lunes, agosto 02, 2010
sábado, junio 05, 2010
Axolotl
The axolotl (pronounced /ˈæksəlɒtəl/), Ambystoma mexicanum, is the best known of the Mexican neotenic mole salamanders belonging to the Tiger Salamander complex. Larvae of this species fail to undergo metamorphosis, so the adults remain aquatic and gilled. The species originates from the lake underlying Mexico City and is also called ajolote (which is also the common name for the Mexican Mole Lizard). Axolotls are used extensively in scientific research due to their ability to regenerate most body parts, ease of breeding, and large embryos. They are commonly kept as pets in the United States, Great Britain, Australia, Japan (sold under the name wooper looper (ウーパールーパー Ūpā Rūpā)) and other countries.
Axolotls should not be confused with waterdogs, the larval stage of the closely related Tiger Salamanders (Ambystoma tigrinum and Ambystoma mavortium), which are widespread in much of North America and also occasionally become neotenic, nor with mudpuppies (Necturus spp.), fully-aquatic salamanders which are not closely related to the axolotl but bear a superficial resemblance.
As of 2008[update], wild axolotls are near extinction due to urbanization in Mexico City and polluted waters. Nonnative fish such as African tilapia and Asian carp have also recently been introduced to the waters. These new fish have been eating the axolotls' young, as well as its primary source of food. The axolotl is currently on the International Union for Conservation of Nature's annual Red List of threatened species.
| Axolotl | |
|---|---|
 | |
| Leucistic specimen | |
| Conservation status | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Amphibia |
| Order: | Caudata |
| Family: | Ambystomatidae |
| Genus: | Ambystoma |
| Species: | A. mexicanum |
| Binomial name | |
| Ambystoma mexicanum (Shaw, 1789) | |
A sexually mature adult axolotl, at age 18–24 months, ranges in length from 15–45 centimetres (5.9–18 in), although a size close to 23 centimetres (9.1 in) is most common and greater than 30 centimetres (12 in) is rare. Axolotls possess features typical of salamander larvae, including external gills and a caudal fin extending from behind the head to the vent. Their heads are wide, and their eyes are lidless. Their limbs are underdeveloped and possess long, thin digits. Males are identified by their swollen cloacae lined with papillae, while females are noticeable for their wider bodies full of eggs. Three pairs of external gill stalks (rami) originate behind their heads and are used to move oxygenated water. The external gill rami are lined with filaments (fimbriae) to increase surface area for gas exchange. Four gill slits lined with gill rakers are hidden underneath the external gills. Axolotls have barely visible vestigial teeth, which would have developed during metamorphosis. The primary method of feeding is by suction, during which their rakers interlock to close the gill slits. External gills are used for respiration, although buccal pumping (gulping air from the surface) may also be used in order to provide oxygen to their lungs. Axolotls have four different colours, two naturally occurring colours and two mutants. The two naturally occurring colours are wildtype (varying shades of brown usually with spots) and melanoid (black). The two mutant colours are leucistic (pale pink with black eyes) and albino (golden, tan or pale pink with pink eyes).
The axolotl is only native to Lake Xochimilco and Lake Chalco in central Mexico. Unfortunately for the axolotl, Lake Chalco no longer exists as it was drained by humans to avoid periodic flooding, and Lake Xochimilco remains a diminished glimpse of its former self, existing mainly as canals. The water temperature in Xochimilco rarely rises above 20 °C (68 °F), though it may fall to 6 or 7 °C (45 °F) in the winter, and perhaps lower. The wild population has been put under heavy pressure by the growth of Mexico City. Axolotls are also sold as food in Mexican markets and were a staple in the Aztec diet. They are currently listed by CITES as an endangered species and by IUCN as critically endangered in the wild, with a decreasing population.
Axolotls are members of the Ambystoma tigrinum (Tiger salamander) complex, along with all other Mexican species of Ambystoma. Their habitat is like that of most neotenic species—a high altitude body of water surrounded by a risky terrestrial environment. These conditions are thought to favor neoteny. However, a terrestrial population of Mexican Tiger Salamanders occupies and breeds in the axolotl's habitat.
