Papers by Toheeb Lekan Jolaosho
Sustainable Development, Wiley Online Library, 2026
The dynamic nature of small islands being geographically isolated and their perceived connectedne... more The dynamic nature of small islands being geographically isolated and their perceived connectedness with global networks complicates research attempts to draw general conclusions on whether insularity leads to marginalization or strengthens their resilience for sustainable development. This review develops a conceptual vulnerability framework to examine how the geographic particularities of Gran Canaria and Lesvos Islands exacerbate their vulnerabilities through the lens of geophysical, socioeconomic, and environmental dimensions, and also their resilience-building capacities. This review identified eligible studies through systematic searches from two databases (Web of Science and Scopus), and only peer-reviewed articles published between 2000 and 2025 were included. This paper revealed that limited spatial accessibility, uneven connectivity to global networks, and dependence on external sources are major geophysical consequences facing both islands. Market structures in both islands remain weak, which contributes to low business viability and high unemployment rates. This paper identifies the major drivers of frequent irregular migration and the associated refugee crisis, particularly on Lesvos. This review demonstrates how overreliance on tourism limits economic diversification and drives environmental and infrastructural strains, especially in Gran Canaria. This review found that both islands are dealing with the impacts of climate variability and extreme weather events such as flooding, water scarcity, landslides, rockfall, and coastal erosion. This review highlights the key strengths and limitations of the policy interventions (infrastructural, social, economic, and ecological resilience capacities) of both islands. This review then proposes holistic strategies for addressing these inherent vulnerabilities in the process of global social, economic, and environmental changes. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Lagoon systems in Nigeria serve as essential ecosystems for fisheries and local livelihoods, yet,... more Lagoon systems in Nigeria serve as essential ecosystems for fisheries and local livelihoods, yet, they face increasing threats from industrial discharges, agricultural runoff, and urban pollution, which may degrade water quality and pose health risks to coastal communities. This study comparatively assesses how varying anthropogenic activities influence the physicochemical properties and heavy metal levels in surface waters of Nigeria's interconnected coastal lagoons and also evaluates the contamination indices, pollution sources, and human health risks. The physicochemical parameters were; pH (6.86-6.97), dissolved oxygen (4.39-5.91 mg/L), total suspended solids (20.81-21.74 mg/L), electrical conductivity (26.28-217.11 uS/cm), and total dissolved solids (61.82 mg/L) and were within the recommended limits, except for TDS. The distribution trends and average levels of heavy metals were as follows: Zn (1.98-4.60 mg/L) > Fe (0.59-3.79 mg/L) > Cu (0.18-3.10 mg/L) > Cr (0.02-0.785 mg/L) > Pb (0.30-0.50 mg/L) > Cd (0.15-0.41 mg/L) > As (0.05-0.06 mg/L) > Ni (0.02-0.06 mg/L). Heavy metal concentrations were highest during the dry season, and the spatial analysis revealed that the concentrations of Cd, Pb, and As were highest at stations LE6 and LE9 in Lekki Lagoon, indicating areas primarily influenced by agriculture, tourism, and dredging activities. In Lagos Lagoon, stations LA1, LA3, and LA5 presented the highest levels, mostly contaminated with Cd, Cr, and Pb, corresponding with locations dominated by industrial wastewater discharge, crude oil processing, shipping activities and leaching oil from abandoned power plants. The integrated pollution and water quality indices revealed that approximately 90% of the sampling stations of both lagoons presented moderate to extreme contamination levels, rendering the water unsuitable for drinking, with potential uptake, accumulation, and ecological risks for important ecosystem functions. Multivariate analysis revealed that the elevated heavy metal concentrations in both lagoons originated primarily from diverse anthropogenic activities. The health risk assessment revealed that ingestion of Cd, Cr, and As poses the highest threat to human health, with most of the sampling stations, especially in Lagos Lagoon, presenting potential non-cancer and carcinogenic health risks, with children being the most vulnerable group. Our findings showed that both lagoons are highly contaminated irrespective of the varying anthropogenic influences. Thus, we recommend stringent monitoring of land use and contaminant sources, implementation of targeted remediation at high-risk sites, and development of integrated coastal-zone management strategies to protect the lagoon ecosystems and human health.
