فصلنامه آبزیان و شیلات
پیاپی 16 (زمستان 1392)

The most expensive component in aquaculture feed is implemented. Find ingredients and affordable alternative to help the high level of aquaculture development. In this study, the yeast cell wall of Saccharomyces cerevisia added prebiotic dietary with different levels of Indicators of growth and survival of rainbow trout fry were used . In the study, 120 rainbow trout fry with the average weight of 3.61± 0.12 gr for 8 weeks containing 100 liters volume fiberglass tub were randomly distributed into 12 tanks and were reared. An experiment to determine the optimum level of prebiotic effect of dietary yeast cell wall in the diet of rainbow trout fry in 1% prebiotic treatments, 1.5% prebiotic, 2% prebiotic prebiotic-free control, in a balanced design with three replications each were studied. The results of this study revealed that the growth parameters such as body weight initial (BWI), feed conversion ratio (FCR), specific growth rate (SGR) and average daily growth (ADG) in treatment 2% prebiotic influenced and show significant differences with the control group and other treatments (P<0.05). Other factors growth such as final weight and length of fish was not difference statistically significant(P>0.05). The difference in survival rates and condition factor (ponderal index) and the various treatments was not significant(P>0.05). Based on these results it can be stated that the yeast cell wall of Saccharomyces cerevisia prebiotic growth of rainbow trout fry is better.

In this research, fecundity and Determination food rate in I n d o m y s i s n y b i n i (Opossum shrimp) was studied in Indian White Shrimp brood stock ponds of Kollahi port in Hormuzgan province, Iran. Food determination experiment was performed with 4 treatments, T1=5, T2=10, T3=15 and T4=20 Artemia napliuse per mysids. For determination of fecundity, the marsupiums female mysids were analyzed and the juveniles in their marsupium were counted under the loop. Food Determination experiment showed the mysids consumed between 5-9.75 ± 2.2 Artemia naupliuse for 24 hours. The fecundity results showed that the average of larvae was 6.21 ± 2.98 per female. Indomysis nybini mysid was the first mysid species that identified in Hormuzgan and had the total length between 5.5 and 8.2 mm with her fecundity of 2-23 juveniles. The results showed that size of female mysid in this species doesn't have any effect on the numbers of juveniles in marsupum.

In order to determine the effect of age on some blood cell and biochemical parameters of common carp in cooperative reproduction season 89-90 in cooperative reproduction center 12 (Rasht) from 40 common carp in four age groups under 1 year old,1,2 and 3 years old (each group 10 specimen) blood sampling were occurred. Analysis results showed that the most of red blood ,white blood, hemoglobin, mean corpuscular hemoglobin, corpuscular hemoglobin concentration, glucose and Triglycerid observed in 2 years old, The most of cholesterol and hematocrit in 1 year and most amount of protein and calcium was seen in 3 years old and The least amount all of factors observed in under 1 year. Also most and least amount of mean corpuscular was observed in 1 year old and under 1 year old respectively whereas the most and least amount of phosphorus was seen in under 1 year and 3 years old. All factors in different ages have a statistically significant difference (P<0.05). A cording to results of this study and other surveys on influence cell and ionic factors on age, species… from these results can be used for management of culture of this economic species.

This survey carried out in 2011, the aim was surveying water quality of the above fish punds in Khozestan conditions. Water samples from Labeo rohita ponds, 1700 m2 each was examind, and temperature, pH, NO3, NO2, D.O, with the standard methods was majored. The collected data with the help of kolmogorov-smirnov test and variance analyize one way (ANOVA) was tested. The average of water temp in spring, summer, fall and winter was 25.47±1.07, 29.88±1.42, 20.23±0.69, 14.63±0.47 Degree centigrade respectively (P<0.001). The average of pH in spring, summer, fall and winter was 8.51± 0.027, 8.54±0.025, 8.45±0.028, 8.11±0.017 respectively (P<0.001). The average of NO3 in spring, summer, fall and winter was 4.69±0.4, 7.11±0.5, 6.03±0.1 and 6.12±0.9 mg/L (P<0.001). The average of NO2 in spring, summer, fall and winter was 0.312±0.007, 0.083±0.005, 0.473±0.008 and 0.154±0.007 mg/L (P<0.001). The average of DO in spring, summer, fall and winter was 9.21±0.77, 8.36±0.51, 10.41±0.9 and 13.14±0.72 mg/L (P<0.001).

