Length-weight relationship and condition factor for five common fish species in a recently constructed reservoir (Tugwi-Mukosi Dam) - Zimbabwe

Nyasha Mabika; Terence Magqina; Tendai Makoni

doi:10.3153/AR24008

EN

Length-weight relationship and condition factor for five common fish species in a recently constructed reservoir (Tugwi-Mukosi Dam) - Zimbabwe

Abstract

Tugwi-Mukosi is a recently constructed reservoir in the Masvingo Province of Zimbabwe. The objective of the study was to estimate the length-weight relationship (LWR) and condition factors (K) of five freshwater fish species collected from the dam. Three hundred eighty-seven fish samples were caught by gill nets and sein between January and September 2021. The estimated exponent value b varied between 2.814 and 3.228 among the fish species. The b values indicated that three species (Oreochromis niloticus, Coptodon rendalli and Micropterus salmoides) followed negative allometric growth (b < 3). In contrast, Clarias garipinus showed isometric growth (b = 3), while Oreochromis mossambicus exhibited positive allometric growth (b > 3). More than 94% (R2 > 0.94) of the weights (responses) variations were explained by the models, so the models fit the data well. The K values of all the fish species, except for C. gariepinus, ranged between 1.3 - 2.2; this indicates that these species are doing well in the reservoir. This observation suggests that Tugwi-Mukosi currently provides a favourable habitat for the fish species. The current study's findings will give valuable baseline data for assessing the status of fish populations and conducting ecological surveys for future fish conservation and management.

Keywords

Supporting Institution

None

Ethical Statement

Ethical approval was not required for this study.

Thanks

We would like to extend our sincerest regards to Alfred Mhere, who provided invaluable support during the fieldwork. We also want to express our sincerest gratitude to the Zimbabwe Parks and Wildlife Management Authority for providing logistical and equipment support during the data collection.

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Details

Primary Language

English

Subjects

Fish Biology

Journal Section

Research Article

Authors

Nyasha Mabika ^*
0000-0002-8101-6340
Zimbabwe

Terence Magqina
0000-0001-5778-8167
Zimbabwe

Tendai Makoni
0000-0003-0853-7761
Zimbabwe

Early Pub Date

March 30, 2024

Publication Date

April 2, 2024

Submission Date

August 11, 2023

Acceptance Date

January 21, 2024

Published in Issue

Year 2024 Volume: 7 Number: 2

DOI

https://doi.org/10.3153/AR24008

IZ

https://izlik.org/JA25WS35MK

Cite

RIS / Bibtex

APA

Mabika, N., Magqina, T., & Makoni, T. (2024). Length-weight relationship and condition factor for five common fish species in a recently constructed reservoir (Tugwi-Mukosi Dam) - Zimbabwe. Aquatic Research, 7(2), 83-92. https://doi.org/10.3153/AR24008

Öz

Length-weight relationship and condition factor for five common fish species in a recently constructed reservoir (Tugwi-Mukosi Dam) - Zimbabwe

Abstract

Keywords

Supporting Institution

Ethical Statement

Thanks

References

Details

Primary Language

Subjects

Journal Section

Authors

Early Pub Date

Publication Date

Submission Date

Acceptance Date

Published in Issue

DOI

IZ

Cite