Aquaculture Science and Management, BMC, SpringerNature, 2025
Preliminary research on the domestication of the mangrove fisheries resources especially those wi... more Preliminary research on the domestication of the mangrove fisheries resources especially those with high aquaculture potential, is mandatory towards achieving sustainable, nutrient-rich food sources that can reduce protein and micronutrient deficiencies in coastal and food-insecure regions. This study evaluates the domestication chances, survival, growth performance, length-weight relationship, and chemical composition of African rainbow crabs (Cardisoma armatum) fed compounded diets from plant and animal sources. A total of ninety (90) C. armatum individuals (mixed sex), with an average body weight of 23.97 g, carapace length of 3.56 cm and carapace width of 4.37 cm were used in this study. They were allocated to three treatment groups [complete source diet (control), plant source diet, and animal source diet], each with three-unit replicates, and each experimental unit was stocked with ten individuals. The crabs were cultured for 16 weeks and fed 3% of their body weight. After the completion of the feeding trial, the crab tissues were manually collected from their bodies, processed, and analyzed for their biochemical composition. The final body weights were 112.45 ± 7.14 g for C. armatum fed a complete diet, 99.98 ± 4.34 g for a plant source diet, and 120.85 ± 2.69 g for an animal source diet. The crabs fed the animal source diet had the overall best growth rate, while the highest survival rates (66.67%) were recorded for the crabs fed the complete source diet. The results obtained for the length-weight relationship of the crab samples showed a negative allometric growth pattern (b < 3). The condition factor (k) values for females, males, and pooled sexes were greater than 1. Molting process occurred but no egg development was observed during the experiment. The chemical contents of the C. armatum samples showed that the choice of ingredients utilized in feed formulation influenced the crude protein, total ash, calcium, and sodium contents of the experimental crabs.
Ecotoxicology and Environmental Safety, 2025
Most of the literature on microplastics (MPs) focuses on freshwater or terrestrial ecosystems, fr... more Most of the literature on microplastics (MPs) focuses on freshwater or terrestrial ecosystems, frequently overlooking their interconnections with the marine environments. This oversight is worrying given that both ecosystems serve as primary pathways for the introduction of MPs into marine environments. This review synthesizes existing literature on MPs in both freshwater and marine ecosystems across all six continents. The most commonly produced plastic polymers in industry are polyethylene (36 %) and polypropylene (21 %), and studies revealed that these two materials are the most abundant in aquatic ecosystems. Primary and secondary MPs originate from a range of sources including land-based disposal, the ocean, airborne deposition, wastewater treatment facilities, automobiles, pharmaceuticals and personal care products, synthetic textiles, and insect repellents. Notably, secondary MPs, which are formed from the breakdown of larger plastic items comprise approximately 69-81% of marine debris, especially in urbanized, densely populated areas. The inconsistencies of the methodologies (sampling, extraction, and quantification) and the units employed for result presentations are part of the major limitations in MPs research. Environmental phenomena such as heteroaggregation, weathering, adsorption, leaching, and fragmentation are the major factors influencing the behavior, fate, and degradation process of plastic particles. The physicochemical properties of plastic polymers, such as density, crystallinity, as well as bioturbation, meteorological forces, and wind actions, including currents, waves, and tides, are responsible for biofouling, aggregation, sinking into the bottom sediment, resuspension, and the vertical, horizontal, and spatiotemporal distributions and transport of MPs. The potential solutions to mitigate plastic pollution are grounded in the 3Rs framework, which includes reducing production and consumption, advancing the biotechnological, chemical and microbial development of degradable polymers, promoting reusable plastic products with lower environmental impacts over their lifetimes, and recycling waste into new products. The regulatory policies on single-use plastics commonly involve permanent bans and financial penalties for violators. In addition, nations such as the United States, the Netherlands, and northern Europe have introduced economic incentives to encourage the return of reusable materials to reduce plastic waste and the resulting envrionmental pollution.
