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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: International Aquatic Research
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: International Aquatic Research (IAR) launched in 2009 is a peer-reviewed international journal covering all aspects of aquatic science. The journal attracts articles that can improve the scientific knowledge in the various research topics related to aquaculture, fish nutrition, aquatic ecology, food science, aquatic food product technology, molecular biology as well as all the other topics related to aquatic science. IAR is an exciting journal, publishing original research articles, short communications, and review articles. The journal aims at publishing three issues containing about 20 to 25 articles per year.
This is the official journal of Islamic Azad University which provides all the funds to cover the cost of publications. There is no page charge for the articles published in IAR. The journal also publishes articles with colored figures and photographs free of charges. IAR is an open access journal which can be freely accessed by all readers.
It adopts a broad, multidisciplinary approach to the subject of aquatic and food science. It draws contributions in the form of major synoptic papers and syntheses or meta-analyses that lay out new approaches, re-examine existing findings, methods or theory, and discuss papers and commentaries from diverse areas of aquatic science. An article in IAR should draw upon all key elements of the existing literature on a topic, have a broad geographical scope, and provide general points which make it compelling to a wide public. Thus, we aim to serve as a focus for scientists, stakeholders and managers concerned with acquatic habitats and fisheries.- انتشار مقاله: 25-01-1399
- نویسندگان: Mohammad Reza Ghomi,Elena Tricarico,Sajid Maqsood,Hamid Reza Jamalzadeh
- مشاهده
- جایگاه : پژوهشی
- مجله: International Aquatic Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Beluga,gonad development,Steroid Hormones,Gonadic stage,brackish water
- چکیده:
- چکیده انگلیسی: The experiment was carried out in one year on blood sexual hormones in 74 four-years old beluga sturgeon Huso huso held in 8 round cement tanks in brackish water with salinity of about 13.5 ppt. Fishes were biopsied at the beginning of the experiment in order to determine the sexuality and gonadic stage. Blood sampling was performed in caudal veins three times during experiment in fall, winter and spring seasons.Testosterone (T), Esteradiol (E2) and Progesterone (P) were measured by Radio Immune Assay (RIA) method. Test of profile was done in duplicate. Statistical results showed a significant elevation (p < /em> > 0.05) on measured factors in both sexes, especially in males.In males, testosterone (T) depends on gonadic stage had significant elevation; but in females, there was no significant increase (p < /em> > 0.05) in estradiol (E2) and progesterone (P) which probably resulted from their ages. In males, T level in stages II, II-III, III, IV, were 5.5, 4.4, 6.3, 2.6 ng/ml, respectively.The result indicated that the amount of T increased by development of gonads until III stage, then suddenly decreased in stage IV. Quantities of P and E2 were measured only in females.Amounts of P and E2 in stages of II, II-III, were 0.12, 0.13 and 1.455, 0.81 ng/ml, respectively, suggesting the increase of P and decrease of E2 were associated with gonad progress. According to the results, it was demonstrated that sexual hormones were affected by season, environmental conditions and gonadal stages.Therefore, inland underground brackish water as a new medium culture was effective in reduction maturity time in beluga.
- انتشار مقاله: 26-08-1399
- نویسندگان: Morteza Alizadeh,Ali Akbar Hedayati,Mahmoud Bahmani,Hamid Reza Jamalzadeh
- مشاهده