The axolotl is carnivorous, consuming small prey such as worms, insects, and small fish in the wild. Axolotls locate food by smell, and will "snap" at any potential meal, sucking the food into their stomachs with vacuum force.
http://en.wikipedia.org/wiki/Axolotl
jueves, junio 03, 2010
探頭 巴西烏龜 (Red-eared Slider)
探頭 巴西烏龜 (Red-eared Slider), inserito originariamente da *KUO CHUAN.
The red-eared slider (Trachemys scripta elegans) is a semi-aquatic turtle belonging to the family Emydidae. It is a subspecies of pond slider. It is a native of the southern United States, but has become common in various areas of the world due to the pet trade. They are popular pets in the United States, Mexico, the Netherlands, Canada, Japan, and the United Kingdom.
Red-eared sliders get their name from the distinctive red mark around their ear. The "slider" part of their name comes from their ability to slide off rocks and logs and into the water quickly. This species was previously known as Troost's turtle in honor of an American herpetologist; Trachemys scripta troostii is now the scientific name for another subspecies, the Cumberland turtle.
The female red-eared slider grows to be 25–33 cm (10–13 in) in length and males 20–25 cm (8–10 in). The red stripe on each side of the head distinguishes the red-eared slider from all other North American species. The carapace (top shell) is oval and flattened (especially in the male), has a weak keel that is more pronounced in the young, and the rear marginal scutes are notched. The carapace usually consists of a dark green background with light and dark highly variable markings. The plastron (bottom shell) is yellow with dark paired irregular markings in the center of most scutes. The plastron is highly variable in pattern. The head, legs, and tail are green with fine yellow irregular lines. Some dimorphism occurs between males and females. Male turtles are usually smaller than females but their tail is much longer and thicker. Claws are elongated in males which facilitate courtship and mating. Typically, the cloacal opening of the female is at or under the rear edge of the carapace while the male's opening occurs beyond the edge of the carapace. Older males can sometimes have a melanistic coloration being a dark grayish olive green, with markings being very subdued. The red stripe on the sides of the head may be difficult to see or be absent.
Red-eared sliders are omnivores and eat a variety of animal and plant materials in the wild including, but not limited to fish, crayfish, carrion, tadpoles, snails, crickets, wax worms, aquatic insects and numerous aquatic plant species. The captive diet for pet red-eared sliders should be a varied diet consisting of invertebrates such as worms, aquatic and land plants, and other natural foods. They should never be fed commercial dog food or cat food. Commercial turtle foods can be used sparingly and should not be used as the primary food. Calcium (for shell health) can be supplemented by adding pieces of cuttlebone to the diet, or with commercially available vitamin supplements. A nutritious food readily accepted by young turtles is baby clams soaked in krill oil covered with powdered coral calcium. Younger turtles tend to be more carnivorous (eat more animal protein) than adults do. As they grow larger and older, they become increasingly herbivorous. Live foods are particularly enjoyed and add to the quality of life of captive turtles. Providing a wide variety of foods is the key to success with captive red-eared sliders
Reptiles do not hibernate but actually brumate, becoming less active but occasionally rising for food or water. Brumation can occur in varying degrees. Red-eared sliders brumate over the winter at the bottom of ponds or shallow lakes and they become inactive, generally, in October, when temperatures fall below 50 °F (10 °C). Individuals usually brumate underwater. They have also been found under banks and hollow stumps and rocks. In warmer winter climates they can become active and come to the surface for basking. When the temperature begins to drop again, however, they will quickly return to a brumation state. Sliders will generally come up for food in early March to as late as the end of April. Red-eared sliders kept captive indoors should not hibernate. To prevent attempted hibernation/brumation in an aquarium, lights should be on for 12–14 hours per day and the water temperature should be maintained between 76–80 °F (24–27 °C). Water temperatures must be under 55 °F (13 °C) in order for aquatic turtles to brumate properly. Controlling temperature changes to simulate natural seasonal fluctuations encourages mating behavior.
| Red-eared slider | |
|---|---|
 | |
| Plastron of an adult red-eared slider | |
| Conservation status | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Subclass: | Anapsida |
| Order: | Testudines |
| Family: | Emydidae |
| Genus: | Trachemys |
| Species: | T. scripta |
| Subspecies: | T. s. elegans |
| Trinomial name | |
| Trachemys scripta elegans (Wied-Neuwied, 1839) | |
Red-eared sliders get their name from the distinctive red mark around their ear. The "slider" part of their name comes from their ability to slide off rocks and logs and into the water quickly. This species was previously known as Troost's turtle in honor of an American herpetologist; Trachemys scripta troostii is now the scientific name for another subspecies, the Cumberland turtle.