One health, Elsevier , 2025
Health considerations are seldom integrated into non-state voluntary sustainability certification... more Health considerations are seldom integrated into non-state voluntary sustainability certification standards, despite industrial fishing being one of the most hazardous occupations, often resulting in significant health risks for fishers. These challenges not only affect individual fishers but also have broader implications for the socioecological sustainability of fisheries. This study explores the effects of certification programs on industrial fishing activities and their health and safety dimensions within a socio-ecological framework, focusing on the Atlantic shrimp fishery in Nigeria. A mixed-methods approach was employed, combining qualitative and quantitative data collection techniques. Data were gathered from experienced employees of Friend of the Sea (FOS) certified and non-certified (Business-as-Usual, BAU) industrial fisheries through questionnaires, complemented by semistructured interviews with selected key informants. The study examines the relationships between demographic variables, health-related indicators, and certification program participation using multivariate analyses, including Chi-square and standard logistic regression models. The findings revealed that fishers participating in the FOS certification program reported better health conditions, lower risks, and higher insurance coverage levels than their BAU counterparts. Certified fishers had greater access to sick leave and annual days off and were more likely to be physically fit for work. Conversely, fishers in the BAU group faced significantly higher health risks and casualty rates during fishing operations. These results underscore the critical role of health-focused certification programs, such as FOS, in improving the well-being of fishers, thereby enhancing the socio-ecological sustainability of Nigeria's shrimp fishing industry. The study highlights the importance of integrating health considerations into sustainability certification standards. By prioritizing fisher's safety and well-being, such programs contribute to the sustainable management of fisheries resources and environmental protection, aligning with the principles of the One Health framework.
Chemosphere, Elsevier , 2024
This study examines potentially toxic elements (PTEs) in leachates from three landfills (active a... more This study examines potentially toxic elements (PTEs) in leachates from three landfills (active and closed sites) to quantify and compare their degree of toxicity and percolation effects on aquifer groundwater based on distance zonation. The finding revealed that the active landfill leachates had higher concentrations (P < 0.05) of PTEs, with EC, TDS, Cd, Cu, Fe, Zn, Pb, and Mn being above the standard limits for wastewater. The leachate pollution index confirmed high toxicity of the active sites. The geospatial maps suggest that the aquifer was influenced by leachate migration effects, with the groundwater situated within 100 m of the landfills exceeding the regulatory limits. Based on the Ficklin-Caboi assessment, the groundwaters were categorized into “low metals—near neutral” and “high metals—near neutral." The contamination degree, heavy metal contamination index, groundwater quality index, and water pollution index denote that over 40% of the groundwaters are “highly to extremely” polluted and are unfit for drinking, while over 50% are “excellently pure." The geospatial maps revealed that all the groundwaters within 100 m of the landfills are polluted, especially those near the active landfills. The prevailing factors impairing the quality of groundwater were Pb >Cd >TDS >Fe >EC >Cr >pH > Mn > Se > Co. The correlation coefficients, principal components, and cluster analyses confirmed the heterogeneous nature of the landfills and that the solid wastes were mainly from industrial, commercial, and household sources. Aside from the migration effect of leachates, other anthropogenic and geological factors are influencing the aquifer systems. The health risk assessment showed that the groundwaters within 100–500 m of the landfills are capable of causing noncarcinogenic and cancer health risks in exposed populations, with children
and those within the distance of 100 m being the most vulnerable groups.
Heliyon, Elsevier , 2024
health risk assessment (Hazard Quotient and Hazard Index) showed that exposure of adults to the i... more health risk assessment (Hazard Quotient and Hazard Index) showed that exposure of adults to the investigated groundwaters could result in noncarcinogenic adverse effects. The cancer risk values also exceeded the minimum limit (1.0 x 10 − 6) and thresholds (1.0 x 10 − 4) for adults, indicating the carcinogenic potential of the groundwater.
