imvakalelo yokuvumba ebukhali kakhulu
Ookrebe banesinye sezivamvo zokujoja kakhulu kwizilwanyana. Ziyakwazi ukubona iikhemikhali ezincinci emanzini, ezivumela ukuba zifumane ixhoba kwaye zifumane indlela yazo ejikeleze ulwandle. Ezinye iintlobo zookrebe zinokubona ithontsi legazi elixutywe kwizigidi zeelitha zamanzi.
Ukongeza, imvakalelo yokuvumba kakrebe ayiloncedo kuphela ekuboneni ixhoba, kodwa nasekufumaneni amalungu eentlobo zayo ngamaxesha okukhwelana. Le mvakalelo ibukhali kangangokuba ziyakwazi ukubona utshintsho lwemichiza emanzini xa zikude kakhulu, nto leyo ezenza zikwazi ukukhwelana ngokufanelekileyo.
amazinyo rhoqo replaceable
Olunye lweempawu ezaziwa kakhulu kookrebe ngamazinyo abo abukhali. Into enokukothusa kukuba ezi zilwanyana ziyakwazi ukutshintsha amazinyo azo ubomi bazo bonke. Njengoko amazinyo esikala okanye esonakala, amazinyo amatsha akhula ngokukhawuleza ukuze athathe indawo yawo.
- Ookrebe banokuba nemiqolo eyi-15 yamazinyo emlonyeni wabo, kwaye izinyo ngalinye linokutshintshwa kwiiveki ezimbalwa. Oku kuqinisekisa ukuba bahlala benamazinyo asebenzayo okubambisa kunye nokukrazula amaxhoba abo.
Ukukwazi ukubona iindawo zombane
Ookrebe banesakhono esikhethekileyo phakathi kwezilwanyana zaselwandle, ukukwazi ukubona amasimi ombane ngokusebenzisa amalungu amancinci abizwa Lorenzini ampoules, ezisemathatheni azo. La malungu awenza akwazi ukuva umbane oveliswa zezinye izinto eziphilayo, kwanakwimigama emifutshane.
Obu buchule bubanceda bakhangele kwaye bafumane ixhoba elifihlwe esantini okanye babone abanye ookrebe. Ukongeza, zikwanovelwano kumhlaba wemagnethi womhlaba, ezivumela ukuba ziziqhelanise kwaye zihambe elwandle.
Abanye ookrebe ba-viviparous
Ngokuqhelekileyo, ookrebe banokuzala ngeendlela ezintathu ezahlukeneyo: i-oviparous (iqanda lokubeka amaqanda), i-viviparous (ukuzala ukuhlala umncinci), kunye ne-ovoviviparous (amaqanda akhula ngaphakathi komama kwaye azalwe ephila). Enye yezinto ezibangela umdla kukuba ezinye iindidi zookrebe, ezifana nehammerhead shark kunye nenkunzi shark, ziphila ubomi bentshontsho.
Oku kuthetha ukuba ulutsha lukhula ngaphakathi emzimbeni kamama kwaye luzalwa luphila. Kwezinye iimeko, aba bantwana banokude basebenzise i-intrauterine cannibalism, apho i-embryo eyomeleleyo isondla abo babuthathaka ngaphambi kokuba bazalwe.
Izantya ezinkulu kunye nohlengahlengiso lokuhlaselwa
Ookrebe baziqhelanise ngokugqibeleleyo ukuze bahambe ngesantya esiphezulu kunye nokuhlasela amaxhoba abo. Imizimba yazo elungeleleneyo iwavumela ukuba adade ngokukhawuleza nangokuthe cwaka emanzini, yaye izihlunu zawo ezinamandla ziwanika amandla amakhulu okuhlasela ixhoba lawo.
Ukongeza, ookrebe baneendlela ezahlukeneyo zokuhlasela, kuxhomekeke kwiintlobo zabo kunye nexhoba abanomdla kulo. Ngokomzekelo, yena Ukrebe omhlophe inokutsiba iphuma emanzini ukuze ibambe iintini nezinye izilwanyana ezanyisayo zaselwandle.
Ezi zezinye zezibakala ezibangela umdla ngookrebe, kodwa kukho nezinye ezininzi. Njengoko uphando lwebhayoloji yaselwandle luhambela phambili, ngokungathandabuzekiyo siya kuqhubeka sifumanisa izinto ezintsha ezimangalisayo zezi zilwanyana zinamandla olwandle. Ubutyebi obungenasiphelo bezinto eziphila elwandle busikhumbuza ngokubaluleka kokulondoloza nokukhusela iilwandle zethu.