Comparative Growth Dynamics and Exploitation of <i>Lates niloticus</i> (Linnaeus, 1758) and <i>Oreochromis niloticus</i> (Linnaeus, 1758) in the Nangbeto Dam Lake in Togo

Gnimassoun Gbêssi Jean Baptiste; Serigne Modou Sarr; Assou Delagnon; Segniagbeto Hoinsoude Gabriel

doi:doi:10.11648/j.ijaas.20220804.17

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Comparative Growth Dynamics and Exploitation of Lates niloticus (Linnaeus, 1758) and Oreochromis niloticus (Linnaeus, 1758) in the Nangbeto Dam Lake in Togo

Gnimassoun Gbêssi Jean Baptiste, Serigne Modou Sarr, Assou Delagnon, Segniagbeto Hoinsoude Gabriel

Published in International Journal of Applied Agricultural Sciences (Volume 8, Issue 4)

Received: 28 July 2022 Accepted: 18 August 2022 Published: 31 August 2022

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Abstract

The main objective of this study is to characterize the stock status of two of the most abundant fish species in the commercial catch, Lates niloticus (Linnaeus, 1758) and Oreochromis niloticus (Linnaeus, 1758) in order to propose a sustainable management measures for a resilient exploitation of both species. A total of 214 individuals of L. niloticus and 1088 individuals of O. niloticus were measured from July 2018 to November 2018. The total lengths ranged from 9.5 cm to 79.5 cm for L. niloticus and 8 cm to 34 cm for O. niloticus. The weights ranged from 13 g to 6300 g for L. niloticus and from 11 g to 635 g for O. niloticus. The study of the growth dynamics from the frequencies of grouped lengths was done by using the FISAT II software version 1.2.2. The asymptotic lengths found are 83.48 cm and 35.7 cm respectively for L. niloticus and O. niloticus while their respective growth coefficients are 0.03 year^-1 and 0.07 year^-1. The growth performance indices obtained are Φ' = 2.32 for L. niloticus and Φ' = 1.95 for O. niloticus. Total, natural and fishing mortality rates were Z = 0.33 yr^-1, M=0.13yr^-1, F = 0.20 yr^-1 for L. Niloticus and Z = 0.84 yr^-1, M = 0.29yr^-1, F = 0.55 yr^-1 for O. niloticus. The species at Nangbeto dam lake live in poor habitat conditions with fairly low condition factors 1.88 for L. niloticus and 1.99 for O. niloticus. They both show minority allometry. The weight-length relationship parameters are respectively a = 0.061 and b = 2.54 (r² = 0.92) and a = 0.067 and b = 2.58 (r² = 0.96) for L. niloticus and O. niloticus. Both species are over-exploited (E = 0.60 for L. niloticus E = 0.65 for O. niloticus). Overall, given that Nangbeto dam lake has an important place in the supply of protein of halieutic origin to the riparian communities and to the Togolese population, our study revealed that both L. niloticus and O. niloticus are overexploited. The species fishing related mortality rates are far greater than their natural mortality rates. Their total mortality rates are higher than their growth rates. The stocks of both species are undergoing a depletion. An extension of the biological resting period and the regulation of the fishing mesh sizes could be implemented as sustainable management measures for the renewal of fish stocks in the Nangbeto dam lake.

Published in	International Journal of Applied Agricultural Sciences (Volume 8, Issue 4)
DOI	10.11648/j.ijaas.20220804.17
Page(s)	185-191
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Growth Dynamics, Lates niloticus, Oreochromis niloticus, Weight-Length, Nangbeto Dam Lake