Marine Pollution Bulletin, Elsevier , 2024
This study examined ten heavy metals in five species: Macrobrachium vollenhovenii, Penaeus monodo... more This study examined ten heavy metals in five species: Macrobrachium vollenhovenii, Penaeus monodon, P. notialis, Chloroscombrus chrysurus, and Pseudotolithus typus, from Makoko floating slum, Lagos Lagoon to discern their bioaccumulation potentials, sources of origin, and health implications. The concentrations were in this order: Fe (4.172–10.176) > Zn (1.310–5.754) > Mn (0.475–2.330) > Cu (0.238–1.735) > Pb (0.121–0.391) > Cd (0.055–0.283) > Co (0.056–0.144) > Ni (0.039–0.121) > Cr (0.022–0.095) > As (0.003–0.031) mg/kg. The MPDI denotes “low toxicity,” and the BAF/BSAF revealed that benthic species had higher bioconcentration potentials. Multivariate analyses revealed that heavy metals exhibited mutual relationships during chemical transport, and their sources were both geogenic and human-induced. The HI values were below 1, and the TCR values were below the threshold of 1 × 10− 4. This suggests that the probabilities of noncancer and carcinogenic risks in human populations due to long-term consumption of the evaluated species are unlikely.
Journal of Trace Elements and Minerals, Elsevier , 2024
Background: Lagos and Ologe Lagoons are parts of the Lagos Lagoon Complex, which provide fish as ... more Background: Lagos and Ologe Lagoons are parts of the Lagos Lagoon Complex, which provide fish as an animal protein source to the locals. However, these fish species have a high propensity to accumulate pollutants including Potentially Toxic Elements (PTEs) from their environment. This potentially constitutes a health risk to fish consumers. Therefore, this study investigated concentrations of some PTEs (As, Cd, Cr, Cu, Fe, Pb, Ni, and Zn) in water, sediment, and fish (Sarotherodon melanotheron) from Lagos and Ologe Lagoons, the ecological and health risks associated with the consumption of the fish as well as the likely sources of the PTEs. Methods: Water, sediment, and fish (S. melanotheron) samples were collected monthly for ten months (June 2022-March 2023) from three sites: Badore and Baiyeku in Lagos Lagoon and Ologe Lagoon. The concentration of PTEs was determined in the environmental matrices {water, sediment, and three organs (gill, muscle, liver)}. The range of values for method detection limits (MDL), limits of detection (LOD), limits of quantitation (LOQ), and recovery rates were 0.01-0.025 mg kg − 1 , 0.00002-0.002 mg L − 1 , 0.0001-0.0067 mg L − 1 and 97.19±2.45-99.85±1.16% respectively. The ecological risk of PTE in water and sediment was assessed by various indices. Estimated dietary intake (EDI), health risk index (HRI), and target hazard quotient (THQ) were the human health risk assessment indices employed. The distribution and source of the PTEs were analyzed using the coefficient of variation, Pearson's correlation matrix, principal components analysis, and hierarchical cluster analysis. Results: The water and sediment quality assessment indices indicated that the water and sediment from the lagoons had low contamination with respect to the eight PTEs studied. EDI values were generally less than 1 except for Fe and Zn. THQ for all PTEs in the three sampling stations and across the different population groups was less
Environment, Development and Sustainability, Springer , 2023
Non-state sustainability initiatives, such as eco-certification and voluntary sustainability stan... more Non-state sustainability initiatives, such as eco-certification and voluntary sustainability standards, are eco-friendly, market-driven, and privately managed initiatives that garner support from concerned stakeholders in the blue economy. Consequently, these initiatives play pivotal roles in enhancing resource sustainability within the seafood sector. However, despite their importance, the intricacies of how non-state seafood sustainability schemes operate within the blue economy remain unclear. Therefore, this study examines the interactions of these non-state actors within institutional, social, and ecological contexts to improve common resource management. This study is based on a comprehensive review of secondary data from the literature to delineate its scope. In recent years, there has been an increase in non-state initiatives advocating for sustainable fisheries and the sustainable use of natural blue resources. These initiatives claimed to exhibit established institutional, social, and ecological synergies, yet the foundational principles guiding them remain underexplored. It is essential to note that addressing the long-term sustainability issues in the socioeconomic-ecological systems requires the resilience shift of non-state initiatives. Thus, non-state institutions must strengthen their resilience management capabilities by collaborating with other actors, networks, and institutions to promote sustainable development. This collaboration fosters societal understanding of these resilience factors, which are portrayed in this study. Finally, effective resource management necessitates a delicate balance between economic considerations and environmental preservation, supporting the sustainability of common resources. It is imperative to deepen our understanding of the interplay between the socioeconomic and ecological facets of these systems to ensure that our environmental laws serve as the proper framework for effective resource regulation and management.