Red-eared sliders are almost entirely aquatic, but leave the water to bask in the sun and lay eggs. These reptiles are deceptively fast and are also excellent swimmers. They hunt for prey and will attempt to capture it when the opportunity presents itself. They are aware of predators and people and generally shy away from them. The red-eared slider is known to frantically slide off rocks and logs when approached.
Contrary to the popular misconception that red-eared sliders do not have saliva, they, like most aquatic turtles, have fixed tongues. This is the reason they must eat their food in water.The female red-eared slider grows to be 25–33 cm (10–13 in) in length and males 20–25 cm (8–10 in). The red stripe on each side of the head distinguishes the red-eared slider from all other North American species. The carapace (top shell) is oval and flattened (especially in the male), has a weak keel that is more pronounced in the young, and the rear marginal scutes are notched. The carapace usually consists of a dark green background with light and dark highly variable markings. The plastron (bottom shell) is yellow with dark paired irregular markings in the center of most scutes. The plastron is highly variable in pattern. The head, legs, and tail are green with fine yellow irregular lines. Some dimorphism occurs between males and females. Male turtles are usually smaller than females but their tail is much longer and thicker. Claws are elongated in males which facilitate courtship and mating. Typically, the cloacal opening of the female is at or under the rear edge of the carapace while the male's opening occurs beyond the edge of the carapace. Older males can sometimes have a melanistic coloration being a dark grayish olive green, with markings being very subdued. The red stripe on the sides of the head may be difficult to see or be absent.
Red-eared sliders are omnivores and eat a variety of animal and plant materials in the wild including, but not limited to fish, crayfish, carrion, tadpoles, snails, crickets, wax worms, aquatic insects and numerous aquatic plant species. The captive diet for pet red-eared sliders should be a varied diet consisting of invertebrates such as worms, aquatic and land plants, and other natural foods. They should never be fed commercial dog food or cat food. Commercial turtle foods can be used sparingly and should not be used as the primary food. Calcium (for shell health) can be supplemented by adding pieces of cuttlebone to the diet, or with commercially available vitamin supplements. A nutritious food readily accepted by young turtles is baby clams soaked in krill oil covered with powdered coral calcium. Younger turtles tend to be more carnivorous (eat more animal protein) than adults do. As they grow larger and older, they become increasingly herbivorous. Live foods are particularly enjoyed and add to the quality of life of captive turtles. Providing a wide variety of foods is the key to success with captive red-eared sliders
Reptiles do not hibernate but actually brumate, becoming less active but occasionally rising for food or water. Brumation can occur in varying degrees. Red-eared sliders brumate over the winter at the bottom of ponds or shallow lakes and they become inactive, generally, in October, when temperatures fall below 50 °F (10 °C). Individuals usually brumate underwater. They have also been found under banks and hollow stumps and rocks. In warmer winter climates they can become active and come to the surface for basking. When the temperature begins to drop again, however, they will quickly return to a brumation state. Sliders will generally come up for food in early March to as late as the end of April. Red-eared sliders kept captive indoors should not hibernate. To prevent attempted hibernation/brumation in an aquarium, lights should be on for 12–14 hours per day and the water temperature should be maintained between 76–80 °F (24–27 °C). Water temperatures must be under 55 °F (13 °C) in order for aquatic turtles to brumate properly. Controlling temperature changes to simulate natural seasonal fluctuations encourages mating behavior.
Courtship and mating activities for red-eared sliders usually occur between March and July, and take place underwater. The male swims toward the female and flutters or vibrates the back side of his long claws on and around her face and head. The female swims toward the male and, if she is receptive, sinks to the bottom for mating. If the female is not receptive, she may become aggressive towards the male. The courtship can take up to forty-five minutes, but the mating itself usually takes only ten to fifteen minutes.[citation needed]
Sometimes a male will appear to be courting another male. This is actually a sign of dominance and they may begin to fight. Juveniles may display the courtship dance, but until the turtles are five years of age they are not mature and are unable to mate.[citation needed]
After mating, the female spends extra time basking in order to keep her eggs warm. She may also have a change of diet, eating only certain foods or not eating as much as she normally would. Mating begins in May and egg-laying occurs in May through early July. A female might lay from two to thirty eggs, with larger females having larger clutches. One female can lay up to five clutches in the same year and clutches are usually spaced twelve to thirty-six days apart. Turtle eggs are fertilized as they are being laid and buried in the sand. The time between mating and egg laying can be days or weeks.
