Gabriel A. Dedeke

• PhD Zoology
• Professor (Full) at Federal University of Agriculture, Abeokuta

Cannabichromene (CBC) is the third most abundant non-psychoactive cannabinoid found in Cannabis sativa. It is reported to be responsible for some effects in users, ranging from psychological, neurodevelopmental, teratogenic to reproductive toxicity. Consequently, experimental evaluation of the mechanism of action and interaction seemed paramount. T...

Artificial light in various spectral is a relatively new development for modifying the environment of fish. According to research, light has a spectral and species-specific effect on fish.. As a result, the goal of this study was to see how different visible light colors affected Clarias gariepinus growth and digestive enzymes. 105 Juvenile fish (b...

Exposure to various spectral of light at night is presently inevitable, hence the need to examine its spectral effect on male reproductive function. This study aimed at evaluating the periodical change in testicular histomorphology of albino rats exposed to various lights spectral {Blue (BL), Green (GL), Yellow (YL), Red (RL), and White (WL)} at ni...

This study investigated the concentration of glyphosate in water (groundwater and surface), soil (top and sub) on cassava and maize farms within 3 farm settlements (Akufo, Ilora and Otiri Ipapo) from Ido, Oyo and Iseyin Local Government Areas of Oyo state, Nigeria. Samples of Top and sub soil were taken from the farms while water was collected from...

Reproductive dysfunctions in several fish species have been linked to eutrophication due to the presence of cyanobacteria which contain biotoxins known as microcystins. In this study, microcystin-LR (MC-LR) from microcystins cells was isolated from water samples of Eleyele and Iju rivers, as well as two Clarias gariepinus fish ponds (Pond A was fed...

The increase in microplastic pollution has raised concerns about environmental safety in recent years. These tiny, ubiquitous, and potentially toxic plastic particles can be discharged into the environment via weathering of plastic debris and microbeads. While microplastic research is gaining momentum in Nigeria, further understanding of microplast...

Exposures to Artificial Light at Night (ALAN) is on the increase with resultant varied physiological impact related to the light spectrum via the non-visual pathway. This study examined the effects of various spectra of ALAN on Testosterone (Te), Progesterone (Pr) and Estradiol (Es) in rats exposed to Blue (BL), Green (GL), Yellow (YL), Red (RL...

Background: Cannabis and cannabinoids affect almost every system of the body and exert systemic effects such as alterations in memory and cognitive functions, neurotransmission impediment, as well as obstruction of endocrine and reproductive system functions. Reproduction is a complicated phenomenon that integrates biological, psychological and be...

COVID-19 is a highly infectious respiratory disease that resulted in a global pandemic that has affected every stage and sector of life. Although it is mainly seen as a health issue, its impacts and ripple effects also resonated in the education, technology, agriculture, and research fields, creating socio-economic disruptions across the globe. In...

Exposures to Artificial Light at Night (ALAN) is on the increase with resultant varied physiological impact related to the light spectrum via the non-visual pathway. This study examined the effects of various spectra of ALAN on Testosterone (Te), Progesterone (Pr) and Estradiol (Es) in rats exposed to Blue (BL), Green (GL), Yellow (YL), Red (RL), W...

There is an increasing overdependence and use of atrazine herbicide for the control of pre-and post-emergence broad leaf weeds on maize farms in rural agricultural communities in Nigeria. We carried out a survey of atrazine residue in 69 hand-dug wells (HDW), 40 boreholes (BH) and 4 streams from all the 6 communities (Awa, Mamu, Ijebu-Igbo, Ago-Iwo...

No recognized study has been conducted in rural agricultural areas in Nigeria to monitor atrazine in drinking water and its potential health implications. Here, a total of 69 hand-dug wells (HDW), 40 boreholes (BH), and 4 streams were collected from the six (6) communities in Ijebu-North Local Government Area, Southwest Nigeria and analyzed for atr...

Nephrotoxicity of gasoline fumes has been documented, but the mechanisms underlying the toxicity remain vague. This study determined the residue of gasoline components in the kidney of 72 male albino rats with a view to providing the basis for a detailed understanding of the nephrotoxicity of gasoline fumes. The rats were randomized into 6 groups a...

