Giwan daji na Afirka
Giwayan Daji na Afirka ( wadda ake kira da Loxodonta africana ), wanda kuma aka sani da giwayen savanna na Afirka, ɗaya ne daga cikin fitattun nau'ikan giwayen Afirka guda biyu kuma ɗaya daga cikin nau'ikan giwaye uku. Ita ce dabba mafi girma a duniya mai rai, tare da manyan bijimai sun kai tsayin kafada har zuwa mita 3.96 (13 ft 0 ku a) da kuma yawan jiki har zuwa 10.4 t (11.5 gajere ton) . [1]
| Giwan daji na Afirka | |
|---|---|
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| Conservation status | |
|
Invalid status IUCN3.1 :
| |
| Scientific classification | |
| Class | mammal (en)  |
| Order | Proboscidea (en) |
| Dangi | Elephantidae (en) |
| Genus | African elephant (en)
|
| jinsi | Loxodonta africana Blumenbach, 1797
|
| Geographic distribution | |
 | |
| General information | |
| Pregnancy | 22 wata |
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An rarraba ta a cikin kasashen Afirka 37 kuma suna zaune a cikin dazuzzuka, ciyayi da ciyayi, wuraren dausayi da filayen noma. Tun daga shekarar 2021, an jera su azaman Haɗari akan IUCN Red List . Ana fuskantar barazana ta farko ta hanyar lalata wuraren zama, da kuma a wasu sassa na kewayon ta ta hanyar farautar nama da hauren giwa [2].
Asali
gyara sasheElephas africanus shine sunan kimiyya wanda wani tsohon bature mai suna Johann Friedrich Blumenbach ya gabatar a shekarar 1797. Frédéric Cuvier ya gabatar da Loxodonte azaman suna na giwaye na Afirka a shekarar 1825. Wannan sunan yana nufin enamel mai siffar lozenge na haƙoran haƙora, wanda ya bambanta sosai da siffar enamel na giwa na giwa na Asiya [3].
Bincike
gyara sasheWani binciken kwayoyin halitta wanda aka ya yi nazari kan mitogenomic ya nuna cewa giwayen Afirka da Asiya sun banbanta a kwayoyin halitta kimanin shekaru miliyan bakwai da dubu dari shidda (7.6) da suka wuce. [4] Binciken Phylogenetic na DNA na nukiliya na daji na Afirka da giwayen daji, giwayen Asiya, woolly mammoth, da mastodon na Amurka sun nuna cewa giwayen daji na Afirka da giwar daji na Afirka sun zama wata 'yar'uwa wacce ta bambanta ta asali a kalla shekaru miliyan 1.9 da suka gabata. Don haka ana la'akari da su nau'i daban-daban. Kwayoyin halittar jini tsakanin nau'ikan biyu, duk da haka, mai yiwuwa ya faru bayan rabuwar. [5]
Halaye
gyara sasheFata da kunnuwa
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Manazarta
gyara sashe- ↑ Empty citation (help)
- ↑ Hanks, J. (1973). "Reproduction in the male African elephant in the Luangwa Valley, Zambia". South African Journal of Wildlife Research. 3 (2): 31–39.
- ↑ Laws, R. M.; Parker, I. S. C.; Johnstone, R. C. B. (1975). Elephants and Their Habitats: The Ecology of Elephants in North Bunyoro, Uganda. Oxford: Clarendon Press.
- ↑ Empty citation (help)
- ↑ Jachmann, H.; Berry, P. S. M. & Imae, H. (1995). "Tusklessness in African elephants: a future trend". African Journal of Ecology. 33 (3): 230–235. doi:10.1111/j.1365-2028.1995.tb00800.x.