أُجريت هذه الدراسة على النوع Sparus aurata (Sparidae)، و الذي تم اصطياده من عدة مناطق على امتداد الساحل السوري، خلال الفترة الممتدة بين آذار 2012 و شباط 2014، و قد بلغ عدد الأفراد (297) فرداً تراوحت أطوالها الكلية بين (31-15)سم و أوزانها الكلية بين (410.34-53.1)غ.
أظهرت دراسة مؤشر النضج الجنسي (GSI) أن فترة التكاثر تقع بين تشرين الثاني و شباط بالنسبة للذكور و الإناث، مع ذروة نضج واضحة في شهر كانون الثاني (3.98±0.97)% للإناث و في شهر كانون الأول (2.19±0.29)% للذكور، و أن الطول عند أول نضج جنسي هو (21.5،22.5) سم للذكور و الإناث على التوالي. و كانت نتائج مؤشر وزن الكبد النسبي (HSI) متوافقة مع التغيرات البيئية المحيطة و التغيرات الفيزيولوجية الناتجة عن تغير النشاط الجنسي خلال دورة التكاثر. كما أظهرت دراسة الخصوبة مجالاً واسعاً للمجموعات الطولية المدروسة، و كانت علاقة الخصوبة المطلقة مع كل من الطول الكلي و الوزن الكلي علاقة خطية، و تراوحت الخصوبة النسبية بين (567896- 849362) بيضة لكل 1كغ من وزن الجسم. أظهرت دراسة التوزع التكراري لأقطار البيوض وجود قمة واحدة في منحني التوزع، و تراوحت أقطار البيوض خلال موسم التكاثر بين (0.05-0.3) مم.
This study has been done on Sparus aurata (Sparidae). Fish samples (297
individuals) were collected along the Syrian Coast from March 2012 to February 2014.
Total length (T) was 15 - 31 cm, and the total weight (W) was 53,1 - 410,34 g. The study
of gonado somatic index (GSI) showed that the reproduction period was between
November and February with a maturity peak in January (3.98±0.97)% for females ,and in
December (2.19±0.29)% for males. In addition, the length at the first sexual maturity was
(21.5 cm) and (22.5 cm) for males and females respectively. The results of the hepato
somatic index (HSI) was compatible with the surrounding environmental and physiological
changes which resulted from the change of sexual activity during the reproductive cycle.
Fecundity showed a wide range for a given length, there was a linear relationship between
the absolute fecundity and each of length groups and total weight. Relative fecundity was
(567896-849362) egg per 1kg body weight. The frequency distribution of eggs diameters
revealed the presence of one peak, and the eggs diameter during the reproduction period
ranged from 0.05 to 0.3mm.
References used
AHMED,M.S. Population dynamics and fisheries management of Gilthead sea bream, Sparus aurata (f.sparidae) from Baradawil lagoon, North Sinai,Egypt. Egept J. Aquat.Biol.&fish.15,2011,57-69
Al-ABSAWY,M.A.The reproductive biology and the histological and ultrastructural characteristics in ovaries of the female Gadidae fish Merluccius merluccius from the Egyptian Mediterranean water. African Journal of Biotechnology Vol. 9(17),2010, pp. 2544-2559
ALMANSA, E.; MARTIN,M.V.; CEJAS,J.R.; BADIA, P.; JEREZ,S. and LORENZO,A. Lipid and fatty acid composition of female gilthead seabream during their reproductive cycle: effects of a diet lacking n-3 HUFA. J. Fish Biol., 59,2001, 267-286
The aim of study was to determine the dates of breeding and sexual maturity for
Marsupenaeus japonicus in Lattakia coast as introduce for hatching and culturing it.
The specimens were collected from the sea water of Ibn-Hany area at the north of
L
A total of 410 Sardinella aurita Fish , were collected from Syrian coast during the
period from April 2014 to March 2015.Total length and weight ranged between 81 – 270
mm, 6.94 –137.29g respectively. The aim of present study was to illustrated som
The research dealt, for the first time, with the identification of
reproductive times and developmental stages of both ovaries and
testes of pearl oyster Pinctada radiata in Syrian regional waters,
which may serve as an introduction to its rearing and culturing.
This study aims to define bird species that use artificial lakes in Syrian coast, and
evaluate their population size for management and protection of wildlife. Four different
sites were chosen in Syrian coast, which considered the most important ar
Through this research, case studies were reviewed which reviewed the dermatology department at Tishreen University Hospital in Lattakia and specialized centers for leishmaniasis and parasitic diseases in Lattakia and Tartous governorates from the beg