References

[1]	Ahouansou-Montcho, S., Agadjihouèdé, H., Montchowui, E., Lalèyè, P. A. & Moreau, J. (2015). Population parameters of Oreochromisniloticus (Cichlidae) recently introduced in lake Toho (Benin, West Africa). International Journal of Fisheries and Aquatic Studies; 2 (3): 141-145. Bos, F., & Ruijs, A. (2021). Quantifying the Non-Use Value of Biodiversity in Cost–Benefit Analysis: The Dutch Biodiversity Points. Journal Of Benefit-Cost Analysis, 12 (2), 287-312. doi: 10.1017/bca.2020.27.
[2]	Barry, J. P. & Tegner, M. J. (1990). Inferring demographic processes from size-frequency distributions: simple models indicate specific patterns of growth and mortality. Fishery Bulletin 88, 13-19.
[3]	Blivi, A. B. (2000). Effet du barrage de Nangbéto sur l’évolution du trait de côte: une analyse prévisionnelle sédimentologique [Effect of the Nangbeto dam on the evolution of the coast line: a predictive sedimentological analysis]. J. Rech. Sci. Univ. Bénin (Togo), 4 (1); 29-41.
[4]	Daget, J. & Leguen, J-C. (1975). Dynamique des populations exploitées de poisons in Problèmes d’écologie: la démographie des populations de vertebras [Dynamics of exploited populations of fishes in Problems of ecology: the demography of vertebras populations]. Lamotte et Bourlière, 443p, Masson, Paris pp. 395-443.
[5]	Dewa-Kassa, K. A., Nenonene, A. Y., Tchaniley, L. & Koba, K. (2018). Pratiques de la production et d’exploitation des fourrages dans la Région des Plateaux au Togo [Fodder production and exploitation practices in the Plateaux Region of Togo]. Int. J. Biol. Chem. Sci. 12 (3): 1415-1422.
[6]	FAO. (2016). La situation mondiale des pêches et de l’aquaculture [Fodder production and exploitation practices in the Plateaux Region of Togo]. 227p.
[7]	Gulland, J. A. (1969). Manual of methods for fish stock assessement. Part I. fish population analysis. VII, 154p.
[8]	Kokou, K., Afidégnon, D., Guelly K. A., Roussel, B. & Akpagana, K. (1999). Dynamique de la végétation périphérique du barrage hydro-électrique de Nangbéto sur le fleuve Mono (Togo) après la mise en eau [Dynamics of the peripheral vegetation of the Nangbeto hydroelectric dam on the Mono River (Togo) after impoundment]. Espace, Culture et Développement dans la region d’Atakpamé. pp. 103-112.
[9]	Le Cren, E. D. (1951). The length-weight relationship and seasonal cycle in gonad weight and condition in the perch (Percafluviatilis). The Journal of Animal Ecology, 201–219.
[10]	Lederoun, D., Laleye, P., Vreven, E., & Vandewalle, P. (2016). Length-weight and length-length relationships and condition factors of 30 actinopterygian fish from the Mono basin (Benin and Togo, West Africa). Cybium, 40 (4), 267–274.
[11]	MAEP. (2013). Plan de gestion des pêcheries du barrage de Nangbéto [Management plan for the fisheries of the Nangbeto dam]. DPA. 28p.
[12]	Pauly, D. (1982). Une sélection de méthodes simples pour l’estimation des stocks de poissons tropicaux [A selection of simple methods for the estimation of tropical fish stocks]. FAO, Roma, 2–24.
[13]	Sarr, S. M. (2013). Age et croissance, paramètres d’exploitation et régime alimentaire du mulet jaune, Mugil cephalus (Linneaus, 1758, Mugilidae) dans l’estuaire du Fleuve Sénégal [Age and growth, exploitation parameters and diet of the yellow mullet, Mugil cephalus (Linneaus, 1758, Mugilidae) in the Senegal River estuary] (PhD Thesis). Thèse de doctorat unique, Université Polytechnique de Bobo-Dioulasso, 183p.
[14]	UEMOA. (2012). Enquête-cadre sur la pêche continentale au Togo [Framework survey on inland fishing in Togo]. Rapport. 98p.
[15]	Yongo, E., Agembe, S., Outa, N. & Owili M. (2018). Growth, mortality and recruitment of Nile perch (Latesniloticus) in Lake Victoria, Kenya. Lakes & Reserv. 2018; 23: 17–23. https://doi.org/10.1111/lre.12203

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Gnimassoun Gbêssi Jean Baptiste, Serigne Modou Sarr, Assou Delagnon, Segniagbeto Hoinsoude Gabriel. (2022). Comparative Growth Dynamics and Exploitation of Lates niloticus (Linnaeus, 1758) and Oreochromis niloticus (Linnaeus, 1758) in the Nangbeto Dam Lake in Togo. International Journal of Applied Agricultural Sciences, 8(4), 185-191. https://doi.org/10.11648/j.ijaas.20220804.17

