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POPULATION DYNAMICS OF THE CUTTLEFISH SEPIA DOLLFUSI (ADAM, 1941) IN THE GULF OF SUEZ, EGYPT

Article

Last updated: 01 Jan 2025

Subjects

-

Tags

Fisheries

Abstract

Basic population parameters of the cuttlefish Sepia dollfusi. in the Gulf of Suez were described from samples of commercial landing made between September 2002 and May 2003. A total of 600 5. dollfusi with mantle lengths ranged from 45 to 147 mm were studied. Age and growth were estimated using progression analysis model by applying Bhattacharya method. There were no significant differences in population parameters between sexes. The theoretical maximum length Lr. = 169 mm and the growth coefficient K = 0.91/ year. Total, natural and fishing mortalities were 3.57, 1.07 and 2.5 per year respectively. The exploitation ratio (E =0.7) suggests that the fishing pressure on S. dollfusi in the Gulf of Suez is high. Relative yield per recruit and relative biomass per recruit analysis showed that S. dollfusi stock in the Gulf df Suez in a situation of over-fishing. For the management purposes, the current exploitation rate should be reduced by about 51% to maintain a sufficient spawning biomass and the present length at first capture should be raised to about 86 mm ML.

DOI

10.21608/ejabf.2005.1814

Keywords

Sepia JoI!?u.\i. cephalopods, age and growth, mortality and exploitation rales, Recruitment, gear selectivity. management, Stock assessment

Authors

First Name

Sahar

Last Name

Mchanna

MiddleName

-

Affiliation

National Institute of Oceanography and Fisheries Sue/ and Aqaba Gulfs Branch,Egypt

Email

-

City

-

Orcid

-

First Name

Anial

Last Name

Amin

MiddleName

-

Affiliation

National Institute of Oceanography and Fisheries Sue/ and Aqaba Gulfs Branch,Egypt

Email

-

City

-

Orcid

-

Volume

9

Article Issue

1

Related Issue

388

Issue Date

2005-01-01

Receive Date

2017-03-30

Publish Date

2005-01-01

Page Start

1

Page End

14

Print ISSN

1110-6131

Online ISSN

2536-9814

Link

https://ejabf.journals.ekb.eg/article_1814.html

Detail API

https://ejabf.journals.ekb.eg/service?article_code=1814

Order

1

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

POPULATION DYNAMICS OF THE CUTTLEFISH SEPIA DOLLFUSI (ADAM, 1941) IN THE GULF OF SUEZ, EGYPT

Details

Type

Article

Created At

22 Jan 2023