The red-eared slider is commonly kept as a pet and is often sold cheaply (and illegally). Red-eared sliders are the most common type of water turtle kept as pets. As with other turtles, tortoises and box turtles, individuals that survive their first year or two can be expected to live almost as long as their owners. Individuals of this species have lived at least 35 years in captivity.
Red-eared sliders can be quite aggressive—especially when food is involved. If being kept as a pet, care must be taken to prevent injury or even death of its smaller tankmates. However, the opposite can occur if shrimps are introduced as food. Smaller red-eared sliders less than a year old have been known to choke on the shells of the shrimps and suffer from lung puncture.
lunes, marzo 29, 2010
Burning Life
Fifteen Love
Ajanta Caves
The distinctive horse shoe shaped Ajanta caves site as viewed some 8 kms away
.... .... .... .... ....
Ajanta Caves (Ajaṇṭā; Devanagari: अजंठा लेणी) in Maharashtra, India are 28 - 30 rock-cut cave monuments created during the first century BCE and 5th century AD, containing paintings and sculptures considered to be masterpieces of both Buddhist religious art and universal pictorial art.
The caves are located just outside the village of Ajinṭhā in Aurangabad district in the Indian state of Maharashtra (N. lat. 20 deg. 30' by E. long. 75 deg. 40'). Since 1983, the Ajanta Caves have been a UNESCO World Heritage Site.
The caves are traditionally numbered starting from the one closest to the village.
http://en.wikipedia.org/wiki/Ajanta_caves
Ajanta Caves, Maharashtra, India
Stunning Buddha carving on the wall...
First period
First sanctuaries - chaytia-grihas - in the up to 75 metres deep canyon of Waghora River were created during the Satavahana dynasty in 2nd - 1st century BCE. Several sanctuaries (including sanctuaries No. 9, 10, 19, 26) were made. Murals preserved from this time belong to the oldest monuments of painted art in India.
Second period
There exists scientific controversy regarding the length and time of the second period of Ajanta Caves. While earlier it was considered that caves have been shaped over a longer period of time in 4th - 7th centurys, recently long-time researcher of Ajanta Caves Walter M. Spink considers that most activities have taken place in short time period from 460 - to 480 AD during the reign of Vakataka dynasty, emperor Harishena. At this time there took place simultaneous work of creating some 20 cave temples, for most part viharas - monasteries with sanctuary in the rear centre of structures. Each of cave temples seem to be patronised by influential authority, numerous best available artists have been involved in the work with fruitful rivalry between the neighbouring construction sites.
According to Spink, Ajanta Caves seem to be abandoned shortly after the fall of Harishena circa 480 AD. Since then these temples have been abandoned and gradually forgotten. During the next 1300 years the jungle grew back and the caves were hidden, unvisited and undisturbed.
Rediscovery by Europeans
In 28th April 1819 British officer in the Madras army John Smith during the hunt of tiger accidentally discovered entrance in one of the cave temples (No. 9) deep within the tangled undergrowth. Exploring that first cave, long since a home to nothing more than birds and bats and a lair for other, larger, animals, Captain Smith wrote his name in pencil on one of the walls. Still faintly visible, it records his name and the date, April 1819.
Shortly after this discovery Ajanta Caves became well known and renowned due to their exotic setting, impressive architecture, artworks and mysterious, long forgotten history.
Cave One
It is first approach and has no relation to the chronological sequence of the caves. It is the first cave on the eastern end of the horse-shoe shaped scarp. According to Spink, it is one of the latest caves to have begun on site and brought to near-completion in the Vākāţaka phase. Although there is no epigraphic evidence, it has been proposed that the Vākāţaka king Harisena may have been the benefactor of this better-preserved cave. A dominant reason for this is that Harisena was not involved initially in patronizing Ajanta.
