An assessment the effect of Fructo-oligosaccharide on growth performance, survival and hematological factors in sturgeon juvenile (Acipenser sttellatus)

The purpose of this study was to evaluate the effect of Fructo-oligosaccharide (FOS) on growth and survival performances of sturgeon juvenile fish (Acipenser stellatus). 90 sturgeon fry fishes (average weight 30.16±0/14 gram) has been brought from Sturgeon International, Research Institute and stored in fiberglass tanks using randomize design with 3 treatments each with 3 replicates in relative constant physico-chemical water parameters(P>0.05) then fed with basal adaptive food for two weeks. Fry fed 11 weeks with diets containing 0% (Basal food), 1% and 2% oligofructose (Raftilose p95, Sigma Co.) added to the basal food. The results revealed that 1% pribiotic compare to other treatments caused increasing weight gain, specific growth rate, feed conversion, feed efficiency, protein efficiency ratio and liver indices significantly (p 0.05). At the end of experiment, after bleeding from sample fries, the hematological characters showed that there are no any differences between hemoglobin, WBC and RBC numbers, hematocrit, MCV, MCH and MCHC between treatments(P>0.05) although the number of WBC in 1% and numbers of neutrophils in 1 and 2% prebiotic had differences with zero% significantly (P< 0.05). Based on these results good influence on the improving growth and feeding performances by oligofroctose as prebiotic was proved in Acipenser stellatus fries and 1% level was the best

Study on rearing movine carps in the ponds of brackish water and freshwater

In this study, mono culture of Cyprinus carpio in fresh water and brackish water with 3500 specimens per hectare with 3 replication each carriedout from midel April to end the October 2010 and mide april to end the October 2011 recptively. Juline fish with 40 gr weight takeup from the sade voshmgir and after prepara tion of rearing ponds were introduced to pond according to appropriate and caluclate stocking density. Juline were fed by concentracted food(GFC). Feeding calculation based on percentage of body weight varied from 5 to 10 % of body weight. In fresh water Average weight and lenghth were in the stage time stocking 40 gr 14.68 cm and at the end of cultuivation period were 704.26 gr and 37.04 cm respectively. Inorder to comparecultivation of Cyprinus carpio in freshwater with breackish water another stocking 350 specimens per hactar with 3 replications also tookplace in this study. Junlin fish with average weight of 40gr and average length of 14.12cm were introduced to the ponds. At the end of rearing period average final weight was 700.26 with average length of 38.86cm.mean daily growth in fresh water treatment was 3.39. in brackish water replication the average daily . average condition factor in fresh water was 2.41. The average value CF in breackishwater was 1.39. in this research was survival rate in the fresh water and breackish water were more 77%

Study on biology (age, feeding and, reproductive) of (Cyprinus carpio, Linnaeus 1758) in south coastal line Caspian Sea (Iranian waters)

The Caspian Sea is the biggest lacustrine water source. Common carp is very important commercially in south coastal line of Iranian Caspian Sea waters, especially in east coastal line, because eighty percent annual catch of this species has been caught in this area in particular. Despite the common carp importance and value in Iran, but there is a little information about its biology in natural system. This study is comprehensive research on reproduction, growth and feeding. The specimens were caught by beach seine net in coastal line of Iranian waters. The fork length ranged between 5.6 and 2866.2 g. The b value of the length-weight relationship ranged from 2.843 to 2.924 for female and male, respectively. The age composition of the specimens was from 1 to 11 year. The Gonadosomatic ratio (GSR) changed from 2 to 12. There were two peaks of GSR in April and December, so that the latter peak was much shorter than the first that. Fecundity variations were high and ranged 77448 to 430745 eggs. It observed linear significant correlation in fecundity- weight (r=0.98) and fecundity-length (r=0.88) relationships. Average growth in length was described with the Von Bertalanffy growth model: L (t) = 60.5(1-exp (0.19(t-0.65). The percent of empty stomach and prey dominant evaluated during different seasons by specific formula result showed that in Cyprinus carpio prey Molluscs was dominated and specific food items. Empty stomachs in winter and spring were higher and lower, respectively

Anharmonic properties of TmTe

Data on elastic constants and associated properties at high temperature for TmTe crystal are presented and discussed starting from primary physical parameters viz. nearest neighbour distance and hardness parameter assuming long- and short-range potentials. When the values of the higher order elastic constants are known for a crystal, many of the anharmonic properties of the crystal can be treated within the limit of the continuum approximation in a quantitative manner. In this study, higher order elastic constants and related properties are computed upto 1000 K for TmTe. The first-order pressure derivatives of second- and third-order elastic constants, the second-order pressure derivatives of second-order elastic constants and partial contractions are also evaluated at different temperatures. The results thus obtained are compared with other available data and found in well agreement with present values