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نوشته شده در دوشنبه دهم تیر 1387ساعت 14:42 توسط مجتبی رحیمی
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There is one recognized species which usually builds single or a few exposed combs on high tree limbs, on cliffs, and sometimes on buildings. They can be very fierce. Periodically robbed of their honey by human "honey hunters", colonies are easily capable of stinging a human being to death when provoked. Their origin as a distinct lineage is only slightly more recent than that of the dwarf honey bees.[citation needed] ادامه مطلب |
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نوشته شده در دوشنبه دهم تیر 1387ساعت 14:38 توسط مجتبی رحیمی
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نوشته شده در دوشنبه دهم تیر 1387ساعت 14:35 توسط مجتبی رحیمی
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Honey bees as a group appear to have their center of origin in South and Southeast Asia (including the Philippines), as all but one of the extant species are native to that region, notably the most plesiomorphic living species (Apis florea and A. andreniformis). [1] The first Apis bees appear in the fossil record at the Eocene-Oligocene boundary, in European deposits dating about 35 million years ago. The origin of these prehistoric honey bees does not necessarily indicate that Europe is where the genus originated, only that it occurred there at that time. There are few known fossil deposits in the suspected region of honeybee origin, and fewer still have been thoroughly studied; moreover, the tropical conditions are generally not ideal for fossilization of small land animals. The close relatives of modern honey bees - e.g. bumblebees and stingless bees - are also social to some degree, and thus social behavior seems a plesiomorphic trait that predates the origin of the genus. Among the extant members of Apis, the more basal species make single, exposed combs, while the more recently-evolved species nest in cavities and have multiple combs, which has greatly facilitated their domestication. Most species have historically been cultured or at least exploited for honey and beeswax by humans indigenous to their native ranges. Only two of these species have been truly domesticated, one (Apis mellifera) at least since the time of the building of the Egyptian pyramids, and only that species has been moved extensively beyond its native range. Today's honey bees constitute three clades (Engel 1999, Arias & Sheppard 2005 |
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نوشته شده در دوشنبه دهم تیر 1387ساعت 14:33 توسط مجتبی رحیمی
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بال زنبورها به هنگام پرواز بیش از 200 بار در ثانیه به هم میخورد. علت وزوز آنها هم همین حرکت سریع بالهایشان است. خیلیها گمان میکنند زنبورها با وزوز کردن با هم حرف میزنند اما زنبورها قادر به شنیدن نیستند. در واقع آنها اصلا گوش ندارند. آنها با احساس لرزش شاخکها یا پاها با هم ارتباط برقرار میکنند. نحوه برقراری ارتباط زنبورها هنگامی که مشغول "رقص دم جنبان" هستند به خوبی آشکار میشود. "رقص دم جنبان" اجرای حرکات موزوئی است که در آن زنبور ضمن جنباندن دم خود ، بالهایش را نیز بسیار سریع به هم میزند و صدای وزوز مشخص ایجاد میکند. (جواب سوال خانم ندا ملکی از اصفهان)
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نوشته شده در شنبه هشتم تیر 1387ساعت 11:30 توسط مجتبی رحیمی
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