DSpace

OceanDocs >
Africa >
Egypt >
National Institute of Oceanography and Fisheries >
Egyptian Journal of Aquatic Research >

Please use this identifier to cite or link to this item: http://hdl.handle.net/1834/1905

Title: Reproductive biology and histological studies of the grey mullet, liza ramada, (risso, 1826) in lake timsah, suez canal
Other Titles: دراسة بيولوجية وهستولوجية لتكاثر سمكة الطوبارة فى بحيرة التمساح – قناة السويس
Authors: Ramadan, A.M.
El-Halfawy, M.M.
Mahmoud, W.F.
ASFA Terms: Histology
Reproductive cycle
Mullet fisheries
Issue Date: 2007
Publisher: National Institute of Oceanography and Fisheries, Egypt
Citation: Egyptian journal of aquatic research, 33(1). p. 434-454
Abstract: Reproductive characteristics of Liza ramada in Timsah Lake showed that the male reaches first sexual maturity smaller than the female at a total body length of 14 cm. and 16 cm., respectively. Overall sex ratio is 1: 1.7 for males to females. The gonado-somatic index of males was lower than that of females. Where, the maximum GSI values were recorded in November 5.03 % and 12.4 % for males and females, respectively. The maturity stages of male and female Liza ramada are morphologically separated according to the changes in shape, size and colour of the gonad in different successive stages. These stages are virgin, maturing virgin, developing, developed, gravid and spent stages. Histologically, the oocyte maturation showed the following phases; first growth phase which includes chromatin stage, early and late perinucleolus stages. Second growth phase includes vacuolization stage, yolk stages (primary, secondary and tertiary), mature stage and ripe stage. The testes maturation classified into spermatogonia, primary spermatocytes, secondary spermatocytes, spermatids and spermatozoa. Different points of view which take place in this work show that of the spawning season of Liza ramada in Timsah lake which may be extending from November to January.
URI: http://hdl.handle.net/1834/1905
Related document: http://www.nodc-egypt.org/
ISSN: 1687-4285
Appears in Collections:Egyptian Journal of Aquatic Research

Files in This Item:

File Description SizeFormat
Text.pdfPublished version1.19 MBAdobe PDFView/Open
Arabic.pdfArabic Summary18.9 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.