Yaushe karnuka suke yin launin toka?

Kuna iya ganin dabba sau da yawa tare da farin mayafi ko tarnaƙi, amma ba zai yiwu ba a fili yanke hukunci cewa kuna da tsohuwar kare a gaban ku. Kare launin toka lalle ba haƙƙin ɗan kwikwiyo ba ne, amma tsofaffin dabbobi ma ba lallai ba ne.

Yaya karnuka suke yin launin toka?

Akwai ra'ayi cewa karnuka, kamar mutane, suna yin launin toka idan sun kai wani takamaiman shekaru. Manyan karnuka - daga shekaru 6, matsakaici - daga 7, da ƙananan dabbobi daga shekaru 8. Amma wannan ba gaskiya ba ne gabaɗaya, ana iya cewa ko kaɗan ba gaskiya ba ne. Karnuka suna yin launin toka saboda dalilai da yawa lokaci guda. Da fari dai, gado yana da alhakin bayyanar gashi. Abu na biyu, da yawa ya dogara da launi da iri. An tabbatar da haka poodle launin ruwan kasa, launin toka na farko zai iya bayyana a farkon shekaru 2.

Gashin launin toka a cikin karnuka, kamar a cikin mutane, ba shi da alaƙa da shekaru ko lafiya.

Abubuwan da ke haifar da launin toka a cikin karnuka

Babu takamaiman bayanai kan abubuwan da ke haifar da launin toka a cikin dabbobi, amma akwai hasashe da yawa, kowannensu yana da hakkin ya wanzu.

1. Canje-canje yana faruwa a cikin tsarin gashi - iska yana bayyana tsakanin fibrils na keratin. Lokacin da haske ya faɗi akan ulu, wannan yana haifar da hangen nesa na gashi mai launin toka.

2. A cikin jikin dabba, samar da melanocytes ya ragu, an hana aikin su, wanda kuma yana haifar da canza launin gashi.

3. Kwayoyin gashi suna samar da ƙarancin hydrogen peroxide, yana raguwa a hankali, wanda ke haifar da gashi mai toka.

Akwai abubuwa da yawa da ke haifar da canjin launin dabba. Masana kimiyya har yanzu ba za su iya tantance dalilin launin toka ba a cikin karnuka.

Har zuwa yau, sun sami damar tabbatar da hakan kawai saboda akai-akai danniya a cikin dabbobi (ba tare da la'akari da shekaru, launi da nau'in nau'in ba), ƙuƙwalwar ya fara yin launin toka. Gaskiya ne, wannan kuma ba axiom ba ne: akwai karnuka waɗanda launin toka yana farawa daga tarnaƙi ko daga baya. Hormones na damuwa, adrenaline da norepinephrine, sune alhakin wannan.

Wani bincike da mujallar Applied Animal Behavior Science ta gudanar ya tabbatar da cewa gashin toka yana da halayyar ko dai ga dabbobi masu juyayi, ko kuma ga wadanda ke rayuwa cikin damuwa akai-akai, ko ga karnuka sama da shekaru 4.

Tushen shaidar, ba shakka, ba a tattara da yawa ba. Samfurin ya haɗa da karnuka 400, waɗanda aka zaɓa ba da gangan ba. An gudanar da bincike na gani kawai, an kuma tattara anamnesis na dabba. Sakamakon haka, sakamakon ya kasance kamar haka:

• Dabbobin gida yana da lafiya ko rashin lafiya - wannan baya shafar adadin gashi;

• karnuka suna yin launin toka a cikin shekaru 4, idan babu abubuwan da ke haifar da tashin hankali;

• damuwa da tsoro suna haifar da gashi mai launin toka a cikin karnuka na kowane girma da launi a shekara guda.

21 2019 ga Yuni

An sabunta: Yuli 1, 2019