بررسي انواع و شاخص هاي آناتوميك كليه در خانواده هاي غالب ماهيان شمال غرب خليج فارس

مطالعه حاضر به منظور بررسي هيستومتري ساختار بافتي پوست ماهي شانك زردباله صورت گرفت. به اين منظور 20 عدد ماهي شانك زرد باله از تالاب نيشكر جمع آوري و از نواحي مختلف پوست (جانبي، شكمي و دمي) نمونه هاي بافتي اخذ گرديد و در فرمالين 10 درصد تثبيت شدند. سپس بر اساس روش هاي معمول بافت شناسي لام ها تهيه و با ميكروسكوپ نوري مطالعه شدند. بر طبق نتايج به دست آمده پوست در نواحي مختلف علي رغم اختلاف از لحاظ هيستومتري از دو لايه اپيدرم و درم كه بر روي بافت همبند سستي به نام هيپودرم قرار گرفته تشكيل شده است. بر اساس مطالعه انجام شده بافت پوست از لحاظ هيستومتري در نواحي مختلف داراي تفاوت¬هاي معني داري بود، به طوريكه بيشترين ضخامت در لايه اپيدرم و درم مربوط به قسمت جانبي بود كه نسبت به ناحيه شكمي و دمي پوست داراي تفاوت معني داري بود (p 0/05).

In the present study, types of kidney in different fish species from northwest of Persian Gulf as well as relative anatomical indices such as relative length and weight were determined. 21 fish species were sampled from fishing areas in northwest of Persian Gulf. Firstly, kidneys were picked up along vertebral cord and fixed in Bouin’s solution. Following fixation, kidneys were separated and examined for determination of types and biometric measurements. Observations showed that kidneys from 21 studied fish species from northwest parts of Persian Gulf belonged to three different types of fish kidney. Also there were significant differences among studied fish species in relative kidney length and weight per body values. The results showed no significant differences in the relative length and weight of kidneys (P 0.05). According to the results, it may be concluding that kidney show some distinct interspecific differences in type and morphology among fish species. Relative kidney length and weight have been affected evolutionary by body length and ecological properties such as fish activity. Fishes with flat form body and low activity showed the lowest relative kidney length and weight in comparison with pelagic fish species.