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Showing 7 results for Persian Sturgeon
B. Fadaee , B. Younes Haghighi ,
Volume 20, Issue 3 (10-2011)
Abstract
To study moving direction and survival index of Persian sturgeon fingerlings, a total of 390200 individuals of the fish in three weight classes: less than 3g, 3 to 5g and 6 to10g were marked by coded wire tags (CWT) during 2003 to 2008. In 2003, 101500 of these individuals were marked in Shahid Beheshti, Shahid Rajaee and Shahid Marjani Sturgeon Rearing Centers, in north of Iran and then released in Sephidrud, Tajan and Gorganrud rivers. During 2004 to 2008, 288700 pieces were marked by Shahid Beheshti Rearing Centers and released in Sephidrud River. Catch and detection of fingerlings carried out by gill net prepared from nylon with mesh sizes 22, 26, 33 (2 filaments for each mesh) and one 40mm mesh size. Totally, 175 meters of net was used to study fishes in waters under 10m depth in Guilan province. In all, 2827 pieces of this fish were caught of which 40 had CWT and these belonged to weight classes 6-10g (22 pieces), 3-5g (17 pieces) and under 3g (one piece). Results on release and catch of the fingerlings for Sephirud River showed that more than 70% of fingerlings moved to eastern parts of the estuary and eastern coasts of Guilan province (stations like 12 Bahman, Dastak and Chaboksar). Of the fingerlings released in Gorganrud and Tajan rivers, only one piece was caught in Chaboksar and another in Lisar after 15 months. Hence, we postulated that the fingerlings released in Mazandaran and Golestan provices migrated to Guilan province coasts. Statistical analysis of the survival index in different weight classes indicated that the class 6-10g had higher survival rate, twice than class 3-5g and 20 times more than that of the class under 3g. Considering these results, probably the higher weight at release time can be effective in increasing the survival rate of the Persian sturgeon fingerlings. *Corresponding author
S. Mosafer Khoorjestan , S. Khodabandeh , Z. Khoshnood ,
Volume 21, Issue 4 (1-2013)
Abstract
To study the effects of mercuric chloride on kidney and intestine tissue of Persian Sturgeon, Acipenser persicus fry, fish exposed freshwater contain 15 ppb of mercuric chloride and control group were kept in non polluted freshwater for 48 hours. Histological studies of the processed tissues showed marked histological alterations than the control group that exposed only to freshwater. The pathologic lesions of the kidney included severely epithelial cell necrosis, lesion of epithelial cells from the basement membrane in the proximal and distal tubules. Proximal tubule also showed inflammation and incorporation of brush borders. Decrease of lymphoid and hematopoietic tissue observed. Pathologic lesions of intestine tissue were showed the epithelial necrosis, shrinkages of secretory follicule, lesion of epithelial microvilli in intestine. Results showed that low concentration of mercuric chloride can pose undesirable alternation in Persian Sturgeon fry, an economic and endangered species of the Caspian Sea.
F. Khani , M.r. Imanpoor , H. Kolangi Miandare , A. Ghaedi , V. Taghizadeh ,
Volume 24, Issue 3 (10-2015)
Abstract
This study was aimed to examine the impact of different levels of dietary nucleotides (Vannagen) on serum
biochemical and blood parameters of Persian sturgeon (Acipenser persicus). Fish (42.37± 2.12 g and 23.67±
0.61 cm) were divided into four treatments with different levels of dietary nucleotides (0, 0.25, 0.35 and 0.5
percent of diet). There were three replicates with a density of 12 fish per tank. After 10 weeks of feeding,
serum biochemical and blood parameters were measured. Among the measured factors, blood glucose,
triglycerides, cholesterol, erythrocyte and heterophil showed significant differences between the groups fed
with nucleotides and the control group (P ≤ 0.05). By increasing the nucleotide levels, the mean heterophil
and serum glucose showed significant increase and decrease, respectively. The highest and lowest values of
cholesterol and triglyceride were found in groups fed with 0.25% and 0.35% nucleotides, respectively. The
other measured factors had no significant difference (P≤0.05). Therefore, it could be said that with regard to
the limited capacity of cells to synthesize nucleotides, external preparing of nucleotides could result in the
production of needed nucleotides and an increase of its production speed, especially during stress. Such
preparation can also improve fish physiology and health status.
F. Khodabandeh, K. Sarvi Moghanlou, S. Khodabandeh,
Volume 27, Issue 1 (5-2018)
Abstract
In the present study, the effects of enrichment of Artemia franciscana with fish oil and soybean oil accompanied with vitamin E were investigated on the structure of pyloric caeca in Persian sturgeon (Acipenser persicus) larvae. A total of 1500 Persian sturgeon larvae (with the average weight of 51±2 mg) were divided into 15 tanks. Larvae were fed for 17 days in 5 experimental treatments including the treatment C (non-enriched artemia), S15 (enriched artemia with soybean oil and 15% vitamin E), S30 (enriched artemia with soybean oil and 30% vitamin E), F15 (enriched artemia with fish oil and 15% vitamin E) and F30 (enriched artemia with fish oil and 30% vitamin E). From each traetment, 15 larvae were collected and were fixed in Bouin’s solution for histological studies. Histological results showed that both fish oil and soybean oil were the main and effective factors on the total area and histo area indices of the pyloric caeca and the enrichment of artemia with fish oil and soybean oil was significantly increased this factor as compared to that of the control treatment (P<0.05). Fish oil was approximately two times more effective than soybean oil on the total area index of of the pyloric caeca. Furthermore, vitamin E was the main factor that affected the enterocyte numbers of the pyloric caeca. Increasing the amount of vitamin E was significantly decreased the number of enterocytes as compared to that of the control group (P<0.05). In conclusion, the enrichment of artemia with fish oil and with the appropriate amounts of vitamine E could have positive effects on the enterocytes of pyloric caeca and could improve ion regulation in the Persian sturgeon larvae.
