نوع تنقصه البيانات

وضع الحفاظ
by IUCN Red List category
وضع الحفاظ by IUCN Red List category
الانقراض
منقرض; منقرض في الخلاء;	(list); (list);
مهدد
خطر انقراض ماحق; مهدد بالانقراض Threatened; عرضة للانقراض Vulnerable;	(list); (list); (list);
Lower Risk
Near Threatened (NT); Conservation Dependent (CD); Least Concern (LC);	(list); (list);
	تصنيفات أخرى
Data Deficient (DD); Not Evaluated (NE);	(list);
	مواضيع ذات صلة International Union for; Conservation of Nature (IUCN); IUCN Red List; NatureServe status; Lists of organisms by population;
	; Comparison of Red list classes above; and NatureServe status below;
	v; t; e;

A data deficient (DD) species is one which has been categorized by the International Union for Conservation of Nature (IUCN) as offering insufficient information for a proper assessment of conservation.

Qualifications

DD species may have been extensively studied, but in some cases little or no information is available on the abundance and distribution of the species. It can also indicate uncertainty about the taxonomic classification of an organism; for example, the IUCN classifies the orca as "data deficient" because of the likelihood that two or more types of the whale are separate species.^[1]

The orca is an example of a data deficient species.

The IUCN recommends that care be taken to avoid classing species as "data deficient" when the absence of records may indicate dangerously low abundance: "If the range of a taxon is suspected to be relatively circumscribed, if a considerable period of time has elapsed since the last record of the taxon, threatened status may well be justified"^[2] (see also precautionary principle).

References

^ Reeves, R.; Pitman, R. L.; Ford, J. K. B. (2017). "Orcinus orca". IUCN Red List of Threatened Species. 2017 e.T15421A50368125. doi:10.2305/IUCN.UK.2017-3.RLTS.T15421A50368125.en. Retrieved 19 November 2021.
^ "The Categories", in IUCN (1983).

External links

IUCN (2001). "2001 Categories & Criteria (version 3.1)". 2014 IUCN Red List. Retrieved 2014-08-26.

قالب:Threatened species by region

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[1] Reeves, R.; Pitman, R. L.; Ford, J. K. B. (2017). "Orcinus orca". IUCN Red List of Threatened Species. 2017 e.T15421A50368125. doi:10.2305/IUCN.UK.2017-3.RLTS.T15421A50368125.en. Retrieved 19 November 2021.

[2] "The Categories", in IUCN (1983).

[1]

[2]

وضع الحفاظ by IUCN Red List category

الانقراض
منقرض منقرض في الخلاء	(list) (list)
مهدد
خطر انقراض ماحق مهدد بالانقراض Threatened عرضة للانقراض Vulnerable	(list) (list) (list)
Lower Risk
Near Threatened (NT) Conservation Dependent (CD) Least Concern (LC)	(list) (list)
تصنيفات أخرى
Data Deficient (DD) Not Evaluated (NE)	(list)
مواضيع ذات صلة International Union for Conservation of Nature (IUCN) IUCN Red List NatureServe status Lists of organisms by population
Comparison of Red list classes above and NatureServe status below
v t e

Qualifications

See also

References

External links