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.
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 was conducted at the vegetable field of department of
horticulture and landscape design, college of agriculture and forestry ,Mosul
university, during spring of 2007 and 2008, to study the effect of times and
levels of nitrogen fertiliz
ation on some characters vegetative growth, flowering
,and yield of summer squash .Result indicated that, the time of nitrogen
fertilization at the stage of fruit-set caused a significant increased in the leaf
number /plant ,length of the plant and the fresh weight/plant. While the time of
nitrogen fertilization wasn't affected significantly the total yield. The level at
320 kg.N/ha caused a significant increase of the characters vegetative growth
and total yield. Also result revealed that, the interaction between the stage at
fruit set and nitrogen fertilization at 320 kg.N/ha led to increase the total yield
.The yield was found to positively correlation with the plant length ,fresh and
dry weights of plant, leaf area, fruit weight, male and female flowers, and the
sex ratio.
