fa برآورد بهترین مدل رشد ماهی سفید R. kutum در صیدگاه‌های استان مازندران (جنوب دریای کاسپین) شیلات Fisheries پژوهشي Research <div style="text-align: justify;"><span style="font-size:11pt"><span style="line-height:115%"><span style="direction:rtl"><span style="unicode-bidi:embed"><span style="font-family:Calibri,sans-serif"><span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black">این مطالعه باهدف برآورد بهترین مدل رشد ماهی سفید </span></span></span></span><i><span dir="LTR" new="" roman="" style="font-family:" times=""><span style="color:black">R</span></span></i><i><span dir="LTR" style="font-size:12.0pt"><span style="line-height:115%"><span new="" roman="" style="font-family:" times=""><span style="color:black">. </span></span></span></span></i><i><span dir="LTR" new="" roman="" style="font-family:" times=""><span style="color:black">kutum</span></span></i> <span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black">در صیدگاه&shy;های استان مازندران (جنوب دریای کاسپین) بین مهرماه 1398 تا اسفندماه 1399 صورت گرفت. در این مطالعه تعداد 426 عدد ماهی سفید شامل 178 عدد نر و 248 ماده از صیدگاه&shy;های مازندران توسط تورهای پره ساحلی صید و پس از بیومتری، تعیین جنسیت شدند. میانگین طول ماهیان سفید نر و ماده به ترتیب 44/0</span></span></span></span><span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span cambria="" style="font-family:"><span style="color:black">&plusmn;</span></span></span></span><span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black">28/35 سانتی&shy;متر و 48/0</span></span></span></span><span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span cambria="" style="font-family:"><span style="color:black">&plusmn;</span></span></span></span><span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black">84/38 سانتی&shy;متر و توزیع فراوانی طولی برای دو جنس نر و ماده دارای اختلاف معنی&shy;داری بود (05/0</span></span></span></span> <span dir="LTR" new="" roman="" style="font-family:" times=""><span style="color:black">P<</span></span><span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black">).</span></span></span></span><span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black"> بر اساس </span></span></span></span><span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black">بررسی منحنی&shy;های رشد از طریق رویکرد استنتاجی چند مدلی (</span></span></span></span><span dir="LTR" new="" roman="" style="font-family:" times=""><span style="color:black">MMI</span></span><span b="" lang="FA" mitra="" style="font-family:"><span style="color:black">)</span></span><span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black">، بهترین مدل برای توصیف نحوه رشد ماهی سفید نر و ماده به ترتیب مدل رشد فون برتالنفی با 3 پارامتر و مدل رشد </span></span></span></span><span dir="LTR" new="" roman="" style="font-family:" times=""><span style="color:black">Gompertz</span></span><span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black"> بود.</span></span></span></span> <span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black">با توجه به مدل&shy;های رشد آزمایش‌شده در این مطالعه، مقادیر </span></span></span></span><span dir="LTR" new="" roman="" style="font-family:" times=""><span style="color:black">L&infin;</span></span><span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black">، </span></span></span></span><span dir="LTR" new="" roman="" style="font-family:" times=""><span style="color:black">K</span></span><span b="" lang="FA" mitra="" style="font-family:"><span style="color:black">، </span></span><span dir="LTR" new="" roman="" style="font-family:" times=""><span style="color:black">t₀</span></span><span dir="LTR" style="font-size:12.0pt"><span style="line-height:115%"><span new="" roman="" style="font-family:" times=""><span style="color:black">,</span></span></span></span><span style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black"> و اندازه در زمان تولد برای ماهی سفید نر </span></span></span></span><i><span dir="LTR" new="" roman="" style="font-family:" times=""><span style="color:black">R. kutum</span></span></i><span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black"> به ترتیب 2/53 سانتی&shy;متر، 251/0 در سال، 57/0- و 93/3 سانتی&shy;متر، برای ماهی سفید ماده </span></span></span></span><i><span dir="LTR" new="" roman="" style="font-family:" times=""><span style="color:black">R</span></span></i><i><span dir="LTR" style="font-size:12.0pt"><span style="line-height:115%"><span new="" roman="" style="font-family:" times=""><span style="color:black">. </span></span></span></span></i><i><span dir="LTR" new="" roman="" style="font-family:" times=""><span style="color:black">kutum</span></span></i><i> </i><span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black">به ترتیب 71/58</span></span></span></span> <span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black">سانتی&shy;متر، 221/0 در سال،</span></span></span></span> <span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black">617/0- و 12/4 سانتی&shy;متر بود. مقایسه منحنی رشد بین نر و ماده به روش </span></span></span></span><span dir="LTR" new="" roman="" style="font-family:" times=""><span style="color:black">likelihood</span></span> <span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black">بیانگر تفاوت معنی‌دار بین منحنی&shy;های رشد نر و ماده بود (05/0</span></span></span></span> <span dir="LTR" new="" roman="" style="font-family:" times=""><span style="color:black">P<</span></span><span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black">).