Rough-skinned newt
The rough-skinned newt is a small, stocky amphibian from the Pacific Northwest of North America. Its skin gives off one of the strongest toxins of any newt, so it is a creature to admire from a distance and never handle. Its toxin is also linked to a famous fight between newts and garter snakes.1

Otú ị ga-esi mata ya
- Stocky body with a rounded snout.1
- Top ranges from light brown to olive or brownish-black.1
- Underside, including the head, legs and tail, is orange to yellow.1
- Skin is granular, but males are smooth-skinned during the breeding season.1
- Adults are 11 to 18 cm long overall, including the tail.1
A na-agwakọkarị ya na: The California newt (Taricha torosa) looks similar. The rough-skinned newt has smaller eyes, yellow irises, V-shaped tooth patterns and uniformly dark eyelids. During breeding season, males have large swollen vent lobes and cornified toe pads, which separate them from females.1
Ike nsị
Akpụkpọ ahụ ya nwere nsị. Ọ dị egwu imetụ ya aka, iracha ya ma ọ bụ iri ya.
Gịnị ka nsị dị n'ahụ ya na-eme?
This animal is poisonous rather than venomous, so it does not bite or sting. Its skin produces tetrodotoxin (TTX), a neurotoxin that attacks the nerves. It blocks the sodium channels that nerves need to send signals. This can cause paralysis and death by asphyxiation, which means the person cannot breathe.1
Kedu otú o si dị egwu nye mmadụ?
Ihe ize ndụ nye mmadụ: Ọ dị egwu nke ukwuuỌ nwere ike igbu onye na-enwetaghị ọgwụgwọ.The toxin is mainly dangerous if the newt is eaten. Some people have had skin irritation after handling the newt, especially if they touch their eyes without washing their hands first. In 1979, a 29-year-old man from Oregon died after eating one. Some newts make enough toxin to kill several adult humans.1
Gịnị ka ọ na-eme mgbe ụjọ tụrụ ya?
It gives off an acrid smell that warns animals to stay away.1
Ọ bụrụ na mmadụ metụrụ ya aka ma ọ bụ rie ya
- Ọ bụrụ na mmadụ metụrụ otu aka: saa aka nke ọma, emetụkwala anya ma ọ bụ ọnụ aka. Ọ bụrụ na nwatakịrị ma ọ bụ anụ ụlọ rachara otu ma ọ bụ rie ya: kpọọ ụlọ ọrụ ndụmọdụ nsị (poison centre) ma ọ bụ nọmba mberede gị.
Na-ebu ụzọ kpọọ nọmba mberede gị mgbe niile (112, 000, 911). Nke a bụ ndụmọdụ enyemaka mbụ n'ozuzu, ọ bụghị ndụmọdụ ọgwụ. Isi ihe enyemaka mbụ
Nọrọ na nchekwa
- Emetụla anụ ọhịa aka, ejidela ya, emekwala ya ihe ọjọọ, ọbụna obere, ọbụna ma ọ dị ka ọ na-ehi ụra ma ọ bụ nwụọ anwụ.
- Nye ya ohere. Ọ bụrụ na ị zutere otu, dị jụụ, laghachi azụ nwayọ, hapụ ya ka ọ gaa ụzọ ya.
- Ọ bụrụ na i metụrụ ya aka ma ọ bụ rie ya: ehichala anya gị ma ọ bụ ọnụ gị, saa aka gị, chọọkwa enyemaka ọgwụ.
Ọ naghị achụ gị. Nsị ya dị naanị ka ihe ọ bụla ghara iri ya. Ihe ndị ọzọ gbasara ịnọ na nchekwa
Ọ hà aṅaa?
Kedu otú o si dị ogologo?
dị ogologo dị ka blọk egwuregwu 6 n'ahịrịKedu otú Rough-skinned newt si hà ma e jiri ya tụnyere GỊ?
Naanị mgbakọ na mwepụ n'ime browser gị. Ọ dịghị ihe echekwara ma ọ bụ ezigara ebe ọ bụla.
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Eziokwu
Some common garter snakes can eat rough-skinned newts and survive. They are the only known animals today able to do this.1
A garter snake tests a newt's toxin level by partly swallowing it, then either swallows it fully or lets it go.1
Newts can detect the chemical signature of a snake that has digested one of their kind, and they move away from it.1
The toxin is made by the newt's skin microbiome, meaning the bacteria living on its skin.1
The newt and the garter snake are an example of an evolutionary arms race. Each change in one species drives change in the other.1
The toxin also appears in pufferfish and other marine animals, which share the same nerve-blocking effect.1
Maka ndị ọkachamara nsị
Ebe eziokwu ndị a si
- Rough-skinned newt (Wikipedia (CC BY-SA 4.0))
- Taricha granulosa (iNaturalist): aha na nhazi ọkwa.
- Venom Wiki: ọkwa ihe ize ndụ, nha nkịtị na nchepụta ọsọ bụ nke anyị. Lee otú anyị si achọpụta ha: Otú anyị si atụ ihe ize ndụ.
Eziokwu ọ bụla dị na peeji a nwere nọmba na-egosi ebe o si. Ọ bụrụ na anyị mehiere ihe, ndo, anyị bụ ndị hụrụ anụmanụ n'anya, ọ bụghị akwụkwọ akụkọ sayensị. Gwa anyị na [email protected], anyị ga-edozi ya.
Nsị n'akpụkpọ ahụ ya