This study was carried out on /516/ fish individuals of Chub Mackerel Scomber
japonicus (Houttuyn, 1782), which were caught from the Coastal water of Latakia
province (Levantine basin) from December 2014 to November 2015, to identify the
evolution
stages of sexual maturity (by morphological and histological methods)
and determine the spawning period of this important economic species. The results
showed that Scomber japonicus begin with sexual maturity from the beginning of
February and extend until mid-May, with a single peak in Mars. The average value
of the gonado-somatic index (GSI) was (12.46 ± 1.52)% for males and (13.21 ± 3.9)% for
female in Mars. And the total body length at sexual maturity was (21.5) cm for
males, and was (23.5) cm for females. The development stages and gonad maturation
in this specie, are similar with regard to the tissue and the form of gonads and
according to the six gonad maturation steps.
The objective of this study was to evaluate the correlation between
CVM stage and chronological age in a group of Syrian population.
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.
The important health benefits of pomegranate fruit is Attributable to its
high concentration of polyphenolic compounds. This compounds concentration
is likely to be affected by cultivar, environment and development stage of fruits.
In this study,
some physic-chemical characteristics along with minerals (K,
Ca, Mg, and Fe) were determined in fruit during maturation stages every 20
day from 30 to 150 day-old fruit of two pomegranate accessions ‘Helo
Erbin’(AE) and ‘Lafan Al-Hesn’ (AH) grown in Syria. The highest percentage
of aril and juice and lowest percentage of peel were observed in 150-day-old
fruit.
This study was investigated at the laboratories of Horticultural department,
Faculty of Agriculture, Damascus University to measure the changes in
oxidative and antioxidative parameters during tomato fruit growth. Hydrogen
peroxide (H2O2) and lipi
d peroxidation (MDA) contents were analysed as
indicators of oxidative processes. Results showed that H2O2 content decreased
during fruit growth phase and slightly increased during ripening, meanwhile
MDA content was found to increase only at the end of fruit ripening. The
activities of antioxidant enzymes (SOD, APX, CAT) were modified during fruit
growth. Activities of SOD, APX increased during fruit growth phase,
meanwhile CAT activity increased during fruit maturation. The level of
ascorbate increased during fruit growth. These changes in antioxidant
metabolites and enzymes establish that the antioxidant system plays an
important role in the both phases of tomato fruit growth.
The effect of 1-MCP, CaCl2 and CaCl2 + 1-MCP treatments on the
respiration and ethylene production of ‘Cox’s Orange Pippin’ apples was
investigated. Treatments were applied at harvest and apples stored under air
storage (3°C or 10°C) for 0, 2, 4,
6, 8 and 10 weeks. At storage removal apples
were held at 20°C for 7 days shelf-life and respiration and ethylene production
measured. The CO2 rate in the CaCl2 and CaCl2 + 1-MCP treatments was
significantly lower than either the CaCl2 treatment or untreated control. The
CO2 rate reduced steadily during shelf-life especially for the 3°C stored fruit. A
significant effect of storage temperature on the CO2 rate during shelf-life could
not be determined. Application of 1-MCP or CaCl2+1-MCP decreased
significantly ethylene production during shelf-life at all storage periods.
This study aimed at checking the stability of some mutant lines from
soybean varieties in different locations and to select the best performing lines in
each location.
These lines 15 were selected according to previous experiments as being
early
maturing and/or that yield higher than the control. The study lasted three
years, the experiment plants were grown in 3 locations: Raqa, Idleb and
Lattakia. The experiment was designed as RCBD with 3 replicates for each
variety.
Results showed significant difference between lines, Locations and year in
both earliness and yield, A significant interaction was realized between (line X
location) and (line X year) for earliness and yield. For earliness (line X year)
was not significant. The reverse situation was realized for yield. Location. X
year of yield and earliness was significant. Earliness was correlated positively
with all characters (except for 100-seed-weight).
Yield was positively and significantly correlated with characters of all lines.
Three lines with higher yield than the control (142.61%) and same maturity
time were selected.
