Alpine newt
The alpine newt (Ichthyosaura alpestris) is an amphibian. It is a Salamander (Urodela or Caudata). The alpine newt is one of five newts in Germany.
| Alpine newt | |
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| Triturus alpestris | |
Description
Early in the year, alpine newts mate. During that time, the males have a blue color on their sides but not too much to overlap their white-black-spotted flank. Their belly is a bright orange. The females are more camouflaged to their marshy environment. They are a mottled brown with barely visible, black spots.
The biggest of the males can reach up to nine, and the females up to twelve centimeters in length. After the mating season, they return to their natural color of the mottled brown.
Life and habitat
The alpine newt typically lives in forests with good access to water in hilly to mountainous regions. They are mostly absent in forest-poor areas. They often occur in thick deciduous forests, as well as parland and natural gardens. Outside the spawning season, the Alpine Newt is a land animal. During the day it stays in all kinds of undergrowth, but during the mating season in cool water (forest pools, artificial pools). After the adults come out of winter dormancy, the alpine newts immediately take themselves to the spawning pools.
Location
The spread of the alpine newt is constricted to Central Europe and parts of mountainous Southern Europe as well as an isolated area on the Iberian Peninsula.
There is also some introduced wild populations in the UK
Endangerment
After a steep decrease in the alpine newt population in the 1960s-70s, they have recovered their numbers a bit. Surveillance in the surrounding area of Cologne (approximately 50m above sea level) showed an increase in alpine newt numbers, but the numbers of newts in breeding pools seemed to decline. In home gardens, newts are settling in pools in which there may be a high reproduction rate. If fish are in these ponds, the population will be completely wiped out. However, a small pool of 150 litres volume had more than 60 alpine newt tadpoles of different sizes at the beginning of July 2003. They were likely spawned from just one female.[2]
Taxonomy
The alpine newt has been usually placed into the Triturus genus. García-París | display-authors = etal[3] split the genus Triturus into three, and placed the alpine newt into its own genus Mesotriton. Also the subspecies T. a. inexpectatus was elevated to species status. However this split has not been completely accepted yet. Originally 9 subspecies of the alpine newt were recognized.
Alpine Newt Media
Dorsal view of a male (bright blue, left) courting a female (mottled grey, right) in a shallow pond
Throat and belly are orange and usually unspotted.
Biofluorescence in an alpine newt
Shady ponds surrounded by forest (here in the Vosges, France) are typical breeding sites for alpine newts.
Juvenile eft hibernating in dead wood
Defensive position, with tail curled up
Stages of courtship display, filmed in captivity[4]
Egg with larva just before hatching
Larva with fore- and hindlegs developed
Paedomorphic adult of subspecies I. a. apuana
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References
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Wikispecies has information on: Triturus alpestris. |
- ↑ Arntzen, J.W. (2006). Triturus alpestris. 2008 IUCN Red List of Threatened Species. IUCN 2008. Retrieved on 2009-02-03.
- ↑ APl1800 Archived 2007-03-11 at the Wayback Machine H.J. Anton, Breeding productivity of newts in small garden ponds
- ↑ García-París M; A. Montori and P. Herrero 2004. Amphibia: Lissamphibia. Fauna Iberica 24. Madrid: Museo Nacional de Ciencias Naturales and Consejo Superior de Investigaciones Científicas.
- ↑ Cite error: Invalid
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