our goal through this research to determine affecting
health services in the mortality rates in Syria and reduced to a smaller number
of default variables (factors), and provide mathematical models reflect the
estimated the impact of health servic
es in the studied mortality rates in Syria,
where we turned to the style factor analysis in the reduction of the number of
health services variables, and then multiple linear regression method in the
study of the decline of deaths variables on the health service factors and
reached a result, three mathematical models estimated the impact of health
services in deaths in Syria.
Most of the fish stocks in the world are threatened by overfishing
and/or degraded environmental conditions, stock assessment of
marine resources is therefore worldwide recognized as a major
matter. This study aims at highlighting the analytical models used
in the stocks assessment, which depend on the cohort analysis using
information on the length based method which used when only
length composition data for fishery.
An experiment was carried out using (350) one day-old broiler non
sexed chicks of commercial line. The birds were distributed into 7
groups (of 50 birds each).
Gypsy moth (Lymantriadispar) is polyphagous insect .Therefore we had conducted
an experiment to determine the influence of the following plant hosts(Malussp, Quercussp
,Prunus. armeniaca, Platanusprientalis, Pinusnigra) onthe growth and development
of
gypsy moth's larvae.
The results showed that duration of larval development was the longest
onPinusnigra(77,1±5,46) days and the shortest on Malussp(37,5±4,96) days,for larval
growth in length and weight larvae had gained the higher length and weight on Malussp in
the order (62±1,9)m.m (2136±9,62) mg. on the other hand the lower length and weight
were on Pinusnigra in the order (38±2,44)m.m (545±7,91) m.g. mortality percent of larvae
was least on Malussp.and highest on Pinusnigra.
Finally, pupae had the best weight with shortest development duration on the
Malussp, while the least weight and longest development duration were on the Pinusnigra.
There were proportional indirect of larval percentage mortality on relation to plant host, it
was highest on lower preference plant.
