Journal of Water Resources and Ocean Science

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Gonadal State and Condition Factor of Oreochromis Niloticus (Linnaeus 1758)in a Hypereutrophic Lake

Received: 18 September 2013    Accepted:     Published: 10 November 2013
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Abstract

Condition factor, sexual maturity and length-weight relationship of 1132 Oreochromis niloticusinhabiting the hypereutrophic Lake Chivero in Zimbabwe were studied. Fish samples were collected through gill netting and from selected commercialfisheries around the lake from February - November 2011. Comparative analysis of age and size at maturity revealed that the O. niloticus reached maturity at 30±2.5 mm males and 50±3.6 mm females in total length. There was a significant difference in sexual maturity in both sexes with the inactive (I) stage more frequent. Both sexes of fish indicated a negative allometric increase in weight.August and November were determined as the most intensive and sensitive breeding periods for O. niloticus in Lake Chivero.Fishing activities in the lake need to be regulated in tandem with the breeding cycles of the O. niloticus.

DOI 10.11648/j.wros.20130206.12
Published in Journal of Water Resources and Ocean Science (Volume 2, Issue 6, December 2013)
Page(s) 165-169
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

Allometric Growth,Maturity Stage, Oreochromis Niloticus, Pollution

References
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[16] Mahomoud, W. F., Amin, A. M.M., Elboray, K. F., Ramadhan, A. M., and El-Halfwy, M. M. M.K. O. 20Reproductive biology and some observation on the age, growth and management of Tilapia zilli.(Gerv, 1848), from Lake Timsah, Egypt.International Journal.3: 15-25.
[17] Cherif, M. Zarrad, R. Gharbi, R and Hechmi J. 2008. Length –weight relationship for 11 fish species from the Gulf of Tunis. Pan American Journal of Aquatic Sciences, 4: 67-72.
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Author Information
  • Chinhoyi University of Technology, Department of Wildlife and Safari Management P. Bag 7724, Chinhoyi

  • Chinhoyi University of Technology, Department of Wildlife and Safari Management P. Bag 7724, Chinhoyi

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  • APA Style

    Beaven Utete, Edmore Happison Chikova. (2013). Gonadal State and Condition Factor of Oreochromis Niloticus (Linnaeus 1758)in a Hypereutrophic Lake. Journal of Water Resources and Ocean Science, 2(6), 165-169. https://doi.org/10.11648/j.wros.20130206.12

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    Beaven Utete; Edmore Happison Chikova. Gonadal State and Condition Factor of Oreochromis Niloticus (Linnaeus 1758)in a Hypereutrophic Lake. J. Water Resour. Ocean Sci. 2013, 2(6), 165-169. doi: 10.11648/j.wros.20130206.12

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    AMA Style

    Beaven Utete, Edmore Happison Chikova. Gonadal State and Condition Factor of Oreochromis Niloticus (Linnaeus 1758)in a Hypereutrophic Lake. J Water Resour Ocean Sci. 2013;2(6):165-169. doi: 10.11648/j.wros.20130206.12

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  • @article{10.11648/j.wros.20130206.12,
      author = {Beaven Utete and Edmore Happison Chikova},
      title = {Gonadal State and Condition Factor of Oreochromis Niloticus (Linnaeus 1758)in a Hypereutrophic Lake},
      journal = {Journal of Water Resources and Ocean Science},
      volume = {2},
      number = {6},
      pages = {165-169},
      doi = {10.11648/j.wros.20130206.12},
      url = {https://doi.org/10.11648/j.wros.20130206.12},
      eprint = {https://download.sciencepg.com/pdf/10.11648.j.wros.20130206.12},
      abstract = {Condition factor, sexual maturity and length-weight relationship of 1132 Oreochromis niloticusinhabiting the hypereutrophic Lake Chivero in Zimbabwe were studied. Fish samples were collected through gill netting and from selected commercialfisheries around the lake from February - November 2011. Comparative analysis of age and size at maturity revealed that the O. niloticus reached maturity at 30±2.5 mm males and 50±3.6 mm females in total length. There was a significant difference in sexual maturity in both sexes with the inactive (I) stage more frequent. Both sexes of fish indicated a negative allometric increase in weight.August and November were determined as the most intensive and sensitive breeding periods for O. niloticus in Lake Chivero.Fishing activities in the lake need to be regulated in tandem with the breeding cycles of the O. niloticus.},
     year = {2013}
    }
    

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    T1  - Gonadal State and Condition Factor of Oreochromis Niloticus (Linnaeus 1758)in a Hypereutrophic Lake
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    AU  - Edmore Happison Chikova
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    AB  - Condition factor, sexual maturity and length-weight relationship of 1132 Oreochromis niloticusinhabiting the hypereutrophic Lake Chivero in Zimbabwe were studied. Fish samples were collected through gill netting and from selected commercialfisheries around the lake from February - November 2011. Comparative analysis of age and size at maturity revealed that the O. niloticus reached maturity at 30±2.5 mm males and 50±3.6 mm females in total length. There was a significant difference in sexual maturity in both sexes with the inactive (I) stage more frequent. Both sexes of fish indicated a negative allometric increase in weight.August and November were determined as the most intensive and sensitive breeding periods for O. niloticus in Lake Chivero.Fishing activities in the lake need to be regulated in tandem with the breeding cycles of the O. niloticus.
    VL  - 2
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