fa بررسی پارامترهای رشد و طول-وزن ماهی سفید(Kamensky, 1901) R. kutum در پره های استان مازندران در جنوب دریای کاسپی تخصصي Special كاربردي Applicable <span style="font-size:11pt"><span style="tab-stops:75.2pt"><span style="direction:rtl"><span style="unicode-bidi:embed"><span style="line-height:107%"><span style="font-family:Calibri,sans-serif"><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">این مطالعه با هدف برآورد پارامترهای رشد ماه</span></span></span><span lang="AR-SA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">ی سفید</span></span></span><b><i> </i></b><i><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">R. kutum </span></span></i><span lang="AR-SA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">از مهرماه 1402 تا فروردین ماه&nbsp; </span></span></span>&nbsp;<span lang="AR-SA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">1403</span></span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">، در صیدگاه های استان مازندران صورت گرفت.در این مطالعه تعداد 286 ماهی مورد بیومتری و توزین قرار گرفت که 149 نمونه شامل 65 نر و 84 ماده برای زیست سنجی بررسی سن و جنسیت به آزمایشگاه دانشگاه ساری و گنبد منتقل شد. توزیع فراوانی طولی برای دو جنس نر و ماده دارای اختلاف معنی&shy;داری بود (</span></span></span> <span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">43/5= </span></span></span><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">D_KS</span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:"> ، 149 = </span></span></span><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">N</span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">). رابطه نمایی طول چنگالی و وزن کل در حالت معمول </span></span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">برای جمعیت ماهی سفید</span></span></span><b><i> </i></b><i><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">R. kutum </span></span></i><i>&nbsp;</i><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">&nbsp;و جنس نر و ماده قبل از برازش به ترتیب (^947/2</span></span></span><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">L</span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">0045/0</span></span></span><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">W=</span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">) ، (^8940/2</span></span></span><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">L </span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">0191/0</span></span></span><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">W=</span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">) و (^154/3</span></span></span><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">L</span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">0076/0</span></span></span><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">W=</span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">) بدست آمد. </span></span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">با استفاده از داده های سن در طول با استفاده از معادله گولاند و هولت، پارامترهای ضریب رشد سالانه </span></span></span><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">K </span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">&nbsp;&nbsp;و طول بی نهایت </span></span></span><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">L&infin;</span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:"> برای ماهی سفید </span></span></span><i><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">R. kutum </span></span></i><i><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">&nbsp;&nbsp;محاسبه شد. </span></span></span></i><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">ضریب رشد سالانه </span></span></span><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">K</span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:"> و طول بی نهایت </span></span></span><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">L&infin;</span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">، برای جمعیت ماهی سفید </span></span></span><i><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">R. kutum<b> </b></span></span></i><b><i>&nbsp;&nbsp;</i></b><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">به ترتیب 179/0 در سال و 84/62 سانتیمتر، برای جنس نر به ترتیب 23/0 در سال و 25/52 سانتیمتر در سال و برای جنس ماده به ترتیب 164/0 و 16/64 سانتیمتر در سال بدست آمد میزان سن بی نهایت </span></span></span><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">Tmax</span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:"> برای جمعیت، جنس نر و ماده ماهی سفید به ترتیب، 38/15 سال، 12 سال و 29/18 سال بدست آمد. عدد فای پریم مونرو </span></span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span cambria="" style="font-family:">ф</span></span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:"> برای جمعیت، جنس نر و ماده ماهی سفید<i> </i></span></span></span><i><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">R. kutum</span></span></i><i><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">، </span></span></span></i><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">94/2، 79/2 و 82/2 بدست آمد. با توجه به اهمیت تجاری بالای<i> ماهی سفید </i></span></span></span><i><span dir="LTR" style="line-height:107%"><span new="" roman="" style="font-family:" times="">R. kutum </span></span></i><i>&nbsp;&nbsp;</i><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span b="" nazanin="" style="font-family:">نیاز به پایش سالانه ضرایب رشد و طول بی نهایت ماهی سفید وجود دارد.