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ACS Style

Gnimassoun Gbêssi Jean Baptiste; Serigne Modou Sarr; Assou Delagnon; Segniagbeto Hoinsoude Gabriel. Comparative Growth Dynamics and Exploitation of Lates niloticus (Linnaeus, 1758) and Oreochromis niloticus (Linnaeus, 1758) in the Nangbeto Dam Lake in Togo. Int. J. Appl. Agric. Sci. 2022, 8(4), 185-191. doi: 10.11648/j.ijaas.20220804.17

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Gnimassoun Gbêssi Jean Baptiste, Serigne Modou Sarr, Assou Delagnon, Segniagbeto Hoinsoude Gabriel. Comparative Growth Dynamics and Exploitation of Lates niloticus (Linnaeus, 1758) and Oreochromis niloticus (Linnaeus, 1758) in the Nangbeto Dam Lake in Togo. Int J Appl Agric Sci. 2022;8(4):185-191. doi: 10.11648/j.ijaas.20220804.17

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@article{10.11648/j.ijaas.20220804.17,
  author = {Gnimassoun Gbêssi Jean Baptiste and Serigne Modou Sarr and Assou Delagnon and Segniagbeto Hoinsoude Gabriel},
  title = {Comparative Growth Dynamics and Exploitation of Lates niloticus (Linnaeus, 1758) and Oreochromis niloticus (Linnaeus, 1758) in the Nangbeto Dam Lake in Togo},
  journal = {International Journal of Applied Agricultural Sciences},
  volume = {8},
  number = {4},
  pages = {185-191},
  doi = {10.11648/j.ijaas.20220804.17},
  url = {https://doi.org/10.11648/j.ijaas.20220804.17},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijaas.20220804.17},
  abstract = {The main objective of this study is to characterize the stock status of two of the most abundant fish species in the commercial catch, Lates niloticus (Linnaeus, 1758) and Oreochromis niloticus (Linnaeus, 1758) in order to propose a sustainable management measures for a resilient exploitation of both species. A total of 214 individuals of L. niloticus and 1088 individuals of O. niloticus were measured from July 2018 to November 2018. The total lengths ranged from 9.5 cm to 79.5 cm for L. niloticus and 8 cm to 34 cm for O. niloticus. The weights ranged from 13 g to 6300 g for L. niloticus and from 11 g to 635 g for O. niloticus. The study of the growth dynamics from the frequencies of grouped lengths was done by using the FISAT II software version 1.2.2. The asymptotic lengths found are 83.48 cm and 35.7 cm respectively for L. niloticus and O. niloticus while their respective growth coefficients are 0.03 year-1 and 0.07 year-1. The growth performance indices obtained are Φ' = 2.32 for L. niloticus and Φ' = 1.95 for O. niloticus. Total, natural and fishing mortality rates were Z = 0.33 yr-1, M=0.13yr-1, F = 0.20 yr-1 for L. Niloticus and Z = 0.84 yr-1, M = 0.29yr-1, F = 0.55 yr-1 for O. niloticus. The species at Nangbeto dam lake live in poor habitat conditions with fairly low condition factors 1.88 for L. niloticus and 1.99 for O. niloticus. They both show minority allometry. The weight-length relationship parameters are respectively a = 0.061 and b = 2.54 (r2 = 0.92) and a = 0.067 and b = 2.58 (r2 = 0.96) for L. niloticus and O. niloticus. Both species are over-exploited (E = 0.60 for L. niloticus E = 0.65 for O. niloticus). Overall, given that Nangbeto dam lake has an important place in the supply of protein of halieutic origin to the riparian communities and to the Togolese population, our study revealed that both L. niloticus and O. niloticus are overexploited. The species fishing related mortality rates are far greater than their natural mortality rates. Their total mortality rates are higher than their growth rates. The stocks of both species are undergoing a depletion. An extension of the biological resting period and the regulation of the fishing mesh sizes could be implemented as sustainable management measures for the renewal of fish stocks in the Nangbeto dam lake.},
 year = {2022}
}

