|Copyright: Akif Aykurt (Raptorman)
|Date Taken: 2009-04-25|
|Camera: Canon EOS 40D, Canon EF500/4L IS|
|Exposure: f/4, 1/4000 seconds|
|More Photo Info: [view]|
|Photo Version: Original Version|
|Date Submitted: 2009-04-29 1:07|
|[Note Guidelines] Photographer's Note|
Lat : Microtus socialis
Tur : Tarla faresi
Thanks for exact species name for ; Ahmet ( rousettus ) and Mustafa ( spalaxtr )
These text for " Microtus arvalis " very similiar species with " socialis "
*** Distribution and habitat
The common vole is hardly restricted in means of distribution and habitat and inhabits large areas of Eurasia. As Microtus arvalis followed human civilisation, primary and secondary habitats can be distinguished. The primary habitats are everything but dense forests, such as meadows, heath lands, and fallow land. The secondary habitats are mainly agricultural fields whereby shallow sloped areas are preferred. The natural food of the common vole is grass, but it also feeds on many agricultural crops (within secondary habitats) and here its reproduction is faster than in primary habitats.
Reproduction, demography, and predation
After pregnancy of 16 to 24 days, females give birth to 3 to 8 juveniles, weighing between 1.0 and 3.1 g. Weaning is around the 20th day. Female juveniles can be impregnated from the 13th day after birth. Hence, first birth can be given from the 33rd day. During annual reproduction, which starts in March and ends in October, females usually have three reproductive cycles. The average life span is 4.5 months, which means that most animals die after the last reproduction in October, while the latest offspring in the year survives the winter and starts reproduction the following spring. Weights can reach 51 g in males and 42 g in non-pregnant females. Sex ratio at birth is equal, but becomes female-biased as the animals mature or with increasing population density when the ratio can level off to 3:1 or even 4:1 in favour of females. These ratios depict an intense competition for female mates, which leads to higher mortality and dispersal rates among the males. Population density varies seasonally and exhibits a considerable long-term fluctuation that shows typically three-year or five-year cycles. Densities can range from 100 individuals per ha (very low level) over 500 individuals per ha (medium level) up to 2000 individuals per ha in some years. As reaction females reproduction can decrease or even stop. Not only influenced by population level, reproduction rate can change with the amount and quality of food and light. Self regulation (e.g. decrease of reproduction rate) has been addressed to be a response to increased population densities. However, M. arvalis is one of the main food sources of a considerable number of predators in Central Europe. Buzzard, kestrel, long-eared owl, tawny owl, and barn owl are some of the birds that feed on the common vole and so delimit population sizes. Ground-predators are mainly weasel, stoat, polecat, fox and boar.
Territories and nests
Microtus maintains aboveground runways, which expand like a railway-system through the entire home range. Voles are seldom seen outside these runways, which enable a faster and safer locomotion and easier orientation. The climbing ability of the common vole is very poor. Underground nests are dug 30 to 40 cm deep into the ground and are used for food storage, offspring raising, and as a place for rest and sleep. Nests can be shared and defended by up to five females with juveniles that are related in most cases. Females are territorial and an overlap of occupied areas does not occur. Hence, the number of colonies increases with individual number (i.e. population density). As common voles have a polygynous mating system the males do not maintain territories and move as so-called floaters between several females territories in order to mate as often as possible. They can show overlap in territories. These findings are supported by the different home range sizes of males (1200-1500 m2) and females (300-400 m2) that can decrease in both males and females as population density rises. Another response to population growth is to leave the original habitat and move towards another one. Males predominantly conduct dispersal, being most often caused by the competition for mates.
*** From Wikipedia
SelenE, eng55, skoksalan, goatman04, rousettus, spalaxtr, Noisette, caspian has marked this note useful
Only registered TrekNature members may rate photo notes.
- [2009-04-29 1:30]
Benim saz delicelerinin yemegi pek sirin :o) Guzel goruntulemissin
- [2009-04-29 1:42]
Yırtıcıları bitirdin artık avları ile ilgileniyorsun galiba:)Yan gözle bakışını çok güzel yakalamışsın.
çok çok güzel bir çekim. Kemiricilerde gündüz böyle doğal çekimler zordur, bilirsin. ama bu konuda şanslı olduğunu biliyorum. eline sağlık dostum. şansın hep bol olsun.
tür konusunda, M. arvalis, Erzurum ve Van taraflarında var. bu renklenmesi ve genel görünüşü ile daha çok Microtus socialis gibi duruyor.
sağlıcakla kal, selamlar.
Detaylar ve göz teması çok hoşuma gitti özellikler bıyıklar :))
Doğal ortamında çok net ve güzel bir kare. Ama tür konusunda Ahmet'e katılıyorum. Eline sağlık.
very nice and cute, TFS Ori
perfect scene,beautiful glance and photo
Well done on capturing this very shy creature!
You have very good contrast and color in this shot.
- [2009-04-29 9:30]
Çok farklı ve güzel bir çekim.Kutlarım.
This a great capture of this tiny vole with good details & color. TFS.
- [2009-04-29 10:54]
Nice scene full of good details and color. Well done!! TFS. Carme.
Very cute shot, with a good sharpness. Not easy to do! Congratulations,
what a lovely shot of this cute model, this common vole have a nice face
wonderful lighting and superb sharpness
very well done
Zor bir çekimi güzel ve net yakalamışsın. Tarla farelerinin bu kadar şirin gözükebiliceğini hiç ummazdım. Tebrik ederim. Saygılarımla.