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Gygis alba   (Sparrman, 1786)

White tern
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Classification / Names Common names | Synonyms | CoL | ITIS | WoRMS

Aves | Charadriiformes | Laridae

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

Others.  Tropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions

Atlantic Ocean and Indo-Pacific. Gygis alba candida: Polynesia along the Australian coasts northwards to Torres Straits and Malay Archipelago to India (Ref. 89295).

Length at first maturity / Size / Weight / Age

Maturity: Lm ?  range ? - ? cm Max length : 33.0 cm TL male/unsexed; (Ref. 8812); max. published weight: 160.00 g (Ref. 356)

Short description Morphology

Culmen: 3.2 cm; tarsus: 1.44 cm; wing: 25.2 cm.

Biology     Glossary (e.g. epibenthic)

Total Length: 28 to 33 cm; Wingspan: 70 to 87 cm (Ref. 8812). Coastal (Ref. 356). Exclusively marine. Breeds at many tropical and subtropical oceanic islands (Ref. 91362). Solitary breeder; uniquely, lays a single egg on tree branch without any nest. Inquisitive; hovers around nest site in presence of human intruders (Ref. 91362). Exhibits dipping behavior (Ref. 356) or surface diving (Ref. 122680). Feeds mainly on fish (Refs. 81748, 122680) driven to the surface by large, predatory fish (Ref. 122680). Diet consists mostly of juvenile goatfish and flying fish (Ref. 122680).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference References | Coordinator | Collaborators

Stiles, F.G. 1984. (Ref. 5856)

IUCN Red List Status (Ref. 124695)

  Least Concern (LC) ; Date assessed: 08 August 2018

CITES status (Ref. 108899)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Human uses


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More information

Common names
Synonyms
Predators
Reproduction
Maturity
Spawning
Fecundity
Eggs
Egg development
Age/Size
Growth
Length-weight
Length-length
Morphology
Larvae
Abundance
References
Mass conversion

Internet sources

BHL | BOLD Systems | CISTI | DiscoverLife | FAO(Publication : search) | GenBank (genome, nucleotide) | GloBI | Gomexsi | Google Books | Google Scholar | Google | ispecies | PubMed | Tree of Life | Wikipedia (Go, Search) | Zoological Record

Estimates of some properties based on models

Preferred temperature (Ref. 115969): 24.2 - 29.3, mean 27.9 (based on 1736 cells).
Vulnerability (Ref. 71543)
Low vulnerability (23 of 100)
Price category (Ref. 80766)
Unknown