محمود بهمنی
موسسه تحقیقات بین المللی تاسماهیان دریای خزر
[ 1 ] - فرمولاسیون نوین جیره های مختلف غذایی جهت تغذیه، تکثیر و پرورش کرم سفید (Enchytraeus albidus Henle, 1837)
در این تحقیق از جیره های غذایی مختلف جهت تغذیه و پرورش کرم سفید به عنوان غذای زنده بچه ماهیان خاویاری استفاده گردید چهار تیمار جیره غذایی شامل: جیره شاهد (آرد گندم، سبوس برنج و هویج)، جیره A (آرد گندم، سبوس برنج و سیب زمینی)، جیره B (آرد گندم، سبوس برنج، سیب زمینی و هویج) و جیرهC (آرد گندم، سبوس برنج و آزولا) طی یک دوره سه ماه مورد استفاده قرار گرفت. برای کاهش هزینه تولید کرم سفید از مخلوط آز...
[ 2 ] - Effects of dietary isoflavone-genistein on hematological and immunological parameters in pre - brood stock beluga, Huso huso
This study was carried out with the aim of detecting the dietary effects of isoflavone-genistein on hematological and immunological parameters in beluga, Huso huso in a 12-week feeding period. Five isonitrogenous (45% crude protein) and isoenergetic (19.5 MJ kg -1) diets were formulated to contain four graded levels of isoflavone-genistein, namely 0, 0.2, 0.4, 0.8 and 1.6 g kg-1 diet. Fish (ini...
[ 3 ] - Classification of sex and maturity stages of farmed Great sturgeon (Huso huso) using blood plasma steroid hormone and calcium ion levels
Twenty four farmed great sturgeon, Huso huso (including 8 males and 16 females) over 6 years old were used to develop a method for determination of sex and maturity stages. Seasonal gonadal tissue and blood samples were collected from farmed great sturgeon for three years. The sex and stages of maturity were determined by histology and laparoscopy at the beginning and end of experiment. Plasma ...
[ 5 ] - Growth performance, carcass composition, and immunophysiological indices in juvenile great sturgeon (Huso huso) fed on commercial prebiotic, Immunoster
Growth performance, carcass composition, and immunophysiological indices in juvenile great sturgeon (Huso huso) fed on commercial prebiotic Immunoster (IS) were investigated. After a four-week acclimatization period, 270 great sturgeon juveniles weighing 95.68 ± 10.05 g were randomly distributed into 9 fiberglass tanks in three replicates and kept at a density of 30 fish per tank for a period o...
[ 6 ] - Effects of supplemental dietary L-carnitine on growth and body composition of beluga (Huso huso) Juveniles
The effect of feed supplemented with L-camitine at four levels of 0, 300, 600 and 900mg kg-1 on growth performance and body composition of beluga, H. huso, juveniles was evaluate din two separate trials. In the first trial, 180 juveniles (525±9gw) were fed with the test diet for a period of 71 days, and the trial extended to another 126 days in the second phase by randomly selecting 120 juvenil...
[ 7 ] - Study on salinity tolerance and some physiological indicators of ion-osmoregulatory system in juvenile Beluga, Huso huso (Linnaeus, 1758) in the south Caspian Sea: Effect of age and size
The salinity tolerance and hydromineral regulation capabilities of juvenile great sturgeon, Huso huso, of different age and size groups (1: 35 days, BW: 0.60±0.02g &TL; 4.80±0.13clp; II: 35 days, BW: 2.23±0.20 g & TL: 7.19±0.17cm; III: 35 days, BW: 9.91±0.23g& TL: 11.86±0.24cm; IV: 50 days, BW: 3.97±0.25 g & TL: 9.34±0.18cm; V:50 days, BW:22.27±1.9g & TL: 17.25±0.35cm; VI: 65 days, BW: 6.3±0.67...
[ 8 ] - Effects of cortisol on tesicular apoptosis in goldfish (Carassius auratus)
Apoptosis is a programmed cell death that has been attributed to the action of stress hormones, such as cortisol. We investigated the in vitro effect of cortisol in goldfish (Carassius auratus) mature (GSI: 2.75-4.65) or immature (GSI: 1.94-2.4) testes. Testes were taken out and transferred into culture medium (M 199), cut into 20 mm thick slices and supplemented with fetal bovine serum (FBS), ...
[ 9 ] - Blood serum osmotic and ionic regulation of wild adults and reared juvenile Persian sturgeon, Acipenser persicus
The osmoregulatory system was studied in wild adult and reared juvenile Persian sturgeon, Acipenser persicus. The mean osmolarity in blood serum of specimens from the Caspian Sea, estuary, the Kouraneski pools and the rearing tanks were 305.3±14.3, 308.7±25.8, 265.0±19.1 and 259.3±8.8 mosmol/L, respectively; the mean concentrations of Na+ were 151.2±6.3, 152.2±8.4, 142.5±5.9 and 131.4±4.1 meq/L...
[ 10 ] - Ecophysiological indicators of stress in female Persian sturgeon, Acipenser persicus
The study on the ecophysiological impacts of stress in female Persian sturgeon broodfishes revealed that the average cortisol level varried in all broodfish caught at the Sefidrud River (163.38±21.2ng mL-1), Sefidrud River estuary (260.27±19.7ng mL-1) and Gorganrud River estuary (179.38±20.8ng mL-1). The variations in serum glucose levels were 140.65±12.05mg dL-1, 144.44±5.9mg dL-1 and 126.24±1...
[ 11 ] - Comparative study of biochemical and hematological features in reared sturgeons
Suitable physiological condition in fishes for the selection of broodfishes can be achieved through hematological studies. The present study aimed to examin the hematological indices in Juvenile Sturgeons at different stages of growth. Total albumin content in blood serum, hemoglobin concentration, the erythrocyte and leukocyte count of 54 sturgeon specimens (Persian sturgeon Acipenser persicus...
[ 12 ] - Effects of cortisol on tesicular apoptosis in goldfish (Carassius auratus)
Apoptosis is a programmed cell death that has been attributed to the action of stress hormones, such as cortisol. We investigated the in vitro effect of cortisol in goldfish (Carassius auratus) mature (GSI: 2.75-4.65) or immature (GSI: 1.94-2.4) testes. Testes were taken out and transferred into culture medium (M 199), cut into 20 mm thick slices and supplemented with fetal bovine serum (FBS), ...
[ 13 ] - Investigation of growth parameters, mortality and sex ratio of stellate sturgeon (Acipenser stellatus Pallas, 1771) from the southern of Caspian Sea
The aim of this study was to record growth parameters, mortality and sex ratio of Stellate Sturgeon (Acipenser stellatus) from the south basin of the Caspian Sea. 894 specimens were caught by fixed gill net and beach seine during April 2010 to March 2014. Male to female sex ratio was obtained 1:1.05 that was not differed significantly (p>0.05). The minimum and maximum length of the fish specime...
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