The advent of spray drones for agrochemical applications calls for continuous exploration of potentially affordable and sustainable liquid biofertilizers. Thus, we evaluated the effects of earthworm urine foliar spray on the growth performance (height, number of leaves, leaf area, stem girth) and stomata opening of Amaranthus hybridus (Green amaran...

There are no available data on the level of atrazine in drinking water from rural agricultural areas in Nigeria and its potential health implications. Here, we measured atrazine residue in 69 hand-dug wells (HDW), 40 boreholes (BH), and four major streams from the six communities (Ago-Iwoye, Ijebu-Igbo, Oru, Awa, Ilaporu, and Mamu) in Ijebu North L...

No recognised study has been conducted to monitor atrazine residue in drinking water from rural agricultural areas in Nigeria and its potential health implications. In this ecotoxicological study, we monitored atrazine residue in 69 hand-dug wells (HDW), 40 boreholes (BH) and 4 major streams from all the 6 communities (Ago-Iwoye, Ijebu-Igbo, Oru, A...

No recognised study has been conducted to monitor atrazine residue in drinking water from rural agricultural areas in Nigeria and its potential health implications. In this ecotoxicological study, we monitored atrazine residue in 69 hand-dug wells (HDW), 40 boreholes (BH) and 4 major streams from all the 6 communities (Ago-Iwoye, Ijebu-Igbo, Oru, A...

Few studies have reported reproductive toxicity of gasoline fumes in animals, but none of the findings has been fully ascertained and the mechanism underlying the observed toxicity still remains unknown. Here we present insights into the potential mechanism underlying the reproductive toxicity of gasoline fumes in 72 adult male albino rats randomly...

Artificial light at night is considered as environmental stressor depending largely on the spectra. Haematological parameters have been used as bio-indicator of stress when animals are subjected to unfavourable environmental condition. Hence this study evaluated the effect of various spectra of light on the haematology of albino rats. Day old rats...

Soil transmitted helminth (STH) infections are among the most common human infections worldwide with over 1 billion people affected. Many estimates of STH infection are often based on school-aged children (SAC). This study produced predictive risk-maps of STH on a more finite scale, estimated the number of people infected, and the amount of drug re...

Artificial light at night has been reported to have significant effects on the physiology and behaviour of animals by its impact on their circadian rhythm. This study investigated the effect of artificial light spectra at night on neurotransmitter activities and neurobehavioural changes in the albino rat. Blue (470 nm) and red (665 nm) lights were...

The mechanism underlying the reported hepatotoxicity of gasoline fumes in experimental studies still remains unclear. In this study, we present insights into the mechanism underlying hepatotoxicity of gasoline fumes in 72 male albino rats. The rats were randomized into six groups. Group I (control) was exposed to distilled water while groups II, II...

The mechanism underlying the reported hepatotoxicity of gasoline fumes in experimental studies still remains unclear. In this study, we present insights into the mechanism underlying hepatotoxicity of gasoline fumes in 72 male albino rats. The rats were randomized into six groups. Group I (control) was exposed to distilled water while groups II, II...

The mechanism underlying the reported hepatotoxicity of gasoline fumes in experimental studies still remains unclear. In this study, we present insights into the mechanism underlying hepatotoxicity of gasoline fumes in 72 male albino rats. The rats were randomized into six groups. Group I (control) was exposed to distilled water while groups II, II...

Exposure to artificial light of various colors at night affects the testicular weight and histomorphology of the testes of rats.

Background: Soil transmitted helminth (STH) infections are among the most common human infections worldwide with over 1 billion people affected. Many estimates of STH infection are often based on school-aged children (SAC). This study produced predictive risk-maps of STH on a more finite scale, estimated the number of people infected, and the amoun...

The desire to shore up the shortfall in protein supply, the increased awareness of the importance of cholesterol free animal protein, like guineafowl, and the need to conserve their wild genes, have necessitated studies on improved captive breeding of feral helmeted guineafowl. Hence, this study was aimed at determining the effects of ecological zo...

