JOURNAL OF ANIMAL SCIENCE AND VETERINARY MEDICINE
Integrity Research Journals
ISSN: 2536-7099
Model: Open Access/Peer Reviewed
DOI: 10.31248/JASVM
Start Year: 2016
Email: jasvm@integrityresjournals.org
Growth and some morphometric dynamism of Schilbe mystus (Linnaeus, 1758) in Asejire Reservoir, Oyo State, Nigeria
https://doi.org/10.31248/JASVM2022.333 | Article Number: 63E7CA652 | Vol.8 (1) - February 2023
Received Date: 10 August 2022 | Accepted Date: 29 August 2022 | Published Date: 28 February 2023
Author: Awopetu T. S.
Keywords: growth, Asymptotic, length, overexploitation, Schilbe mystus.
This study examined important population parameters for S. mystus in the Asejire reservoir, Nigeria, which included asymptotic length, growth coefficient, length at maturity, optimum length, growth performance, and mortality rate. This study was necessitated due to the decline in captured fisheries and the need to understand the population structure of the species. For eight months, 306 samples of Schilbe mystus were collected using gillnet from fishermen every two weeks (December–July 2019) and morphometric parameters were taken, after which the samples were preserved in the deep freezer for further analysis. The Von Bertalanffy growth function was used in estimating population parameters obtained from length-frequency data. The length at maturity (Lm) was 14.0 cm, the asymptotic length (L∞) was 23.2 cm, the growth coefficient (K) was 0.66/year, the reproductive load (Lm/L) was 0.6, and the optimal length (Lopt) was 14.1 cm. The total mortality (Z) was 2.22, the exploitation rate (E) was equal to 0.35, and the 1.44/year for natural mortality (M) and fishing mortality was 0.78/year. A slow rate of growth caused by unfavourable environmental conditions is indicated by the overall growth performance(Ø) of 2.6, which was in order to improve the conservation and sustainability of Schilbe mystus and was attributed to adverse environmental factors. The result shows the need to modify the mesh size used for fishing on the water body for optimum exploitation.
| Abdul, W. O., Omoniyi, I. T., Akegbejo-Samsons, Y., Akinyemi, A. A., Agbon, A. O., & Adeosun, F.I. (2012). Management indicators and growth performance index of Tilapia zillii in a Tropical Coastal Estuary. Journal of Agricultural Science, 4(11), 66-77. Crossref |
||||
| Adeosun. F. I. (2019). Gillnet selectivity and abundance of African Butter Catfish Schilbe mystus (Linnaeus, 1758) in Lower River Ogun, Nigeria. Egyptian Journal of Aquatic Biology and Fisheries, 23(3), 53-60. Crossref |
||||
| Alam, M. F., & Thomson, K. J. (2001). Current constraints and future possibilities for Bangladesh fisheries. Food Policy; 26, 297-313. Crossref |
||||
| Amponsah, S. K., Ofori-Danson, P. K., Nunoo, F. K., & GA, A. (2016). Virtual population analysis and estimates of maximum sustainable yield of some commercially important fish species in the coastal waters of Ghana and management implications. International Journal of Fisheries Aquatic Research, 2(3), 1-7. | ||||
| Ayoade, A. A. (2011). Population characteristics of Schilbe mystus (Linne, 1758), from two different habitats: Asejire and Oyan Lakes Southwestern Nigeria. Journal of Fisheries and Aquatic Science, 6(5), 571-577. Crossref |
||||
| Ayoade, A. A., & Ikulala, A. O. O. (2007). Length weight relationship, condition factor and stomach contents of Hemichromis bimaculatus, Sarotherodon melanotheron and Chromidotilapia guentheri (Perciformes: Cichlidae) in Eleiyele Lake, Southwestern Nigeria. Revista de Biologia Tropical, 55(3-4), 969-977. Crossref |
||||
| Ayo-Olalusi, C. I., & Ayoade, A. A. (2018). Population parameters of barracuda, Sphyraena afra (Family: Sphyraenidae) from coastal waters of Lagos State, Nigeria. Zoology and Ecology, 28(4), 376-383. Crossref |
||||
| Baset, A., Liu, Q., Liao, B., Waris, A., Ahmad, I., Yanan, H., & Qingqing, Z. (2020). Population dynamics of saddle grunt fish, Pomadasys maculatus (Bloch, 1793) from Pakistani Waters. Bioprocess Engineering, 4(1), 1-8. Crossref |
||||
| Beverton, R. J., & Holt, S. J. (2012). On the dynamics of exploited fish populations (Vol. 11). Springer Science & Business Media. | ||||
| Binohlan, C. (1998). The maturity table. FishBase, 98, 176-179. | ||||
| Bonfil, R. (2005). The purpose of stock assessment and the objectives of fisheries. In: Management Techniques for Elasmobranch Fisheries, Pp. 6-14. | ||||
| Cadrin, S. X., & Dickey-Collas, M. (2014). Stock assessment methods for sustainable fisheries. ICES Journal of Marine Science, 72(1), 1-6. Crossref |
||||
| Froese, R., & Binohlan, C. (2000). Empirical relationships to estimate asymptotic length, length at first maturity and length at maximum yield per recruit in fishes, with a simple method to evaluate length frequency data. Journal of fish biology, 56(4), 758-773. Crossref |
||||
| Idodo-Umeh, G. (2003). Freshwater fishes of Nigeria: Taxonomy, ecological notes, diet and utilization. Umeh Publishers, Nigeria. 232p. | ||||
