Beta
210808

Length-weight relationship and population parameters of the sea bream, Sparus aurata (Linnaeus, 1758) in Abu Qir Bay, Mediterranean Sea, Egypt

Article

Last updated: 01 Jan 2025

Subjects

-

Tags

-

Abstract

The present work aimed to study some biological and population parameters of Sparus aurata in Abu Qir Bay, Alexandria to understand the status of its stock and give essential information to assess proper management for this species in the bay. A total of 1029 random specimens of gilt-head sea bream, S. aurata were monthly collected from commercial catch in the landing site at Abu Qir Bay during the period from January 2020 to January 2021.  For each fish sample, total length (cm) and total weight (g) were measured, and scales were used for age determination. The total scales' radius and the radius of each annulus were calculated to the nearest 0.01 cm.  The back-calculation method was used to estimate growth in length and weight at the end of each year. Results of the length-weight relationship showed that the growth of S. aurata in Abu Qir Bay fishery is nearly isometric (b: 3.01). The longevity of  S. aurata was more than 5 years. The maximum increment of the linear growth occurred by the end of the first year of life (15.61 cm), but the maximum value of increment in weight (69.95 g) was recorded at age group IV+. Age groups I+ and  II+ were the most abundant amounting 55.6% of its total catch.  The length at first capture (Lc)was 18.96 cm. Total, natural and fishing mortality rates for S. aurata were 1.16 yr-1, 0.56 yr−1 and 0.60 year−1, respectively. Growth parameters were calculated as L∞ = 35.49 cm, K = 0.25 yr-1 and t0 = -1.27 yr.  Exploitation rate (E = 0.52) indicates that the stock of sea bream was  slightly higher than that optimally exploited stock.

DOI

10.21608/ejabf.2021.210808

Keywords

Sparus aurata, length-weight, population, age and growth, Mortality rates, Exploitation

Authors

First Name

Mohammed

Last Name

G. Desouky et al.

MiddleName

-

Affiliation

-

Email

-

City

-

Orcid

-

Volume

25

Article Issue

6

Related Issue

29475

Issue Date

2021-12-01

Receive Date

2021-12-26

Publish Date

2021-12-01

Page Start

97

Page End

109

Print ISSN

1110-6131

Online ISSN

2536-9814

Link

https://ejabf.journals.ekb.eg/article_210808.html

Detail API

https://ejabf.journals.ekb.eg/service?article_code=210808

Order

8

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

Length-weight relationship and population parameters of the sea bream, Sparus aurata (Linnaeus, 1758) in Abu Qir Bay, Mediterranean Sea, Egypt

Details

Type

Article

Created At

22 Jan 2023