Background In addition to improving soil fertility and crop production, earthworms have been found to be useful in the removal of contaminants from soil, known as vermiremediation. Previous studies on vermiremediation have focused primarily on organic wastes, with relatively less attention paid to inorganic contaminants. In addition, some basic ter...

While the impact of glyphosate-based herbicides (GBHs) on earthworms has been studied, little is known about their effects on the earthworm gut microbiome. This study investigated the impact of a GBH on the gut microbial communities of three earthworm species (Alma millsoni, Eudrilus eugeniae and Libyodrilus violaceus). Earthworm species accommodat...

The impact of management systems on the African giant land snail, Archachatina marginata found in Abeokuta, Nigeria was investigated. The gut microbial load, haemolymph biochemical values (proteins, lipids, glucose, Na+, Ca2+,K+, Cl- PO42+) and proximate composition (crude protein, fat, fibre, ash and carbohydrates) of the flesh were determined in...

Oil exploration's devastation on health and the environment may far outweigh its economic benefits. An oil spill occurred at egbokodo River in Delta State, nigeria, thereby polluting the land and water bodies. the study was therefore aimed at evaluating the impacts of iron, lead, cadmium, and chromium on the zooplankton community structure of egbok...

In most endemic sub-Saharan African countries, repeated infections with soil-transmitted helminth (STH) occur as early as six weeks after the end of mass drug administration (MDA) with albendazole. In this study, we designed a new health educational board game Worms and Ladders and evaluated its potential to complement MDA with albendazole and redu...

Artificial light has been shown to enhance or delimit the activity pattern of animals and has been used to improve the productivity of poultry birds. The study, therefore, evaluated the impact of exposure to monochromatic lights on Giant African Land Snails (GALS), Archachatina marginata viz the proximate, lipid and amino acid profiles, and growth...

Background Ascariasis, Trichuriasis and Hookworm infections poses a considerable public health burden in Sub-Saharan Africa, and a sound understanding of their spatial distribution facilitates to better target control interventions. This study, therefore, assessed the prevalence of the trio, and mapped their spatial distribution in the 20 administr...

The aim of the study was to comparatively analyze the interrelationships among iron (Fe), manganese (Mn), zinc (Zn), copper (Cu), lead (Pb), cadmium (Cd), chromium (Cr) and total hydrocarbons (THCs) in the gills, intestines and muscles of Clarias gariepinus collected from Osse River, Nigeria, between the periods of April, 2013 to September, 2014. T...

Wormcasts produced by three earthworm species (Alma millsoni, Eudrilus eugeniae and Libyodrilus violaceus) exposed to a glyphosate-based herbicide reduce growth, fruit yield and quality of tomato (Lycopersicon esculentum)

It remains unknown if casts produced by earthworms exposed to a glyphosate-based herbicide (GBH) will retain their agricultural benefit. This study investigated the agricultural importance of surface casts produced by three earthworm species (Alma millsoni, Eudrilus eugeniae and Libyodrilus violaceus) exposed to a GBH on growth, fruit yield and qua...

This study investigated nutritional and phytochemical properties of three multipurpose savannah plants: Eucalyptus camaldulensis, Hibiscus sabdariffa and Morinda lucida. Proximate, mineral and anti-nutrient contents of leaves, stems and roots of the plants were determined. Data obtained were analysed using Statistical Analysis System (SAS). One way...

Exposure to Artificial Light at Night (ALAN) is recently a major concern in the globe. The physiological impact of artificial light is however related to spectrum to which animal is exposed. Animals have been used as a model in evaluating factors that can have an impact on human hence Rattus norvegicus was used for this study. This study therefore...

The global use of glyphosate-based herbicides (GBHs) and release of glyphosate residues in soil environment have over the years been a major concern. In this study, we aim to evaluate the biochemical response and vermiremediation potential of three indigenous earthworm species; namely Alma millsoni, Eudrilus eugeniae and Libyodrilus violaceus in GB...

The global use of glyphosate-based herbicides (GBHs) and release of glyphosate residues in soil environment have over the years been a major concern. We evaluated the response and vermiremediation potential of three indigenous earthworm species (Alma millsoni, Eudrilus eugeniae and Libyodrilus violaceus) in GBH treated soils. Three weed plants (Tri...

