Christmas Island (AU) country information

Common names: [No common name]
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Semiannual breeding cycle: those that fail to breed nest again after 6 months. Peak egg-laying months were in December and June (Ref. 96995). O: Ref. 96695.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/kt.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: King, W.B., 1974
National Database:

Common names from other countries

‘ewa‘ewa, ... more

Classification / Names / Names Namen | Synonyme | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS

> Charadriiformes (Shorebirds) > Laridae ()

Environment: milieu / climate zone / depth range / distribution range Ökologie

Pelagisch. Tropical; 35°N - 40°S (Ref. 96995)

Verbreitung Länder | FAO Gebiete | Ecosystems | Vorkommen | Einführungen

Indo-Pacific, Atlantic Ocean and the Mediterranean.

Length at first maturity / Size / Gewicht / Alter

Maturity: L_m ? range ? - ? cm Max length : 45.0 cm TL Männchen/unbestimmt; (Ref. 8812); max. veröff. Gewicht: 180.00 g (Ref. 356); max. veröff. Alter: 36 Jahre (Ref. 8545)

Kurzbeschreibung Morphologie

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 Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fecundity | Larven

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).

Hauptreferenz Referenzen | Koordinator | Partner

Lepage, D. 2007. (Ref. 7816)

IUCN Rote Liste Status (Ref. 130435)

nicht bedroht (LC) ; Date assessed: 19 February 2020

CITES Status (Ref. 108899)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Nutzung durch Menschen

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FAO Gebiete
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Vorkommen
Einführungen
Stocks
Ökologie
Nahrung
Nahrungsorganismen

Namen
Synonyme
Räuber
Fortpflanzung
Geschlechtsreife
Ablaichen
Fecundity
Eier
Eientwicklung

Alter/Größe
Wachstum
Länge-Gewicht
Länge-Länge
Morphologie
Larven
Dichte

Referenzen
Mass conversion

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Estimates based on models

Preferred temperature (Ref. 115969): 23.3 - 29.2, mean 27.9 (based on 4066 cells).

Widerstandsfähigkeit (Ref. 69278) hoch, Verdopplung der Population dauert weniger als 15 Monate. (K=5.28; tm=3; tmax=36).

Verwundbarkeit (Ref. 71543): Low to moderate vulnerability (35 of 100).

Preiskategorie (Ref. 80766): Unknown.

Onychoprion fuscatus Linnaeus, 1766