Environmental monitoring and Assessment, Springer, 2024
The study investigates the occurrence and bioaccumulation of heavy metals in water, sedi- ment, f... more The study investigates the occurrence and bioaccumulation of heavy metals in water, sedi- ment, fish, and prawn from the Ojo River with a view to identify the source of origin and the associ- ated ecological and human health risks. The result shows that heavy metal concentrations in water [As = 0.010, Cd = 0.001, Cr = 0.041, Cu = 0.019, Co = 0.050, Fe = 0.099, Pb = 0.006, Ni = 0.003, and Zn = 0.452(mg/L)] were within the acceptable lim- its. The heavy metals in the sediment [As = 0.050, Cd = 0.287, Cr = 0.509, Cu = 0.207, Co = 0.086, Fe = 33.093, Pb = 0.548, Ni = 0.153 and Zn = 4.249 [mg/kg)] were within their respective background levels or earth’s crust and the TEL and PEL stand- ard limits. The bioaccumulation of heavy metals in fish and prawn tissues are in this hierarchical form: Fe>Zn>Cu>Cr>Ni>Co>Pb>Ar>Cd and Fe> Zn>Cu>Cr>Pb>Ar>Ni>Co>Cd, respectively. The bioaccumulation factors of heavy metals in fish ranged from 0.893 - 16.611 and 1.056 - 49.204 in prawn, which were higher than the biota-sedimen- tation factors (BSAF) values, inferring that the fish and prawns of this study ingested heavy metals highly from water column. The aggregated BSAF scores (fish=5.584 and prawn=9.137) showed that these organisms are good concentrators of heavy metals in sediments. The water quality index and other pol- lution indices (Single pollution index, Heavy metal assessment index, and Heavy metal pollution index) demonstrates slightly clean water, with a moder- ate level of contamination. The HI values of heavy metals in water, fish, and prawn were lower than 1, implying non-carcinogenic risk in children or adults. The ADD and EDI values of the metals were within their respective oral reference doses (RfD). The TCR values showed that exposure to water, either by inges- tion or dermal absorption and the consumption of P. obscura and M. vollenhovenii from the Ojo River would not induce cancer risks in people, though As, Cr, Cd, and Pb showed carcinogenic potentials. The sediment contamination indices such as CF, mCd, EF, and Igeo showed a moderate level of pollution. The ecological risk values (NMPI, mCd=0.068, PLI=0.016, and R.I=86.651) of heavy metals implies “no-moderate risk” except for Cd, which showed high risk. The ecotoxicological parameters, m-PEL-Q (0.024) and m-ERM-Q (0.016) denotes low contamination and no probability of acute tox- icity. The CV analysis showed high dispersions and variabilities in the distributions of the heavy metals in water. Other source analyses (Pearson’s correla- tion matrix, PCA, and HCA) showed that both natural processes and anthropogenic activities are responsi- ble for the occurrence of heavy metals in water and sediment from the Ojo River.
