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Charadriiformes |
Laridae
Environment: milieu / climate zone / depth range / distribution range
Ecologia
. Tropical; 33°N - 37°S, 104°E - 12°E
Indo-Pacific and Atlantic Ocean.
Length at first maturity / Size / Peso / Age
Maturity: Lm ?  range ? - ? cm Max length : 39.0 cm TL maschio/sesso non determinato; (Ref. 8812); Peso massimo pubblicato: 144.00 g (Ref. 356)
Culmen: 3.72 cm; tarsus: 2.5 cm; wing: 23.5 cm.
Total Length: 35 to 39 cm; Wingspan: 66 (Ref. 8812) to 76 cm (Refs. 84934, 91362). Total population is over 200,000 pairs (Ref. 84934). Coastal to <10 km offshore (Ref. 356). Found on coastal rock, and over sea (Ref. 83946). Breeds annually in dense colonies, preferably in bushes and trees in Atlantic and Pacific Oceans (Ref. 84934). They are double-brooded. When there is danger, alarm calls are given by adults and chicks respond by crouching in place (Ref. 87784). Highly pelagic. Typically feeds far out at sea in large, gregarious flocks over shoals of predatory fish (Ref. 91362). Exhibits dipping and surface-seizing foraging behavior (Ref. 356). Feed mainly by dipping, hovering and picking from or just below the surface of the water. Also, shallow-plunging (Ref. 126735).
Life cycle and mating behavior
Maturità | Riproduzione | Deposizione | Uova | Fecundity | Larve
Lusk, M.R., P. Bruner and C. Kessler. 2000. (Ref. 5591)
IUCN Red List Status (Ref. 130435)
CITES status (Ref. 108899)
Not Evaluated
Not Evaluated
Threat to humans
Human uses
| FishSource |
Strumenti
Fonti Internet
Estimates based on models
Preferred temperature
(Ref.
115969): 24.2 - 29.3, mean 28.2 (based on 2178 cells).
Resilienza
Alto, tempo minimo di raddoppiamento della popolazione meno di 15 mesi (K=42.36).
Vulnerability
Low to moderate vulnerability (29 of 100).
Price category
Unknown.