Silhouettea flavoventrisSilhouettea flavoventris

Conservation Actions

The species has not been recorded from the lake for over 30 years. Further survey work is needed to assess whether this species still exists or has disappeared from Taal Lake.

Location Information

This species is known only from its type locality in Taal Lake, Luzon, Philippines (Kottelat 2013, Herre 1927). Taal Lake has an estimated maximum depth of 180 m, an average depth of 65 m (Mutia et al. 2018), a surface area of 234 km² (Mutia 2015, ILEC 2020), and an altitude of 2.5 m above sea level (Papa and Zafaralla 2011). If still extant, this species would have an extent of occurrence (EOO) of 298 km² and area of occupancy (AOO) of 272 km².

 

Geographic Range

Possibly Extinct

Philippines

Population Information

This species was described based on 37 specimens (25-37 mm long) collected in Taal Lake. This species has not been recorded from the lake despite numerous surveys conducted since 1990s.

Threats

Taal Lake is faced with various threats that impact its biodiversity and habitats. These threats include overexploitation, habitat degradation and destruction, pollution, invasive alien species, proliferation of aquaculture, among others (Santos et al. 2018, Mutia et al. 2018, Mutia 2015, Papa and Safaralla 2011). The proliferation of introduced species leads to predation on or competition with native species, ongoing pollution from aquaculture feeds, domestic wastes and unmanaged tourism on Volcano Island reduces water quality, and expansion of aquaculture facilities destroys habitats and obstructs species movement in the lake (Santos et al. 2018).

IUCN Red List Account Link

Please click here to see the species' IUCN Red List Account page.