature review, we aimed to map current geographical research hotspots and gaps around environmental and public health risks research of agriculture pesticides in Sub-Saharan Africa (SSA). Studies were included that collected primary data on past and current-used agricultural pesticides and assessed their environmental occurrence, related knowledge, attitude and practice, human exposure, and environmental or public health risks between 2006 and 2021. We identified 391 articles covering 469 study sites in 37 countries in SSA. Five geographical research hotspots were identified: two in South Africa, two in East Africa, and one in West Africa. Despite its ban for agricultural use, organochlorine was the most studied pesticide group (60%; 86% of studies included DDT). Current-used pesticides in agriculture were studied in 54% of the study sites (including insecticides (92%), herbicides (44%), and fungicides (35%)). Environmental samples were collected in 67% of the studies (e.g., water, aquatic species, sediment, agricultural produce, and air). In 38% of the studies, human subjects were investigated. Only few studies had a longitudinal design or assessed pesticide’s environmental risks; human biomarkers; dose-response in human subjects, including children and women; and interventions to reduce pesticide exposure. We established a research database that can help stakeholders to address research gaps, foster research collaboration between environmental and health dimensions, and work towards sustainable and safe agriculture systems in SSA.

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Gill histopathological indicators in pikeperch Sander lucioperca larvae reared in a flow-through system: effect of clay-turbid water

et al. 2019

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Health assessment of freshwater fish species from Albasini Dam, outside a DDT-sprayed area in Limpopo province, South Africa: a preliminary study

Cited by 7 publications

References 50 publications

The urogenital papillae as an indicator of sexual maturity in male African catfish, Clarias gariepinus, (Burchell, 1822)

The urogenital papillae as an indicator of sexual maturity in male African catfish, Clarias gariepinus, (Burchell, 1822)

Pesticide Research on Environmental and Human Exposure and Risks in Sub-Saharan Africa: A Systematic Literature Review

Gill histopathological indicators in pikeperch Sander lucioperca larvae reared in a flow-through system: effect of clay-turbid water

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