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TY - JOUR
T1 - Comparative Growth Dynamics and Exploitation of Lates niloticus (Linnaeus, 1758) and Oreochromis niloticus (Linnaeus, 1758) in the Nangbeto Dam Lake in Togo
AU - Gnimassoun Gbêssi Jean Baptiste
AU - Serigne Modou Sarr
AU - Assou Delagnon
AU - Segniagbeto Hoinsoude Gabriel
Y1 - 2022/08/31
PY - 2022
N1 - https://doi.org/10.11648/j.ijaas.20220804.17
DO - 10.11648/j.ijaas.20220804.17
T2 - International Journal of Applied Agricultural Sciences
JF - International Journal of Applied Agricultural Sciences
JO - International Journal of Applied Agricultural Sciences
SP - 185
EP - 191
PB - Science Publishing Group
SN - 2469-7885
UR - https://doi.org/10.11648/j.ijaas.20220804.17
AB - The main objective of this study is to characterize the stock status of two of the most abundant fish species in the commercial catch, Lates niloticus (Linnaeus, 1758) and Oreochromis niloticus (Linnaeus, 1758) in order to propose a sustainable management measures for a resilient exploitation of both species. A total of 214 individuals of L. niloticus and 1088 individuals of O. niloticus were measured from July 2018 to November 2018. The total lengths ranged from 9.5 cm to 79.5 cm for L. niloticus and 8 cm to 34 cm for O. niloticus. The weights ranged from 13 g to 6300 g for L. niloticus and from 11 g to 635 g for O. niloticus. The study of the growth dynamics from the frequencies of grouped lengths was done by using the FISAT II software version 1.2.2. The asymptotic lengths found are 83.48 cm and 35.7 cm respectively for L. niloticus and O. niloticus while their respective growth coefficients are 0.03 year-1 and 0.07 year-1. The growth performance indices obtained are Φ' = 2.32 for L. niloticus and Φ' = 1.95 for O. niloticus. Total, natural and fishing mortality rates were Z = 0.33 yr-1, M=0.13yr-1, F = 0.20 yr-1 for L. Niloticus and Z = 0.84 yr-1, M = 0.29yr-1, F = 0.55 yr-1 for O. niloticus. The species at Nangbeto dam lake live in poor habitat conditions with fairly low condition factors 1.88 for L. niloticus and 1.99 for O. niloticus. They both show minority allometry. The weight-length relationship parameters are respectively a = 0.061 and b = 2.54 (r2 = 0.92) and a = 0.067 and b = 2.58 (r2 = 0.96) for L. niloticus and O. niloticus. Both species are over-exploited (E = 0.60 for L. niloticus E = 0.65 for O. niloticus). Overall, given that Nangbeto dam lake has an important place in the supply of protein of halieutic origin to the riparian communities and to the Togolese population, our study revealed that both L. niloticus and O. niloticus are overexploited. The species fishing related mortality rates are far greater than their natural mortality rates. Their total mortality rates are higher than their growth rates. The stocks of both species are undergoing a depletion. An extension of the biological resting period and the regulation of the fishing mesh sizes could be implemented as sustainable management measures for the renewal of fish stocks in the Nangbeto dam lake.
VL - 8
IS - 4
ER -

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Author Information

Gnimassoun Gbêssi Jean Baptiste

Department of Zoology, Laboratory of Ecology and Ecotoxicology, Faculty of Sciences, University of Lomé, Lomé, Togo
Serigne Modou Sarr

Department of Forest Production, Higher Institute of Agricultural and Rural Training, Alioune Diop University of Bambey, Bambey, Senegal
Assou Delagnon

Department of Zoology, Laboratory of Ecology and Ecotoxicology, Faculty of Sciences, University of Lomé, Lomé, Togo
Segniagbeto Hoinsoude Gabriel

Department of Zoology, Laboratory of Ecology and Ecotoxicology, Faculty of Sciences, University of Lomé, Lomé, Togo

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APA Style

Gnimassoun Gbêssi Jean Baptiste, Serigne Modou Sarr, Assou Delagnon, Segniagbeto Hoinsoude Gabriel. (2022). Comparative Growth Dynamics and Exploitation of Lates niloticus (Linnaeus, 1758) and Oreochromis niloticus (Linnaeus, 1758) in the Nangbeto Dam Lake in Togo. International Journal of Applied Agricultural Sciences, 8(4), 185-191. https://doi.org/10.11648/j.ijaas.20220804.17

