data deficient

[ dey-tuhdi-fish-uhnt, dat-uh, dah-tuh ]
/ ˈdeɪ tə dɪˌfɪʃ ənt, ˈdæt ə, ˈdɑ tə /

adjective Biology, Ecology.

(of a plant or animal species) lacking a properly assessed conservation status due to insufficient information on population and distribution, as categorized by the IUCN Red List: We are tracking the populations of data deficient fishes and mollusks.Abbreviation: DD

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