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Table 3. Num<strong>be</strong>r <strong>of</strong> <strong>amphibia</strong>n <strong>species</strong> within each <strong>of</strong> the IUCN Red List categ<strong>or</strong>ies.<br />

Source: IUCN (2007).<br />

IUCN Red<br />

List Categ<strong>or</strong>y<br />

Num<strong>be</strong>r <strong>of</strong><br />

Amphibian <strong>species</strong><br />

CR 441<br />

EN 737<br />

VU 630<br />

NT 369<br />

LC 2277<br />

DD 1426<br />

EW 1<br />

EX 34<br />

Total 5915<br />

The IUCN Red List also provides a classification <strong>of</strong> causes <strong>of</strong> <strong>species</strong> decline. Assess<strong>or</strong>s <strong>are</strong><br />

asked <strong>to</strong> indicate the threats <strong>that</strong> triggered the listing <strong>of</strong> the taxon concerned at the finest level<br />

possible. These threats could <strong>be</strong> in the past and/<strong>or</strong> present and/<strong>or</strong> future, using a timeframe<br />

<strong>of</strong> three generations <strong>or</strong> ten years, whichever is the longer (not exceeding 100 years in the<br />

future).<br />

Threats <strong>are</strong> subdivided in a hierarchical system. F<strong>or</strong> the purposes <strong>of</strong> this rep<strong>or</strong>t, threat<br />

num<strong>be</strong>r 3 (Harvesting) is the most relevant one. It is subdivided in the following way:<br />

3. Harvesting [hunting/gathering]<br />

3.1. Food<br />

3.1.1. Subsistence use/local trade<br />

3.1.2. Sub-national/national trade<br />

3.1.3. Regional/international trade<br />

3.2. Medicine<br />

3.2.1. Subsistence use/local trade<br />

3.2.2. Sub-national/national trade<br />

3.2.3. Regional/international trade<br />

3.3. Fuel<br />

3.3.1. Subsistence use/local trade<br />

3.3.2. Sub-national/national trade<br />

3.3.3. Regional/international trade<br />

3.4. Materials<br />

3.4.1. Subsistence use/local trade<br />

3.4.2. Sub-national/national trade<br />

3.4.3. Regional/international trade<br />

3.5. Cultural/scientific/leisure activities<br />

3.5.1. Subsistence use/local trade<br />

3.5.2. Sub-national/national trade<br />

3.5.3. Regional/international trade<br />

3.6. Other<br />

3.7. Un<strong>known</strong><br />

1.3. THE IMPACT OF TRADE ON AMPHIBIANS<br />

Although habitat loss and degradation, pollution and the fungal disease chytridiomycosis <strong>are</strong><br />

considered <strong>to</strong> <strong>be</strong> the greatest threats <strong>to</strong> <strong>amphibia</strong>ns at present, over-harvesting and trade have<br />

also <strong>be</strong>en identified as maj<strong>or</strong> causes <strong>of</strong> decline f<strong>or</strong> a num<strong>be</strong>r <strong>of</strong> <strong>species</strong> (Gibbons et al., 2000,<br />

Young et al., 2004; Gascon et al., 2007; IUCN et al., 2007).<br />

6

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