Adesoji Akinwumi Adeyemi
@unilorin.edu.ng
Associate Professor
University of Ilorin
RESEARCH, TEACHING, or OTHER INTERESTS
Forestry, Global and Planetary Change, Ecological Modeling, Nature and Landscape Conservation
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Adesoji Akinwumi Adeyemi, , Moses Olayemi Ayinde, and
AVES Publishing Co.
Adenike Abiodun Adeyemi, Oyinofeoluwa Wuraola Ibrahim, Oluwabusayomi Omotoyosi Ajayi, and Samuel Tobi Ayeni
Universitat Politecnica de Valencia
<p>This study was carried out to assess the effect of dietary levels of zinc on semen indices, growth parameters and testicular sperm reserve of heterogeneous stock of male rabbits. Twenty male rabbits aged 6 mo old were randomly allotted to four groups of five males each and fed diets containing 0, 50, 100 and 150 mg of zinc gluconate per kg diet, respectively, for eight weeks. Semen was collected from the males weekly using an artificial vagina and semen volume (mL), spermatozoa motility (%), sperm concentration (×10<sup>8</sup>/mL) and live sperm cells (%) were assessed. Seminal plasma was separated from the semen by centrifugation, and its zinc concentration was determined using atomic absorption spectrometry. The weights of the males were taken weekly, and the daily feed intake was recorded. At the end of the feeding trial, the rabbits were stunned and slaughtered; the testes and epididymis were carefully removed and homogenised to determine sperm reserves using standard procedure. The result showed that semen indices were not significantly influenced by the dietary levels of zinc gluconate. Seminal zinc concentration was significantly higher in males fed 100 and 150 mg of zinc per kg compared to those in the control group. A higher body weight gain (454±50.3 g), testes weight (6.23±0.25 g) and epididymis weight (1.63±0.59 g) was recorded in males fed diet supplemented with 50 mg of Zinc gluconate per kg. No significant effect of dietary zinc supplementation was recorded in testicular sperm reserve. Epididymal sperm reserve was significantly higher in males fed the diets including 100 and 150 mg of zinc gluconate per kg. In conclusion, dietary levels of zinc gluconate did not improve semen quality and growth indices but increased seminal zinc concentration, which could result in improved prostate health in the heterogeneous stock of male rabbits in the tropics.</p>
Adesoji Akinwumi Adeyemi, , Taofiq Maijindadi Ibrahim, and
AVES Publishing Co.
A. A. Adeyemi, O. T. Bakare, A. J. Akindele, and O. Soyode
Emerald Publishing Limited
Public concern for the natural environment has been one of the vital issues of discussion in recent decades across the globe. Individuals are now stressing the importance of the natural environment. In the context of developing countries, nongovernmental organisations (NGOs) are well positioned to have powerful impact on the discharge of corporate social responsibility through the usual pressures and lobbies exerted by the NGOs and their various networks than any other stakeholder. This study examines the impact of NGOs on environmental reporting of quoted manufacturing companies listed on Nigerian Stock Exchange. Using simple random sampling technique, secondary data were collected from annual reports and accounts of 10 selected manufacturing companies spanning 2010–2019. Multiple regression technique was used to analyse data collected. The findings reveal that environmental reporting and corporate social responsibility costs do not have significant impact on ROA and NPM with p-value of 0.713 and 0.612 at 5% level of significance, respectively, but both variables have positive significant effect on ROA. This means that the fund committed to environmental cost by these selected firms does not reflect on their profitability for the period reviewed. Based on this, it was recommended that as a matter of urgency for international Environmental NGOs should collaborate with local ones in achieving environmental friendly society. Similarly, United Nations should channel more funding on environment-focused NGOs because environmental issue is one of the cardinal points to be achieved by Sustainable Development Goals.
