Reptilia |
Crocodilia |
Alligatoridae
Environment: milieu / climate zone / ระดับความลึก / distribution range
นิเวศวิทยา
; น้ำจืด; กร่อย. Subtropical; 36°N - 25°N, 106°W - 75°W
Western Central Atlantic: Southeast USA (Alabama, Arkansas, North and South Carolina, Florida, Georgia, Louisiana, Mississippi, Oklahoma, Texas).
Length at first maturity / ขนาด / Weight / Age
วัยเจริญพันธุ์: Lm 1.8 range ? - ? cm Max length : 427 cm TL เพศผู้/กระเทย; (อ้างอิง 80293); 309.9 cm TL (female); น้ำหนักสูงสุดที่มีการรายงาน: 473.10 g (อ้างอิง 80293); น้ำหนักสูงสุดที่มีการรายงาน: 473.10 g
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).
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.
Britton, A. 2002 Alligator mississippiensis (DAUDIN, 1801). Crocodilian Species List. [ttp://www.flmnh.ufl.edu/cnhc/csp_amis.htm#dist, accessed 16 July 2008]. (อ้างอิง 77040)
IUCN Red List Status
(อ้างอิง 130435: Version 2025-1)
CITES status (อ้างอิง 108899)
CMS (อ้างอิง 116361)
Not Evaluated
Threat to humans
Traumatogenic
Human uses
การประมง: การค้า; การเพาะเลี้ยงสัตว์น้ำ: การค้า
FAO - การประมง: landings | FishSource | ทะเลรอบๆเรา
เครื่องมือ
ข้อมูลเพิ่มเติม
Population dynamicsการเจริญเติบโตMax. ages / sizesLength-weight rel.Length-length rel.Length-frequenciesMass conversionอุดมสมบรูณ์ Human RelatedStamps, coins, misc.
แหล่งที่มาจากอินเตอร์เน็ต
Estimates based on models
Fishing Vulnerability
Very high vulnerability (78 of 100).
Price category
Unknown.
