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
e aspects
of reproduction biology for Sardinella aurita. .
Gonads Somatic Index (G.S.I.) for female and male recorded highest value in early
June 4.22 and 5.80 respectively. Male and females round sardinella reach first sexual
maturity at total length (17.97 cm and 18.67 cm respectively).
Mean absolute fecundity (FA) increased with body length ( ) and
weight ( ), with an average of 20714.79 ±4876.21 oocytes produced per
spawning female. Relative fecundity (FR) ranged between 242 and 285 oocytes/g of body
weight (average: 266.17 ±21.49 oocytes/g).
The study on the frequency distribution of eggs diameters revealed the presence of
one beak of sardinella aurita. The egg diameters of sardinella aurita ranged between
0.2mm -0.7mm with an average 0.45±0.18 mm.
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
o
f 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.
This research deels for the first time the studying fecundity of species blue crab
Portunus pelagicus in our regional waters which as an introduction to breeding and culture.
This research carried out in the period from September 2011 until January
2013.
At the following three region of Lattakia coast : Fishing bort and picnic area, Ibn
Hanni area and Southern Corniche area.Biomonthly samples were collected from Littoral
and Sublittoral area of 8-18m deeps.
Studies results revealed as the following:
The number of mature females 240 female, Ranged: carapace length 4.6-7.9cm
Carapace width between 5.2-13.8cm and body weight between 49.2-171.45 g .
Spawning takes plase during the period from May until December and the rate of the
highest in the month of October.
Absolute fecundity in females of this species was ranged between 21435-143510
eggs, and relative fecundity was ranged between 1924-766651 eggs/g, and the eggs
diameters ranged between 0.25-0.45 mm.
Three hundreds- Awassi yearlings, ١٨-١٩ months old, ٤٠ ± ١ kg weight,
٢,٥-٣ months post first lambing, were used to study the efficiency of hormonal
treatment in synchronizing estrus and increasing lambing rate with a program
of having two lambs p
er year. Ewes were randomly and equally divided into
three groups.
