fa بررسی تراکم و تنوع زیستی ده پایان منطقه بین جزر و مدی سواحل شهر بوشهر در دو فصل سرد و گرم تخصصي Special پژوهشي Research <div> <table align="center" hspace="0" vspace="0"> <tbody> <tr> <td style="padding: 0in 12px; text-align: justify;" valign="top"><span style="font-size:11pt"><span style="line-height:normal"><span style="direction:rtl"><span style="unicode-bidi:embed"><span style="font-family:Calibri,sans-serif"><b><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">مقدمه:</span></span></span></span></b><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black"> ده &shy;پایان از مهم &shy;ترین گروه&shy; های تجاری و با ارزش در اکوسیستم &shy;های آبی می &shy;باشند. </span></span></span></span></span></span></span></span></span><br> <span style="font-size:11pt"><span style="line-height:normal"><span style="direction:rtl"><span style="unicode-bidi:embed"><span style="font-family:Calibri,sans-serif"><b><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">مواد و روش</span></span></span></span></b><b> </b><b><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">ها:</span></span></span></span></b><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black"> هدف از مطالعه حاضر، بررسی</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">ساختار</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">اجتماعات</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">ده</span></span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="background:white"><span new="" roman="" style="font-family:" times=""><span style="color:black">&shy;</span></span></span></span><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">پایان</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">منطقه</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">بین</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">جزرو</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">مدی</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">سواحل</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">صخره &shy;ای،گلی و ماسه &shy;ای</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">بوشهر</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">از سه</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">ایستگاه در دو فصل گرم (مرداد 1400) و فصل سرد</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">(بهمن 1400)، نمونه</span></span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="background:white"><span new="" roman="" style="font-family:" times=""><span style="color:black">&shy;</span></span></span></span><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">برداری</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">به</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">صورت</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">تصادفی</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">با</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">استفاده</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">از</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">یک کوادرات 50</span></span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="background:white"><span new="" roman="" style="font-family:" times=""><span style="color:black">&times;</span></span></span></span><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">50 سانتی</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">متر به</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">عنوان</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">واحد</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">نمونه</span></span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="background:white"><span new="" roman="" style="font-family:" times=""><span style="color:black">&shy;</span></span></span></span><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">برداری</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">انجام</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">شد. بعد</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">از</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">صید</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">و</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">جمع&shy;آوری نمونه</span></span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="background:white"><span new="" roman="" style="font-family:" times=""><span style="color:black">&shy;</span></span></span></span><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">های</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">درون هر</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">کوادرات به</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">ظروف</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">پلاستیکی درب</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">دار</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">مخصوص</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">نمونه</span></span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="background:white"><span new="" roman="" style="font-family:" times=""><span style="color:black">&shy;</span></span></span></span><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">برداری</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">منتقل</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">شد و</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">سپس</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">با ریختن</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">فرمالین</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">4</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">درصد</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">به</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">داخل ظروف، عمل</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">تثبیت نمونه</span></span></span></span><span dir="LTR" style="font-size:10.0pt"><span style="background:white"><span new="" roman="" style="font-family:" times=""><span style="color:black">&shy;</span></span></span></span><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">ها</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">انجام</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">گرفت. </span></span></span></span></span></span></span></span></span><br> <span style="font-size:11pt"><span style="line-height:normal"><span style="direction:rtl"><span style="unicode-bidi:embed"><span style="font-family:Calibri,sans-serif"><b><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">نتایج:</span></span></span></span></b><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black"> در مجموع&nbsp; 41 گونه ده &shy;پا متعلق به 12 خانواده و دو بالا راسته&shy; خرچنگ &shy;های حقیقی و خرچنگ &shy;های غیر&shy;حقیقی شناسایی گردید و گونه </span></span></span></span><i><span dir="LTR" style="font-size:10.0pt"><span style="background:white"><span new="" roman="" style="font-family:" times=""><span style="color:black">Petrolisthes leptocheles</span></span></span></span></i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black"> به &shy;عنوان فراوان&shy; ترین گونه شناخته شده است.