CERTIFICATE

IMPACT FACTOR 2021

Subject Area

  • Life Sciences / Biology
  • Architecture / Building Management
  • Asian Studies
  • Business & Management
  • Chemistry
  • Computer Science
  • Economics & Finance
  • Engineering / Acoustics
  • Environmental Science
  • Agricultural Sciences
  • Pharmaceutical Sciences
  • General Sciences
  • Materials Science
  • Mathematics
  • Medicine
  • Nanotechnology & Nanoscience
  • Nonlinear Science
  • Chaos & Dynamical Systems
  • Physics
  • Social Sciences & Humanities

Why Us? >>

  • Open Access
  • Peer Reviewed
  • Rapid Publication
  • Life time hosting
  • Free promotion service
  • Free indexing service
  • More citations
  • Search engine friendly

Investigations on gametogenesis and gonadal indices in the veined squid doryteuthis forbesii (steenstrup, 1856) (cephalopoda -loliginidae)

Author: 
Abdullah Bedeer Hussein and Gaber Ahmed Saad
Subject Area: 
Life Sciences
Abstract: 

Knowledge of the maturation process is vital to understand the relationship between spawning stock andrecruitment. The purpose of the present study was to validatethe reproductive cycle of Doryteuthis forbesii using histological and statistical procedures. The changes in gonad during sexual maturation permitted the determination of different histological stages for oogenesisin 12 phases and spermatogenesis in 7 phases. This species spawns throughout the year with two peaks during spring and summer. During oogenesis the oocyte becomes progressively more elongated, with a subsequent narrow elongation of the apical zone forming the oocyte peduncle. Finally the oocytes turn smooth (chorion becomes the outer surface when the follicular cells disintegrate) and free, finally reaching the oviducts. The spermatogonia and the primary spermatocytes are difficult to distinguish from each other, both being relatively large cells with a large, distinct nucleus. The first meiotic division occured, and the primary spermatocytes become secondary spermatocytes. A second meiotic division occurred immediately afterwards, so the secondary spermatocytes become spermatids. The transformation of the spermatids to spermatozoa occurs by a process of differentiation known as spermiogenesis. Morphologically, this differentiation involves the transformation of the cell from a round to an elongate shape. The spermatozoa are grouped around the lumen, towards the centre. As spermatozoa matured and released from the testis they passed directly to the spermaduct which is surrounded by complex accessory glands. The first glands inactivate the spermatozoa and others cover the sperm mass with different secretions to form the spermatophore. Spermatophores usually accumulate in the Needham sac. Spawning season was determined by calculating the different stages of oocyte development in the four seasons of the year using three methods. One Way Analysis of Variance (ANOVA) with p˂0.05 and Newman-Keuls Multiple Comparison Test with P < 0.01and P > 0.05 were applied to compare the different stages of oocyte development in the four seasons of the year. The gonadosomatic index (GSI) for both sexes and the nidamental gland–somatic index (NSI) for the females, were calculated and commented.This study provided evidence suggesting that Doryteuthis forbesii is an intermittentspawner.

PDF file: 

CALL FOR PAPERS

 

ONLINE PAYPAL PAYMENT

IJMCE RECOMMENDATION

Advantages of IJCR

  • Rapid Publishing
  • Professional publishing practices
  • Indexing in leading database
  • High level of citation
  • High Qualitiy reader base
  • High level author suport

Plagiarism Detection

IJCR is following an instant policy on rejection those received papers with plagiarism rate of more than 20%. So, All of authors and contributors must check their papers before submission to making assurance of following our anti-plagiarism policies.

 

EDITORIAL BOARD

CHUDE NKIRU PATRICIA
Nigeria
Dr. Swamy KRM
India
Dr. Abdul Hannan A.M.S
Saudi Arabia.
Luai Farhan Zghair
Iraq
Hasan Ali Abed Al-Zu’bi
Jordanian
Fredrick OJIJA
Tanzanian
Firuza M. Tursunkhodjaeva
Uzbekistan
Faraz Ahmed Farooqi
Saudi Arabia
Eric Randy Reyes Politud
Philippines
Elsadig Gasoom FadelAlla Elbashir
Sudan
Eapen, Asha Sarah
United State
Dr.Arun Kumar A
India
Dr. Zafar Iqbal
Pakistan
Dr. SHAHERA S.PATEL
India
Dr. Ruchika Khanna
India
Dr. Recep TAS
Turkey
Dr. Rasha Ali Eldeeb
Egypt
Dr. Pralhad Kanhaiyalal Rahangdale
India
DR. PATRICK D. CERNA
Philippines
Dr. Nicolas Padilla- Raygoza
Mexico
Dr. Mustafa Y. G. Younis
Libiya
Dr. Muhammad shoaib Ahmedani
Saudi Arabia
DR. MUHAMMAD ISMAIL MOHMAND
United State
DR. MAHESH SHIVAJI CHAVAN
India
DR. M. ARUNA
India
Dr. Lim Gee Nee
Malaysia
Dr. Jatinder Pal Singh Chawla
India
DR. IRAM BOKHARI
Pakistan
Dr. FARHAT NAZ RAHMAN
Pakistan
Dr. Devendra kumar Gupta
India
Dr. ASHWANI KUMAR DUBEY
India
Dr. Ali Seidi
Iran
Dr. Achmad Choerudin
Indonesia
Dr Ashok Kumar Verma
India
Thi Mong Diep NGUYEN
France
Dr. Muhammad Akram
Pakistan
Dr. Imran Azad
Oman
Dr. Meenakshi Malik
India
Aseel Hadi Hamzah
Iraq
Anam Bhatti
Malaysia
Md. Amir Hossain
Bangladesh
Ahmet İPEKÇİ
Turkey
Mirzadi Gohari
Iran