Mary Allen
Sharki ihove dziri kumba mumakungwa ese. Mhando shoma dzinogarawo munzizi. Ivo ndeveboka rehove dzinodya: vazhinji vavo vanodya hove nedzimwe mhuka dzemugungwa.
Kana shark dzichishambira pamusoro pemvura, dzinogona kutariswa ne triangular dorsal fin inobuda mumvura. Sharki dzakashambira makungwa makore 400 miriyoni apfuura, zvichiita kuti ive imwe yemhando dzekare dzemhuka munyika.
Iyo pygmy shark ndiyo idiki pane 25 centimita pakureba, nepo whale shark ndiyo yakarebesa pamamita gumi nemana. Whale shark ndiyo shark inorema kwazvo: Inosvika matani gumi nemaviri, inorema zvinosvika gumi mota diki. Pakazara kune marudzi anopfuura mazana mashanu emashaki.
Shark ane mazino akakosha: mamwe mitsara inokura kuseri kwemutsara wekutanga wemazino. Kana mazino akadonha pakurwa nedzimwe mhuka, mazino anotevera anokwira kumusoro. Nenzira iyi, shark "inopedza" mazino anosvika 30,000 XNUMX muhupenyu hwayo.
Ganda reShark harina kugadzirwa nemakero akajairwa, asi nechinhu chimwe chete nemazino avo. Zviyero izvi zvinonzi "mazino eganda". Iri ganda rinotsvedzerera pakubata kubva mumusoro kusvika kune caudal fin, uye rough neimwe nzira.
Ko shaki dzinorarama sei?
Shark ichiri kutsvagirwa zvisina kunaka, saka zvishoma zvinozivikanwa nezvavo. Zvisinei, chimwe chinhu chinokosha chinozivikanwa: shark dzinofanira kuramba dzichifamba kuitira kuti dzirege kunyura pasi pegungwa. Imhaka yekuti, kusiyana nedzimwe hove, hadzina dundira rekushambira rakazadzwa nemhepo.
Mhando zhinji dze shark dzinodya hove nezvimwe zvisikwa zvikuru zvemugungwa. Asi mamwe emarudzi makuru eshaki anodya plankton, idzo mhuka diki kana zvirimwa zvinoyangarara mumvura. Munyika yose, vanhu vanenge vashanu vanourayiwa ne<em>shark gore negore.
Shark ane vavengi: mashaki madiki anodyiwa nemwaranzi uye hombe shark. Shark zvakare pane menyu yeshiri dzegungwa uye zvisimbiso padyo nemhenderekedzo. Killer whales zvakare inovhima hombe shark. Zvisinei, muvengi mukuru weshaki vanhu vane utava hwavo hwokuredza. Nyama ye shark inoonekwa sechinhu chinonaka, kunyanya muAsia.
Ko shaki dzine vana vadzo sei?
Kuberekwa kweShark kunotora nguva yakareba: mamwe mashaki anofanira kunge ane makore makumi matatu asati asangana kekutanga. Dzimwe mhuka dzinokandira mazai pasi pegungwa. Mai havachengeti ivo kana vana. Vazhinji vanodyiwa semazai kana sepwere.
Dzimwe shark dzinotakura vashoma vanogara vaduku mumatumbu avo makore maviri oga oga. Ikoko vanokura kubva pahafu yegore kusvika anenge makore maviri. Panguva iyi, dzimwe nguva vanodyana. Vakasimba chete ndivo vanozvarwa. Ipapo dzinenge dzakareba hafu yemamita.
Mhando dzakawanda dzeshark dziri kutyisidzirwa nekutsakatika. Izvi hazvisi chete nekuda kwevanhu uye vavengi venyama. Imhaka yekuti shark dzinofanirwa kuchembera dzisati dzatombobereka.