Adesoji A. Adeyemi
Informa UK Limited
ABSTRACT The suitability of site form (SF) methods for evaluating site quality was investigated. Systematic sampling techniques were used for plot location in four sites (Aking, Ekang, Erokut, and Ekuri) within the Oban Forest of Nigeria. Four 2-km-long transects/sites were sampled, totaling 16 transects. Five 0.25-ha plots were alternately laid along each transect, making 80 plots. All trees with diameter at breast height (DBH) ≥ 10 cm were measured for height and diameter at the merchantable limit, middle, and base. Soil samples were collected at 0–15 and 15–30 cm depths in each plot, then analyzed using standard laboratory procedures. Site forms were computed using an index diameter of 25 cm. Data were analyzed using descriptive statistics, correlation analyses, and regression models. Ekuri had the highest stand density (173.0 ± 51.0 stems/ha), Erokut had the lowest (143.0 ± 39.0 stems/ha). Ekang had the highest stem volume (3,847.14 ± 2.16 m3/ha), while Erokut had the lowest (2,127.71 ± 1,382 m3/ha). The most productive site was Ekang (SF = 26.52 m), while Erokut was the least productive site (SF = 21.70 m). Stem volume (SV) has significantly positive correlations with soil organic matter, calcium, and silt. The best height-diameter model was logarithmic (R2 = .51; RMSE = 4.462). The most suitable SV model was polynomial (R2 = .85; RMSE = 2.207).
Saka O. Jimoh, Emmanuel T. Ikyaagba, Abideen A. Alarape, Adesoji A. Adeyemi, and Matthias Waltert
Wiley
Across West and Central Africa, duikers are important for trade and consumption; their populations are expected to become depleted. Reliable data on their status are scanty in Nigeria. We assessed duiker populations in the Oban Sector of Cross River National Park through diurnal and nocturnal surveys along 32 transects of 2 km each. After 508-km survey effort, only Ogilby's duiker (Cephalophus ogilbyi) and blue duiker (Philantomba monticola) were recorded. Using habitat as a covariate in modelling detection probability in DISTANCE 6.0, we estimated densities for the blue duiker ranging from 15.5 (95% CI: 7.8–30.9) in the core, 5.8 (CI: 2.6–12.9) in the buffer and 0.9 (CI: 0.09–10.1) km² in farm fallow to no duikers in the plantation. For Ogilby's duiker, densities ranged from 1.6 (95% CI: 0.7–3.7) km² in the core, 2.0 (CI: 0.8–5.1) in buffer to no duikers in farm fallow and plantation. The apparent absence of yellow-backed and Bay duikers may indicate local depletion. We call on all stakeholders to rise up to the challenge of rescuing this biological hotspot in Nigeria from further degradation and species loss through improved funding for well-equipped field staff and institutionalized community wildlife management.
Resume
Dans toute l'Afrique de l'Ouest et l'Afrique centrale, les cephalophes sont importants pour le commerce et la consommation, et l'on s'attend a ce que leurs populations s'effondrent. Les informations fiables sur leur statut sont tres rudimentaires au Nigeria. Nous avons evalue les populations de cephalophes dans le secteur d'Oban du Cross River national Park lors d'etudes diurnes et nocturnes le long de 32 transects de 2 km chacun. Apres une etude portant sur 508 km, seuls le cephalophe d'Ogilby (Cephalophus ogilbyi) et le cephalophe bleu (Philantomba monticola) furent releves. En utilisant l'habitat comme covariante en modelisant la probabilite de detection avec DISTANCE 6.0, nous avons estime pour le cephalophe bleu des densites allant de 15.5 (95% d'intervalle de confiance, IC: 7.8–30.9) au centre, et de 5.8 (IC: 2.6–12.9) dans la zone tampon, a 0.9 (IC: 0.09–10.1) km−2 dans les zones agricoles en jacheres et aucun cephalophe dans la plantation. Pour le cephalophe d'Ogilby, les densites allaient de 1.6 (95% IC: 0.7–3.7) km−2 au centre, a 2.0 (IC: 0.8–5.1) dans la zone tampon et aucun dans les jacheres et la plantation. L'absence apparente de cephalophes a dos jaune et a bande dorsale noire pourrait indiquer un epuisement local. Nous en appelons a toutes les parties prenantes pour qu'elles relevent le defi et sauvent ce haut-lieu biologique nigerian de toute nouvelle degradation et de toute nouvelle perte d'especes grâce a un meilleur financement d'un personnel de terrain bien equipe et a l'institutionnalisation de la gestion communautaire de la faune.