1341

بررسي ارتباط بين پراكنش، تراكم و زيتوده ماكروبنتوزها با ميزان صيد ماهي سفيد (Rutilus kutum در آب‌هاي منطقه جنوب شرق درياي خزر (مازندران- منطقه گهرباران)

نادري جلودار، مهدي

ﻫﺎﺷﻤﯿﺎن، ﻋﺒﺪاﻟﻪ ، همكارطرح , ﺳﺎﻻروﻧﺪ، ﻏﻼﻣﺮﺿﺎ ، همكارطرح , دﺷﺘﯽ، ﻋﻠﯽ ، همكارطرح , رﺳﺘﻤﯽ، ﮐﺎردر ، همكارطرح , ﺻﻔﺮي، ﻓﯿﺮوز ، همكارطرح , ﺷﯿﺦ اﻻﺳﻼﻣﯽ، ﻋﺒﺎس ، همكارطرح , اﻟﯿﺎﺳﯽ، ﻓﺮزاد ، همكارطرح , ﻣﺤﻤﻮدي، ﺣﻤﯿﺪرﺿﺎ ، همكارطرح , ﻻﻟﻮﯾﯽ، ﻓﺮاﻣﺮز ، همكارطرح , ﺟﺎﻧﺒﺎز، ﻋﻠﯽ اﺻﻐﺮ ، همكارطرح , ﭘﺮاﻓﮑﻨﺪه ﺣﻘﯿﻘﯽ، ﻓﺮخ ، همكارطرح , ﺑﯿﻨﺎﯾﯽ، ﻣﺤﻤﺪ ، همكارطرح , اﻓﺮاﺋﯽ ﺑﻨﺪﭘﯽ، ﻣﺤﻤﺪ ﻋﻠﯽ ، همكارطرح , اﺳﻼﻣﯽ، ﻓﺮﺷﺘﻪ ، همكارطرح , رﺿﺎﯾﯽ ﻧﺼﺮآﺑﺎدي، ﻋﻠﯽ ، همكارطرح

1397

ﺳﺎزﻣﺎن ﺗﺤﻘﯿﻘﺎت، آﻣﻮزش و ﺗﺮوﯾﺞﮐﺸﺎورزي - ﻣﻮﺳﺴﻪ ﺗﺤﻘﯿﻘﺎت ﻋﻠﻮم ﺷﯿﻼﺗﯽ ﮐﺸﻮر

اين مطالعه در بخش شرقي حوزه جنوبي درياي خزر، در منطقه مازندران و در نيم خط گهرباران صورت پذيرفت. براي نمونه برداري تعداد چهار ايستگاه در عمق 5 متر و چهار ايستگاه در عمق 10 متر انتخاب گرديده و نمونه برداري به صورت ماهانه از ارديبهشت 1392 لغايت فروردين 1393 انجام پذيرفت. نمونه برداري بزرگ بي مهرگان كفري در هر ايستگاه در سه تكرار توسط Van Veen Grab با سطح مقطع 33٫33 سانتي متر مربع انجام شد. نتايج مطالعه حاضر نشان داد كه متوسط مواد آلي كل (TOM) در بين ايستگاه هاي مختلف اختلاف معني دار نداشت ( 0 / 05P). درصد اندازه دانه بندي رسوبات با ميانگين 0 / 125- 0 / 063 ميلي متر بين ايستگاه هاي 7 و 8 با تمامي ايستگاه ها به استثناي ايستگاه 1 داراي اختلاف معني دار بوده( 0 / 05>P) وساير دانه بندي هاي رسوبات در بين ايستگاه هاي مختلف اختلاف معني دار نداشتند ( 0 / 05P)، بطوري كه ايستگاه 8 با عمق 10 متر و ايستگاه 4 با عمق 5 متر به ترتيب از حداقل و حداكثر مقدار برخوردار بودند. در مجموع 23 گونه از انواع ماهيان صيد شدند كه در پره هاي صيادي دو گونه ماهي سفيد درياي خزر (Rutilus kutum) و كفال طلايي( Liza aurata) غالب بودند. در مطالعه حاضر در مجموع ماهي سفيد درياي خزر 73 / 05 درصد بيشترين فراواني را در صيد داشته و گونه Liza aurata در مجموع 24 / 67 درصد از كل صيد را به خود اختصاص داده و در رده دوم قرار داشت. با توجه به تركيب فراواني بزرگ بي مهرگان كفري و كاهش ذخاير دو كفه اي ها در منطقه گهرباران و در اكوسيستم درياي خزر، اين طعمه مهم غذايي براي ذخاير ماهي سفيد درياي خزر كافي نيست.