Over exploitation of marine resources pose a threat to their population and ultimate survival. Sea turtle is one of the endangered marine species whose conservation must be taken seriously because of their economic advantages. Human interferences with sea turtle habitat and procreation process have been observed to be one of the main causes of redu...

Background Ascariasis, Trichuriasis and Hookworm infections poses a considerable public health burden in Sub-Saharan Africa, and a sound understanding of their spatial distribution facilitates to better target control interventions. This study, therefore, assessed the prevalence of the trio, and mapped their spatial distribution in the 20 administr...

We provided information on the spatial relationship between STH transmission and climatic and other environmental risk factors (more precisely access to WASH resources).

Improved access to Water, Sanitation and Hygiene (WASH) resources have been advocated as a complementary intervention to reduce transmission of Soil-Transmitted Helminth infections (STH), However, the spatial relationship between STH and WASH resources has not been established. This study, therefore, mapped the distribution of STH and WASH resource...

There have been growing concerns and uncertainty about reports attributing the metabolic disturbance induced by a commercial formulation of glyphosate-based herbicide to its active ingredient. We therefore compared the effects of Roundup Original® and its active ingredient glyphosate on some hypothalamic-pituitary-adrenal (HPA) hormones and oxidati...

Damage of stored cowpea by the weevil, Callosobruchus maculatus, is of great concern in Nigeria. The study investigated the potential of light spectra in the control of the bean weevil; In the first trial, ten individual bean weevils were directly irradiated with green, yellow, red and white and ambient(control) light generated by electric bulbs at...

The control and or eradication of Mosquito, the vector of Plasmodium, is a major aspect of the prevention or eradication of malaria. The study investigated the potential of visible light spectra in the control of mosquito. Mosquito larvae were irradiated with light (blue, green, yellow, red and white lights) two hours daily (8am – 10am) for fourtee...

The study explored, examined and simulated some selected abiotic factors observed at biodiversity hotspots of Osse River, located in the tropical Rainforest, Edo State, Nigeria. The study was aimed at providing information required for sustainable shrimp husbandry. The research rationale was that the stress levels in shrimps are absolutely a functi...

The study investigated oxidative stress induced by Aflatoxin B1 (AFB1) in selected palaemonid shrimps. The shrimps were fed with Aflatoxin B1 of 0, 2, 5, 10, 20, and 40 μg/kg in mixtures of shrimp feed. The impact s of the concentrations on the growth rate of the shrimps and the induced Oxidative stress were assessed. Growth rate was estimated usin...

Educational programmes have for long been used in biodiversity conservation; however introduction of board games in these efforts is a new concept, which is believed, will result in greater achievements. This study developed and used a new educational board game, biodiversity loss and conservation game (BLACOG) and a test-questionnaire to appraise...

There have been major concerns that the nephrotoxicity of commercial formulations of Roundup herbicide is due to the active ingredient glyphosate. We therefore investigated and compared the mechanisms underlining the nephrotoxicity of Roundup herbicide and glyphosate alone in rat. Fifty-six adult male rats randomized into 7 groups of 8 rats per gro...

Quarrying activities are known to have debilitating effects on the environment. The recent creation of a quarrying site along the FUNAAB-Alabata route of Odeda Local Government Area of Ogun State, SW Nigeria has drawn fears of the effects this could have on biodiversity. The present study therefore appraised the diversity and abundance of snails in...

Three aquatic products, tilapia fish, lobster and crab, were collected from the landing site of fishermen in Makoko, a fishing suburb in Lagos State, Nigeria. They were analyzed for their proximate composition, and concentration of heavy metals (Cr, Cd, and Pb) was also measured in them. The nutrient values varied among the three organisms. The lob...

This study investigated the potential of light spectra as a non-insecticidal means of controlling mosquito, the vector of Plasmodium (malaria parasite). The developmental stages of Mosquito including larva, pupa and adult were exposed to 25 watt incandescent bulbs of various colours (blue, green, yellow, red and white). The result from this study s...

