Shark, bloodthirsty predator, cua daj cua dub seas thiab oceans, xob laim ceev tawm tsam, txoj kev khuv leej tsis paub hais tias yog tuag tau. Qhov no luv luv, tab sis yeej muaj tseeb characterization tsuas yog siv rau peb hom ntawm sharks. Tsis tshua muaj neeg ceev thiab txhoj puab heev plaub-meter shark "Mako", Brown tuag. Ib tug loj dawb shark, ntev ntawm 6.7 meters, ib tsab ntawm tus dab nyob rau hauv cov yeeb yam "Puab tsaig". Thiab cov Tsov shark, ib tug tsib-Meter ntev, feem ntau tsis ntshai abtsi, tau mus tua txawm tias ib tug whale. Tsuas yog peb sharks ntawm ntau tshaj 400 hom. Tus so ntawm lub sharks yog tsawg txaus ntshai vim hais tias ntawm lub slowness yog tsis heev txhoj puab heev thiab feem ntau tsuas cowardly cim. Txawm li cas los, yog hais tias tus shark yog tshaib plab, nws ua heev txaus ntshai. Thiab yog hais tias ib tug shark mam li nco dheev tsw tus ntxhiab tsw ntawm cov ntshav, nws instantly pereklinivaet thiab nws ua ib tug tua tshuab.
Cov feem ntau txaus ntshai sharks yog thermophilic, lo los ze zog mus rau lub ncaj. Lub nyiam vaj tse rau Mako thiab tsov shark - nws yog sov dej nyob rau hauv lub chaw ntug hiav cheeb tsam. Ib tug poj dawb shark pom tau tias thaum twg tus taw tes nyob rau hauv lub seas thiab oceans. Sharks, zoo li marine lub neej, tsis muaj tus pab tsiaj xav, thiab heev tsis tshua muaj favored. Lawv xav mus plob hav zoov ib leeg, thiab tsuas yog thaum lub sij hawm yug me nyuam rau lub caij yuav pib sib txuas lus nrog txhua lwm yam. Tsheej lab ntawm cov xyoo ntawm cov hav zoov - li ntawd, ntev evolution ib zaug thiab rau tag nrho cov txhais lub sij hawm tsis pub tshaj shark lub neej thiab lwm yam, nws yeej yuav tsis ua.
Lub ntsiab thiab tsuas yog ua tsov rog ntawm lub hiav txwv predator - nws yog cov hniav, lub puab tsaig los yog es nrog ob peb kab ntawm cov hniav. Yuav ua li cas muaj ntau yam kab ntawm cov hniav nyob rau hauv ib tug shark, nyob ntawm seb nws hom. Lub load rau hauv lub shark hniav unprecedented, nws muaj txaus cov hniav txhua yam indiscriminately, tawg hniav, crumble thiab lub caij nplooj zeeg. Yog li ntawd, cov xwm tau noj saib xyuas ntawm cov predator, ib tug shark thiab muaj ib tug kev tshuaj ntsuam genetic mechanism ntawm qhov kev hloov ntawm cov hniav. Qhov no tus txheej txheem yog ceev, thiab nws txiav txim yuav ua li cas muaj ntau yam cov hniav ib tug shark yuav nyob rau hauv lub nyob ze yav tom ntej. Cyclicity ntawm cov kev hloov ntawm cov hniav txog ib zaug txhua txhua ob lub lis piam nyob rau hauv cov tub ntxhais tsiaj thiab ib zaug nyob rau hauv ob lub hlis nyob rau hauv cov laus sharks. Thiab tshiab hniav tsis loj hlob nyob rau hauv lub site poob, thiab twb yog npaj txhij, nias tiv thaiv ntawm cov pos hniav. Laus cov hniav mus, ib tug tshiab series ntawm thiab npaj txhij mus. Yog li, lub shark yeej ib txwm tshuav ib tug ob peb kab ntawm tshiab hniav, thiab cov lus nug ntawm yuav ua li cas muaj ntau yam cov hniav ib tug shark, tsis tsim nyog nws desperately.
Piv txwv li, lub dawb shark thiab tsov yeej ib txwm "ib tug pas ntawm cov hniav." Txhua 4-6 kab tais rov qab thiab nias, muaj mus txog rau 300 cov hniav. Muaj ob peb npaj siab rau suav tus xov tooj ntawm cov hniav ntawm tus shark whale. Nws puv tawm txog 15 txhiab. Tus duab ntawm txhua hniav nyob rau hauv txawv sharks, dhau lawm, yog cov sib txawv. Classical voos nyob rau hauv dawb shark hniav thiab complex nrhiav nrog me me notches rau ntawm cov npoo ntawm cov tsov shark. Ib txhia hom shark hniav lus, dog dig paub daws teeb daim ntawv. Ntawm lub hauv paus mus rau lub ntsis ntawm tus hniav yog nkhaus thiab yuav nyias. Qhov no hniav yog tsis undershot ib yam dab tsi nyuaj, tab sis yog hais tias nws clung rau tej cev nqaij daim tawv, nws yuav nruj nreem, tsis txhob cia mus. Tej cov hniav nyob rau hauv lub puab tsaig ntawm ib tug shark yog feem ntau tsawg vim hais tias lawv yuav tsis mus ua txhaum. Lub hom phiaj ntawm cov hniav kom rhuav lub cev nqaij daim tawv ntawm tus neeg, es tsis txiav thiab tsuav nws.
Tej zaum sharks thaum mus tua tsiaj ntawm lub nce ob los yog peb kab ntawm cov hniav, tab sis nco ntsoov muab kev koom tes xwb pem hauv ntej kab ntawm ob lub saum thiab hauv qab puab tsaig. Shark lub puab tsaig thiab cov hniav - nws yog ib tug complex thiab nyob rau tib lub sij hawm zoo-tsim system. Xwm tau muab ib tug ko taw sharks, piv txwv li, me hniav, tab sis, nrog sharpened npoo, nws yog yooj yim los mus tom los ntawm cov neeg zoo li ntawm crabs thiab lobsters, chitin zoo li ntawm crabs thiab tus qwj hiav txwv. Tab sis nws tsis paub hais tias yuav ua li cas muaj ntau yam shark hniav, yog hais tias nws nyob rau hauv lub hauv qab tsam, ib txhia muaj ntau, ib co tsawg. Sharks ua luam dej rau hauv lub Upper txheej ntawm lub cev ntawm cov dej, pub rau cov ntsaws ruaj ruaj thiab foob, muab los ntawm qhov ntev nkhaus kinzhaloobraznye hniav uas chob sib sib zog nqus rau hauv lub cev ntawm tus neeg mob. Thiab raws li nyob rau hauv lub xov tooj ntawm cov hniav Niam Xwm tsis txwv leej twg, thiab cov lus nug ntawm yuav ua li cas muaj ntau yam cov hniav ib tug shark, muaj no tsuas muaj ib lo lus teb: "raws li ntev raws li tsim nyog."