فاکتور‌های محیطی موثر بر انتخاب زیستگاه در سه گونه غضروف ماهیان در آب های ایرانی دریای عمان

نوع مقاله : محیط زیست جانوری

نویسندگان

1 گروه شیلات، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران

2 مرکز تحقیقات شیلاتی آب های دور ، مؤسسه تحقیقات علوم شیلاتی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، چابهار، ایران

3 پژوهشکده اکولوژی خلیج فارس و دریای عمان، موسسه تحقیقات علوم شیلاتی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، بندرعباس، ایران

چکیده

مطالعه حاضر با هدف بررسی اثر عوامل محیطی بر پراکنش و انتخاب زیستگاه در سه گونه هم­زیست از ماهیان غضروفی در دریای­ عمان انجام شد. نمونه ­برداری از مهر­ماه لغایت آبان ماه 1396 از نوار شمالی دریای ­عمان به ­وسیله کشتی ترال کف کلاس فردوس انجام شد. فاکتور‌های محیطی به وسیله CTD ثبت گردید و جهت تعیین فاکتور‌های تاثیرگذار بر انتخاب زیستگاه در گونه‌های مورد مطالعه از مدل GAM استفاده گردید. نتایج نشان داد که عامل محیطی کلروفیل a بیش ­ترین تاثیر در انتخاب زیستگاه در گونه Iago omanensis دارد. در دیگر سو، فراوانی گونه  Rhinobatos annandalei­ ارتباط معنی­ داری با فاکتورهای محیطی اکسیژن محلول، کلروفیل a، درجه حرارت و هدایت الکتریکی داشت. از طرفی، فاکتور‌های محیطی درجه حرارت و هدایت ­الکتریکی بر پراکنش گونه Torpedo sinuspersici نقش مهمی داشتند. نتایج مطالعه حاضر، علم و شناخت را از اکولوژی پراکنش ماهیان غضروفی هم­زیست در دریای ­عمان را بهبود بخشید که می­ تواند در معرفی مکان‌ های با احتمال حضور این گونه‌ ها و تجزیه ­و­ تحلیل مکانی آن‌ ها برای سایر محققین علاقه ­مند و مدیریت شیلاتی در آینده مورد استفاده قرار گیرد.

کلیدواژه‌ها

عنوان مقاله [English]

The effective environmental factors on habitat use of three elasmobranch species in the Iranian waters of Gulf of Oman

نویسندگان [English]

  • Yasin Mir Balouchzehi 1
  • Seyed Ali Akbar Hedayati 1
  • MohammadReza Mirzaei 2
  • Ali Reza Rastgoo 3
1 Department of Fisheries, Faculty of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
2 Offshore fisheries research center, Iranian Fisheries Science Research Institute (IFSRI), Agricultural Research Education and Extension Organization (AREEO), Chabahar, Iran.
3 Persian gulf and Oman Sea Ecological center, Iranian Fisheries Science Research Institute, Agricultural Research Education and Extension Organization (AREEO), Bandar Abbas, Iran
چکیده [English]

Current study was aimed effect of environmental factors on spatial ecology and habitat use of three sympatric elasmobranch species in the Iranian waters of Gulf of Oman. Sampling was carried out from the northern part of Gulf of Oman using bottom trawl of FERDOWS from October to November 2017. Environmental factors were recorded by CTD and the GAM model was used to determine the factors influencing on habitat preferences by species. The results showed that chlorophyll a is the most effective factor in the habitat use of Iago omanensis. On the other hand, the frequency of Rhinobatos annandalei had a significant correlation with the dissolved oxygen, chlorophyll a, temperature and electrical conductivity. Also, temperature and electrical conductivity had the most important role on the spatial ecology of Torpedo sinuspersici. The results of this study improve our knowledge and understanding of the ecology of the distribution of sympatric elasmobranch species in the Gulf of Oman, which can be used to introduce locations with the probability of these species and their spatial analysis for other interested researchers and future fishery management.

کلیدواژه‌ها [English]

  • Elasmobranch
  • Indicator species
  • Habitat use
  • Environmental factors
  • Gulf of Oman

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فصلنامه محیط زیست جانوری
دوره 12، شماره 1
فروردین 1399
صفحه 165-172

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