Ambystoma rivulare (Taylor, 1940)

Taxonomic Classification

Ambystoma rivulare is a species of mole salamander in the family Ambystomatidae.

Geographic Distribution

It is endemic to Mexico, and most of its population is distributed across the Trans-Mexican Volcanic Belt around central Mexico City.

Occurrence Sites

It can be found in various small or medium-sized ponds and lakes with a wide range of available food, all located at least 2 km apart.

Habitat and Threats

Its natural habitats are subtropical or tropical moist montane forests and rivers, and it is currently threatened by habitat loss.

Post-Metamorphosis Habitat Use

After completing metamorphosis, A. rivulare continues to live in the same river where it hatched.

Larval Diet Composition

The larvae of A. rivulare mainly prey on ostracods, along with some gastropods and a small assortment of other prey items; they keep preying on the same organisms as they grow, giving their overall diet a limited diversity.

Vulnerability from Low Diet Diversity

This low diet diversity leaves A. rivulare in a vulnerable position if environmental changes endanger the local ostracod population in its habitat.

Diet and Body Size Study Findings

A diet study of A. rivulare conducted at the University of Sao Paulo found no relationship between the salamander's size and its diet, which suggests there are not enough larger prey available for larger adult salamanders.

Research Significance

Research on this species, also called the Michoacan Stream Salamander, has important implications for the conservation and long-term survival of these salamanders.