Indlela yokwahlulela ubulili bama-dinosaurs?

Cishe zonke izilwane eziphilayo ezinomgogodla zizalana ngokuzalana ngokocansi,sowenza ama-dinosaurs.Izici zobulili zezilwane eziphilayo ngokuvamile zinezibonakaliso zangaphandle ezisobala, ngakho-ke kulula ukuhlukanisa abesilisa nabesifazane.Ngokwesibonelo, amaphigogo angamaduna anezimpaphe zomsila ezinhle, amabhubesi angamaduna anomhlwenga omude, kanti amaphigogo angamaduna anezimpondo futhi makhulu kunezinsikazi.Njengesilwane saseMesozoic, amathambo ama-dinosaurs angcwatshwengaphansiumhlabathi amashumi ezigidi zeminyaka, kanye nezicubu ezithambileokuyintoingakhombisa ubuliliama-dinosaurszinyamalele, kunjalo ngempelanzimaukuhlukanisa ubulili bama-dinosaurs!Iningi lezinsalela ezitholakele zingamathambos, futhi zimbalwa kakhulu izicubu zemisipha kanye nokuphuma kwesikhumba okungalondolozwa.Ngakho-ke sibuhlulela kanjani ubulili bama-dinosaurs kulezi zinsalela?

Isitatimende sokuqala sisekelwe ekutheni kukhona ithambo le-medullary.Lapho uMary Schweitzer, isazi semivubukulo e-University of North Carolina e-United States, enza ucwaningo olunzulu lwe-“Bob” (insalela ye-tyrannosaur), wathola ukuthi kunongqimba lwamathambo olukhethekile emathanjeni amathambo, abalubiza ngokuthi. ungqimba lomnkantsha.Ungqimba lomnkantsha luvela ngesikhathi sokuzala kanye nokubekela izinyoni zezinsikazi, futhi ikakhulukazi inikeza i-calcium emaqanda.Isimo esifanayo siphinde sabonakala kuma-dinosaurs amaningana, futhi abacwaningi bangenza izinqumo mayelana nobulili bama-dinosaurs.Ocwaningweni, i-femur yale nsalela ye-dinosaur ibe yisici esibalulekile ekuhlonzeni ubulili bama-dinosaurs, futhi iyithambo elilula kakhulu ukukhomba ubulili.Uma ungqimba lwezicubu zethambo ezinezimbotshana lutholakala eduze komgodi we-medullary wethambo le-dinosaur, kungaqinisekiswa ukuthi lena idayinaso yesifazane ngesikhathi sokubeka.Kodwa le ndlela ifaneleka kuphela ama-dinosaur endizayo nama-dinosaurs alungele ukuzala noma abelethe, futhi angakwazi ukuhlonza ama-dinosaurs angakhulelwe.

Owesibiliisitatimende ukuhlukanisa ngokusekelwe ku-crest yama-dinosaurs.Abavubukuli bake bacabanga kanjaloubulili yayingahlukaniswa ngamaqoqo ama-dinosaurs, indlela eyayifaneleka ngokukhethekile i-Hadrosaurus.Ngokusho kweububanziubuncane kanye nesikhundla”umqhele” kweI-Hadrosaurus, ubulili bungahlukaniswa.Kodwa isazi se-paleontologist esidumile uMilner uyakuphikisa lokhu, I-WHOsaid, “Kunomehluko emiqheleni yezinhlobo ezithile zezibankwakazi, kodwa lokhu kungacatshangwa kuphela futhi kucatshangwe.”Naphezu kwekabusha umehlukophakathi ama-dinosaur crests, ochwepheshe abakwazanga ukusho ukuthi yiziphi izici ze-crest ezingamadoda nokuthi yiziphi abesifazane.

Isitatimende sesithathu siwukwenza izahlulelo ezisekelwe esakhiweni somzimba esiyingqayizivele.Isisekelo siwukuthi ezilwaneni ezincelisayo eziphilayo kanye nezilwane ezihuquzelayo, owesilisa ngokuvamile usebenzisa izakhiwo ezikhethekile zomzimba ukuheha abesifazane.Ngokwesibonelo, ikhala lenkawu libhekwa njengethuluzi elisetshenziswa abesilisa ukuze bahehe abesifazane.Ezinye izakhiwo zama-dinosaurs kucatshangwa ukuthi zisetshenziselwa ukuheha abesifazane.Ngokwesibonelo, ikhala eli-spiny le-Tsintaosaurus spinorhinus kanye nomqhele we-Guanlong wucaii kungase kube isikhali somlingo esisetshenziswa abesilisa ukuze bahehe abesifazane.Nokho, awekho izinsalela ezanele zokuqinisekisa lokhu okwamanje.

Isitatimende sesine esokwahlulela ngobukhulu bomzimba.Izibankwakazi ezikhulile ezinamandla zohlobo olufanayo kungenzeka ukuthi kwakungamadoda.Isibonelo, ugebhezi lwekhanda le-Pachycephalosaurus yesilisa lubonakala lusinda kakhulu kunezabesifazane.Kodwa ucwaningo olubekela lesi sitatimende inselele, oluphakamisa umehluko wobulili kwezinye izinhlobo zama-dinosaur, ikakhulukazi i-Tyrannosaurus rex, luholele ekukhetheni okukhulu kwengqondo emphakathini.Eminyakeni eminingi edlule, iphepha lokucwaninga lathi i-T-rex yabesifazane yayinkulu kune-T-rex yesilisa.Kodwa-ke, lokhu kwakusekelwe kuphela kuma-skeleton angama-25 angaphelele.Sidinga amathambo amaningi ukuze sihlaziye ngokugcwele izici zobulili zama-dinosaurs.

Kunzima kakhulu ukunquma ubulili bezilwane ezashabalala ezikhathini zasendulo ngokusebenzisa izinsalela, kodwa ucwaningo lwazo luzuzisa kakhulu ososayensi banamuhla futhi lunethonya elibalulekile emikhubeni yokuphila yama-dinosaurs.Kodwa-ke, kunezibonelo ezimbalwa kakhulu emhlabeni ezingakwazi ukufunda ngokunembile ubulili bama-dinosaurs, futhi bambalwa kakhulu abacwaningi besayensi emikhakheni ehlobene.

Iwebhusayithi esemthethweni ye-Kawah Dinosaur:www.kawadinosaur.com