</span></span></span><span lang="FA" style="font-size:9.0pt"><span style="line-height:107%"><span style="font-family:"B Nazanin""></span></span></span></span></span></span></span></span></span><br> &nbsp; <span style="font-size:11pt"><span style="line-height:107%"><span style="font-family:Calibri,sans-serif"><b><span style="font-size:10.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">This study was conducted for estimation growth of </span></span></span></b><b><span style="font-size:10.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">R. kutum </span></span></span></b><b><span style="font-size:10.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">from October 2023 to March 2024 in fishing grounds of Hormozgan province. A total of 286 specimens were weighed and measured. 149 samples, including 65 males and 84 females, were transferred to the University of Sari and Gonad laboratories for evaluation age and gender.</span></span></span></b><b> </b><b><span style="font-size:10.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">Length-frequency distribution of both sexes had significant differences. The </span></span></span></b><b><span style="font-size:10.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">Exponential relationship between</span></span></span></b><b><span style="font-size:10.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times=""> Fork length and total weight were estimated </span></span></span></b><b><span style="font-size:10.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">of population, males and females were as W=0.0045L^2.947and W=0.0191L^2.894 and W = 0.0076L^3.154 respectively. Age at length data were used for evaluated </span></span></span></b><b><span style="font-size:10.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">parameters of K and L&infin; By Goland and Holt equation. K and L</span></span></span></b><b><span style="font-size:10.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">&infin;</span></span></span></b><b><span style="font-size:10.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times=""> for population male and female were calculated of R. kutum, were calculated 0.179 year^-1 and 62.84 cm, 0.23 year^-1and 52.25cm, 0.164 year^-1and 64.16 cm respectively. Tmax </span></span></span></b><b><span style="font-size:10.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">of </span></span></span></b><b><i><span style="font-size:10.0pt"><span style="background:yellow"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">R. kutum</span></span></span></span></i></b><b> </b><b><span style="font-size:10.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">for population, male and female were estimated, 15.38, 12 and 18.29 year respectively. Phi Prime </span></span></span></b><b><span style="font-size:10.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">ф</span></span></span></b><b><span style="font-size:10.0pt"><span style="line-height:107%"><span new="" roman="" style="font-family:" times=""> index of population, male and female were estimated 2.94, 2.79 and 2.82 respectively<span style="background:yellow">. W</span></span></span></span></b><b><span style="font-size:10.0pt"><span style="background:yellow"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">&infin;</span></span></span></span></b><b><span style="font-size:10.0pt"><span style="background:yellow"><span style="line-height:107%"><span new="" roman="" style="font-family:" times="">&nbsp; for population, male and female were estimated, 3619, 2011 and 3807gr respectively.</span></span></span></span></b><b><span style="font-size:10.0pt"><span style="line-height:107%"><span style="font-family:"Times New Roman",serif"></span></span></span></b></span></span></span><br> <br> &nbsp; ماهی سفید, استان مازندران, طول بی نهایت, ضریب رشد سالانه, دریای کاسپی R. kutum, Hormozgan province, L∞, growth coefficient (K), Caspian Sea 71 80 http://jair.gonbad.ac.ir/browse.php?a_code=A-10-149-5&slc_lang=fa&sid=1 ARSALAN rezaei ارسلان رضایی arsalanrezaie131997@gmail.com 10031947532846009581 10031947532846009581 No Gonbad Uiniversity دانشگاه گنبد کاووس Hadi raeisi هادی رییسی Raeisi_hadi@yahoo.com 10031947532846009582 10031947532846009582 Yes Gonbad Uiniversity دانشگاه گنبد کاووس Sara Haghparast سارا حق پرست sarah_haghparast@yahoo.com 10031947532846009583 10031947532846009583 No Sari Agricultural Sciences and Natural Resources دانشگاه کشاورزی و منابع طبیعی ساری rahman patimar رحمان پاتیمار rpatimar@gmail.com 10031947532846009584 10031947532846009584 No Gonbad Uiniversity دانشگاه گنبد کاووس hojat Jafarian حجت جعفریان hojat.jafaryan@gmail.com 10031947532846009585 10031947532846009585 No Gonbad Uiniversity دانشگاه گنبد کاووس