Mary Allen
Gabatarwa: Hakora akan hanci
Lokacin da muke tunanin hakora, yawanci muna tunanin su a cikin bakin dabba. Duk da haka, wasu dabbobin suna da hakora a hanci, wanda ke aiki daban-daban kamar tsaro, farauta, da sadarwa. Waɗannan haƙoran haɓakawa ne na juyin halitta wanda ya taimaka wa waɗannan dabbobi su rayu a cikin muhallin su. A cikin wannan labarin, za mu tattauna game da dabbobi uku masu hakora a hanci: narwhal, tururuwa saiga, da tawadar hanci mai tauraro.
The Narwhal: Narwhal mai haƙori na musamman
Narwhal wani nau'in kifin kifi ne mai matsakaicin girma wanda ke zaune a cikin ruwan Arctic na Kanada, Greenland, da Rasha. Daya daga cikin fitattun sifofi na narwhal shine tsayinsa, karkataccen hanta wanda ke fitowa daga lebbansa na sama. Wannan haƙori na iya girma har zuwa ƙafa 10 a tsayi kuma haƙiƙa ne wanda aka gyara.
Haƙorin Narwhal: Haƙori da aka gyara
Hakorin narwhal dogo ne, madaidaiciya, hakori mai launin hauren giwa wanda ke tsiro ta cikin leben narwhal na sama. Ya ƙunshi tsakiyar tsakiya na dentin, kewaye da wani Layer na enamel a waje. Ba kamar yawancin haƙora ba, waɗanda suke girma kai tsaye daga muƙamuƙi, haƙorin narwhal yana girma a cikin karkace, kamar ƙahon unicorn.
Manufar hakin Narwhal: Tsaro, farauta, sadarwa?
Har yanzu ba a tabbatar da manufar tuk ɗin narwhal ba, amma masana kimiyya sun ba da shawara da dama. Wasu sun yi imanin cewa ana amfani da haron ne don kariya daga maharbi, yayin da wasu kuma suka ce ana amfani da shi wajen farautar kifi ko kuma a matsayin kayan aiki na fasa ƙanƙara. Wasu masu binciken kuma sun yi imanin cewa ana iya amfani da haron don sadarwa tare da wasu narwhals.
Saiga Antelope: Unicorn na steppe
Antelope saiga dabba ce ta musamman da ke zaune a cikin ciyayi na Eurasia. An san su da hanci na musamman, mai tsayi da faɗuwa, mai manyan hanci biyu. Hancin saiga antelope ɗin daidaitawa ne don numfashi da sanyaya a cikin yanayin zafi da bushewa.
Saiga hancin antelope: daidaitawa don numfashi da sanyaya
An yi amfani da hancin saiga don tace kura da sanyaya iska mai zafi da suke shaka, manyan hancinsu kuma suna taimaka musu wajen jin warin dawa daga nesa, wanda zai ba su damar gano hatsari da gudu cikin lokaci.
Saiga haƙoran antelope: Ana amfani dashi don tono da tsaro
Hakoran kuran saiga suna nan a gaban hancinsu, kusa da lebbansu na sama. Ana amfani da waɗannan haƙoran don tono saiwoyi da tubers, waɗanda ke da muhimmin sashi na abincinsu. Suna kuma amfani da haƙoransu don kare kansu daga maguzanci, kamar kerkeci da gaggafa.
Tauraron hancin Mole: Jagoran taɓawa
Tauraro mai hancin tauraro ƙarami ce, mai kama da tawadar halitta mai shayarwa wacce ke zaune a cikin dausayi na gabashin Arewacin Amirka. An san shi da takamaiman hancinsa, wanda ke lulluɓe da ƴan ƙanana, ruwan hoda masu kama da tauraro. Waɗannan tanti suna da matukar damuwa don taɓawa kuma suna taimaka wa tawadar tawadar don kewayawa da samun ganima a cikin duhu da ruwa mai duhu.
Hancin tawadar da ke hancin tauraruwa: Gaɓar gaɓa mai matukar damuwa
Hancin tauraro mai hanci wani abu ne mai matukar damuwa wanda ke rufe fiye da 25,000 masu karɓa. Waɗannan masu karɓa suna ƙyale tawadar halitta ta gano ko da ƙananan motsi da rawar jiki a cikin ruwa, suna taimaka masa wajen gano ganima kamar kwari, tsutsotsi, da ƙananan kifi.
Hakora tauraro mai hanci: Taimaka tare da kama ganima da tsaro
Haƙoran tauraro mai hanci suna nan a gaban hancinsa, kusa da tenticles. Waɗannan haƙoran suna da kaifi da nuni, kuma suna taimaka wa tawadar tawa don kamawa da kashe ganimarsa. Har ila yau, suna amfani da haƙoransu don kare kansu daga mahara, kamar macizai da tsuntsayen ganima.
Sauran dabbobi masu hakora a hanci
Baya ga narwhal, saiga tururuwa, da tauraro mai hanci, akwai wasu dabbobi da dama da ke da hakora a hanci. Waɗannan sun haɗa da shrew-nosed shrew, Hispaniolan solenodon, da giwa na Afirka.
Kammalawa: Hakora a kan hanci, fa'idar juyin halitta
Hakora a kan hanci na iya zama kamar bakon karbuwa, amma sun tabbatar sun zama fa'idar juyin halitta ga dabbobi da yawa. Tun daga haƙorin narwhal zuwa haƙoran tururuwa saiga da hancin tauraro mai hanci, waɗannan gyare-gyare sun taimaka wa waɗannan dabbobi su rayu da bunƙasa a cikin muhallinsu.