Authors:Özgür Cengiz Pages: 113 - 126 Abstract: This study was carried out to reveal the age and growth of the atlantic chub mackerel (Scomber colias Gmelin, 1789) in Gallipoli Peninsula (northern Aegean Sea, Turkey). The individuals of sampled S. colias from commercial fishmongers randomly each month were taken during the period January 2016-December 2016. A total of 348 otoliths were aged successfully. The total length and weight of aged specimens ranged from 16.0 to 28.0 cm and from 31.72 to 222.68 g, with a mean of 22.0 cm and 101.23 g, respectively. The length-weight relationship was estimated as W = 0.0060TL3.20 (R2 = 0.97). The von Bertalanffy growth equations were computed to be ð¿∞ = 32.0 cm, k = 0.30 year-1, ð‘¡0 = -1.72 year for all samples. The growth performance index (ð›·′) was found as 2.49. The present study provides the first information on the growth parameters of the species so as to define the current state Scomber colias population for Gallipoli Peninsula (northern Aegean Sea, Turkey). PubDate: 2022-12-26 DOI: 10.4314/mejs.v14i2.1 Issue No:Vol. 14, No. 2 (2022)
Authors:Ayeloja A. A, Jimoh W. A, Adebisi G. L, Amusat M. A Pages: 127 - 138 Abstract: Gender differentia among fish farmers within the Ilorin metropolis, Kwara State, Nigeria was studied with the aim of evaluating the level of involvement of the different gender in fish production activities, accessing their access to credit, and the constraints faced by them. A multistage sampling technique using a structured questionnaire was adopted for this study, the sample size was 210 using a structured questionnaire. Data were analyzed using SPSS 16.0. 61.90% of respondents were male while 52.5% and 49.2% of female and male respondents respectively were in their active age group of < 30 years. Females were more involved in fish marketing (42.90%) and fish processing (48.75%). There exist a significant association (p<0.05) between gender and level of involvement in fish marketing (χ2=9.20, p<0.05), access to land (χ2=10.69, p<0.05), and fish production activities (χ2=11.83, p<0.05). Access to credit was poor. Constraints faced include poor access to credit facilities, inadequate information, high cost of feed production, and poor water quality. It is therefore recommended that access to credit facilities banks of agriculture, microfinance banks, and commercial banks should be improved on while fish farmers are also encouraged to form cooperative societies as it will improve the capacity building of farmers and ease their credit acquisition for farming activities. PubDate: 2022-12-26 DOI: 10.4314/mejs.v14i2.2 Issue No:Vol. 14, No. 2 (2022)
Authors:Özgür Cengiz Pages: 139 - 148 Abstract: Fishing activities have always been a dangerous profession and numerous factors have a direct or indirect impact on the health, safety, and working conditions of fishermen. The present study aims in order to reveal the risk factors affecting the occupational health and safety of small-scale fishermen in Lake Erçek (Van, Turkey). Data were obtained from fishermen by survey between March 2022 and May 2022 and evaluated using the” L type matrix” method. “Having no training in occupational health and safety (OHS)” and “Fatigue from irregular and long working hours” are the important risk factors that affect the working conditions of fishermen. This study will make a significant contribution to the work efficiency of the fishermen and the planning to be made in the following processes, by making a risk analysis in terms of occupational health and safety before the possible increase in the number of fishermen in Lake Erçek (Van, Turkey). PubDate: 2022-12-26 DOI: 10.4314/mejs.v14i2.3 Issue No:Vol. 14, No. 2 (2022)
Authors:Lawal O. W, Erinle-Ibrahim L. M , Okunoye O. S Pages: 149 - 162 Abstract: The main purpose of this study is to compare a semi-analytical method and numerical method namely the homotopy perturbation method (HPM) and finite difference method (FDM) respectively. These methods were employed for solving the nonlinear problem of the magnetohydrodynamic (MHD) couette flow of third-grade fluid between the two parallel plates. The comparison was made between a solution of HPM and FDM against a solution obtained from regular perturbation and the results are tabulated. From a computational viewpoint, it is revealed that the HPM is more reliable and efficient than FDM. Also, the results show that the FDM requires slightly more computational effort than the HPM, although the HPM yields more accurate results than the FDM. PubDate: 2022-12-26 DOI: 10.4314/mejs.v14i2.4 Issue No:Vol. 14, No. 2 (2022)
Authors:Patrick Akwasi Anamuah Mensah, William Obeng-Denteh, Kwasi Baah Gyamfi Pages: 163 - 177 Abstract: In topological dynamical systems (TDS), recurrence (periodic–like recurrence) is one of the important concepts in its studies but one major problem is the inability to demonstrate and/or illustrate its formation in the orbit structure of system from a topological point of view. In this paper, the logistic function was applied to demonstrate the periodic point as a recurrent formation (periodic–like recurrence) in the topological dynamical system and dynamical system. The Wolfram Alpha computational knowledge engine was used in obtaining the tables and the figures for the study through various examples of the logistic function. The study shows that period – 2 recurrence is formed when the trajectory of the function is made up of two different values that keep repeating after successive iterations as a result of the period – 2 orbits when the parameter of the function is between 3 and 3.45. The study again shows that when the parameter of the function is greater than 3.83 there is a period – 3 point hence the formation of other periodic points. Convincingly, beyond this period – 3 is another subsequent period called the period-doubling cascade leading into chaos. This period-doubling asserts that other periodic–like recurrences are also present, hence period –n recurrent exists. PubDate: 2022-12-26 DOI: 10.4314/mejs.v14i2.5 Issue No:Vol. 14, No. 2 (2022)
Authors:Osanyinpeju Kifilideen L Pages: 178 - 196 Abstract: The four-figure of power of base numbers of tables needs to be created for easy synchronization with the existing Logarithm table of power of base 10 which is working on four figures. Although the five-figure of power base numbers of tables are more accurate because it is having less approximation in its establishment. The four-figure table is easy to compute doing utilization because it is having less digits to work with. This paper presents the four and five figures of Kifilideen (Power of base 11) and AntiKifilideen (Antipower of base 11) tables for the computation of mathematical problems. The four and five figures are both reliable to work with. However, there is a tradeoff between easy computation as related to the four-figure table and more accuracy as related to the five-figure table in their utilization. PubDate: 2022-12-26 DOI: 10.4314/mejs.v14i2.6 Issue No:Vol. 14, No. 2 (2022)
Open Access journal
