Methods for reducing sexual maturity in farmed sturgeon
ayoub
yousefi jourdehi
International Sturgeon Research Institute, Agriculture research Education and Extension Organization (AREEO), Rasht, Iran
author
mahmoud
bahmani
International Sturgeon Research Institute, Agriculture research Education and Extension Organization (AREEO), Rasht, Iran
author
ali
hallajian
International Sturgeon Research Institute, Agriculture research Education and Extension Organization (AREEO), Rasht, Iran
author
Mohmmad
Pourdeghani
International Sturgeon
Research Organization of the Caspian Sea
author
Rezvan
Kazemi
International Sturgeon Research Institute, Agriculture research Education and Extension Organization (AREEO), Rasht, Iran
author
Mahtab
Yarmohammadi
International Sturgeon
Research Organization of the Caspian Sea
author
Maryam
Monsef
International Sturgeon Research Institute, Agriculture research Education and Extension Organization (AREEO), Rasht, Iran
author
Amin
Farahbod Roudbarki
International Sturgeon Research Institute, Agriculture research Education and Extension Organization (AREEO), Rasht, Iran
author
text
article
2018
per
Considering longing term oocyte maturation in sturgeon; therefore, several managements, nutritional strategies and endocrine manipulation of the reproductive system are used to induce sexual maturity. Several studies have been carried out regarding to the reduction of sturgeon sexual maturity under culture conditions in terms of environmental, physiological and nutritional in inside and outside of Iran in recent years. Some of them could be the use of heating systems, using water holes and rivers at the same time, the addition of organic and inorganic minerals and supplements in diet, the use of vitamins C and E in fish diets, using food sources containing unsaturated fatty acids and essential amino acids, using of soybean meal in diets female, hybrid, use of hormones estradiol in the diet, the use of phytoestrogens (plant like - hormones) in the diet sturgeon and so on. According to analysis conducted to compare and analyzing the results of the studies, using environmental management and nutritional strategies and simultaneously using some additives in diet to accelerate growth promoting reproductive and sexual maturity in various species farmed sturgeon is suggested.
Sturgeon Extention Journal
1
v.
1
no.
2018
1
22
https://sej.areeo.ac.ir/article_118730_c2ace26f426ea2a42b8bae365ab49ffd.pdf
Using of possible methods for sexing in farmed sturgeon
Ali
Hallajian
International Sturgeon
Research Organization of the Caspian Sea
author
Rezvan
Kazemi
International Sturgeon
Research Organization of the Caspian Sea
author
Ayoub
Yousefi
International Sturgeon
Research Organization of the Caspian Sea
author
Mahmoud
Mohseni
Fish Nutrient Expert
author
Mahtab
Yarmohammadi
International Sturgeon
Research Organization of the Caspian Sea
author
Amin
Farahbod Roudbarki
International Sturgeon
Research Organization of the Caspian Sea
author
text
article
2018
per
Sexual maturation times are various in different fish species longed from several months to years depend on genus and species. Sturgeon matured later than other bony fishes and sexing is impossible at lower age morphologically. Using different techniques for sexing in sturgeon is necessary, because this will prevent financial losses for breeders due to the lack of sex recognition for the cost of several years of male and farm breeding. Therefore, using of different methods such as surgery (biopsy), laparoscopy, ultrasonograpgy and hormonal tests are necessary. Based on results of different studies on sturgeon, endoscopy methods are less invasive and low stress in fish and are suitable for sexing fish at age upper than 2 – 3 years. But surgery based on biopsy is more accurate and suitable method for sexing fish at higher sexual maturity stages.
Sturgeon Extention Journal
1
v.
1
no.
2018
23
31
https://sej.areeo.ac.ir/article_118731_897f9cae8b1e44fcef96519d775b2383.pdf
Sturgeon Farming Development in Iran
hossein ali
abdolhey
Faculty member of Iranian Fisheries Research Institute, Deputy of Aquaculture development in Iranian Fisheries Organization,
author
naser
karami rad
Director General of the Office for the Recovery and Conservation of Aquatic Genetic Resources
author
text
article
2018
per
Sturgeon is one of the most valuable fish in the word and is in fact one of the most valuable living things human beings have ever hunted. The high value of these fish has caused the endless fishing of their generations with endangered species in addition, various contaminations in the sea and rivers have been exacerbated. Although sturgeon production is aimed at dumping and restoration of natural resources in our country more than forty years old, but the sturgeon production has been started in our country for about two decades, producing meat and caviar, and along with the expanding global development This will contribute to the rebuilding of reserves, in addition to generating protein and value for the country, because of the reduction in the pressure on natural resources. The existence of a suitable climate for the rearing of these fish, low installation costs and human resources compared to European countries, the high technical knowledge and experience, as well as the reputation of our country as the producer of the best caviar in the world, has had a tremendous economic value and quickly develop. In this research, the status of development of sturgeon breeding has been attempted by the Iranian Fisheries Organization. Currently, more than 116 active farms in more than 21 provinces of the country with a production capacity of 6332 tons of meat and more than 95 tons of caviar are in operation, so that in 2017, a total of 2514 tons of meat and 3508 kg of caviar on farms produced and extracted.
