Table of contents:
- Life span
- Nutrition / food
- Social structure
- Season / period of breeding
- Incubation of eggs
- Benefit / harm to humans
- On a note:
Video: Tiger Ambistoma (Ambystoma Tigrinum)
2023 Author: Molly Page | [email protected]. Last modified: 2023-11-27 22:49
Tiger ambistoma, or tiger salamander, or North American ambistoma (Ambystoma tigrinum) lives in North America everywhere: in deciduous and coniferous forests, alpine and subalpine meadows, fields, semi-deserts and deserts. Thanks to the pineal gland (pineal gland), they are perfectly oriented in space, the owner of excellent visual memory. Can eat prey, which is a fifth of its length.
Southern Canada, USA, Northern Mexico.
Tiger Ambistoma is the largest ambistoma in the world. There are currently eight subspecies. The head is large, the muzzle is wide, rounded. The eyes are small, round, set wide apart. The front legs have four toes and the hind legs have five. There are two tubercles on the soles of the paws. The trunk of the ambistoma is intercepted from the sides by 13 grooves. The vertebrae are biconcave, the angular bone of the skull is absent, the palatine teeth are located transversely. Thanks to the pineal gland (pineal gland), they are perfectly oriented in space, it has excellent visual memory. The epiphysis is located behind the eyes.
Yellow spots or stripes are scattered over a brown or dark olive background. The belly of the ambistoma is gray. The lower lip and throat in adults are colored yellow; the intensity of the coloration is individual for each individual. There are albino forms.
Sizes up to 30 cm, of which more than half is on the tail.
Tiger ambistomas live up to 20 years.
Related article Content of tiger ambistoma (Ambystoma tigrinum)
They live everywhere: deciduous and coniferous forests, alpine and subalpine meadows, fields, semi-deserts and deserts, waterfalls (rarely). It can be found in open places, meadows, pastures, forests, fields, and even in cities. To reproduce, ambistomas need water (water temperature 18-24 ° C): swamps, lakes and other permanent bodies of water. Tiger ambistoma prefers sandy or loose mail.
Enemies include birds, raccoons, possums. Predatory fish and bullfrog hunt for larvae and caviar. When the enemy approaches, the tiger ambistoma takes a defensive posture: the body bends in an arc, the tail is raised and sways from side to side. When hesitates, milky toxin is shaken off the tail, which falls on the enemy. Some predators hunt ambist in spite of their toxins, such as raccoons. They roll around in the mud to the ambistova until all the toxins are wiped off her skin.
Nutrition / food
The tiger ambistoma can eat prey that makes up a fifth of the amphibian's length. Up to 30-60 victims were found in the stomachs of an ambist 9-10 cm long. It hunts using the sense of smell, attacking both moving and stationary prey. Approaching the prey almost close, the ambistoma raises the upper jaw, sticks out its tongue, grabs the prey and pulls it into the mouth. Adults and larvae eat everything that is slightly smaller in size: worms, molluscs and other invertebrates.
During the day, the tiger ambistoma hides in the holes of rodents, under snags, stones, and goes hunting at night. If there is nothing suitable, then he can dig a hole on his own. Avoids the sun and open spaces. They prefer damp places, they do not move away from water bodies. It goes into water bodies during the breeding season. Wintering begins in October. Winters in rodent burrows.
Lead a solitary lifestyle, except for the breeding season.
Fertilization in an ambist is internal. The female captures the spermatophores laid by the males with the cloaca, and lays eggs sacs, in which there are up to 200-500 eggs (1.9-2.6 mm in diameter). One female can lay 100-1000 eggs per season. Spawning begins 24-48 hours after fertilization, at night. The female lays eggs, attaching it to twigs, grass stalks, leaves, stones, driftwood, i.e. everything that lies at the bottom of the reservoir. With a large congestion, males begin to fight with each other for the best places. The winner usually finishes the loser. Sometimes the male goes on a trick and deposits his spermatophores on top of the spermatophores of other males.
Season / period of breeding
In the northern territories, eggs are laid in March-June, in the southern - from December to February, in the southwestern - from July to August.
Maturation occurs at the age of 4-5 years.
Incubation of eggs
Caviar development lasts 24-30 days.
Newborn larvae are 13-17 mm long. The head is flattened, the eyes are small. In the first 4-6 days they live off yolk reserves. The larvae of the tiger ambistoma are predators, they hunt aquatic insects and invertebrates. They prefer warm water - 23-26 ° C. Development of ambistoma larvae in water is 75-120 days. Having reached a length of 80-86 mm, the larvae metamorphize and leave the reservoir. In the mountains, the larvae develop for about a year. Cases of complete neoteny are common. In the absence of food, cases of cannibalism are frequent.
Related article Content of tiger ambistoma - questions and answers
Benefit / harm to humans
Large larvae eat small fish, but compared to predatory fish, the damage from their actions is extremely small. They eat harmful insects.
On a note:
As a defense, the tiger ambistoma secretes milk toxin from the parotid glands (paratoids).
The spotted blue ambistoma (Ambystoma laterale) gets its name from the bluish-blue or whitish spots on the tail, back, legs and belly. The pattern of spots is individual for each amphibian. Inhabits flat mature forests, abounding in damp and wetlands, next to open bodies of water
The Texas salamander , or short-headed ambistoma, lives in North America. They prefer wet places - river floodplains, fallen and decaying trees near water bodies and marshes, or fallen leaves. Uses burrows dug by other animals. In response to an attack by a predator, adult amphibians assume a defensive position
The marble ambistoma , or tape salamander, is endemic to North America. Inhabits various habitats: deciduous and mixed forests of foothill or coastal plains. Most of its life hides under rotten logs, stones, or fallen vegetation. The larvae feed on zooplankton, while the adults prey on a variety of slow invertebrates
How to properly pick up a tiger ambistoma?Wash your hands thoroughly. There should be no traces of any chemicals (soap, lotion, perfume, etc.) on your hands. Moisten your hands slightly. Place the ambistome in the palm of your hand, hold its paw with the thumb and forefinger of your other hand
The tiger ambistoma is not interesting in keeping, as it is active at night, digs holes. May not leave its burrow for several weeks. You will need an aquarium whose walls, in addition to the front, are painted black. A mixture of compost, peat and humus is used as a substrate, and a layer of sphagnum moss is laid on top