This study tested the effects of Roundup herbicide, (Monsanto Europe S.A. /N.V., Antwerp, Belgium, O611, F- 1059 3379) in a commercial formulation (360 g /L of glyphosate in the form of 441 g/L potassium salt), on the reproductive and kidney functions in albino rats. Our study has shown that Oral exposure to glyphosate-based Roundup herbicide has t...

The increase in the frequency of exposure to gasoline fumes and the growing incidence of infertility among humans has been a major concern and subject of discussion over the years in Nigeria. We therefore present the reproductive effect of gasoline fumes on inhalation exposure in 40 male albino rats. The rats were randomized into five experimental...

The study investigated the effect of exposure to monochromatic lights (ambient – control, blue, red, yellow, white) on haematology, plasma electrolytes, growth hormone and weight changes in albino rat (Rattus norvegicus). Albino rats were exposed to lights of varying wavelengths (15 watts energy saving fluorescents) from suckling age to 63 days; th...

The use of freshwater invertebrates as bioindicator of heavy metal pollution is an important tool for environmental biomonitoring. This study investigated antioxidant activities and DNA profile in two limicolous earthworms (Alma millsoni and Libyodrilus violaceus) and freshwater prawns (Macrobrachium vollenhovenii) at selected points of Ogun River,...

This cross-sectional study was undertaken to assess the status of school-based water, sanitation and hygiene (WASH) resources and soil-transmitted helminthiasis (STH) in Odeda, Ogun State, Nigeria. The status and condition of WASH resources were determined in eight selected schools (three with WASH support and five without). Stool samples were also...

Increasing use of glyphosate-based herbicides and reported presence of its residues in foodstuffs has increased individual's exposure to the herbicide. The route of elimination of imbibed glyphosate from the body is via the kidney. In this study, we present the effect of glyphosate on the kidney of adult male albino rat at after oral exposure to Ro...

The quest to satisfying the daily industrial and household need of gasoline in Nigeria has increased individuals' exposure to its fume. This study therefore, aims at investigating the hepatotoxic effect of inhalation exposure to gasoline fume on forty adult male albino rats. The rats were randomised into five treatments (T) with eight rats per trea...

The study evaluated the impact of exposure to monochromatic lights on the haemolymph electrolytes (K, Ca, Mg and Na) concentrations, acetylcholinesterase and melatonin activities in Giant Africa Land Snail (GALS), Archachatina marginata. Ninety snails were exposed to six experimental treatments, in three replicates of five snails each, comprising o...

Toxic effects of gasoline fumes have been reported, but evidence of its hepatotoxicity and genotoxicity are rare. Therefore, this study assesses hepatotoxicity and genotoxicity of gasoline fumes on forty Albino rats randomly assigned to five experimental treatments (T) with eight rats per treatment (T1, T2, T3, T4 and T5). T1(Control) was housed in...

The incidence of infertility in human is on the increase and the use of Roundup herbicide and presence of its residues in foodstuff is a major concern. This study therefore aim to assess the effect of Roundup on the reproductive capacity of 32 adult male albino rats randomized into 4 groups of 8 rats per group orally exposed to Roundup at 3.6 mg/kg...

Gasoline fume has been considered a major air pollutant affecting the heart, lungs, brain, liver and kidneys. Therefore, this study aims at investigating the effect of inhalation exposure to gasoline fume on some endogenic stress hormones and oxidative enzymes of albino rats. Forty adult male albino rats were randomly assigned to five experimental...

The high dependence on gasoline in Nigeria has resulted in frequent exposure of attendants to the vapour and its inadvertent inhalation. In addition, drug addicts have been reported to wilfully sniff the vapour in order to get high. All these with likely dire consequences. The present study investigated the impact of gasoline vapour inhalation on t...

Depletion of biodiversity in Nigeria is a major environmental problem and a serious threat to livelihood and the quality of life. It is very important that future development programmes aggressively develop environment and sustainable development education and training to educate current and future generations, enabling them to meet the challenges...

p>The use of Glutathione-S-transferase (GST) activities in earthworm tissue as tool for assessment of heavy metal pollution in abattoir soils was evaluated in this study. Five (5) replicates each of earthworm species ( Libyodrilus violaceous , Eudrilus eugeniae and Alma millsoni ), soil and rumen waste samples were collected from three (3) abattoir...

