شناسايي مورفولوژيك و ميكروسكوپيك خيار دريايي پهنه جزر و مدي سواحل غربي خليج فارس

Morphologically and microscopically identification of sea cucumbers in the tidal zone of the western coast of the Persian Gulf

ﺟﻬﺖ ﺷﻨﺎﺳﺎﻳﻲ مورفولوژيكي و ﺑﺮرﺳﻲ ﺳﺎﺧﺘﻤﺎن اﺳﻜﻠﺘﻲ داخلي ﺧﻴﺎر­ﻫﺎي درﻳﺎﻳﻲ پهنه جزر و مدي ﺳﻮاﺣﻞ غربي ﺧﻠﻴﺞ ﻓﺎرس ﻧﻤﻮﻧﻪ ﺑﺮداري از 2 ايستگاه (بندر بستانه و جزيره هندورابي) ﺻﻮرت گرفت. شناسايي گونه ­هاي مورد برسي با استفاده از اسپيكول جدا شده از بافت عضله و توسط ميكروسكوپ اينورت دوربين دار و با كمك‌ كليدهاي شناسايي معتبر بررسي شد. ﺳﺮاﻧﺠﺎم ﭘﺲ از مطالعات مورفولوژيك و ﻣﻴﻜﺮوﺳﻜﻮﭘﻴﻚ اﻧﺠﺎم ﺷﺪه، چهار ﮔﻮﻧﻪ ﺧﻴﺎر درﻳﺎﻳﻲ ﺷﻨﺎﺳﺎﻳﻲ ﮔﺮدﻳﺪ. در مطالعه حاضر گونه­ هاي Stichopus horrens و Stichopus monotuberculatus براي اولين ­بار در جزيره هندورابي يافت شدند.. تحقيقات نشان داد كه فراوان­ترين نوع اسپيكول در خيار­دريايي گونه Holothuria parva اﺳﭙﻴﻜﻮل ﻣﻴﻠﻪ­اي ﺧﺎردار بوده و در گونه Holothuria arenicola نيز اسپيكول دكمه ­اي است. ويژگي شاخصي كه خيار دريايي گونه S. horrens را از گونه S. monotuberculatus متمايز مي ­كرد حضور اسپيكول ميلـه ­اي بـزرگ و پونز­ مـانند بـا سر پهن در پـاپيلاي پشتي ايـن گـونه بـود در حـاليكه اين نـوع اسپيكول در گونه S. monotuberculatus حضور نداشت.

The morphological identification and investigation of the internal skeletal structure of sea cucumbers in the tidal zone of the western coast of the Persian Gulf were performed by sampling from 2 stations (Bostaneh Port and Hendurabi Island). Species identification were performed using the Spicules detected form muscle tissue of the samples by Invert microscope and checked with valid identification keys. Finally, after morphological and microscopic studies four species of sea cucumbers were identified. In the present study Stichopus horrens and Stichopus monotuberculatus were found for the first time in the tidal zones of the western coasts of the Persian Gulf (Hendurabi Island). This study showed that the most frequent types of spicules were barrel and button types in the sea cucumbers genus of Holothuria parva and Holothuria arenicola respectively. The characteristic feature for distinguishing of S. horrens species from the S. monotuberculatus species was the presence of large table thumbtack shape on the dorsal papilar part of S. horrens species whereas this type of spicule was absent in the S. monotuberculatus species.