BREEDING AND AQUACULTURE SCIENCES QUARTERLY
Year:2013 | Volume:1 | Issue:3|Papers Count:8

Effect of dietary mannan oligosaccharide and b-1, 3 glucan on growth, survival and body composition of Kutum fry were investigated for 45 days. Basal diet were supplemented with (control), 0.5 and 1.0 g prebiotic per kg commercial diet (containing 35% protein and 12% lipid) in a totally randomized design trial in triplicate groups. The experiment carried out in 40 liters plastic tanks. 20 juveniles Kutum with initially average weight 646.7±13.3 mg were stocked in tanks and fed up a day. The fish fed diet without prebiotic had better performance than other experimental diets and showed significant differences in feed conversation ratio, feed intake, protein efficiency ratio, body mass gain, feed efficiency, lipoid efficiency ratio, lipid product value, lipid gain, survival rate and price index (P<0.05). There were no significant differences in body composition and the protein and lipid contents in the whole body increased with increasing rates of prebiotic. These results suggested that this prebiotic did not influence the growth performance in Kutum fry, and it is not appropriate for supplementation in the diet of cultured fry kutum.

The present research was carried out in International Sturgeon Research Institute in eight weeks, in order to invest the effect of different concentrate diets of Skretting Franc and living food (gamarus and chironomus) on growth factors and esterlet juvenile nourishment. The number of go esterlet juvenile with average weight of 8.23±0.21 were transported to six 160 L aquariums with three replications. During the experiment, the juveniles were fed by 2 percent of body weight and one time daily. At the end of the cultural period, statistically, in all parameters, There was significant difference (p<0.05). Final weight, final length, fat factor, final, biomass, proudoction rate, the amount of gain rate (GR), special growth (SGR), body weight index (BWI), percent body weight index, food Eficiency food (FE), protein efficiency ratio (PER) and survival hindrance in Skretting treatment were better than the living foor treatment. Also the FCR in Skretting treatment was lower than living food treatment, and statistically had significant difference (p<0.05). With regard to integrity in culture condition, it can be said that the variation of growth trend is the result of chemical composition quality, so the fish fed by Skretting formulated diet had better performance than living diet.

This study used a completely randomized design includes different levels of dietary oligofructose (1 and 2 percent) in 2 teatments and 3 replicats to evaluate the effects of oligofructose prebiotic on some growth and nutrition factors in Acipenser stellatus Juvenils. Fish with average initial weight 29±3gr were distributed in 10 density per each tank and fed for 76 days with experimental diets. The results showed the oligofructose had benefit effects on growth and nutritional factors And significant differences were seen in between treatments and control. Also the FCR of first treatment (1% dietary oligofructose) was lower than other treatment and control. Based on the results, usage of 1% dietary oligofructose in Acipenser stellatus have benefit effects on growth and nutrition performance and can be recommended.

According to the nutrient requirements of reared fishes and ornamental species, improvement of dietary quality has an important role on growth performance, preventing disease and reducing feed costs in aquaculture. The use of herbal additives as growth stimulators and safety indicators has been recently more considered because of fewer harmful effects on fish, and the environment compare to chemical additives. The aim of this study was to evaluate the effects of cinnamon powder regard to its antioxidant activity in the diet of green terror Andinoacara rivulatus on survival rate and hematological parameters. One hundred eighty green terror fries (with initial weight of 1.00±0.5 g and initial total length of 38.00±1.03 mm) divided into five treatments (each treatment with three replicates). Experimental treatments were fed with four diets in concentration of 0.1, 0.2, 0.3 and 1 percent of the cinnamon powder in comparison with diet control (free from cinnamon powder) for 98 days. Evaluating the effect survival (S), Red blood (RBC), hematocrit, hemoglobin, white blood cell (WBC) and the blood-glucose level of each treatment. There was statistically significant difference between fish were fed with one percent of ground cinnamon and control group in WBC, and blood-glucose level. According to the obtained findings in this study, it is concluded that adding ground cinnamon in concentration of one percent to the diet of green terror Andinoacara rivulatus improves WBC and and the blood-glucose level.