Journal of Hazardous Materials Advances, Elsivier , 2023
The study was conducted to demystify the geochemical distributions of heavy metals in water and s... more The study was conducted to demystify the geochemical distributions of heavy metals in water and sediments from dredged and non-dredged riverine systems, with a view to ascertain the source, and the deleterious ecological and human health risks of these metals. Ojo and Badagry Rivers were considered as the dredge-mined sites, while Gbaji River was chosen as the non-mined site. The level of heavy metals in water samples are as follows; [Cd (0.040-0.360), Cu (0.010-0.130), Cr (0.001-0.080), Fe (0.170-1.040), Pb (0.001-0.050), Mn (0.050-0.230-), Zn (0.050-0.160), As (0.001-0.030), Co (0.003-0.040) and Ni (0.001-0.050) mg/L]. The Cd and Mn contents in the water from the mined sites were higher than their permissible limits. The heavy metal contents [Cd (0.190-1.490), Cu (1.390-5.950), Cr (1.180-2.630), Fe (144.820-261.490), Pb (1.960-24.250), Mn (5.170 to 24.110), Zn (5.180-35.420), As (0.170-0.690), Co (0.190-0.840) and Ni (0.740-2.140) mg/kg] in sediments are within the background levels, except for Cd from the mined sites. The hazard index was lower than 1 (HI ≤ 1), inferring no likelihood of non-carcinogenic incidents. Contrarily, the outcome of the cancer risk index revealed that exposure to sediments from the mined sites could lead to cancer risk. The contamination and enrichment factors of the sediments from mined sites showed "high contamination" and "extremely enriched," respectively. Notably, the potential ecological risk index of Cd (high) in sediments from the mined areas contribute significantly to the ultra-high risk of these ecosystems, which might result in ecological collapse of the riverine systems. The calculated Nemerow multifactor index (Y N) values of the mined sites implies extreme pollution. The coefficient of variation (CV), Pearson's correlation matrix, and principal component analysis (PCA) clearly indicate that heavy metals in water and sediments are from multiple rather than a single source. Although this study could not ascertain whether the mining activities are solely responsible for the elevated heavy metals in water and sediments from the dredge-mined sites since the study sites frequently experience other anthropogenic activities, the study showed that significant pollution and ecological adversities are associated with water and sediment from the dredged-mined sites.
Scientific reports, Nature, 2023
Periwinkle shells of Tympanotonus fuscatus, Pachymelania aurita, and Thais coronata were analyzed... more Periwinkle shells of Tympanotonus fuscatus, Pachymelania aurita, and Thais coronata were analyzed for their proximate composition, nutritionally significant minerals, trypsin inhibitors, and carotenoids. The mean values obtained were compared using an ANOVA test. The results showed that T. fuscatus had the highest mean moisture content of 0.96 ± 0.14% and a mean value of 0.49 ± 0.13% for crude fibre but was not significantly different (P > 0.05) from P. auritus. The crude protein and fibre content of T. fuscatus was significantly higher (P < 0.05) than other periwinkle samples. T. coronata had the highest mean total ash content and was significantly different (p < 0.05) from other periwinkle samples. T. fuscatus had the highest mean value for Mg (0.32 ± 0.03 mg/kg) and differed significantly (P < 0.05). The mean Ca content of P. aurita was not significantly different (P > 0.05) from that of T. coronata. The mean values of CaCO 3 in T. fuscatus, P. aurita, and T. coronata were 57.20 ± 2.46, 59.50 ± 3.23, and 62.36 ± 1.56 (mg/kg), respectively. T. coronata was significantly different (P < 0.05) from other periwinkle samples. The mean values of carotenoids in T. fuscatus, P. aurita, and T. coronata were 7.17 ± 2.14, 18.00 ± 5.27, and 11.20 ± 3.60 (mg/kg), respectively, and P. aurita was significantly different (P < 0.05) from other periwinkle samples. T. fuscatus and P. aurita had shells with significant amounts of trypsin inhibitor (23.30 ± 4.50 mg/kg and 22.90 ± 14.10 mg/kg, respectively), making them less suitable for livestock feed. In contrast, T. coronata had a lower mean value of 11.80 ± 7.19 mg/kg for trypsin inhibitor, making it an excellent addition to livestock feed. The low crude fibre and fat contents of the periwinkle samples in this study make them suitable for processing complementary foods, especially for hypertensive patients. The high percentage of CaCO 3 in periwinkle shells makes them a probable source used in the production of slurry for chromatography. The findings suggest that periwinkle shells contain specific minerals that can be applied in numerous industries. Increased use of these gastropod shells will result in successful application in product creation and a sustainable bio-circular economy. Freshwater mollusc are classified into gastropods (snails, periwinkles, freshwater limpets) and bivalves (oysters, clams, mussels) with two shells that have repeatedly established a colony in the freshwater aquatic ecosystem. Gastropods have only one shell (univalves), but the shape varies among major groups 1-3. They occur in freshwater and brackish ecosystems and are widely used as food in many countries. Periwinkles have a calcareous shell ranging in size from 10 to 30 mm. The shell is coiled in a series of whorls, which increase in diameter around the central region known as the columella, and it has a large oval opening where the body whorl terminates 4. They
Springer, 2023
Modeling sustainability involves using mathematical and computational methods to simulate and ana... more Modeling sustainability involves using mathematical and computational methods to simulate and analyze various aspects of sustainability. This includes resource use, environmental impacts, social and economic systems, and their interactions and interdependencies. The purpose of sustainability modeling is to help decision-makers understand and evaluate the potential consequences of different actions and policies and to support the development of sustainable solutions. Examples of sustainability modeling include life cycle assessment (LCA) models, which are used to assess the environmental impact of a product, process, or system over its entire life cycle. Energy systems models are used to analyze a region's energy demand and supply, taking into account factors such as energy efficiency, renewable energy sources, and emissions. Social-ecological models are used to analyze the interplay between social and ecological systems and to assess the impact of human activities on the environment. Climate change models are used to simulate the Earth's climate system and assess the impact of human activities on the climate. These models also evaluate the potential consequences of different mitigation and adaptation strategies. Finally, water resource management models are used to optimize the allocation of water resources for different uses. This involves considering factors such as water availability, quality, and demand.
