Aves |
Charadriiformes |
Laridae
Environment: milieu / climate zone / تغييرات عمق / distribution range
بوم شناسي
سطح زی. Tropical; 35°N - 40°S (مرجع 96995)
Indo-Pacific, Atlantic Ocean and the Mediterranean.
Length at first maturity / Size / Weight / سن
بلوغ: Lm ?  range ? - ? cm Max length : 45.0 cm TL جنس نر / بدون خواص جنسي; (مرجع 8812); بيشينه وزن گزارش شده: 180.00 g (مرجع 356); بيشينه سن گزارش شده: 36 سال ها (مرجع 8545)
Culmen: 4.53 cm; tarsus: 2.52 cm; wing: 30.5 cm.
Total Length: 43 to 45 cm; Wingspan: 86 to 94 cm (Ref. 8812). Pelagic (Ref. 122680). Coastal and oceanic islands, and offshore (Ref. 356). In beach, shoreline and pelagic zone (Ref. 116102). Pantropic, pelagic species. Strong flyer, high over the ocean. Forms large breeding colonies on tropical and subtropical islands on sand, coral and rock, with or without vegetation. Forages in flocks (Ref. 84934). Remains 10 to 20 m above water then descends and wheels in circles before grabbing its food (Ref. 356). Feeding techniques: air dipping and contact dipping from the water surface (Refs. 356, 96995). Diet consists of squid, goatfish, flyingfish and mackerel scad (Ref. 122680). Does not plunge dive and rarely stays long in water as plumage is not waterproof. Colonies may suffer heavy losses of eggs by predatory cats (Ref. 84934).
Life cycle and mating behavior
بلوغ | تولید مثل | تخم ریزی | Eggs | Fecundity | Larvae
Birds go to the island at night, 3 months before laying. Hatching peaks in the middle of April. Most fledging shows in June and leave the island at the beginning of August while the adults leave at the end of August (Ref. 96995).
مآخذ اصلی
مراجع | هماهنگ كننده | همكاران
Lepage, D. 2007 Avibase -the World Bird Database. http://www.bsc-eoc.org/avibase/avibase.jsp [accessed 09/07/2007]. (مرجع 7816)
وضعيت در فهرست قرمز IUCN
(مرجع 130435: Version 2025-1)
وضعيت از نظر سايتس (مرجع 108899)
Not Evaluated
Not Evaluated
خطر برای انسان ها
استفاده انسانی
| FishSource |
ابزارها
اطلاعات بيشتر
PhysiologyOxygen consumption
Human RelatedStamps, coins, misc.
منابع اينترنتي
Estimates based on models
Preferred temperature
(Ref.
115969): 23.3 - 29.2, mean 27.9 (based on 4066 cells).
جهندگی
زياد, كمينه زمان لازم براي دو برابر شدن جمعيت ، كمتر از 15 ماه (K=5.28; tm=3; tmax=36).
Fishing Vulnerability
High vulnerability (63 of 100).
طبقه قيمت
Unknown.