魚類學相關名詞中英對照
名詞 定義 
vulnerable 1) that part of a population likely to be captured by a particular gear, 2)in the IUCN Criteria for threatened species, a taxon is Vulnerable when it is not Critically Endangered or Endangered but is facing a high risk of extinction in the wild in the medium-term future, as defined by any of the following criteria (A to E): A. Population reduction in the form of either of the following: 1. An observed, estimated, inferred or suspected reduction of at least 20% over the least 10 years or three generations, whichever is the longer, based on (and specifying) any of the following: a) direct observation, b) an index of abundance appropriate for the taxon, c) a decline in area of occupancy, extent of occurrence and/or quality of habitat, d) actual or potential levels of exploitation, e) the effects of introduced taxa, hybridization, pathogens, pollutants, competitors or parasites. 2. A reduction of at least 20%, projected or suspected to be met within the next ten years or three generations, whichever is the longer, based on (and specifying) any of (b), (c), (d) or (e) above. B. Extent of occurrence estimated to be less than 20,000 km2 or area of occupancy estimated to be less than 2000 km2, and estimates indicating any two of the following: 1. Severely fragmented or known to exist at no more than ten locations. 2. Continuing decline, inferred, observed or projected, in any of the following: a) extent of occurrence, b) area of occupancy, c) area, extent and/or quality of habitat, d) number of locations or subpopulations, e) number of mature individuals. 3. Extreme fluctuations in any of the following: a) extent of occurrence, b) area of occupancy, c) number of locations or subpopulations, d) number of mature individuals. C. Population estimated to number less than 10,000 mature individuals and either: 1. An estimated continuing decline of at least 10% within 10 years or 3 generations, whichever is longer, or 2. A continuing decline, observed, projected, or inferred, in numbers of mature individuals and population structure in the form of either a) severely fragmented (i.e., no subpopulation estimated to contain more than 1,000 mature individuals), b) all individuals are in a single subpopulation. D. Population very small or restricted in the form of either of the following: 1. Population estimated to number less than 1,000 mature individuals. 2. Population is characterized by an acute restriction in its area of occupancy (typically less than 100 km2) or in the number of locations (typically less than 5). Such a taxon would thus be prone to the effects of human activities) within a very short period of time in an unforeseeable future, and is thus capable of becoming Critically Endangered or even Extinct in a very short period. E. Quantitative analysis showing the probability of extinction in the wild is at least 10% within 100 years.  
易危的 1)一族群中可能被特定網具捕獲的部份,2)指IUCN受脅物種的定義,一個分類單元是易危的,即旣非極危等級亦非瀕危等級,但於中長期的未來,將在自然環境中面臨滅絕的高風險性,詳細定義如下任一(A to E) :A. 族群依以下任一型式減少:1.根據 a)直接觀察 b)一個分類單元的豐度指標 c)居住地區域、出現範圍及/或棲息地品質縮減 d)實際的或可能的環境利用程度 e)新引入的分類單元、雜交、病原體、污染、競爭者或寄生者所產生的影響,因此觀察到、估計、推斷或者懷疑十年或三代以來(無論哪個較長)物種已減少至少 
※中文內容系使用機器由英文內容翻譯。