بررسی جمعیت عقاب های صحرایی (Aquila nipalensis) و شاهی (Aquila heliaca) زمستان گذران در اطراف کشتارگاه و سایت زباله شهر یاسوج از پاییز 1394 تا زمستان 1395

نوع مقاله : بوم شناسی

نویسندگان

1 گروه زیست شناسی، دانشگاه یاسوج، کد پستی: 7591874934

2 اداره کل حفاظت محیط زیست استان گیلان

چکیده

کشتارگاه و سایت زباله شهر یاسوج در مجاورت یکدیگر و در 12 کیلومتری جنوب شهر یاسوج قرار دارند. در طی دو سال (1394 و 1395)، از اوایل آبان ماه تا اواخر اسفند، پرندگان شکاری این منطقه مورد شمارش و بررسی قرار گرفت. نتایج این بررسی­ها نشان داد که در پاییز و زمستان سال 1394 حدود 130-120 عدد پرنده شکاری از خانواده عقاب­ها و در سال 1395 حدود 125-115 عدد از همین خانواده در سایت زباله و کشتارگاه یاسوج حضور داشتند. از این تعداد در سال 1394، 84 عدد عقاب صحرایی و شش عدد عقاب شاهی و در سال 1395، 79 عدد عقاب صحرایی و 10 عدد عقاب شاهی شمارش گردید. در سال اول، 19/05% عقاب­های صحرایی، بالغ بودند و 33/33% آ­ن­ها 5-4 ساله و 47/62% آن­ها 3-2 ساله بودند. هم­چنین 83/33% از عقاب­های شاهی، نابالغ بودند. در سال دوم، 21/53% عقاب­های صحرایی، بالغ بودند و 36/70% آن­ها 5-4 ساله و 41/77% آن­ها 3-2 ساله بودند. در مورد عقاب­های شاهی نیز در سال دوم، باز هم جمعیت افراد بالغ بسیار کم­تر بود (20% کل جمعیت عقاب­های شاهی)، ولی اغلب افراد شمارش شده را نابالغ­ها تشکیل می­دادند. در طی دو سال مطالعه نیز، 20/3% عقاب­های صحرایی بررسی شده، بالغ و بقیه نابالغ بودند و در مورد عقاب شاهی نیز، 18/43% جمعیت، بالغ بودند. هم­چنین اوج زمان حضور عقاب­های مهاجر در این منطقه دی و بهمن ماه بوده است. در مطالعه­ حاضر عقاب شاهی جمعیت بسیار کم­تری نسبت به عقاب صحرایی داشت.

کلیدواژه‌ها


عنوان مقاله [English]

Population survey of wintering Steppe (Aquila nipalensis) and Imperial Eagles (Aquila heliaca) around slaughterhouse and landfill site of Yasouj city from fall 2014 to winter 2017

نویسندگان [English]

  • Arya Shafaeipour 1
  • Behzad Fathinia 1
  • Fatemeh Khanjani 2
1 Department of Biology, Yasouj University, Zip Code: 7591874934
2 General Directorate of Environmental Protection of Guilan Province
چکیده [English]

Slaughterhouse and garbage site of Yasouj city are adjacent to each other, located at 12 km south of the city. From early November 2014 to late March 2017, we studied and counted eagles in this area. Our survey showed that from fall 2014 to spring 2015, 120-130 eagles and during fall 2016 to spring 2017, about 115-125 eagles were present at slaughterhouse and garbage site of Yasouj. Some 84 Steppe Eagles and six Imperial Eagles were counted from fall 2014 to spring 2015, and 79 Steppe Eagles and 10 Imperial Eagles from fall 2016 to spring 2017. From fall 2014 to spring 2015, 19.05% of Steppe Eagles were adult, 33.3% were 4-5 year-olds, and 47.6% were 2-3 year-olds, and 83.3% of Imperial Eagles were immature. From fall 2016 to spring 2017, 21.5% of Steppe Eagles were adult, 36.7% were 4-5 year-olds, and 41.8% were 2-3 year-olds. Regarding the Imperial Eagle, from fall 2016 to spring 2017, the number of adults was very low (20% of the total population of Imperial Eagles) but the majority of the individuals were immature and subadult. Also, during the two-year study, only 20.3% of Steppe Eagles were adult while the remainder were immature and subadult. About the Imperial Eagles, only 18.4% of the individuals were adult. The peak of eagles presence was January and February in this area. Low global population of the Imperial Eagle was also confirmed in the current study, with very low population counted compared to Steppe Eagle.
 

کلیدواژه‌ها [English]

  • Steppe Eagle
  • (Aquila nipalensis)
  • Imperial Eagle
  • (Aquila heliaca)
  • Age Pyramid
  • Population
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