• 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)
Volume Volume 24 (2020)
Volume Volume 23 (2019)
Volume Volume 22 (2018)
Issue 5 (Special Issue)
Issue Issue 4
Issue Issue 3
Issue Issue 2
Issue Issue 1
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)
F. Ismail, R., M. K. Negm, R. (2018). Histochemical and fine structure studies of pituitary cell type distribution with special emphasis of gonadotrophs during annual reproductive cycle of the adult female white seabream (Diplodus sargus). Egyptian Journal of Aquatic Biology and Fisheries, 22(5 (Special Issue)), 175-187. doi: 10.21608/ejabf.2018.19516
Rania F. Ismail; Reham M. K. Negm. "Histochemical and fine structure studies of pituitary cell type distribution with special emphasis of gonadotrophs during annual reproductive cycle of the adult female white seabream (Diplodus sargus)". Egyptian Journal of Aquatic Biology and Fisheries, 22, 5 (Special Issue), 2018, 175-187. doi: 10.21608/ejabf.2018.19516
F. Ismail, R., M. K. Negm, R. (2018). 'Histochemical and fine structure studies of pituitary cell type distribution with special emphasis of gonadotrophs during annual reproductive cycle of the adult female white seabream (Diplodus sargus)', Egyptian Journal of Aquatic Biology and Fisheries, 22(5 (Special Issue)), pp. 175-187. doi: 10.21608/ejabf.2018.19516
F. Ismail, R., M. K. Negm, R. Histochemical and fine structure studies of pituitary cell type distribution with special emphasis of gonadotrophs during annual reproductive cycle of the adult female white seabream (Diplodus sargus). Egyptian Journal of Aquatic Biology and Fisheries, 2018; 22(5 (Special Issue)): 175-187. doi: 10.21608/ejabf.2018.19516

Histochemical and fine structure studies of pituitary cell type distribution with special emphasis of gonadotrophs during annual reproductive cycle of the adult female white seabream (Diplodus sargus)

Article 12, Volume 22, 5 (Special Issue), November 2018, Page 175-187  XML PDF (467.37 K)
Document Type: Original Article
DOI: 10.21608/ejabf.2018.19516
View on SCiNiTO View on SCiNiTO
Authors
Rania F. Ismail; Reham M. K. Negm
Laboratory of Fish Reproduction and Spawning, Aquaculture Division, National Institute of Oceanography & Fisheries, Kayet-bey, Alexandria, Egypt
Abstract
The ovarian cycle of  the female white seabream (Diplodus sargus) can be explained as five stages as follows:  Immature, Maturing, Nearly ripe , Ripe and Running and Spent stage, whereas the peak of gonadostmatic index was reported between January to April, with an average GSI value of 2.64 ± 0.6. The adenohypophysis of white seabream was investigated using histochemical and electron microscopy techniques. It can be subdivided into three distinct regions: rostral pars distails (RPD), proximal pars distails (PPD) and pars intermedia (PI). Six cell types were identified and localized in the adenohypophysis. The acidophilic prolactin (PRL) and adrenocorticotropic hormone secreting cell (ACTH) were found in the RPD region. The ACTH cells were generally arranged between neurohypophysis and PRL cells. The melanocyte stimulating hormone secreting cells (MSH) and somatotrops cells (STH) were acidophilic and detected in the PPD and RPD regions. The basophilic cells were gonadotrophic cells (GTH) and the thyrotrophic cells (TSH); one type of the GTH cells was detected in D. sargus pituitary. The GTH cells displayed variations through the reproductive cycle, while all four types of acidophilic cell and TSH cells did not show any variations in size and activity throughout the reproductive cycle. During immature and mature stages GTH cells showed the minimum granulation and smaller cell size, at nearly-ripe stage the GTH cells were characterized by intense accumulation of granules and reached to maximum diameters (p<0.05) as demonstrated by electron microscope. During ripening and running stage (from January to April), slight decrease in the GTH cell diameters and its staining affinity and granulation were observed. During the spent stage (from April to June) the GTH cells displayed faint stain with presence of vacuoles between cells with minimum amount of granulation.
Keywords
Pituitary gland; histochemistry; Electron Microscope; reproductive cycle; Diplodus sargus
Statistics
Article View: 597
PDF Download: 1,079
Home | Glossary | News | Aims and Scope | Sitemap
Top Top

Journal Management System. Designed by NotionWave.