Sturgeon Extention Journal
1
v.
1
no.
2018
32
44
https://sej.areeo.ac.ir/article_118732_b264f4b669b84b7cdf4c5da4a091cd10.pdf
Using Garlic (Allium sativum) hydroalcoholic extract to eliminate the protozoan ectoparasite (Trichodina) in Persian sturgeon fingerlings
Soheil
Bazari Moghaddam
International Sturgeon Research Institute- Rasht- Iran
author
Mehdi
Masoumzadeh
International Sturgeon Research Institute- Rasht- Iran
author
Jalil
Jalil pour
International Sturgeon Research Institute- Rasht- Iran
author
Mehdi
Alizadeh
International Sturgeon research Institute- Rasht- Iran
author
text
article
2018
per
Sturgeon Extention Journal
1
v.
1
no.
2018
45
55
https://sej.areeo.ac.ir/article_118733_d082d494cfe466b8b1c330867858752f.pdf
Using of supplemental lysine, alanine and methionine on growth performance and survival rates in Persian sturgeon (Acipenser persicus) fingerlings
Hamidreza
Pourali
Aquaculture Expert
author
mahmoud
Bahmani
Fish Physiology Expert
author
Mahmoud
Mohseni
Fish Nutrient Expert
author
Ali
Hosseinpour
Aquaculture Expert
author
Alireza
Alipour
Aquaculture Expert
author
text
article
2018
per
A study was conducted to evaluate the effects of dietary supplementation of Methionine, Lysine and Alanine on growth performance, Feed Conversion Ratio (FCR) and survival rates in Persian sturgeon (Acipenser persicus) fingerlings reared under weaning period in Iran for fifty days. Experimental fish were fed ten practical diets supplemented with 0 (as a control diet), 1,2 and 3 % of Methionine, Lysine and Alanine in a design experiment. The experimental groups were fed in triplicate. A total of 3300 A.persicus larvae with an average weight of 0.4 ± 0.09 g (mean ± SD) and an average total length of 3.8 ± 0.29 (mean ± SD) cm were randomly allocated to thirty 50-L aerated tanks (110 fish in each tank) with flow rate of about 0.2 l/min. The results show that when growth of Persian sturgeon juveniles increases, they will need more methionine. The results indicated that there were significant differences in growth performance of all methionine level, the 2 and 3 level of Lysine and Alanine groups. Maximum weight gain (5.9± 1.2 g), special growth rate (5.4± 0.4%) occurred at 3% dietary Alanine. But the survival rates were not significantly affected by dietary amino acids levels and the control groups. Therefore, in order to adaptation of Persian sturgeon larvae, it is suggested to apply at least one, two and three percent of methionine, lysine and alanine in larval diet, respectively.
Sturgeon Extention Journal
1
v.
1
no.
2018
56
71
https://sej.areeo.ac.ir/article_118734_9f59d6a3c685405fdecc37efedc3ff40.pdf
Standard of some critical parameters of inlet and outlet water in different densities of beluga (Huso huso)
Zabih ollah
Pajand
Director of Sturgeon Station of Gilan
author
text
article
2018
per
Decomposition of solids increases ammonia, nitrite, nitrate and phosphate parameters in aquaculture system and decreases dissolved oxygen and the quality of circulating water. Sustainable aquaculture with estimates of the amount of nutrients in culture system of fish can be provided to its purification. In this study, beluga fingerlings were introduced into 12 tanks with 80-liter water. During 55 days of the experiment, sturgeon was fed with 2% body weight at 4 times per day. 3 treatments containing densities of 2-3, 3-4 and 4-5 kg/m2 were considered. Ammonia, phosphate, nitrite and nitrate parameters were not significantly different in densities of 2-3 and 3-4 kg/m2, and this difference was revealed in the density of 4-5 kg/m2 compared with lower densities. In this study, we can conclude that with a density of 3-4 kg/m2 beluga fingerlings for the critical parameters of the outlet water will be appropriate for reuse of water with its physical and biological purification.
Sturgeon Extention Journal
1
v.
1
no.
2018
93
105
https://sej.areeo.ac.ir/article_118735_b78eafd1c0d1adfda0e2530e2130e191.pdf