Rainbow trout was a kind of fish which formed the basis of developing industry. This Study was very important in aquaculture industry there were 120 fry of rainbow trout with on average weight 3 gr at 8 weeks in 12 tank fiberglass with a density of 10 fish. They were determined the effect of different levels of vitamin D3 in Blood factor and immune system in 3 dietary treatments with 3 replicates and 1 control group did at concentrations of 3000, 4000 and 5000 International Units of vitamin D3. The study showed that the increasing amounts of the vitamin D3 in the diet of fish caused to increase plasma levels of vitamin D and increased levels of white blood cells and immunoglobulins. They Showed the increase of immune system and other factors blood such as : Hemoglobin , hematocrit , neutrophils , lymphocytes , monocytes , eosinophils, MCV, MCH, MCHC did not influence differences statistically significant(p>0.05)

This survey was conducted in winter 2010, aimed to determine the degree of heavy metal accumulation in soft tissue of sea urchin, and determining this tissue as the most suitable bioindicator for lead and cadmium in the environment of the sampling stations. The way of doing this assessment was MOOPAM. Samples were prepared and classified according to sea urchin organ and then lead and cadmium were measured in them. Result of this study shows that soft tissue is a good index for lead and cadmium pollution. The result of bioaccumulation of lead and cadmium in the Soft tissue was 21.4 ±4.5 and 8.6 ± 1.7 mgKg-1. The results showed that in the stations was not significantly different between Heavy metal pollution in soft tissue of sea urchin.

This study aimed to identify the species of sea cucumbers in 2011-2012 in the warm season (July) and cold (February) with SCUBA diving operations around the island was Hendurabi. After transferring the samples to the laboratory, identified by spicules extracted and identified using was valid, and that the two families Holothuriidae Stichopodidae, two species of the genus Holothuria and Stichopus 4 species H o l o t h u r i a h ill a , H o l o t h u r i a l e u c o s p il o t a , H o l o t h u r i a
impatiens and Stichopus hermanni were identified. The results showed that the highest density of H. Leucospilota was. Shannon diversity index of 0.75 and the Biodiversity Indicators 0.54 was calculated. All species examined in this study have a little congestion and therefore has a lower diversity index. The only species of sea cucumber H. herrmani density is higher. The only species of sea cucumber H. leucospilota density and abundance in the study area has a higher ; So, it looks like this is the dominant species on the island, followed by a higher density of species Stichopus hermanni .

Necessity prevention of disease distribution as well as appropriate cure with low cost and side effects are very important. Among them, treatment with herbal medicine which has antibacterial and antifungal properties could be used as reliable method. For this aim, this study was carried out in Dr Keyvan fisheries sciences and marine technologies center which belonged to Lahijan Islamic Azad University, in order to assess effect of anti-bacterial and anti-fungal properties of Eucalyptus globulus labill extract on the skin and gill of common carp fingerlings ( cyprinus carpio ). In this experiment, short-term bath was used for controlling distribution of bacteria and fungus on the surface of skin and gill. The results revealed that, Eucalyptus globulus labill extract with concentration of 50, 100 and 150 mg/l in tiplicate with in 3weeks and 3 days consecutives which took long 30 minutes were tested. Among experimental treatments, colony forming unit (CFU) of fungus and bacteria had significant difference. But in concentration of 100 and 150 mg/l, extract had better efficiency for inhibition of fungus and bacteria pathogen in fingerlings
( cyprinus carpio )