Length-based growth, mortality, and biological reference points of Chrysichthys nigrodigitatus (Lacepède, 1803) from the Yeji arm of Lake Volta, Ghana

Samuel Amponsah

doi:10.3153/AR24002

EN

Length-based growth, mortality, and biological reference points of Chrysichthys nigrodigitatus (Lacepède, 1803) from the Yeji arm of Lake Volta, Ghana

Abstract

Individuals of Chrysichthys nigrodigitatus from Lake Volta, Ghana (West Africa), were examined between January and December 2020 for growth, mortality, and exploitation rate using total length measurement. Monthly length-frequency data were collected from 244 samples and analysed using the FiSAT II Tool. The estimated asymptotic total length (L∞), the coefficient of growth (K), and the calculated growth performance index (phi) were 27.3 cm, 0.57, and 2.63 pear year, respectively. The total mortality rate (Z), natural mortality rate (M), and fishing mortality rate (F) were 1.57, 0.92, and 0.66 pear year, respectively. The exploitation rate (E = 0.42) was below the optimum level of 0.5, which indicates that the species is underexploited. Based on the Emsy (0.56) value, analyses show that the exploitation rate is below the sustainable limit, hence the need for continuous monitoring of fishing efforts to ensure that the limit reference point is not exceeded.

Keywords

References

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Details

Primary Language

English

Subjects

Fisheries Management

Journal Section

Research Article

Authors

Samuel Amponsah ^*
0000-0001-5559-3139
Ghana

Early Pub Date

November 27, 2023

Publication Date

January 3, 2024

Submission Date

September 19, 2023

Acceptance Date

October 7, 2023

Published in Issue

Year 1970 Volume: 7 Number: 1

DOI

https://doi.org/10.3153/AR24002

IZ

https://izlik.org/JA92SM98KH

Cite

RIS / Bibtex

APA

Amponsah, S. (2024). Length-based growth, mortality, and biological reference points of Chrysichthys nigrodigitatus (Lacepède, 1803) from the Yeji arm of Lake Volta, Ghana. Aquatic Research, 7(1), 8-14. https://doi.org/10.3153/AR24002

Length-based growth, mortality, and biological reference points of Chrysichthys nigrodigitatus (Lacepède, 1803) from the Yeji arm of Lake Volta, Ghana

Abstract

Keywords

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References

Details

Primary Language

Subjects

Journal Section

Authors

Early Pub Date

Publication Date

Submission Date

Acceptance Date

Published in Issue

DOI

IZ

Cite