Springer Journal, 2023
Bioeconomy; Blue growth; Ocean economy; Ocean sustainability Definition Although no specific defi... more Bioeconomy; Blue growth; Ocean economy; Ocean sustainability Definition Although no specific definition is designated for this term, this concept has been previously defined based on the field of application and utilization. The blue economy refers to the sustainable utilization of ocean and coastal resources for economic growth, improved livelihoods, and job creation while preserving the health of marine ecosystems. It is also regarded as an economic concept encompassing various economic activities in the ocean and coastal area, including traditional activities such as fishing, shipping, and shipbuilding, as well as newer activities such as offshore wind and wave energy, ocean-based aquaculture, and marine biotechnology. It is defined as the range of economic activities in the coastal zone and on the ocean, including shipping, fishing, oil and gas extraction, tourism, and renewable energy production. Generally, the blue economy mainly focuses on the responsible extraction and utilization of marine resources required to enhance ocean-based economies while adopting more balanced conservation measures to ensure resource sustainability.
International Journal of Clinical Biology and Biochemistry, 2022
Over the years, aquatic resources have reduced exponentially due to several factors particularly ... more Over the years, aquatic resources have reduced exponentially due to several factors particularly the influence of human activities. The aftermath of human activities on aquatic environment includes the depletion of species, breeding ground destruction, and fragmentation of the ecosystem and so on. Therefore, this study provides information on the Morphometrics, length-weight relationship, condition factor and guts content of P. elongatus from Mokoko River in Lagos State. The total of 398 fish samples was collected. The collection was performed once in a month for a period of six months, although not consecutive months but between January, 2021 to November, 2021. The highest mean body weight was obtained in the month of July (330±58.0g), while the lowest in September (38.4±70.0g). The month of May with the value of (550-4.3g) represented the widest fish range in a cohort while the least was observed in month of July (330-5.3g). The maximum total length (36.5±5.1cm) and standard length (30±4.3cm) was obtained in the month of July. The female had better sex ratio across the six months except for the month of March. The value of &#39;b&#39; (growth exponent) for male, female and combined sexes were below 3 indicating negative allometric growth pattern. The results on condition factor of females, male and combined sexes are greater than 1 except the result obtained in the month of March. For gut contents, four major diets (mud, earthworm, fish and crab) were observed indicating predatory nature while mud dominated the gut contents of the fish. The overall result indicated partially healthy ecosystem. Intensive monitoring of this water body should be mandated to ensure sustainability of the fishery. However, further studies in relation to the proximate composition and reproductive aspect of Bobo Croaker and other fish species from the study area should be done in order to update and provide more scientific information.
