نرماتیوهای تکثیر مصنوعی ماهی چالباش (Acipenser gueldenstaedti Brandt، 1833)

بکارگیری دافنی ماگنا (Dahnia magna) و ناپلی آرتمیا در تغذیه آغازین لارو ماهی چالباش Acipenser guldenstaedtii Brandt and Ratzeburg, 1833

آزمایش تغذیه ای 28 روزه با لارو ماهی چالباش در شروع تغذیه فعال، با استفاده از 3 غذای زنده شامل دافنی ماگنا، آرتمیا اورمیانا و مخلوط آنها (50 درصد وزنی دافنی و 50 درصد وزنی آرتمیا) طی 6 بار تغذیه در روز انجام شد. لاروهای سالم ماهی چالباش از مرکز ماهیان خاویاری مرجانی تهیه شدند. لاروهای ماهی در سه تیمار (D ،A و D+A) با 3 تکرار (100 ماهی در هر حوضچه) برنامه ریزی شده، بر پایه 30 درصد وزن بدن در روز...

مطالعه رابطه بین فاکتورهای خونی و کیفیت مولدین تاس ماهی روس (Acipenser gueldenstaedti) جهت تکثیر مصنوعی

Evolutionary relations and population differentiation of Acipenser gueldenstaedtii Brandt, Acipenser persicus Borodin, and Acipenser baerii Brandt

Russian ( Acipenser gueldenstaedtii), Persian ( A. persicus) and Siberian ( A. baerii) sturgeons are closely related 'Ponto-Caspian' species. Investigation of their population structure is an important problem, the solution of which determines measures for conservation of these species. According to previous studies, 'baerii-like' mitotypes were found in the Caspian Sea among 35% of Russian stu...

Initial salinity tolerance and ion-osmotic parameters in juvenile Russian Sturgeon, Acipenser gueldenstaedtii, Brandt, 1833

  The salinity tolerance, hematological and hydromineral regulation capabilities of juvenile Russian sturgeon (Acipenser gueldenstaedtii) were investigated in different ages and sizes in freshwater (FW: 0.05) but differed in experimental media (p < 0.05). Signifi cant differences were observed between the levels of plasma ion concentrations in different media (p < 0.01). Plasma Na+, K+ and Ca+2...

Initial salinity tolerance and ion-osmotic parameters in juvenile Russian Sturgeon, Acipenser gueldenstaedtii, Brandt, 1833

  The salinity tolerance, hematological and hydromineral regulation capabilities of juvenile Russian sturgeon (Acipenser gueldenstaedtii) were investigated in different ages and sizes in freshwater (FW: <0.5‰), estuary water (EW: 9.5‰) and Caspian Sea water (CSW: 12.5‰). The fish were directly transferred from FW to EW and CSW. The possible repercussions of ion-osmoregulatory processes on some ...

Evolutionary relations and population differentiation of Brandt , Borodin , Acipenser gueldenstaedtii

Russian ( ), Persian ( ) and Siberian ( Acipenser gueldenstaedtii A. persicus A. ) sturgeons are closely related ‘Ponto-Caspian’ species. Investigation of baerii their population structure is an important problem, the solution of which determines measures for conservation of these species. According to previous studies, ‘baerii-like’ mitochondrial genotypes were found in the Caspian Sea among 3...