This cave has one of the most elaborate carvings on its facade with relief sculptures on entablature and ridges. There are scenes carved from the life of the Buddha as well as a number of decorative motifs. A two pillared portico, visible in the 19th-century photographs, has since perished. The cave has a front-court with cells fronted by pillared vestibules on either side. These have a high plinth level. The cave has a porch with simple cells on both ends. The absence of pillared vestibules on the ends suggest that the porch was not excavated in the latest phase of Ajanta when pillared vestibules had become a necessity and norm. Most areas of the porch were once covered with murals, of which many fragments remain. There are three doorways: a central doorway and two side doorways. Two square windows were carved between the doorways to brighten the interiors.
Each wall of the hall inside is nearly 40 feet (12 m) long and 20 feet (6.1 m) high. Twelve pillars make a square colonnade inside supporting the ceiling, and creating spacious aisles along the walls. There is a shrine carved on the rear wall to house an impressive seated image of the Buddha, his hands being in the dharmachakrapravartana mudra. There are four cells on each of the left, rear, and the right walls. The walls are covered with paintings in a fair state of preservation. The scenes depicted are mostly didactic, devotional, and ornamental. The themes are from the Jataka stories (the stories of the Buddha's former existences as Boddhisattva), the life of the Gautama Buddha, and those of his veneration.
Cave Two
Cave 2, adjacent to Cave 1, is known for the paintings that have been preserved on its walls, ceilings, and pillars. It looks pretty much the same as Cave 1 and is in a better state of preservation.
The facade
Cave 2 has a porch quite different from Cave one. Even the facade carvings seem to be different. The cave is supported by robust pillars, ornamented with designs. The size and ground plan have many things in common with the first cave.
The porch
The front porch consists of cells supported by pillared vestibules on both ends. The cells on the previously "wasted areas" were needed to meet the greater housing requirements in later years. Porch-end cells became a trend in all later Vakataka excavations. The simple single cells on porch-ends were converted into CPVs or were planned to provide more room, symmetry, and beauty.
The paintings on the ceilings and walls of this porch have been widely published. They depict the Jataka tales that are stories of the Buddha's life in former existences as Bodhisattva. The porch's rear wall has a doorway in the center, which allows entrance to the hall. On either side of the door is a square-shaped window to brighten the interior.
The hall
The hall has four colonnades supporting the ceiling and surrounding a square in the center of the hall. Each arm or colonnade of the square is parallel to the respective walls of the hall, making an aisle in between. The colonnades have rock-beams above and below them. The capitals are carved and painted with various decorative themes that include ornamental, human, animal, vegetative, and semi-divine forms.
[edit] The paintings
Paintings are all over the cave except for the floor. At various places the art work has become eroded due to decay and human interference. Therefore, many areas of the painted walls, ceilings, and pillars are fragmentary. The painted narratives of the Jataka tales are depicted only on the walls, which demanded the special attention of the devotee. They are didactic in nature, meant to inform the community about the Buddha's teachings and life through successive births. Their placement on the walls required the devotee to walk through the aisles and 'read' the narratives depicted in various episodes. (Alas, to prevent vandalism, entry into the aisles is restricted by site authorities). The narrative episodes are depicted one after another although not in a linear order. Their identification has been a core area of research since the site's rediscovery in 1819 C.E. Dieter Schlingloff's identifications have updated our knowledge on the subject.
For quite some time the art work was erroneously alluded to as "frescoes". We now know that the proper term for this kind of artwork is mural, because the known process and technique of fresco painting isn't found in this kind of artwork. At Ajanta, the technique and process used to produce this kind of artwork is unlike any other artwork found in the art history of other civilizations. These murals have a certain uniqueness about them, even within the history of South Asian art.
The process of painting involved several stages. The first step was to chisel the rock surface, to make it rough enough to hold the plaster. The plaster was made of clay, hay, dung and lime. Differences are found in the ingredients and their proportions from cave to cave. While the plaster was still wet, the drawings were done and the colors applied. The wet plaster had the capacity to soak the color so that the color became a part of the surface and would not peel off or decay easily. The colors were referred to as 'earth colors' or 'vegetable colors.' Various kinds of stones, minerals, and plants were used in combinations to prepare different colors. Sculptures were often covered with stucco to give them a fine finish and lustrous polish. The stucco had the ingredients of lime and powdered seashell or conch. The latter afforded exceptional shine and smoothness. In cave upper six, some of it is extant. The smoothness resembles the surface of glass. The paint brushes used to create the artwork were made from animal hair and twigs.
