Ghana Journal of Science, Technology and Development https://gjstd.org/index.php/GJSTD Ghana Journal of Science, Technology and Development (GJSTD) is an online double blind peer review journal which publishes scholarly articles in all disciplines of science, technology and development and will normally be published every quarter of the year en-US <p style="text-align: justify;">As a publisher of the journal, we reserve full copyright ownership of the journal and all submissions published in it.</p> tansah@uds.edu.gh (Editor in Chief) smintah@uds.edu.gh (Mr. Stephen Mintah) Sat, 08 Aug 2020 08:07:40 +0000 OJS 3.1.1.4 http://blogs.law.harvard.edu/tech/rss 60 Effects of fixation and freezing on some morphometric characteristics of Nile tilapia https://gjstd.org/index.php/GJSTD/article/view/225 <p><em>Fish preservation methods including use of formalin and freezing are widely used to preserve fish specimen in the laboratory to maintain their freshness for future laboratory analysis. This present study aimed to investigate the effects of fixation and freezing on the morphometric characteristics of Nile tilapia, Oreochromis niloticus. Forty (40) samples of a single cohort of O. niloticus were obtained from the Tono reservoir in Navrongo, Ghana. Total length (TL) and body weight (W) of each fish were measured. </em><em>Twenty (20) samples of O. niloticus were subjected to freezing at -4ºC whilst the remaining twenty (20) were fixed in 4% formaldehyde solution. The study lasted for thirteen (13) days during which the length and weight were determined repeatedly in a sequence during the storage period</em><em>. Although there was no significant difference (p &gt; 0.05) in the change of length and weight measured during the study, all samples showed some degree of shrinkage within the storage period. For samples preserved by freezing, there was a 5.62 % and 19.61 % reduction in length and weight respectively, while those preserved in formalin reduced by 5.24% and 10.72% in length and weight respectively. For condition factor (k), there was no change at the end of the experiment for samples preserved by freezing but a marginal increase of 0.08% was realized for those preserved in formalin. Though shrinkage occurred in both samples preserved in formalin and freezing, the greatest shrinkage was recorded by those preserved by freezing.</em></p> Emmanuel O. KOMBAT, Elliot H. ALHASSAN, Daniel N. AKONGYUURE ##submission.copyrightStatement## http://creativecommons.org/licenses/by-nc-sa/4.0 https://gjstd.org/index.php/GJSTD/article/view/225 Sat, 08 Aug 2020 08:02:10 +0000 Abattoir-based prevalence and distribution of porcine cysticercosis in northern Ghana inferred from Kumasi Abattoir https://gjstd.org/index.php/GJSTD/article/view/224 <p><em>Taenia solium </em><em>cysticercosis </em><em>is a cosmopolitan foodborne disease that is neglected in many</em> <em>endemic tropical societies. The disease situation is less understood in parts of sub-Saharan Africa including Ghana, meanwhile useful surveillance data are needed from all endemic localities for designing effective intervention strategies. The present study estimated abattoir-based prevalence and distribution of T. solium cysticercosis in pigs from northern Ghana. A survey was carried out at the Kumasi abattoir to screen for cyst infection and localization sites, and evaluate the handling of infected carcasses. Taenia solium cysticercosis infection was noted in pigs at the abattoir, drawn from all five Regions of northern Ghana. Generally, porcine cysticercosis had 9.73% prevalence across the Regions with the Upper East Region (10.10%) being noted as a key focus of the cestode. Animals from the Upper West, Savannah, Northern and North East Regions also recorded a prevalence range of 8.25 – 12.12%. The results indicate considerable prevalence of T. solium cysticercosis that was in wide distribution in pig in northern Ghana and point to a public health threat in cities where such infected pigs are slaughtered.</em></p> Francis ADDY, Edward MASEKO, Osman DUFAILU ##submission.copyrightStatement## http://creativecommons.org/licenses/by-nc-sa/4.0 https://gjstd.org/index.php/GJSTD/article/view/224 Sat, 08 Aug 2020 08:00:58 +0000 Modeling soil water balance of an agricultural watershed in the Guinea Savannah Agro-ecological Zone; a case of the Tono irrigation dam watershed https://gjstd.org/index.php/GJSTD/article/view/223 <p>Water is the most significant of all the requirements for plant growth and development. Its availability or scarcity in the soil can denote a successful harvest, reduction in yield, or complete failure. Though Tono is a small community in the Kassena Nankana East Municipality in Upper East Region of Ghana, farmers in the area contribute significantly to the availability of food products in neighboring communities, and even in some parts of southern Ghana. However, changing climate and landscape dynamics are perceived to be the primary cause of decreasing water availability and responsible for the dwindling farming fortunes. The study therefore investigated the changes to soil water balance occurring within the Tono dam watershed, as well as changes to the landuse/landcover (LULC) of the area and its impacts on crop production using the Soil and Water Assessment Tool (SWAT). The LULC continues to change through anthropogenic activities thereby causing variations in the hydrological cycle over time. A 30-year period from 1984 to 2014 was used as the simulation period to run the model. Two (2) LULC maps and change scenarios for 1984 through to 2014 were assessed. The results revealed a relationship between landcover and the response to hydrology, in that, a decrease in landcover causes a decrease in surface water, soil moisture, and a corresponding infinitesimal decrease in evapotranspiration. The results showed a 17.6%, 9.6%, and 1.6% decrease in rainfall, soil moisture and evapotranspiration, respectively. The results showed the ability of the SWAT model to reveal spatio-temporal variation of the change in the landscape and the associated changes arising from climate change having significant effects on the Tono catchment.</p> Steve AMPOFO, Boateng AMPADU, Nangue Biyogue DOUTI, Michael Mba KUSIBU ##submission.copyrightStatement## http://creativecommons.org/licenses/by-nc-sa/4.0 https://gjstd.org/index.php/GJSTD/article/view/223 Sat, 08 Aug 2020 08:00:01 +0000