In order to evaluate the effect of stocking density on growth and survival of fish larvae Angel, larval fish densities of 10, 20, 30 and 40 larvae were stored in l. Experiments in a rectangular glass aquarium with a volume of 30 liters, any aquarium was filled with 20 liters of water and oxygen and pH conditions for the larvae were provided. Longitudinal growth of larvae was measured in 10-day intervals after the larval survival was measured 20 days. Data analysis using one-way analysis of variance (One-Way ANOVA) using software packages of Spss Exel was performed and the presence or absence of a significant difference in the level of 5% (p<0.05) was determined. The results showed that the survival of larvae reared from larvae at low densities. (10 and 20 larvae per liter) than larval survival at higher densities (30 and 40 larvae per liter) and were significantly different (p<0.05). Although the concentrations of 10 and 20, respectively, with percent survival 61.3±5.34 and 89.1±75.28 and also between the densities of 30 and 40, respectively, with a viability of 89.2±16.21 and 75.4±62.19 there was no significant difference (p>0.05). The highest average density of larvae after 20 days was 10 and 20 larvae per liter (respectively 1.0±7.6 and 06.0±63.6), which have significantly different densities of 30 and 40 larvae per liter (respectively 1.0±6.6 and 06.0±47.6) was (p<0.05).

Ornamental freshwater fish are found in several parts of the world. And tapping the aquarium industry and education are proliferating. Among the many and varied sources of live food, Artemia in aquaculture is important. Because of this, high nutritional value, high digestibility Variation in size, easy production method and salinity tolerance in these animals varied. In this regard, the effects of n-3HUFA and vitamin C-enriched Artemia urmiana nauplii on growth, reproductive performance of swordtail (Xiphophorus helleri). Thus, treatment of fish fed with enriched live feed. Research during the live adult Artemia enriched with fish oil and 5.0 g ascorbic acid treatment in triplicate, Average initial weight of 9.32 and the final weight of 2448 gr with an average survival of larvae from 5.93%, the highest efficiency compared with other treatments.. Maximum number of offspring per generation, the fish fed with concentrate feed 116 infants were living with adult Artemia, Most of the initial weight of the infants were fed with adult Artemia treatment showed no significant difference. The highest sex ratio of offspring of fish fed with concentrate feed is live adult Artemia It is very important that these fish.

Fish hematology is one of the most important evidence of physiological characteristics and reflecting their water ecosystem and their health, so having a normal range of blood parameters in fish can be used as a biological indicator. 90 beluga with average weight of 1.15±20.82 Kg were kept on Shahid Rajai reproduction, culture and rehabilitation of sturgeon for 60 days. Fish were fed with diets containing garlic (garlic powder 10 g per dg diet) for 60 days. After anesthetized the fish with clove sampling the fish done from vein tail and behind the anal fin. Immediately after blood sampling using 2 cc syringes, the blood was shed in the he parinized microtube and hematology tests were performed in the laboratory. The results of this study showed that, total hemoglobin and red blood cells in the course of treatment was higher than control but in hemoglobin concentration between the two treatments did not show a significant difference from control and garlic (p>0.05). Hematocrit percent and white blood cell count was significantly different between garlic and control group (p<0.05), so the rate of garlic higher than the control group. The results of the RBC indices MCV, mean corpuscular hemoglobin and mean corpuscula hemoglobin concentration did not show difference between the garlic and control groups (p>0.05). Finding from this study suggests that, Add10 g garlic extract per kg food is suitable level for improving cellular immunity of beluga.

The effects of orally administered ginger, garlic and nettle on growth parameters of 360 juvenile Huso huso was evaluated for 2 month. The basal diet was supplemented with 1% garlic, 1% ginger and 1% nettle. Biometry of fish was done each 15 day. SGR, CF, BWI% and DGR% showed significant increase in ginger group 15 days after feeding in comparison with control (P<0.05). We observed no difference in growth parameters 30 days after feeding among treatments and control group. BWI% increased significantly in ginger group in comparison with control (P<0.05) 45 days after feeding. BWI% and CF decreased significantly in garlic group in comparison with control 45 days after feeding (P<0.05).