http://en.wikipedia.org/wiki/Ajanta_caves
Cave 26, Ajanta caves
The first Buddhist cave monuments at Ajanta date from the 2nd and 1st centuries B.C. During the Gupta period (5th and 6th centuries A.D.), many more richly decorated caves were added to the original group. The paintings and sculptures of Ajanta, considered masterpieces of Buddhist religious art, have had a considerable artistic influence.
http://en.wikipedia.org/wiki/Ajanta_caves
martes, enero 26, 2010
2010 Year of the Tiger
2010 El año del Tigre!!!, inserito originariamente da Nubecitainthemoon.
The Sheng xiao (Chinese: 生肖; pinyin: shēngxiào), better known in English as the Chinese Zodiac, is a scheme that relates each year to an animal and its reputed attributes, according to a 12-year cycle. It has wide currency in several East Asian countries besides China and Taiwan.
Identifying this scheme using the term "zodiac" reflects several similarities to the Western zodiac: both have time cycles divided into 12 parts, each labels at least the majority of those parts with names of animals, and each is widely associated with a culture of attributing influence of a person's relationship to the cycle upon their personality and/or events in their life. Nevertheless, there are major differences: the "Chinese" 12-part cycle is divided into years rather than months; contrary to the association with animals implied in the Greek etymology of "zodiac", actually four of the Western "signs" or "houses" are represented by humans (one such sign being the twins "Gemini") and one is the inanimate balance scale "Libra"; the animals of the Chinese zodiac are not associated with constellations, let alone those spanned by the ecliptic plane.
Tiger (Yang, 3rd Trine, Fixed Element Wood): Unpredictable, rebellious, colorful, powerful, passionate, daring, impulsive, vigorous, stimulating, sincere, affectionate, humanitarian, generous. Can be restless, reckless, impatient, quick-tempered, obstinate, selfish, aggressive, unpredictable.
http://en.wikipedia.org/wiki/Chinese_zodiac
Metal (Chinese: 金; pinyin: jīn), is the decline of the matter, or the matter's decline stage. Metal is the fourth phase of Wu Xing.
Metal is yin in character, its motion is inwards and its energy is contracting. It is associated with the west and autumn, old age, the planet Venus and the color white. The archetypal metals are silver and gold. Its Primal Spirit is represented by a White Tiger.
The qualities associated with metal are unyieldingness, rigidity, persistence, strength and determination. The metal person is controlling, ambitious, forceful and set in their ways as metal is very strong; and they are self-reliant and prefer to handle their problems alone. The metal person is also materialistic, business oriented and good at organization and stability. However the metal person can also appreciate luxury and enjoy the good things in life. Just as metal can conduct electricity, the Metal person has strong impulses and generative powers and can bring about changes and transformations for those who come into contact with them. Metal is believed to govern the lungs, nose and skin. The negative emotion associated with metal is grief, while the positive emotion is courage.
In Chinese astrology metal is included in the 10 heavenly stems (the five elements in their yin and yang forms), which combine with the 12 earthly branches (or Chinese signs of the zodiac), to form the 60 year cycle. Yang metal years end in 0 (eg 1990), while Yin years end in 1 (eg 1991). Metal governs the Chinese zodiac signs Monkey, Rooster, and Dog.
In Chinese astrology the planet Venus is associated with metal, because it is white in color (the Chinese color of death), and rises in the west as the evening star. However, some Western astrologers have stated that the associations of metal are closer to the Western conception of the planet Saturn, and have suggested on that basis recognizing metal in Western astrology as a 'Combined Element' or 'Material' derived from Air and Earth[citation needed]; just as the planet Saturn rules the Air sign Aquarius and the Earth sign Capricorn.
In the control cycle metal is controlled by fire, as only fire can melt it; and in turn metal controls wood, as only the metal ax can cut down trees. In the conductive cycle, metal produces water (or liquid), either by trapping or holding it in a container, or by being melted into a liquid. In turn metal is produced by the earth, as it has to be dug out of the ground.
However, Cycle of Wu Xing also stated that, excessive volume of wood may defeat small metal, as an axe would be broken or dull after intending to chopping a forest.
lunes, enero 25, 2010
Comfortably Numb
Comfortably Numb, inserito originariamente da Rodrigo De Anda.
