DistributionRead full entry
Only described as a species in 2009, A. luzonensis appears to have a limited range with specimens found on the Philippine island of Luzon (specifically the upper reaches of the Pinacanauan River system, a tributary of the Cagayan River) and rarely in Mindanao (Watanabe et al. 2009, Han et al. 2012 (glass eels only)). This species may also be found on other islands in the Philippines, although at the time of the assessment this remains unconfirmed and it is thought that the geographic distribution is very small (S. Watanabe 2014, pers. comm.). Glass eel monitoring, conducted in recent years throughout the Philippines, have shown recruitment of this species is almost exclusively isolated to the Cagayan River system, with growth habitat within this system more specific still, suggesting a severely limited range (K. Tsukamoto, unpub. data). Some studies suggest that this species could potentially have a broader range than currently thought extending into adjacent areas such as Taiwan but these appear to be vagrant individuals and due to morphological similarities with A. celebesensis and A. interioris molecular techniques would be required to determine the regular occurrence of this species in other areas (Minegishi et al. 2009, Leander et al. 2012). Clearly more data are required to fully determine the extent of range in this population or indeed whether this species occurs as separate subpopulations elsewhere.