en hematology hematology پژوهشي Original research papers <p dir="ltr" style="margin: 0in 0in 0pt; text-align: justify; line-height: 200%; -ms-text-justify: kashida; text-kashida: 0%;"><font size="3"><font color="#000000"><span new="" style="font-family: " times="">A </span><em><span lang="EN-AU" mso-ansi-language:="" new="" style="font-family: " times="">5 </span></em><span lang="EN-AU" mso-ansi-language:="" new="" style="font-family: " times="">weeks</span><span new="" style="font-family: " times=""> study was conducted to determine the effects of different stocking density on hematological </span><span mso-fareast-font-family:="" new="" style="font-family: " times="">parameters of great sturgeon.</span><span new="" style="font-family: " times=""> Fish were cultured in duplicates of fiberglass tanks under stocking densities of 50, 75, 100 and 125 fish/m3 as T1, T2, T3 and T4 respectively. Based on the results significant increase (p<0.05) in total body weight and total length were related to low density group. The lowest </span></font><span new="" style="color: rgb(19, 19, 19); font-family: " times="">mean body weight (103.26 gr)</span><font color="#000000"><span new="" style="font-family: " times=""> and length (29.65 cm) were recorded in T4. At the end of experiment, Results of hematological analyses showed changes in the stocking density had non-significant impact on values of WBC and mean corpuscle hemoglobin (MCH) (p>0.05). The highest mean corpuscular hemoglobin concentration (MCHC) was also recorded in T4. The highest level of hemoglobin, hematocrit (7.25 g dl^-1 and 22.2%) were significantly associated with T1 (p<0.05).</span><span mso-fareast-font-family:="" new="" style="font-family: " times=""> </span><span new="" style="font-family: " times="">The findings suggested that the </span><span mso-fareast-font-family:="" new="" style="font-family: " times="">haematological parameters and growth performance </span><span mso-bidi-language:="" mso-fareast-font-family:="" new="" style="font-family: " times="">are considered as a benefactor for indicating </span><span new="" style="font-family: " times="">stress in fish due to different physical or chemical parameters.</span></font></font></p> strugeon, stocking density, hematological characteristics, growth performance 1 10 http://ijaah.ir/browse.php?a_code=A-10-165-3&slc_lang=en&sid=1 M Naderi Samani مهسا نادری سامانی samani.naderi.mah@ut.ac.ir 10031947532846001642 10031947532846001642 Yes 1Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran بخش بهداشت آبزیان داشکده دامپزشکی دانشگاه تهران H Jafaryan حجت الله جعفریان hojat.jafaryan@gmail.com 10031947532846001643 10031947532846001643 No 2Department of Fishery, Gonbad University of Agriculture Sciences and Naturar Resources, Gonbad, Iran. گروه شیلات دانشکده منابع طبیعی دانشگاه کشاورزی و منابع طبیعی گنبد S Jafaryan سمیرا جعفریان hojat.jafaryan@gmail.com 10031947532846001644 10031947532846001644 No 2Department of Fishery, Gonbad University of Agriculture Sciences and Naturar Resources, Gonbad, Iran. گروه شیلات دانشکده منابع طبیعی دانشگاه کشاورزی و منابع طبیعی گنبد