The ferret is a domestic mammal of the type Mustela putorius furo. Ferrets are sexually dimorphic predators with males being substantially larger than females. They typically have brown, black, white, or mixed fur, have an average length of 20 inches (51 cm) including a 5 inch (13 cm) tail, weigh about 1.5–4 pounds (0.7–2 kg), and have a natural lifespan of 7 to 10 years.
Several other small, elongated carnivorous mammals belonging to the family Mustelidae (weasels) also have the word ferret in their common names, including an endangered species, the Black-footed Ferret. The ferret is a very close relative of the polecat, but it is as yet unclear whether it is a domesticated form of the European Polecat, the Steppe Polecat, or some hybrid of the two.
The history of the ferret's domestication is uncertain, like that of most other domestic animals. It is very likely that ferrets have been domesticated for at least 2,500 years. They are still used for hunting rabbits in some parts of the world today, but increasingly they are being kept simply as pets.
Being so closely related to polecats, ferrets are quite easily able to hybridize with them, and this has occasionally resulted in feral colonies of ferret polecat hybrids that have been perceived to have caused damage to native fauna, perhaps most notably in New Zealand. As a result, some parts of the world have imposed restrictions on the keeping of ferrets.
In common with most domestic animals, the original reason for ferrets' domestication by human beings is uncertain but it may have involved hunting. It was most likely domesticated from the European polecat (Mustela putorius), though it is also possible that ferrets are descendants of the Steppe polecat (Mustela eversmannii), or some hybridization thereof. Analysis of mitochondrial DNA suggests that ferrets were domesticated around 2,500 years ago, although what appear to be ferret remains have been dated to 1500 BC. It has been claimed that the ancient Egyptians were the first to domesticate ferrets, but as no mummified remains of a ferret have yet been found, or any hieroglyph of a ferret, and no polecat now occurs wild in the area, that idea seems unlikely.
The Greek word ictis occurs in a play written by Aristophanes, The Acharnians, in 425 BC. Whether this was a reference to ferrets, polecats, or the similar Egyptian Mongoose is uncertain. The name "ferret" is derived from the Latin furittus, meaning "little thief", a likely reference to the common ferret penchant for secreting away small items. Ferrets were probably used by the Romans for hunting.
Colonies of feral ferrets have established themselves in areas where there is no competition from similarly sized predators, such as in the Shetland Islands and in remote regions in New Zealand. Where ferrets coexist with polecats, hybridization is common. It has been claimed that New Zealand has the world's largest feral population of ferret-polecat hybrids. In 1877, farmers in New Zealand demanded that ferrets be introduced into the country to control the rabbit population, which was also introduced by humans. Five ferrets were imported in 1879, and in 1882-1883, 32 shipments of ferrets were made from London, totaling 1,217 animals. Only 678 landed, and 198 were sent from Melbourne, Australia. On the voyage, the ferrets were mated with the European polecat, creating a number of hybrids that were capable of surviving in the wild. In 1884 and 1886, close to 4,000 ferrets and ferret hybrids, 3,099 weasels and 137 stoats were turned loose. Concern was raised that these animals would eventually prey on indigenous wildlife once rabbit populations dropped, and this is exactly what happened to New Zealand bird species which previously had no mammalian predators.
http://en.wikipedia.org/wiki/Ferret
viernes, enero 22, 2010
ghost
Fractal ART - monad AIWASS - モナド
A fractal is generally "a rough or fragmented geometric shape that can be subdivided into parts, each of which is (at least approximately) a reduced-size copy of the whole," a property called self-similarity. The term was coined by Benoît Mandelbrot in 1975 and was derived from the Latin fractus meaning "broken" or "fractured."
Turquoise-browed motmot
Turquoise-browed motmot, inserito originariamente da jrbyls.
The Turquoise-browed Motmot (Eumomota superciliosa) also called Torogoz by the inhabitants of El Salvador; is a colourful, medium-sized bird of the motmot family, Momotidae. It inhabits Central America from south-east Mexico (mostly the Yucatán Peninsula), to Costa Rica, where it is common and not considered threatened. It lives in fairly open habitats such as forest edge, gallery forest and scrubland. It is more conspicuous than other motmots, often perching in the open on wires and fences. From these perches it scans for prey, such as insects and small reptiles. White eggs (3-6) are laid in a long tunnel nest in an earth bank or sometimes in a quarry or fresh-water well.
