. Closer examination of several proposed species highlight NMFS’ inconsistent application of the distribution scale. For example, NMFS categorized Acropora jacquelieae as “narrow” with justification that the species’ distribution is “limited to part of the Coral Triangle”. However, the species map used in NMFS’ SRR indicates that the species is distributed throughout most of the Coral Triangle. Veron’s updated map confirms that the species is distributed throughout the Coral Triangle and occurs in 17 ecoregions, similar to the number of ecoregions within the Coral Triangle boundary.
. Similarly, NMFS categorized Caulastrea echinulata as “narrow” indicating that its distribution is“limited to the Coral Triangle”. However, maps used in the SRR show that the species is distributed throughout and extending beyond the Coral Triangle. Veron’s updated map shows a similar distribution of the species range extending over 27 ecoregions including all of the Coral Triangle and out to southern Japan, northern Australia, Fiji and Sumatra. The designation of Caulastrea echinulata as having a narrow distribution is contrary to NMFS’ designation of Acropora tenella as having a “moderate” distribution despite the latter having a very similar range, described by NMFS as “somewhat broadly distributed latitudinally (Japan to Indonesia) and longitudinally (Sumatra to Fiji)”6 and covering a slightly smaller number of ecoregions (24 ecoregions) than the former.
. The inconsistencies likely resulted from the use of older distribution maps and the lack of quantitative measures of distribution available to NMFS at the time the proposed rule was drafted. NMFS’s distribution categories can be reassigned more objectively using Veron’s measure of distribution in terms of the number of ecoregions (Table 3). Given that the Coral Triangle contains 16 ecoregions and a “narrow” distribution is restricted to a portion of the Coral Triangle, species occurring in 10 or less ecoregions could be assigned to this category. Similarly, given that a species distributed throughout the Coral Triangle is to be rated as “moderate”, 11-20 ecoregions could be assigned to this category. Species occurring in 21 or more ecoregions would therefore be assigned to the “wide” category. Using this revised category, most (85.5%) of the Indo-Pacific species proposed for ESA listing are classified as having wide distributions, whereas only two species are assigned to the narrow distribution category.