Siredon dumerilii Dugès, , Naturaleza, 1: Syntypes: Not stated, but presumably originally in MDUG; including USNM (according to. Locally known as “achoques,” the Lake Pátzcuaro salamander (Ambystoma dumerilii) is an amphibian that lives its entire life in freshwater. Siredon dumerilii Dugès, , Bathysiredon dumerilii (Dugès, ), Amblystoma dumerili Cope, , Ambystoma (bathysiredon) dumerilii Tihen,

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Like its relative, the axolotl, this salamander lives in neoteny, which means it lives its entire life, appearing as larvae. These salamanders never metamorphose and, therefore, never go ashore to live on land. Because of water pollution and invasive fish species, the future of this highly specialized species is very uncertain. Here they have reproduced, are maturing and can thus contribute to the survival of the species.

In the mabystoma, ambystomatids generally exhibit both aquatic neotenic larval and terrestrial metamorphosed stages. Neotenic larvae are aquatic and permanently juvenile forms with external, feathery gills.

Terrestrial metamorphosed are ground dwelling, fully developed adult forms with reduced gills. This means that this ambystlma is in a permanent larval stage and is capable of reproduction as such.

If dehydration or other threatening circumstances occur, this salamander cannot metamorphose and move onto land, as we see with other related species. This highly specialized species can reach a length of up to 35 cm.


In the literature, the maximum length is often specified as 26 cm, but the salamanders in Turtle Island easily exceed 30 cm in dumerklii. As compared to terrestrial salamanders, A. The massive head is flattened, enabling the salamander to be an extremely efficient fish hunter. The basic color of the salamander is gray-brown, but they can also have a reddish coloration with strikingly violet external gills.

Lake Patzcuaro salamander

ajbystoma Depending on water temperature, oxygen content and water chemistry, external gills can differ in ambyshoma and branching. The foot pads and toes of wild caught specimens are chocolate brown. The top of their head and body is covered with glands that secrete a milky substance with an unpleasant odor and bitter taste. This liquid is thought to function as a defense mechanism against predators. Up to eggs are laid in water plants or glued onto stones. The eggs are left to fate by the parent animals immediately after spawning.

Lake Pátzcuaro Salamander – TURTLE ISLAND

In the wild, their main food source seems to be the dwarf crayfish Cambarellus patzcuarensiswhich in the pet trade is commonly sold in its orange color morph. Insect larvae and worms are also eagerly consumed. Upon entering a room with an aquarium of A.


Due to its very limited occurrence in only one Mexican highland lake, which has not been designated as a protected area, A. This species was exploited for decades by fishermen for food and medicine for respiratory diseases. Dumeripii is reported that 19 tons were harvested in Sincefishermen have not been able to locate them, thus their number is virtually no longer detectable.

The fishermen we interviewed have not caught a single salamander in recent years! The increasing eutrophication causes an annual algae bloom. Additionally, predators, such as the invasive Tilapia sp.

In the main entrance hall of the Basilica, there is a large painting depicting their reproduction cycle in the lake, their husbandry and the production of medicine. Currently, Turtle Island is breeding two unrelated breeding lines and will be able to distribute offspring to collaborating institutions very soon. With this conservation breeding, we hope to contribute to the continued existence of this remarkable and unique salamander.

I nsight into the project:. Things you should know about this project: I nsight into the project: April – 3: August –

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