M. Shakouri, H. Oraji, A. Karamat Amirkolahi, H. Abdolhay,
Volume 27, Issue 4 (10-2018)
Abstract
Olfactory imprinting is one of the affordable approaches for improving neonatal feeding in husbandry. In order to evaluate the possibility of olfactory imprinting in the Persian sturgeon larvae and to evaluate its future application in the feeding of larvae, two groups of early fertilized eggs were exposed to the stimuli solution (phenyl ethyl alcohol (0.0001 mol/L) and the fish feed extract (0.01 g/L) until 29 days after hatching. The third group (control) exposed to neither stimuli solution nor the fish feed extract. Fish larvae behavior was examined in Y-maze at days 11 and 25 posthatch in order to evaluate the larvae preference/avoidance reactions to the stimuli solution and the fish feed extract. The results indicated that the exposed Persian sturgeon larvae did not show any preference/avoidance reaction at day 11 posthatch to the pertinent stimuli, whereas the exposed Persian sturgeon larvae preference was for the stimuli solution rather than the fish feed extract at day 25 posthatch (P<0.05). The preference of larvae of the control group was for the fish feed extract rather than the stimuli solution at day 25 posthatch, whereas the exposed Persian sturgeon larvae preference was for the stimuli solution rather than the fish feed extract at day 25 posthatch. The average time of the larvae presence (value for reaction) in the arm containing the pertinent stimuli was significantly higher than the average time of the larvae presence in the arm containing the fish feed extract (P<0.05). The result indicated that continues exposure of egg and larvae of the Persian sturgeon to the phenyl ethyl alcohol (0.0001 mol/L) and the fish feed extract (0.01 g/L) could change olfactory preference of the larvae at day 25 post hatch.
F. Darafsh, M. Soltani, H.a. Abdolhay, M. Shamsaei Mehrejan,
Volume 28, Issue 3 (9-2019)
Abstract
To determine the effect of D-Pro probiotics (Bacillus licheniformis, Bacillus subtilis) and Saccharomyces cerevisiae in Persian sturgeon’s diet on the growth indices and biochemical analysis of the carcass, a total of 2400 Persian sturgeon species were randomly selected, with a mean weight of 4.00±0.10 g (mean ± standard error) and a mean length of 9.91±0.35 cm (mean ± standard error), and were assigned to four treatment groups, each of which was carried out with three replications. The present study was conducted within 60 days in Dr. Beheshti Center of Proliferation and Restoration of Persian Sturgeon (Guilan province). The treatments were 1) 5 g/1 kg of D-Pro, 2) 5g/1kg of Saccharomyces cerevisiae, 3) a mixture of 5 g/1kg of D-Pro and 5 g/1kg of Saccharomyces cerevisiae, and 4) a control group )a basic diet without any probiotics and yeasts(. Results of the analyses showed that the highest mean weight was obtained in the D-Pro treatment. The D-Pro treatment had the highest increase in length and the lowest feed conversion ratio which were significantly different compared to other treatments (P<0.05). Using D-Pro in their diet led to a carcass fat increase and this increase was statistically significant (P<0.05). By adding D-Pro to their diet, the carcass moisture decreased and this decrease resulted in a significant difference in the carcass moisture content compared to the control group (P<0.05). The levels of whole carcass ash were not significantly different in the D-Pro and Saccharomyces cerevisiae treatments compared to the control group (P>0.05). However, differences in the levels of whole carcass ash were observed between the D-Pro and Saccharomyces cerevisiae treatments, such that the levels of ash significantly increased compared to the D-Pro treatment (P<0.05). The oral consumption of 5g of D-Pro probiotic in the Persian sturgeon’s diet increased growth and growth indices and is recommended to be used in the aquaculture industry.
Bahram Falahatkar, Shapour Gholami, Eshahgh Rasouli Kargar, Iraj Efatpanah,
Volume 31, Issue 6 (3-2023)
Abstract
The present study aimed to investigate the effect of different feeding rates in summer condition (higher than 25ºC) on the growth and feed intake of juvenile Persian sturgeon (Acipenser persicus). For this purpose, four feeding rates including 1, 1.5, and 2% of body weight, and also based on appetite until satiety were considered in three replicates. A total of 20 juveniles with an average weight of 19.3±0.1 g were distributed in each concrete tank with a volume of 800 L and fed daily at 5, 11, 17, and 23 for 60 days. After 60 days, the results showed that in most of the measured parameters including final weight, final length, weight gain, body weight increase, and specific growth rate, the highest values were observed in the fish fed to satiation. Moreover, the amount of voluntary feed intake (as %/day) was observed in the satiety level and the lowest feed conversion ratio was measured in the fish fed with 1.5% feeding rate. There was no significant difference in condition factor among treatments. Based on the voluntary feed intake, the results showed that fish in this condition need 2.4% of feeding rate per day. This study showed that it is possible to easily culture and feed juvenile Persian sturgeon in summer condition at high temperatures without any problem and to achieve the highest growth and feed efficiency, the feeding level of 2.4% of body weight per day is recommended in the present experimental conditions.
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