Life cycle sustainability assessment (LCSA) is a systematic and comprehensive evaluation approach... more Life cycle sustainability assessment (LCSA) is a systematic and comprehensive evaluation approach that assesses the full range of environmental, social, and economic impacts of a product, system, or process throughout its entire life cycle, from raw material extraction to end-of-life disposal. The purpose of LCSA is to identify and understand the trade-offs and potential sustainability challenges associated with the product, system, or process and to inform decisions that can enhance its sustainability. LCSA considers multiple sustainability criteria, including environmental impacts, such as greenhouse gas emissions, resource depletion, pollution, and waste generation; social impacts, such as labor practices, human rights, health, and safety; and community engagement and economic impacts, such as resource use, energy efficiency, cost, and economic viability. LCSA can be used by companies, governments, and other organizations to assess the sustainability of existing products, systems, and processes; identify opportunities for improvement; develop more sustainable products, systems, and processes; demonstrate sustainability leadership and meet stakeholder expectations; comply with sustainability regulations and standards; enhance brand reputation and customer trust; and make informed decisions on sustainability investments and initiatives.
Scientific reports, Springer , 2023
The study investigates some biological indices and chemical compositions of Callinectes amnicola ... more The study investigates some biological indices and chemical compositions of Callinectes amnicola and their potential for reuse in the context of the circular economy paradigm. The total of 322 mixed-sex C. amnicola collected over a period of six months was examined. The morphometric and meristic characteristics were estimated for biometric assessment. The gonads were obtained from the female crabs for gonadosomatic indices. The shell was obtained using the hand removal technique by detaching it from the crab body. The edible and shell portions were processed separately and subjected to chemical analysis. Our findings showed that females had the highest sex ratio across the six months. The slope values (b) for both sexes exhibited negative allometric growth across all months since the slope values obtained were less than 3 (b < 3). The values obtained for Fulton's condition factor (K) of crabs in all examined months were greater than 1. The edible portion had the highest moisture level at 62.57 ± 2.16% and varied significantly (P < 0.05). The high amount of total ash obtained in the shell sample showed that ash is the main mineral present in crab shells and showed a significant difference (P < 0.05). The shell sample had the highest concentrations of Na and CaCO 3. Based on the findings of this study, it was observed that the shell waste contains some essential and transitional minerals (Ca, CaCO 3 , Na, and Mg) and can be utilized as catalysts in several local and industrial applications, such as pigments, adsorbents, therapeutics, livestock feeds, biomedical industries, liming, fertilization, and so on. Proper valorization of this shell waste should be encouraged rather than discarding it.
Sustainable Fish Production and Processing, 2022
SN Applied Science, Springer Nature, 2022
The paradigm termed circular blue economy has become a concept that is greatly associated with th... more The paradigm termed circular blue economy has become a concept that is greatly associated with the utilization of marine resources to ensure continued sustainability. Several constraints and limitations related to plants and plant products means human needs to look beyond green economy. The chemical constituents of animals also allow researchers to evaluate their growth and development. This study evaluates the proximate and chemical compositions of Anadara senilis, Crassostrea gasar, and Mytilus edulis, with emphasizes on their calcium and calcium carbonate contents and industrial importance. A total of 270 live bivalve samples were collected from March to May 2021 from Lagos Lagoon harbour. Each bivalve sample collected was opened to separate the flesh from the species' shell, sun-dried and transported to the laboratory for analysis. One-way analysis of variance was adopted to estimate the significance level at 5% (P < 0.05). Post-HOC LSD test was performed to verify the disparity of mean. The results of this study revealed that Mytilus edulis shells had the highest moisture, crude protein, and crude fat at 1.15 ± 0.05%, 4.29 ± 0.43%, and 0.96 ± 0.15%, respectively and showed significant difference (P < 0.05). Anadara senilis shells had high levels of calcium (51.00 ± 2.87 mg/kg), magnesium (0.59 ± 0.23 mg/kg) and calcium carbonate (60.91 ± 2.50 mg/kg). Due to the high Ca and CaCO 3 contents obtained, these shells can be processed alongside other biomaterials into food supplements, animal feeds, dental products, plant nutrient supplements, ornamental purpose, construction, agricultural industries among others. These would enhance the development of cottage industries, promotes farming of shell animals, help to alleviate the unemployment crisis and creation of wealth from substances which would have been regarded as waste. Highlights Bivalve's exoskeletons from Anadara senilis, Crassostrea gasar, and Mytilus edulis are highly utilizable for a circular economy to reduce seafood waste. These shellfishes are high in minerals and chemical compounds and can be highly valorized in various industries.
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Papers by Toheeb Lekan Jolaosho
and those within the distance of 100 m being the most vulnerable groups.