بخشی از پاورپوینت
--- پاورپوینت شامل تصاویر میباشد ----
اسلاید 1 :
- Scorpions, which are grouped in the phylum Arthropoda .
- scorpion has a flattened elongated body and can easily hide in cracks.
- scorpion has a segmented tail that has a poisonous spike at the end.
اسلاید 2 :
Scorpion stings are a major public health problem in many underdeveloped tropical countries, especially Africa, South India, the Middle East, Mexico, and South Latin America.
The estimated annual number of scorpion stings is 1.2 million.
An estimated 5000 deaths occur annually from scorpion stings worldwide
اسلاید 3 :
Distribution
Scorpions have a world-wide distribution, being found in deserts, grasslands, forests, intertidal zones (coast) and mountains.
اسلاید 4 :
World distribution of scorpions
اسلاید 5 :
Size of scorpions
- The average size of a scorpionid is 3 to 9 cm.
- The largest forms are the African genus Pandinus which reaches 18 cm, and Hadogenessppwhich measures 21 cm long and weighs 32 grams.
- Some Carboniferous scorpions are known to have attained lengths of 44 to 86 cm or even a meter.
اسلاید 6 :
Probable reasons for development of venom in scorpions
1)Food acquisition
A-Venom can be an effective tool for predators.
B-A second advantage of venom is that in many venom, enzymes are a major constituent.
2) Defense
This is in fact is one of the most important property of venom, pain. It is more immediate and the offending animal immediately gets the message and may live to communicate it to others.
اسلاید 7 :
دوره زندگی
- جفت گیری
- بارداری
- زایمان
- پوست اندازی
- تغذیه و شکار
- لانه گزینی
- دوره های فعالیت زیستی
- شکارچی های کژدم
اسلاید 8 :
وضعيت جفت گيري در كژدم ادنتوبوتوس دوريه
اسلاید 9 :
جفت گيري
- جفت گيري معمولا در طول شب و در محيط باز شروع مي گردد.
- نرها پنيس ندارند و اسپرم به كمك اسپرماتوفور منتقل مي شود
اسلاید 10 :
مراحل جفت گیری
- جفت گیری دارای مراحلی است که از طرف نر شروع و با همراهی کامل ماده به پایان می رسد
- از ابتداتا پایان جفت گیری متغییر بوده و از حدود نیم تا یک و نیم ساعت طول مي كشد
