82016

Age precision and growth rate of Rhabdosargus haffara (Forsskål, 1775) from Hurghada fishing area, Red Sea, Egypt

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Last updated: 01 Jan 2025

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Abstract

The age and growth of the haffara seabream, Rhabdosargus haffara (Forsskål, 1775) from Hurghada fishing area, Red sea, Egypt, were investigated using a sample of 466 specimens. The fish length varied between 12.7 and 27.2 cm and the weight from 38.1 to 293.2 g. Samples were collected from the artisanal fisheries during the fishing season from August 2018 to July 2019. The relationship between the body lengths (total, fork and standard length in cm) and the body weight (g) was found to be significant (p < 0.05). The relationship between the body length and weight regarding the sex effect was insignificant for all samples (log W- log TL, ANCOVA, p > 0.05). The relationship between length and weight was estimated by a power regression function, with a scaling factor at a = 0.0106 for both females and males and 0.0107 for the combined sexes, the exponent b = 3.13, 3.13 and 3.129 for females, males and for all samples, respectively. Age was determined using the whole otolith and the maximum age of haffara was 5 years old for females and males. The otolith readings indicated good agreement between the two readers with an agreement = 88.35%, CV = 3.93% and APE = 2.78%. The von Bertalanffy growth parameters were estimated at TL = 30.13 cm, k = 0.35 y–1, and t0 = –0.24 y for females, TL = 30.49 cm, k = 0.36 y–1, and t0 = –0.26 y for males, TL= 30,47 cm, k = 0.36 y–1, and t0 = –0.26 y for the combined sexes.  

DOI

10.21608/ejabf.2020.82016

Keywords

Age precision, Growth, Rhabdosargus haffara, Hurghada, Red Sea, Egypt stock assessment

Authors

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Yassein

Last Name

A. A. Osman

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First Name

Sahar

Last Name

F. Mehanna

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First Name

Samia

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M. El-Mahdy

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First Name

Ashraf

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S. Mohammad

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First Name

Kelig

Last Name

Mahe

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Volume

24

Article Issue

2

Related Issue

11482

Issue Date

2020-03-01

Receive Date

2020-03-18

Publish Date

2020-03-01

Page Start

342

Page End

352

Print ISSN

1110-6131

Online ISSN

2536-9814

Link

https://ejabf.journals.ekb.eg/article_82016.html

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https://ejabf.journals.ekb.eg/service?article_code=82016

Order

22

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Original Article

Type Code

103

Publication Type

Journal

Publication Title

Egyptian Journal of Aquatic Biology and Fisheries

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

MainTitle

Age precision and growth rate of Rhabdosargus haffara (Forsskål, 1775) from Hurghada fishing area, Red Sea, Egypt

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Article

Created At

22 Jan 2023