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2122

Age, growth, mortality rates and corresponding yield estimates of the snubnose emperor Lethrinus borbonicus from south Sinai coast, Gulf of Suez, Egypt

Article

Last updated: 01 Jan 2025

Subjects

-

Tags

Fisheries

Abstract

Age-based demographic analysis were conducted to assess the current status of fished stock of the snubnose emperor Lethrinus borbonicus in South Sinai coast, Gulf of Suez, Red Sea. L. borbonicus is one of the most abundant emperors in the area, representing about 10% of the total artisanal fishery in south Sinai coast. Seasonal samples were collected from the commercial small scale fishery during the period from June 2005 until April 2007. The otoliths were used for age determination. Validation of the ageing method was carried out by analyzing the seasonal length frequency distributions. The life span was found to be four years. The estimated von Bertalanffy growth parameters from otolith age reading were L∞= 36.76 cm, K= 0.344year-1 and to= -0.321. Instantaneous rates of fishing mortality (F) were beyond the
limit reference point compared with estimated instantaneous rates of natural mortality (M), indicating that there is currently a risk to the sustainability of that stock. Results of the exploitation rate (E=0.583) and relative yield per recruit showed that the snubnose resource in the Gulf of Suez is overexploited and that small 16 individuals
are the target of the fishery referring to recruitment overfishing also. Some implications for the fishery management for decreasing fishing effort are required. 

DOI

10.21608/ejabf.2012.2122

Keywords

Lethrinus borbonicus, Age, Growth, mortality, Gulf of Suez, Red Sea

Authors

First Name

Azza

Last Name

ElGanainy

MiddleName

-

Affiliation

National Institute of Oceanography and Fisheries, B.O. Box 182, Suez, Egypt

Email

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City

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Orcid

-

First Name

Amal

Last Name

Amin

MiddleName

-

Affiliation

National Institute of Oceanography and Fisheries, B.O. Box 182, Suez, Egypt

Email

-

City

-

Orcid

-

Volume

16

Article Issue

2

Related Issue

439

Issue Date

2012-05-01

Receive Date

2017-04-03

Publish Date

2012-05-01

Page Start

27

Page End

34

Print ISSN

1110-6131

Online ISSN

2536-9814

Link

https://ejabf.journals.ekb.eg/article_2122.html

Detail API

https://ejabf.journals.ekb.eg/service?article_code=2122

Order

3

Type

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, growth, mortality rates and corresponding yield estimates of the snubnose emperor Lethrinus borbonicus from south Sinai coast, Gulf of Suez, Egypt

Details

Type

Article

Created At

22 Jan 2023