</span></span></span></span> <span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black">ضریب مرگ‌ومیر کل برای ماهی سفید نر و ماده از طریق رسم منحنی صید سنی به ترتیب 015/1 و 673/0 در سال به دست آمد.</span></span></span></span> <span lang="FA" style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black">نتایج این مطالعه نشان داد که برای درک بهتر و گزینش بهترین مدل توصیف رشد گونه تجاری و ارزشمند ماهی سفید، استفاده از مدل فون برتالنفی و </span></span></span></span><span dir="LTR" new="" roman="" style="font-family:" times=""><span style="color:black">Gompertz</span></span><span style="font-size:12.0pt"><span style="line-height:115%"><span b="" mitra="" style="font-family:"><span style="color:black"> توصیه می&shy;گردد.</span></span></span></span></span></span></span></span></span></div> <pre style="text-align:justify"> <span style="font-size:10pt"><span style="font-family:Consolas"><span style="font-size:12.0pt"><span new="" roman="" style="font-family:" times=""><span style="color:black">This study was carried out to estimate the best growth model of kutum (<i>Rutilus kutum</i>) caught in fishing grounds of Mazandaran (the south Caspian Sea) from October 2019 until March 2021. In this study, 426 kutum including 178 males and 248 females were bought from Mazandaran fishing grounds and were subjected to biometrics and gender determination. Mean length of male and female kutum were 35.28&plusmn;0.44 cm and 38.84&plusmn;0.48 cm, respectively. Length-frequency distribution of both sexes had significant differences (p<0.05). </span></span></span><span lang="EN" style="font-size:12.0pt"><span new="" roman="" style="font-family:" times=""><span style="color:black">Based on the analysis of growth curves through the MMI theoretical information approach, the best model to describe the growth of male and female kutums was the 3-parameter Von Bertalanfy growth model and the Gompertz growth model, respectively</span></span></span><span style="font-size:12.0pt"><span new="" roman="" style="font-family:" times=""><span style="color:black">.</span></span></span><span lang="EN" style="font-size:12.0pt"><span new="" roman="" style="font-family:" times=""><span style="color:black"> According to the growth models tested in this study, the values ​​of L_&infin;, K, t₀, and birth size for male kutum were 53.2 cm, 0.251</span></span></span><span style="font-size:12.0pt"><span new="" roman="" style="font-family:" times=""><span style="color:black"> y^-1</span></span></span><span lang="EN" style="font-size:12.0pt"><span new="" roman="" style="font-family:" times=""><span style="color:black">, -0.57 and 3.93 cm, respectively and were 58.71 cm, 0.221</span></span></span><span style="font-size:12.0pt"><span new="" roman="" style="font-family:" times=""><span style="color:black"> y^-1</span></span></span><span lang="EN" style="font-size:12.0pt"><span new="" roman="" style="font-family:" times=""><span style="color:black">, -0.617 and 4.12 cm for female kutum, respectively.</span></span></span> <span style="font-size:12.0pt"><span new="" roman="" style="font-family:" times=""><span style="color:black">According to likelihood method, growth curves of male and females were significantly different (p<0.05). Using age-catch curve, total mortality coefficients were 1.015 and 0.673 for males and females kutum, respectively.</span></span></span> <span lang="EN" style="font-size:12.0pt"><span new="" roman="" style="font-family:" times=""><span style="color:black">The results of this study showed that for a better understanding and selection of the best model to describe the growth of commercial and valuable species of kutum, it is recommended to use a MMI approach and test different models.</span></span></span><span style="font-size:12.0pt"><span new="" roman="" style="font-family:" times=""><span style="color:black"></span></span></span></span></span></pre> رویکرد چند مدلی, مدل Gompertz, مدل Logistic, مدل فون برتالنفی, مرگ‌ومیر MMI, Gompertz model, Logistic model, Von Bertalanfy model, Mortality. 107 120 http://jmb.ahvaz.iau.ir/browse.php?a_code=A-10-689-2&slc_lang=fa&sid=1 Abolfazl Vaseh Haghdoust ابوالفضل واسع حقدوست 10031947532846006786 10031947532846006786 No sara Haghparast سارا حق پرست 10031947532846006787 10031947532846006787 Yes Farid Firoozbakhsh فرید فیروزبخش 10031947532846006788 10031947532846006788 No Hadi Raeisi هادی رییسی 10031947532846006789 10031947532846006789 No