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52050

Age and growth, mortality and exploitation ratio of Epinephelus summana (Forsskål, 1775) and Cephalopholis argus (Schneider, 1801) from the Egyptian Red Sea coast, Hurghada fishin

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Last updated: 01 Jan 2025

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Abstract

The age and growth of two grouper fish species, Epinephelus summana (Forsskål, 1775) and Cephalopholis argus (Schneider, 1801) from the Egyptian Red Sea off Hurghada, were studied based on the otolith readings. The maximum longevity of the two species was 10 and 6 years for E. summana and C. argus respectively. The age group II was the most dominant age group in the catch forming 46.09 % for E. summana and 22.33% for C. argus from the total collected samples. The asymptotic standard length (L∞) and the growth coefficient (K) were estimated as 63.39 cm and 0.13 year-1 for E. summana and 44.22 cm; and 0.26 year-1 and C. argus, respectively. The total mortality was computed as 0.82 and 1.31 year-1 for E. summana and C. argus, respectively. The mean values of natural mortality were 0.33 and 0.56 year-1 for E. summana and C. argus, respectively. Accordingly, the fishing mortality rates were estimated as 0.49 and 0.75 year-1 for E. summana and C. argus, respectively. The exploitation rates of E. summana (0.6) and C. argus (0.57) along with the fishing mortality rates reflect the overexploitation situation of the two serranid species in the Egyptian Red Sea.

DOI

10.21608/ejabf.2019.52050

Keywords

Epinephelus summana, Cephalopholis argus, Red Sea, Age, Growth, mortality

Authors

First Name

Sahar

Last Name

F. Mehanna

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Orcid

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First Name

Yassein

Last Name

A. A. Osman

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Orcid

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First Name

Magdy

Last Name

T. Khalil

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Orcid

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First Name

Arafa

Last Name

Hassan

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Volume

23

Article Issue

4

Related Issue

7732

Issue Date

2019-10-01

Receive Date

2019-09-14

Publish Date

2019-10-01

Page Start

65

Page End

75

Print ISSN

1110-6131

Online ISSN

2536-9814

Link

https://ejabf.journals.ekb.eg/article_52050.html

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https://ejabf.journals.ekb.eg/service?article_code=52050

Order

6

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Original Article

Type Code

103

Publication Type

Journal

Publication Title

Egyptian Journal of Aquatic Biology and Fisheries

Publication Link

https://ejabf.journals.ekb.eg/

MainTitle

Age and growth, mortality and exploitation ratio of Epinephelus summana (Forsskål, 1775) and Cephalopholis argus (Schneider, 1801) from the Egyptian Red Sea coast, Hurghada fishing area

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Article

Created At

22 Jan 2023