گونه &shy;های </span></span></span></span><i><span dir="LTR" style="font-size:10.0pt"><span style="background:white"><span new="" roman="" style="font-family:" times=""><span style="color:black">Pacheles natalensis</span></span></span></span></i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">، </span></span></span></span><i><span dir="LTR" style="font-size:10.0pt"><span style="background:white"><span new="" roman="" style="font-family:" times=""><span style="color:black">Clibanarius syngnathus</span></span></span></span></i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black"> و </span></span></span></span><i><span dir="LTR" style="font-size:10.0pt"><span style="background:white"><span new="" roman="" style="font-family:" times=""><span style="color:black">Uca inversa</span></span></span></span></i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black"> بعد از گونه&shy; </span></span></span></span><i><span dir="LTR" style="font-size:10.0pt"><span style="background:white"><span new="" roman="" style="font-family:" times=""><span style="color:black">Petrolisthes leptocheles</span></span></span></span></i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black"> در دو فصل سرد و گرم، با تراکم زیاد مشاهده گردیدند. در طول نمونه &shy;برداری به</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">طورکلی تراکم در فصل سرد از فصل گرم بیش</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">تر بود. هم</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">چنین</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">در این پژوهش شاخص &shy;های اکولوژیک شانون و سیمپسون برای</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">محاسبه</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">تنوع</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">و</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">پراکنش</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">ده &shy;پایان</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">منطقه</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">مورد</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">مطالعه بر</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">اساس ارتباط</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">بین</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">تعداد کل</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">گونه &shy;ها</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">و</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">تعداد</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">کل</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">افراد</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">تشکیل</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">دهنده</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">گونه &shy;ها، استفاده</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">شد که شاخص &shy;های اکولوژیک شانون و سیمپسون به</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">طور میانگین به</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">ترتیب 2/09 و 0/14 ارزیابی گردید، که نتایج</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">حاصل</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">از</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">تست</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">توکی</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">تحلیل</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">واریانس</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">یک &shy;طرفه بین شاخص شانون و ایستگاه &shy;ها در دو فصل سرد و گرم،</span></span></span></span><i> </i><span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">وجود اختلاف معنی</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">داری بین تمام ایستگاه&shy; ها با بیش</span></span></span></span> <span lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span b="" baran="" style="font-family:"><span style="color:black">ترین میزان شاخص در سطح 0/001 را نشان داد.</span></span></span></span></span></span></span></span></span><br> <b><span dir="RTL" lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span style="line-height:107%"><span b="" baran="" style="font-family:"><span style="color:black">بحث و نتیجه</span></span></span></span></span> <span dir="RTL" lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span style="line-height:107%"><span b="" baran="" style="font-family:"><span style="color:black">گیری:</span></span></span></span></span></b><span dir="RTL" lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span style="line-height:107%"><span b="" baran="" style="font-family:"><span style="color:black"> نتایج بیانگر ثبات و کم تنش بودن سواحل مورد بررسی می &shy;باشند و توزیع و فراوانی گونه &shy;ها به</span></span></span></span></span> <span dir="RTL" lang="AR-SA" style="font-size:12.0pt"><span style="background:white"><span style="line-height:107%"><span b="" baran="" style="font-family:"><span style="color:black">صورت تقریباً یکنواختی در تمام سواحل دیده شدند. ایستگاه شماره 1 (نفتکش) با توجه به بالا بودن میزان شاخص شانون و وجود انواع سواحل، تنوع و تراکم گونه &shy;ای بالاتری نسبت به دیگر ایستگاه &shy;ها دارا می &shy;باشد.</span></span></span></span></span></td> </tr> </tbody> </table> </div> <div style="text-align: justify;"></div> <div style="text-align: justify;"><span style="font-size:11pt"><span style="line-height:normal"><span style="font-family:Calibri,sans-serif"><b><span style="font-family:&quot;Times New Roman&quot;,serif">Introduction:</span></b><span style="font-family:&quot;Times New Roman&quot;,serif"> Decapods is one of the most important commercial and valuable groups in aquatic ecosystems. </span></span></span></span><br> <span style="font-size:11pt"><span style="line-height:normal"><span style="font-family:Calibri,sans-serif"><b><span style="font-family:&quot;Times New Roman&quot;,serif">Materials & Methods: </span></b><span style="font-family:&quot;Times New Roman&quot;,serif">The purpose of this study is to investigate the community structure of the Decapods of the intertidal area of ​​the rocky, muddy and sandy beaches of Bushehr from three stations in two warm seasons (August 2021) and cold season (February 2021), sampling in the form of Random sampling was done using a 50&times;50 cm square as a sampling unit</span><span dir="RTL" lang="FA" style="font-family:&quot;Times New Roman&quot;,serif">.</span><span style="font-family:&quot;Times New Roman&quot;,serif"> After catching and collecting the samples in each quadrat, they were transferred to plastic containers with lids for sampling, and then by pouring 4% formalin into the containers, the samples were fixed. </span></span></span></span><br> <b><span style="font-size:11.0pt"><span style="line-height:107%"><span style="font-family:&quot;Times New Roman&quot;,serif">Results:</span></span></span></b><span style="font-size:11.0pt"><span style="line-height:107%"><span style="font-family:&quot;Times New Roman&quot;,serif"> In total, 41 species of decapods belonging to 12 families and two orders of true crabs and non-true crabs were identified, and <i>Petrolisthes leptocheles</i> species is known as the most abundant species. <i>Pacheles natalensis</i>, <i>Clibanarius syngnathus</i> and <i>Uca inversa</i> after<i> Petrolisthes leptocheles </i>were observed with high density in both cold and warm seasons. During sampling, in general, the density was higher in the cold season than in the warm season. Also, in this research, Shannon and Simpson&#39;s ecological indices were used to calculate the diversity and distribution of the Decapods of the study area based on the relationship between the total number of species and the total number of individuals constituting the species, which Shannon&#39;s ecological indices and Simpson were evaluated on average as 2.09 and 0.14 respectively. The results of Tukey&#39;s one-way variance analysis between the Shannon index and the stations in both cold and warm seasons showed a significant difference between all the stations with the highest index at the 0.001 level.<br> <b>Conclusion:</b> the results show the stability and low stress of the investigated beaches, and the distribution and abundance of species were seen almost uniformly in all the beaches. Station No. 1 (Oil Tanker) has a higher diversity and density of species compared to other stations due to the high Shannon index and the presence of various types of beaches.</span></span></span></div> خرچنگ های حقیقی, منطقه بین جزر و مدی, خلیج فارس, خرچنگ های غیرحقیقی, شاخص تنوع, تراکم و فراوانی True crabs, Intertidal zone, Persian Gulf, Unreal crabs, Diversity index 71 80 http://journalaer.com/browse.php?a_code=A-10-2-54&slc_lang=fa&sid=1 Yaghoob Parsa یعقوب پارسا parsayaghoob@gmail.com 10031947532846001223 10031947532846001223 Yes Bita Archangi بیتا ارچنگی 10031947532846001224 10031947532846001224 No Ahmad Savari احمد سواری 10031947532846001225 10031947532846001225 No Babak Dustshenas بابک دوست شناس 10031947532846001226 10031947532846001226 No Amir Vazirizadeh امیر وزیری زاده 10031947532846001227 10031947532846001227 No