fa مطالعه مقایسه‌ای خصوصیات مورفومتریک و مریستیک جمعیت‌های شگ‌ماهی خزری (Alosa caspia (Eichwald, 1838 در سواحل جنوبی دریای خزر تخصصي Special پژوهشي Research <div style="text-align: justify;"><strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">تحقیق</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">حاضر</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">با موضوع</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">مقایسه</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">فاکتورهای</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">مورفومتریک</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">و</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">مریستیک</span></span></strong><strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">بین جمعیت&shy;های شگ&shy;ماهی خزری&nbsp;</span></span></strong><strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">(</span></span></strong><strong><em><span dir="LTR"><span style="font-size:9.0pt;">A. caspia</span></span></em></strong><strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">) </span></span></strong><strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">در سواحل جنوبی دریای خزر انجام شد. </span></span></strong><strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">در این بررسی</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">285 نمونه</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">شگ&shy;ماهی</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">خزری</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">از</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">غرب</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">به</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">شرق</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">قسمت</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">جنوبی</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">دریای</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">خزر،</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">گیلان (بندرانزلی)،</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">مازندران (ساری) و</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">گلستان (میانکاله) جمع‌آوری</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">شد.</span></span></strong> <strong><span style="color:black;"><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">30 خصوصیت ریختی و 10 خصوصیت شمارشی مورد بررسی قرار گرفت. </span></span></span></strong><strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">نتایج آزمون&shy;های </span></span></strong><strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">مولفه&shy;های</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">اصلی، تابع</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">تشخیص</span></span></strong><strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;"> و </span></span></strong><strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">تحلیل متغیرهای کانونی در مورد صفات </span></span></strong><strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">شمارشی، اختلاف ناچیز جمعیت&shy;های مورد بررسی را نشان داد. </span></span></strong><strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">از اینرو می&shy;توان اذعان نمود که تفاوت شرایط زیست&shy;محیطی و تغذیه&shy;ای سبب تفاوت&shy;های ریختی نسبتاً ضعیفی بین جمعیت&shy;های مورد مطالعه گردیده است. </span></span></strong><strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">با</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">این</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">وجود</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">تأیید</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">این</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">نتایج</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">در</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">گرو مطالعات</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">بیشتر</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">صفات</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">ژنتیکی،</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">فیزیولوژیک</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">و</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">استخوان</span></span></strong><strong><span dir="LTR"><span style="font-family:b lotus;"><span style="font-size:9.0pt;">&shy;</span></span></span></strong><strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">شناسی جمعیت&shy;های</span></span></strong> <strong><span style="font-family:b nazanin;"><span style="font-size:10.0pt;">فوق است.</span></span></strong></div> <strong>T</strong><strong>he present study was conducted on the comparison of morphometric and meristic factors among <em>Alosa caspia</em> (Eichwald, 1838)</strong> <strong>populations in the southern Caspian Sea basin. A total of 285 <em>Alosa caspia</em> specimens were caught from three localities, from west to the east of Caspian Sea including Guilan (Bandar Anzali), Mazandaran (Sari) and Golestan (Miankale) provinces. </strong><strong>Thirty morphometric and ten meristic </strong><strong>traits</strong><strong> were examined. </strong><strong>The results of principal components analysis, the discriminant </strong><strong>factor analysis</strong><strong> and canonical variates analysis on the counting traits indicate the little difference of specimens among populations. Therefore, it can be stated that differences in environmental and nutritional conditions caused relatively poor morphological differences among the populations studied. However, these results need to be verified by further studies on genetic, physiological and osteological characteristics in the populations.</strong><br> <br> &nbsp; A. caspia, مورفومتریک, مریستیک, جمعیت. Morphometric, Meristic, Alosa caspia, Population, Shad. 127 134 http://jair.gonbad.ac.ir/browse.php?a_code=A-10-516-1&slc_lang=fa&sid=1 somaye khataminejad سیده سمیه خاتمی نژاد khataminezhad@yahoo.com 10031947532846004443 10031947532846004443 Yes Biology, Faculty of Science, University of Guilan, Rasht دانشگاه گیلان ali bani علی بانی bani.ali@gmail.com 10031947532846004444 10031947532846004444 No Biology, Faculty of Science, University of Guilan, Rasht, دانشگاه گیلان keyvan abbasi کیوان عباسی Keyvan_abbasi@yahoo.com 10031947532846004445 10031947532846004445 No Expert Inland waters aquaculture research center, iranian fisheries science research institute, agricultural research, education and extension organization, Bandar anzali سازمان تحقیقات، آموزش و ترویج کشاورزی