The use of gasoline in industries and homes in Nigeria has rapidly increased in the recent times and in the course of usage, individuals are frequently exposed to pollutants from the gasoline fume. Adverse effects of gasoline exposure has been reported (Uboh et al., 2010; Uboh et al., 2008) but evidence of its toxicological effect on male gonad is...

A steady rise in the patronage for Traditional African Medicine (TAM) has necessitated a corresponding increase in the demand for the ingredients used in the preparation of the tradomedicines. These ingredients are the various wild animals and plants parts. The attendant rise in this demand for ingredients calls for a need to document the extent of...

Activities in abattoirs and direct release of its waste into the environment are on the increase due to high protein demand in the country, and there is a need for proper assessment of abattoir soil for pollution. This study aims to evaluate bioaccumulations of heavy metals in indigenous earthworm from abattoir soils as a measure of pollution. Five...

Glutathione-S-transferase production in earthworm as a tool for assessment of heavy metal pollution in abattoir soil. The use of direct response of animals to environmental challenges by production of biomarkers is a current better tool to assess environmental pollution than the conventional methods. This study aims to measure Glutathione-S-transfe...

Activities in abattoirs and direct release of its waste into the environment are on the increase due to high protein demand in the country, and there is a need for proper assessment of abattoir soil for pollution. This study aims to evaluate bioaccumulations of heavy metals in indigenous earthworm from abattoir soils as a measure of pollution. Five...

Heavy metal arising majorly from anthropogenic sources finds its way into freshwater bodies. Sentinel freshwater organisms accumulates this pollutant into their living tissues. This accumulation process initiates biochemical response and alter DNA profile of these organisms. This study evaluated the antioxidant enzyme activities and DNA profile in...

The use of direct response of animals to environmental challenges by production biomarkers is a better tool to assess environmental pollution than the conventional methods. In this study, the production of metallothionein (MT) in earthworms (Libyodrilus violaceous, Eudrilus eugeniae and Alma millsoni) were measured as tools for assessing heavy meta...

Glutathione-S-transferase production in earthworm as a tool for assessment of heavy metal pollution in abattoir soil. The use of direct response of animals to environmental challenges by production of biomarkers is a current better tool to assess environmental pollution than the conventional methods. This study aims to measure Glutathione-S-transfe...

Obesity, resulting from energy imbalance caused by an increased ratio of caloric intake to energy expenditure is a global health problem. This study investigated the effects of Sorghum bicolor leaf extracts (SBE) on blood lipid levels in high fat diet-induced obese rats. Sorghum bicolor leaf was extracted with 70% ethanol using Soxhlet extractor. M...

The study was conducted to determine earthworm cast biomass under three managed ecosystems, Gmelina, Cashew and Banana plantations at Federal University of Agriculture, Abeokuta and its impact on the soil physicochemical parameters. Seven, five and four plots of 3 m2 each were sampled in Gmelina, Cashew and Banana plantations respectively. Each plo...

Tel: +234 val (2002), that nutrients from both particles of organic and inorganic matter that would otherwise remain unavailable to plants are liberated in castings. The humus-rich earthworm casting has been shown to play important role in soil fertility and productivity. According to Faniran and Areola (1980) earthworm casting stores and supplies...

The prospect of vermiculture in the south-western coast of Nigeria was studied. One hundred and two respondents were interviewed in the three coastal towns of Badagry, Epe and Igbokoda. The results show that 94% of respondents made use of earthworms as fish bait, 37% buy their worms and 57% collected by themselves. The respondents, who buy, however...

Malaria in Nigeria is treated blindly in most cases and where diagnostic measures exist, efficacies of several are still in doubt. This study evaluated performance of microscopy and rapid (RDT) methods in confirming prevalence of malaria parasites (MP),parasite species and percent parasitized red blood cells in 384 persons systematically selected f...

Malaria caused by Plasmodium species is often observed in areas where malaria is endemic. Malaria prevalence in metropolitan Abeokuta of Ogun State, Nigeria was studied between October, 2012 and January 2013. Oral interviews were used to get personal data of participants. Blood samples were obtained from 384 consented participants from the seven pr...