The bird is approximately 34 cm long and weighs about 65 grams. It has a mostly green body with a rufous back and belly. There is a bright blue stripe above the eye and a blue-bordered black patch on the throat. The flight feathers and upperside of the tail are blue. The tips of the tail feathers are shaped like rackets and the bare feather shafts are longer than in other motmots. Although it is often said that motmots pluck the barbs off their tail to create the racketed shape, this is not true; the barbs are weakly attached and fall off due to abrasion with substrates and with routine preening.
Unlike most bird species, where only males express elaborate traits, the Turquoise-browed Motmot expresses the extraordinary racketed tail in both sexes. Research indicates that the tail has evolved to function differently for the sexes. Males apparently use their tail as a sexual signal, as males with longer tails have greater pairing success and reproductive success. In addition to this function, the tail is used by both sexes in a wag-display, whereby the tail is moved back-and-forth in a pendulous fashion. The wag-display is performed in a context unrelated to mating: both sexes perform the wag-display in the presence of a predator, and the display is thought to confer naturally selected benefits by communicating to the predator that it has been seen and that pursuit will not result in capture. This form of interspecific communication is referred to as a pursuit-deterrent signal.
The call is nasal, croaking and far-carrying.
The Turquoise-browed Motmot is a well-known bird in its range and has been chosen as the national bird of both El Salvador and Nicaragua. It has acquired a number of local names including guardabarranco ("ravine-guard") in Nicaragua, torogoz in El Salvador (based on its call) and pájaro reloj ("clock bird") in the Yucatán, based on its habit of wagging its tail like a pendulum. In Costa Rica it is known as Momoto Cejiceleste.
Astronomy Hall
lunes, enero 18, 2010
viernes, enero 15, 2010
Flamingo Tongue
Flamingo Tongue, inserito originariamente da blondecavefish.
The flamingo tongue snail, Latin name Cyphoma gibbosum, is a species of small but brightly colored sea snail, a marine gastropod mollusk in the family Ovulidae, the cowry allies. Although the live animal is brightly colored, the shell is plain white.
This sea snail is found living on various species of soft corals and sea fans.
The flamingo tongue feeds by browsing on the living tissues of the soft corals on which it lives. Common prey include Briareum spp., Gorgonia spp., Plexaura spp., and Plexaurella spp. Adult female C. gibbosum attach eggs to coral which they have recently fed upon. After roughly a week and a half, the larvae hatch. They are planktonic and eventually settle onto other gorgonian corals. Juveniles tend to remain on the underside of coral branches while adults are far more visible and mobile. Adults scrape the polyps off the coral with their radula, leaving an easily visible feeding scar on the coral. However, the corals can regrow the polyps, and therefore predation by C. gibbosum is generally not lethal.
The shell of this species is white with no markings at all except sometimes a yellow tinge at the margins. The shell is about one inch (25 mm) long, and vaguely resembles the shell of a cowry.
When it is alive, the snail appears bright orange-yellow in color with black markings. However, these colors are not in the shell, but are only due to the thin flaps of live mantle tissue which usually cover the shell. The mantle flaps can be retracted, exposing the shell, but this usually happens only when the animal is attacked.
http://en.wikipedia.org/wiki/Flamingo_tongue_snail
This sea snail is found living on various species of soft corals and sea fans.
The flamingo tongue feeds by browsing on the living tissues of the soft corals on which it lives. Common prey include Briareum spp., Gorgonia spp., Plexaura spp., and Plexaurella spp. Adult female C. gibbosum attach eggs to coral which they have recently fed upon. After roughly a week and a half, the larvae hatch. They are planktonic and eventually settle onto other gorgonian corals. Juveniles tend to remain on the underside of coral branches while adults are far more visible and mobile. Adults scrape the polyps off the coral with their radula, leaving an easily visible feeding scar on the coral. However, the corals can regrow the polyps, and therefore predation by C. gibbosum is generally not lethal.
The shell of this species is white with no markings at all except sometimes a yellow tinge at the margins. The shell is about one inch (25 mm) long, and vaguely resembles the shell of a cowry.
When it is alive, the snail appears bright orange-yellow in color with black markings. However, these colors are not in the shell, but are only due to the thin flaps of live mantle tissue which usually cover the shell. The mantle flaps can be retracted, exposing the shell, but this usually happens only when the animal is attacked.
http://en.wikipedia.org/wiki/Flamingo_tongue_snail
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