• 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. Osman, H., A. El Ganainy, A., M. Shaaban, A., A. Saber, M. (2021). Reproductive biology of the two commercially important grouper species Epinephelus summana and E. polyphekadion in the Egyptian coast of the Red Sea. Egyptian Journal of Aquatic Biology and Fisheries, 25(1), 665-679. doi: 10.21608/ejabf.2021.149343
Hanan M. Osman; Azza A. El Ganainy; Amgad M. Shaaban; Mahmoud A. Saber. "Reproductive biology of the two commercially important grouper species Epinephelus summana and E. polyphekadion in the Egyptian coast of the Red Sea". Egyptian Journal of Aquatic Biology and Fisheries, 25, 1, 2021, 665-679. doi: 10.21608/ejabf.2021.149343
M. Osman, H., A. El Ganainy, A., M. Shaaban, A., A. Saber, M. (2021). 'Reproductive biology of the two commercially important grouper species Epinephelus summana and E. polyphekadion in the Egyptian coast of the Red Sea', Egyptian Journal of Aquatic Biology and Fisheries, 25(1), pp. 665-679. doi: 10.21608/ejabf.2021.149343
M. Osman, H., A. El Ganainy, A., M. Shaaban, A., A. Saber, M. Reproductive biology of the two commercially important grouper species Epinephelus summana and E. polyphekadion in the Egyptian coast of the Red Sea. Egyptian Journal of Aquatic Biology and Fisheries, 2021; 25(1): 665-679. doi: 10.21608/ejabf.2021.149343

Reproductive biology of the two commercially important grouper species Epinephelus summana and E. polyphekadion in the Egyptian coast of the Red Sea

Article 39, Volume 25, Issue 1, January and February 2021, Page 665-679  XML PDF (654.84 K)
Document Type: Original Article
DOI: 10.21608/ejabf.2021.149343
View on SCiNiTO View on SCiNiTO
Authors
Hanan M. Osman; Azza A. El Ganainy; Amgad M. Shaaban; Mahmoud A. Saber
Abstract
Groupers have a high contribution to the coral reef community structure and balance. Various aspects of the reproductive biology of the two commercially species Epinephelus summana and Epinephelus polyphekadion were investigated for the first time in the Red Sea. A total of 246 individuals (125 E. summana and 121 E. polyphekadion) were collected from different landing sites on the Egyptian Red Sea from 2017 to 2019. Results showed that females outnumbered males in both species as the overall sex ratios (males: females) were 1:1.2 and 1:1.3 for E. summana and E. polyphekadion respectively. The size structure of E. summana and the presence of bisexual individual (34 cm. TL) provide strong evidence that this species is a protogynous hermaphrodite. For the camouflage grouper, no evidence was obtained to confirm hermaphroditism. Seasonal variations in gonado-somatic index revealed that the spawning occurred during April and May for E. summana and during May and June for E. polyphekadion. Lengths at first maturity (Lm50) for male and female of E. summana were 23.0 and 23.5cm, respectively. However, Lm50 for male and female E. polyphekadion were 27.1 cm and 28.8cm, respectively. Some of the spawning aggregation sites along the Egyptian Red Sea coast were identified by using information from experienced fishers. Both species were characterized by high fecundity. This study concluded that the results of the life history characteristics of these species are considered as good data, will add to the requirements of managing the exploitation of these valuable resources.
Keywords
Grouper fishes; Epinephelus summana; E. polyphekadion; Reproductive biology; Sex ratio; Sexual pattern; Spawning season; Fecundity
Statistics
Article View: 371
PDF Download: 678
Home | Glossary | News | Aims and Scope | Sitemap
Top Top

Journal Management System. Designed by NotionWave.