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Kolawole, Ayotunde Samuel
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Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Environmental Science Immunology & microbiology Physics Veterinary

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Length- weight relationship, condition factor and sex ratio of Oreochromis niloticus and Chrysichthys nigrodigitatus in the lower section of Osun River, Nigeria Iyiola, Adams Ovie; Kolawole, Ayotunde Samuel; Umma, Samuel Bem; Iriobe, Tosin
Aceh Journal of Animal Science Vol 9, No 2 (2024): June 2024
Publisher : Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/ajas.9.2.31878

Abstract

Osun River is a major river in the Ogun-Osun River Basin and contributes significantly to fish production and quality source of protein. It is therefore essential to investigate the condition and characteristics of the most abundant fish species in the river. This aim was achieved by investigating the Morphometric parameters, sex ratio, and condition factor of Oreochromis niloticus and Chrysichthys nigrodigitatus in the lower section of the river; because these fish species were the most abundant and economically important. Monofilament gillnets were used for fish sampling for twelve months to cover both wet and dry seasons (November 2017 to October 2018). A total of 1597 individuals of both species were collected comprising 40.13% O. niloticus samples and 59.87% samples of C. nigrodigitatus. The correlation coefficient (r) for O. niloticus and C. nigrodigitatus were 0.78 and 0.89 which indicated a high and very high relationship respectively. O. niloticus showed a significant negative allometric growth pattern (b = 2.315) while C. nigrodigitatus showed a growth pattern that was significant and positively allometric (b = 3.102). The mean condition factor (K) was 2.8 for O. niloticus and 1.9 for C. nigrodigitatus. The sex ratio of male to female was 1.5:1 for O. niloticus and 1.2:1 for C. nigrodigitatus. It can be said that both fish species responded well in the river and it is therefore essential to maintain optimal environmental factors for the sustainability of these fish species in the river.
Growth performance, haematological and biochemical responses of Nile tilapia Oreochromis niloticus fed graded levels of groundnut cake Ayoola, Simeon Oluwatoyin; Kolawole, Ayotunde Samuel; Etim, Faith
Aceh Journal of Animal Science Vol 8, No 3 (2023): December 2023
Publisher : Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/ajas.8.3.29091

Abstract

The assessment of the effect of replacing fish meal with groundnut cake in the diet of Nile tilapiaOreochromis niloticuswas carried out in a twelve-week feeding trial. The objective of the study was to determine the appropriate level of groundnut cake inclusion in fish feed diet. Ten Nile tilapia fingerlings with mean weight of 7.550.50g were stocked in experimental tanks in triplicate. Varying levels of groundnut cake were incorporated in the experimental diets formulated; the control diet, Diet 0, 1, 2, 3, 4 and 5 having 0%, 20%, 40%, 60%, 80% and 100% inclusion level respectively. The experimental diet five exhibited the highest mean weight gain (8.001.68) and specific growth rate. But recorded the least significant feed conversion ratio (4.011.10). The diet also recorded the best protein efficiency ratio (1.370.30). There was significant difference observed in the growth performance, haematological values and biochemical values in fish fed with groundnut cake compared to the control diet. A reduction in the cholesterol (1.660.13) and Albumin (40.201.10) values were observed in fish fed groundnut cake based diet compared with the fish fed with the control diet having cholesterol and albumin values to be1.830.07 and40.601.60 respectively. It was observed that the use of groundnut cake in fish feed forO. niloticusenhances the growth of the fish. The 100% substitution shows highest weight gain, low FCR and low level of cholesterol.In conclusion, 80% partial replacement of fish meal in fish feed with groundnut cake should be encouraged.
Co-Authors Ayoola, Simeon Oluwatoyin Etim, Faith Iriobe, Tosin Iyiola, Adams Ovie Umma, Samuel Bem