Abstract This study was carried out in the eastern part of the southern part of the Caspian Sea, in the Mazandaran area and in the middle of the Goharbaran. For sampling were selected four stations at a depth of 5 meters and four stations at a depth of 10 meters. Sampling was carried out on a monthly basis from May 2013 to April 2014. Sampling of grain size was performed at each station in three replications by Van Veen Grab with a 33/33 cm2. TOM percentage was no significant differences between different stations (p> 0.05). Grains size data showed that the average percentage of grain size with the size of 0.063> mm between station 8 with stations 2 and 4 was different compared to other stations (P <0.05). The Grain size percentage of sediments with mean 0.063-0.125 mm between stations 7 and 8 was significantly different with all stations except station 1 (P<0.05. The results of this study showed that although the Grain size percentage with averages of 0.126-0.250, 0.251-0.500, 0.501-1 and 1> mm at different stations throughout the course of the change were significant, but their values did not differ significantly between stations ( p> 0.05). During the study,number 565902 of total Macrobenthic isolates what belonging to 22 species of 9 families including Oligochaeta, Polychaeta, Crustacea and Bivalvia. Five genera and species of Polychaeta identified. Crustaceans with 16 species had the highest number of species than other species. In this category, seven species of the Gamaridae family were identified, from the family of Haustoriidae and Corophiidae, each of which was 1 species, 5 species of the family Pseudocumidae and 1 species of the family Balanidae and Cardiidae species, and 1 genus and species from the class Bivalvia what belonged to the family Cardiidae was.The highest frequency of Macrobenthos belonged to the Polychaeta up to 69%, and among the families 51% belonged to the spionidae family. The average total density of Macrobenthos at different stations was varied and its frequency was higher at stations with a depth of 10 meters from larger values than stations with an average of 5 meters. The average of the Invertebrates Macrobenthos of was at stations up to 5 meters in excess of one thousand, stations with a distance of 10 meters more than two thousand, and station 8 (one station with a depth of 10 meters) was more than three thousand.The average total density of Macrobenthos at stations with a depth of 5 meters with a maximum of 10 meters depth was significant (P <0.05). There was a significant difference between Shanan Diversity index between station 8 and stations 1, 2, 3, 4 and 5 (P <0.05), so that Station 8 with a depth of 10 meters and Station 4 with a depth of 5 meters were respectively the minimum and maximum had a lot of value. The species 23 of fish were caught that two species of Rutilus kutum and Liza aurata dominated. In the present study, the Rutilus kutum of the Caspian Sea was the most frequent in catches of 73.05% and the species Liza aurata accounted for a total of 24.67% of the total catch and was in second place (Figure 8-3). Therefore, due to the combination of invertebrates Macrobenthic and the reduction of Bivalvia in the Goharbaran region and in the Caspian Sea ecosystem, this important bait Food is not enough for the Caspian Sea fish stocks.

بزرگ بي مهرگان كفزي , تنوع , پراكنش , فراواني , صيد , ماهي سفيد دريا خزر , مواد آلي

تهران موسسه تحقيقات علوم شيلاتي كشور

جدول، نمودار (بخشي رنگي)

موسسه تحقيقات علوم شيلاتي كشور 54434

ص. ع. به انگليسي: Mahdi Naderijolodar. Study on relationship between Macrobenthic's biomass, distribution, and abundance with fishing Kutum (Rutilus kutum) in the Southeasthern of the Caspian Sea (Mazandaran-Gohrabaran) , [همكاران طرح] عبداله هاشميان، غلامرضا سالاروند، علي دشتي، محمد كاردر رستمي، فيروز صفري، عباس شيخ‌الاسلامي، فرزاد الياسي، حميدرضا محمودي، فرامرز لالويي، علي اصغر جانبار، فرخ پرافكنده حقيقي، محمد بينايي، محمدعلي افرائي بندپي، فرشته اسلامي، علي رضايي نصرآبادي , كتابنامه: ص. 40- 44

لاروبي (زيست‌شناسي) , ماكروبنتوزها , بن زيان , بوم ‌شناسي دريايي , بن زيان -- درياي خزر , ماهي سفيد , Benthos

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