• Home
  • Browse
    • Current Issue
    • By Issue
    • By Author
    • By Subject
    • Author Index
    • Keyword Index
  • Journal Info
    • About Journal
    • Aims and Scope
    • Editorial Board
    • Publication Ethics
    • Indexing and Abstracting
    • Peer Review Process
  • Guide for Authors
  • Submit Manuscript
  • Contact Us
 
  • Login
  • Register
Home Articles List Article Information
  • Save Records
  • |
  • Printable Version
  • |
  • Recommend
  • |
  • How to cite Export to
    RIS EndNote BibTeX APA MLA Harvard Vancouver
  • |
  • Share Share
    CiteULike Mendeley Facebook Google LinkedIn Twitter
Egyptian Journal of Aquatic Biology and Fisheries
arrow Articles in Press
arrow Current Issue
Journal Archive
Volume Volume 29 (2025)
Volume Volume 28 (2024)
Volume Volume 27 (2023)
Volume Volume 26 (2022)
Volume Volume 25 (2021)
Issue Issue 6
Issue Issue 5
Issue Issue 4
Issue Issue 3
Issue Issue 2
Issue Issue 1
Volume Volume 24 (2020)
Volume Volume 23 (2019)
Volume Volume 22 (2018)
Volume Volume 21 (2017)
Volume Volume 20 (2016)
Volume Volume 19 (2015)
Volume Volume 18 (2014)
Volume Volume 17 (2013)
Volume Volume 16 (2012)
Volume Volume 15 (2011)
Volume Volume 14 (2010)
Volume Volume 13 (2009)
Volume Volume 12 (2008)
Volume Volume 11 (2007)
Volume Volume 10 (2006)
Volume Volume 9 (2005)
Volume Volume 8 (2004)
Volume Volume 7 (2003)
Volume Volume 6 (2002)
Volume Volume 5 (2001)
Volume Volume 4 (2000)
Volume Volume 3 (1999)
Volume Volume 2 (1998)
Volume Volume 1 (1997)
M. Abdelhak et al., E. (2021). Growth, Mortality, Yield Per Recruit and Management of Siganus rivulatus Stock from the Suez Canal, Egypt. Egyptian Journal of Aquatic Biology and Fisheries, 25(2), 437-455. doi: 10.21608/ejabf.2021.164596
Elham M. Abdelhak et al.. "Growth, Mortality, Yield Per Recruit and Management of Siganus rivulatus Stock from the Suez Canal, Egypt". Egyptian Journal of Aquatic Biology and Fisheries, 25, 2, 2021, 437-455. doi: 10.21608/ejabf.2021.164596
M. Abdelhak et al., E. (2021). 'Growth, Mortality, Yield Per Recruit and Management of Siganus rivulatus Stock from the Suez Canal, Egypt', Egyptian Journal of Aquatic Biology and Fisheries, 25(2), pp. 437-455. doi: 10.21608/ejabf.2021.164596
M. Abdelhak et al., E. Growth, Mortality, Yield Per Recruit and Management of Siganus rivulatus Stock from the Suez Canal, Egypt. Egyptian Journal of Aquatic Biology and Fisheries, 2021; 25(2): 437-455. doi: 10.21608/ejabf.2021.164596

Growth, Mortality, Yield Per Recruit and Management of Siganus rivulatus Stock from the Suez Canal, Egypt

Article 22, Volume 25, Issue 2, March and April 2021, Page 437-455  XML PDF (947.82 K)
Document Type: Original Article
DOI: 10.21608/ejabf.2021.164596
View on SCiNiTO View on SCiNiTO
Author
Elham M. Abdelhak et al.
Abstract
Siganus rivulatus is considered one of the most successful Lessepsian migrant fish, yet the scarce of studies about its population structure in new habitats of the Suez Canal is clearly realized. In the present study, the yield per recruit of S. rivulatus was estimated in Suez Canal based on investigation of growth parameters, mortality coefficients and exploitation rate for 581 individuals collected seasonally from Ismailia during the period from autumn 2017 to summer 2018. Otolith was used for aging and estimation of the growth rates. Four years was the maximum attained age. The von Bertalanffy growth parameters were L∞= 25.356 cm, K= 0.288 y-1 andt0= -0.81 y. Total mortality coefficient (Z) was  1.57 y-1, natural mortality (M)= 0.573 y-1 and fishing mortality (F)= 1. 002 y-1. The length at the first capture (Lc= 12.838 cm) was found to be smaller than the lengths of first maturation (Lm= 14.5 and 15.15 cm for male and female, respectively). This may cause a great reduction in the stock due to harvesting small pre-spawning fish. Hence, the exploitation level was estimated recording a value of (E)= 0.636 y-1, which indicated that the stock of Siganus rivulatus in the Suez Canal is currently overexploited. Therefore, conservation of this stock is a must, which can be achieved by increasing the allowable mesh size to give a chance to each individual to reproduce at least once and reducing the exploitation rate from 0.636 to 0.355 y-1 to maintain a sufficient (50%) of the spawning stock biomass.
Keywords
Siganus rivulatus; Suez Canal; growth; mortality; exploitation rate; population dynamic; management
Statistics
Article View: 351
PDF Download: 597
Home | Glossary | News | Aims and Scope | Sitemap
Top Top

Journal Management System. Designed by NotionWave.