| Jamu, D. M., & Ayinla, O. A. (2003). Potential for the development of aquaculture in Africa. NAGA, 26(3), 9-13. | ||||
| Kareem, K., Olanrewaju, N., & Igbaro, B. (2021). Growth pattern, diet and tropical niche breadth of the Nile Silver Catfish, Schilbe mystus (Linne 1758) in Asejire Lake, Southwestern, Nigeria. Egyptian Journal of Aquatic Biology and Fisheries, 25(2), 683-693. Crossref |
||||
| Kareem, O. K., Olanrewaju, A. N., Osho, E. F., Orisasana, O., Akintunde, M. A. (2016). Growth patterns and condition factor of Hepsetus odoe (Bloch, 1794) captured in Eleiyele Lake, Southwest Nigeria. Fisheries and Aquaculture Journal, 7(3), Article number 178. Crossref |
||||
| Kareem, O. K., Olanrewaju, A. N., & Alarape, A. A. (2019). Gut contents of Parachanna obscura Gunther 1861, in Eleyele Lake, Southwest Nigeria: A possible indicator of food and feeding habit. SAIRAP (South Asia Institute for Research and Publication) International Conference on Marine Science and Aquaculture (ICMSA - 19), Accra, Ghana. 18th - 19th July 2019. Pp 37-44. | ||||
| Karimzadeh, G. (2011). Study of natural and fishing mortality and exploitation rate of common Kilka Clupeonellacultriventris in southeast part of the Caspian Sea (Balbosa). AJAR, 6(3), 676-680. | ||||
| Maceina, M. J., & Sammons, S. M. (2006). An evaluation of different structures to age freshwater fish from a northeastern US river. Fisheries Management and Ecology, 13(4), 237-242. Crossref |
||||
| Mustafa, M. G., Ahmed, I., & Ilyas, M. (2019). Population dynamics of five important commercial fish species in the Sundarbans ecosystem of Bangladesh. Journal of Applied Life Sciences International, 22(2), 1-13. Crossref |
||||
| Oladimeji, Y. U. (2017). Trend in fish production parameters in Nigeria and its total estimated demand: Empirical evidence from fish production. Journal of Animal Production Research, 29(1), 410-418. | ||||
| Olagbemide, T. (2010). Length frequency distribution and length-weight relationship of Schilbe mystus from Lekki Lagoon in Lagos, Nigeria. Journal of agricultural and veterinary sciences, 2, 63-69. | ||||
| Olaosebikan, B. D., & Raji, A. (2013). Field guide to Nigerian freshwater fishes (revised Edition). National Institute of Freshwater Fisheries Research (NIFFR), New Bussa, Nigeria. | ||||
| Panahibazaz, M., Fatemi, S. M. R., Kaymaram, F., & Vosoghi, G. (2012). Growth parameter and mortality estimates of Yellowfin Seabream, Acanthopagrus latus (Houttuyn, 1782) in the coastal waters of Hormozgan Province, Iran. Journal of Oceanography, 3(10), 91-98. | ||||
| Pauly, D., & Munro, J. L. (1984). Once more on the comparison of growth in fish and invertebrates. Fishbyte, 2(1), 1-21. | ||||
| Roy, A., Dutta, S., Podder, A., & Homechaudhuri, S. (2020, March). Variation in population characteristics and harvesting pressure influencing recruitment pattern of an economically important fish, Osteomugil cunnesius of Indian Sundarbans. In: Proceedings of the Zoological Society (73(1), 5-15). Springer India. Crossref |
||||
| Sindt, A. R., Quist, M. C., & Pierce, C. L. (2012). Habitat associations of fish species of greatest conservation need at multiple spatial scales in wadeable Iowa streams. North American Journal of Fisheries Management, 32(6), 1046-1061. Crossref |
||||
| Thilsted, S. H. (2012). The potential of nutrient-rich small fish species in aquaculture to improve human nutrition and health. In: Subasinghe, R. P., Arthur, J. R., Bartley, D. M. De Silva, S. S., Halwart, M., Hishamunda, N., Mohan, C. V. & Sorgeloos, P. (eds.). Farming the waters for people and food. Proceedings of the Global Conference on Aquaculture 2010, Phuket, Thailand. 22-25 September 2010. pp. 57-73. FAO, Rome and NACA, Bangkok. | ||||
| Udoh, J. P., Ukpatu, J. E., & Udoidiong, O. M. (2015). Population dynamics of Chrysichthys nigrodigitatus (Lacépède, 1803) in the lower Cross River, Nigeria. Croatian Journal of Fisheries: Ribarstvo, 73(3), 103-114. Crossref |
||||
| Utete, B., & Fregene, B. T. (2020). Assessing the spatial and temporal variability and related environmental risks of toxic metals in Lake Asejire, south-western Nigeria. Scientific African, 7, e00259. Crossref |
||||
| Van der Bank, H. F., Greenfield, R., Daru, B. H., & Yessoufou, K. (2012). DNA barcoding reveals micro-evolutionary changes and river system-level phylogeographic resolution of African silver catfish, Schilbe intermedius (Actinopterygii: Siluriformes: Schilbeidae) from seven populations across different African river systems. Acta Ichthyologica et Piscatoria, 42(4), 308-321. Crossref |
||||
| FAO (2001). Yearbook of Fishery Statistics 1999. Capture production. FAO Statistics Series. Vol. 88/1. Rome: FAO, 776. | ||||
| Zhang, K., Cai, Y., Liao, B., Jiang, Y. E., Sun, M., Su, L., & Chen, Z. (2020). Population dynamics of threadfin porgy Evynnis cardinalis, an endangered species on the IUCN red list in the Beibu Gulf, South China Sea. Journal of Fish Biology, 97(2), 479-489. Crossref |
||||
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