Yadda ake yin hukunci game da jinsi na dinosaurs?

Kusan dukkan halittu masu rai suna haihuwa ta hanyar haihuwa ta hanyar jima'i,sodinosaurs. Halayen jinsi na dabbobi masu rai galibi suna da bayyanar waje a bayyane, don haka yana da sauƙin bambance maza da mata. Misali, mazan dawisu suna da gashin wutsiya masu kyau, mazan zakoki suna da dogayen majina, kuma mazan dawisu suna da ƙaho kuma sun fi mata girma. A matsayin dabbar Mesozoic, an binne ƙasusuwan dinosaura ƙarƙashinƙasa tsawon shekaru miliyan da yawa, da kuma kyallen takarda masu laushiwandayana iya nuna jinsina dinosaurssun ɓace, don haka da gaske nemai wahaladon bambance jinsin dinosaurs! Yawancin burbushin da aka samu ƙashi nes, kuma kaɗan ne kawai daga cikin ƙwayoyin tsoka da abubuwan da aka samo daga fata za a iya adana su. To ta yaya za mu yi hukunci game da jinsin dinosaur daga waɗannan burbushin halittu?

Bayanin farko ya dogara ne akan ko akwai ƙashi medullary. Lokacin da Mary Schweitzer, masanin ilmin halittu a Jami'ar North Carolina da ke Amurka, ta gudanar da bincike mai zurfi kan "Bob" (burbushin tyrannosaur), ta gano cewa akwai wani ƙashi na musamman a cikin ƙasusuwan burbushin halittu, wanda suka kira layin ƙashi na bargo. Layin ƙashi yana bayyana ne a lokacin haihuwa da kwanciya na tsuntsayen mata, kuma galibi yana samar da sinadarin calcium ga ƙwai. An kuma ga irin wannan yanayi a cikin dinosaur da yawa, kuma masu bincike za su iya yanke hukunci game da jinsin dinosaurs. A cikin binciken, femur na wannan ƙashin dinosaur ya zama babban abin da ke gano jinsin dinosaurs, kuma shine mafi sauƙin kashi don gano jinsi. Idan aka sami wani Layer na ƙashi mai ramuka a kusa da ramin medullary na ƙashin dinosaur, za a iya tabbatar da cewa wannan dinosaur mace ce a lokacin kwanciya. Amma wannan hanyar ta dace ne kawai ga dinosaurs da dinosaurs masu tashi waɗanda suke shirye su haihu ko kuma sun haihu, kuma ba za su iya gano dinosaurs waɗanda ba su da juna biyu ba.

Na biyusanarwa shine a bambance shi bisa ga kambin dinosaur. Masana ilmin kayan tarihi sun taɓa tunanin hakanjinsi za a iya bambanta shi da alamun dinosaur, wata hanya da ta dace musamman ga Hadrosaurus. A cewariyakana rashin ƙarfi da matsayi na "kambi"naHadrosaurus, ana iya bambanta jinsi. Amma shahararren masanin ilmin halittu Milner ya musanta wannan, Hukumar Lafiya ta Duniyasaid, "Akwai bambance-bambance a cikin rawanin wasu nau'ikan dinosaur, amma wannan za a iya yin hasashe ne kawai da kuma hasashensa." Duk dasake suna bambance-bambancetsakanin A cikin zane-zanen dinosaur, masana ba su iya tantance waɗanne siffofi ne na jikin mutum ba, kuma waɗanne ne mata.

Magana ta uku ita ce a yanke hukunci bisa ga tsarin jiki na musamman. Tushen shine cewa a cikin dabbobi masu rai da dabbobi masu rarrafe, maza yawanci suna amfani da tsarin jiki na musamman don jawo hankalin mata. Misali, ana ɗaukar hancin biri na proboscis a matsayin kayan aiki da maza ke amfani da shi don jawo hankalin mata. Ana tsammanin wasu sifofin dinosaur ana amfani da su don jawo hankalin mata suma. Misali, hancin spiny na Tsintaosaurus spinorhinus da kambin Guanlong wucaii na iya zama makamin sihiri da maza ke amfani da shi don jawo hankalin mata. Duk da haka, babu isassun burbushin halittu da za su tabbatar da wannan tukuna.

Magana ta huɗu ita ce a yi hukunci da girman jiki. Manyan dinosaurs masu ƙarfi na nau'in iri ɗaya na iya zama maza. Misali, ƙoƙon kan namiji na Pachycephalosaurus ya fi na mata nauyi. Amma wani bincike da ya ƙalubalanci wannan magana, yana nuna bambancin jinsi a wasu nau'in dinosaur, musamman Tyrannosaurus rex, ya haifar da babban son zuciya a cikin jama'a. Shekaru da yawa da suka gabata, wata takarda ta bincike ta yi iƙirarin cewa T-rex na mace ya fi T-rex na namiji girma. Duk da haka, wannan ya dogara ne kawai akan samfuran kwarangwal guda 25 marasa cikawa. Muna buƙatar ƙarin ƙashi don cikakken nazarin halayen jinsi na dinosaurs.

Yana da matuƙar wahala a tantance jinsin dabbobin da suka mutu a zamanin da ta hanyar burbushin halittu, amma bincikensu ya fi amfani ga masana kimiyyar zamani kuma yana da tasiri mai mahimmanci akan halayen rayuwar dinosaurs. Duk da haka, akwai misalai kaɗan a duniya waɗanda za su iya yin nazarin jinsin dinosaurs daidai, kuma akwai ƙalilan masu binciken kimiyya a fannoni masu alaƙa.

Kawah Dinosaur Official Website:www.kawahdinosaur.com