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Gnimassoun Gbêssi Jean Baptiste; Serigne Modou Sarr; Assou Delagnon; Segniagbeto Hoinsoude Gabriel. Comparative Growth Dynamics and Exploitation of Lates niloticus (Linnaeus, 1758) and Oreochromis niloticus (Linnaeus, 1758) in the Nangbeto Dam Lake in Togo. Int. J. Appl. Agric. Sci. 2022, 8(4), 185-191. doi: 10.11648/j.ijaas.20220804.17

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Gnimassoun Gbêssi Jean Baptiste, Serigne Modou Sarr, Assou Delagnon, Segniagbeto Hoinsoude Gabriel. Comparative Growth Dynamics and Exploitation of Lates niloticus (Linnaeus, 1758) and Oreochromis niloticus (Linnaeus, 1758) in the Nangbeto Dam Lake in Togo. Int J Appl Agric Sci. 2022;8(4):185-191. doi: 10.11648/j.ijaas.20220804.17

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@article{10.11648/j.ijaas.20220804.17,
  author = {Gnimassoun Gbêssi Jean Baptiste and Serigne Modou Sarr and Assou Delagnon and Segniagbeto Hoinsoude Gabriel},
  title = {Comparative Growth Dynamics and Exploitation of Lates niloticus (Linnaeus, 1758) and Oreochromis niloticus (Linnaeus, 1758) in the Nangbeto Dam Lake in Togo},
  journal = {International Journal of Applied Agricultural Sciences},
  volume = {8},
  number = {4},
  pages = {185-191},
  doi = {10.11648/j.ijaas.20220804.17},
  url = {https://doi.org/10.11648/j.ijaas.20220804.17},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijaas.20220804.17},
  abstract = {The main objective of this study is to characterize the stock status of two of the most abundant fish species in the commercial catch, Lates niloticus (Linnaeus, 1758) and Oreochromis niloticus (Linnaeus, 1758) in order to propose a sustainable management measures for a resilient exploitation of both species. A total of 214 individuals of L. niloticus and 1088 individuals of O. niloticus were measured from July 2018 to November 2018. The total lengths ranged from 9.5 cm to 79.5 cm for L. niloticus and 8 cm to 34 cm for O. niloticus. The weights ranged from 13 g to 6300 g for L. niloticus and from 11 g to 635 g for O. niloticus. The study of the growth dynamics from the frequencies of grouped lengths was done by using the FISAT II software version 1.2.2. The asymptotic lengths found are 83.48 cm and 35.7 cm respectively for L. niloticus and O. niloticus while their respective growth coefficients are 0.03 year-1 and 0.07 year-1. The growth performance indices obtained are Φ' = 2.32 for L. niloticus and Φ' = 1.95 for O. niloticus. Total, natural and fishing mortality rates were Z = 0.33 yr-1, M=0.13yr-1, F = 0.20 yr-1 for L. Niloticus and Z = 0.84 yr-1, M = 0.29yr-1, F = 0.55 yr-1 for O. niloticus. The species at Nangbeto dam lake live in poor habitat conditions with fairly low condition factors 1.88 for L. niloticus and 1.99 for O. niloticus. They both show minority allometry. The weight-length relationship parameters are respectively a = 0.061 and b = 2.54 (r2 = 0.92) and a = 0.067 and b = 2.58 (r2 = 0.96) for L. niloticus and O. niloticus. Both species are over-exploited (E = 0.60 for L. niloticus E = 0.65 for O. niloticus). Overall, given that Nangbeto dam lake has an important place in the supply of protein of halieutic origin to the riparian communities and to the Togolese population, our study revealed that both L. niloticus and O. niloticus are overexploited. The species fishing related mortality rates are far greater than their natural mortality rates. Their total mortality rates are higher than their growth rates. The stocks of both species are undergoing a depletion. An extension of the biological resting period and the regulation of the fishing mesh sizes could be implemented as sustainable management measures for the renewal of fish stocks in the Nangbeto dam lake.},
 year = {2022}
}

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