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Alligator mississippiensis (Daudin, 1801)
American alligator
را بارگذاری کني تصاوير
تصوير گوگل |
No photo available for this species.No drawings available for Alligatoridae.
تصوير گوگل |
No photo available for this species.
رده بندی / Names اسامي عام | مترادف | CoL | ITIS | WoRMS
Reptilia | Crocodilia | Alligatoridae
Environment: milieu / climate zone / تغييرات عمق / distribution range بوم شناسي
; آب شيرين; لب شور. Subtropical; 36°N - 25°N, 106°W - 75°W
Distribution كشورها | مناطق سازمان خوار و بار جهاني (FAO) | Ecosystems | ظهور | معرفي
Western Central Atlantic: Southeast USA (Alabama, Arkansas, North and South Carolina, Florida, Georgia, Louisiana, Mississippi, Oklahoma, Texas).
Length at first maturity / Size / Weight / سن
بلوغ: Lm 1.8 range ? - ? cm Max length : 427 cm TL جنس نر / بدون خواص جنسي; (مرجع 80293); 309.9 cm TL (female); بيشينه وزن گزارش شده: 473.10 g (مرجع 80293); بيشينه وزن گزارش شده: 473.10 g
توصيف مختصر ريخت شناسي
Broad snout with bony nasal bridge; edge of upper jaw overlaps with teeth of lower jaw when mouth closed. Juveniles are miniature adults with bright yellow cross-bands on black skin; yellow bands turn to olive brown. Skin around jaws, neck and belly are creamy white. Pale ventral surface, scales near tail black. Bony plates on scales of belly. Olive green eyes (Ref. 77040). Sexual dimorphism visible only on juveniles and adults greater than 0.6 m.
Can tolerate saline waters for short periods of time. Construct burrows used for shelter and hibernation at low temperatures. Construct alligator holes for refuge during dry periods. May cross land when alligator holes dry out to find another body of water. Opportunistic feeders. Juveniles feed on small invertebrates (insects, frogs) and small fish. Dietary range increases as size increases and larger adults consume all aquatic and terrestrial prey (fish, turtles, small mammals, birds, reptiles including small alligators). May also scavenge. Feeding activity related to temperature, decreasing at temperatures below 20 to 23°C. Ectothermic. Home range size of adult males is 2000 acres (Ref. 80292).
Life cycle and mating behavior بلوغ | تولید مثل | تخم ریزی | Eggs | Fecundity | Larvae
Courtship rituals involve rapid head-slapping on water surface, body postures reinforced with odor from musk glands. Courtship synchronizes spermatogenesis and ovulation. Female creates the nest, often the same site each year and near an 'alligator hole' from freshly torn up vegetation and mud (usually at the start of summer) above the water level. Female lays 20-50 eggs (average of 40-45), remains near the nest until eggs hatch, sometimes breaking the egg to help hatchlings out. She then takes 8-10 hatchlings in her mouth and carries them to the water encouraging them to swim out. Juveniles form pods which often stay close to the mother for a period of up to 2 years.
مآخذ اصلی
مراجع | هماهنگ كننده | همكاران
Britton, A. 2002. (مرجع 77040)
وضعيت در فهرست قرمز IUCN
(مرجع 130435: Version 2024-2)
وضعيت از نظر سايتس (مرجع 108899)
Appendix II: International trade monitored
CMS (مرجع 116361)
Not Evaluated
خطر برای انسان ها
Traumatogenic
استفاده انسانی
ماهي گيري – شيلات: تجاري; آبزي پروري: تجاري
FAO - ماهي گيري – شيلات: landings | FishSource | Sea Around Us
ابزارها
اطلاعات بيشتر
Trophic Ecology
بوم شناسي
Population dynamics
Distribution
Physiology
Oxygen consumption
منابع اينترنتي
BHL | BOLD Systems | CISTI | DiscoverLife | FAO(ماهي گيري – شيلات: ; publication : search) | Fishipedia | GenBank (ژنوم, نوکلئوتيد) | GloBI | Gomexsi | Google Books | Google Scholar | Google | PubMed | Tree of Life | Wikipedia (برو, جستجو) | Zoological Record
Estimates based on models
طبقه قيمت
(مرجع 80766):
Unknown.