Vim li cas cov qe muaj qhov tsis meej thiab ntse kawg?

2024 Tus sau: Seth Attwood | [email protected]. Kawg hloov kho: 2023-12-16 16:06

Ntau tus noog lub qe yog sharpened ntawm ib kawg los tiv thaiv lawv los ntawm dov tawm ntawm zes nyob rau ntawm qhov chaw tsis sib xws. Qhov no yog qhov xaus los ntawm biologists uas tau soj ntsuam lub neej ntawm Arctic noog thiab luam tawm lawv cov kev tshawb pom nyob rau hauv phau ntawv Journal of Experimental Biology.

"Peb pom tias qhov sib txawv ntawm qhov loj me ntawm qhov kawg ntawm qhov kawg thiab qhov kawg ntawm lub qe muaj qhov cuam tshuam zoo tshaj plaws ntawm qhov nrawm nrawm npaum li cas nws dov mus rau qhov siab. Qhov no piav qhia tias yog vim li cas guillemots thiab ntau lwm cov noog uas zes ntawm pob zeb thiab cov ntug dej hiav txwv nteg qe asymmetrical, "hais tias Mark Hauber ntawm University of Illinois ntawm Chicago, USA.

Cov qe ntawm ntau cov noog, tsis zoo li crocodiles, dinosaurs thiab lwm yam tsiaj reptiles, feem ntau conical thiab elongated heev. Yuav ua li cas no txawv txawv feature ntawm qe sawv thiab dab tsi lub luag hauj lwm nws ua si nyob rau hauv lub evolution ntawm noog tau ntev txhawj xeeb tsis tau tsuas yog lub midgets ntawm "Gulliver", tab sis kuj evolutionary zaum.

Piv txwv li, lawv tsis ntev los no tau pom tias qhov dav dav ntawm lub qe thiab qib ntawm nws qhov elongation tsis nyob ntawm qhov loj ntawm cov noog, tab sis nyob ntawm seb nws ya tau zoo npaum li cas thiab ntau npaum li cas nws ua nws. Kev tshawb pom zoo li no tau ua rau Hauber thiab nws cov npoj yaig xav txog seb qhov sib txawv ntawm qhov loj ntawm cov qe thiab ntse kawg ntawm cov qe tuaj yeem tshwm sim thaum lub sij hawm hloov pauv ntawm cov noog.

Muab piv cov clutches ntawm cov noog sib txawv, cov kws tshawb fawb tau ua tib zoo saib rau lub qe txawv txawv ntawm cov tuab-billed guillemots, zoo ib yam li cov pear. Guillemots nyob hauv cov noog thaj tsam dhau ntawm Arctic Circle, teeb tsa cov cheeb tsam loj ntawm cov pob tsuas uas nyob rau ntawm ntug dej hiav txwv Arctic.

Thaum lub caij yug me nyuam, lawv tsim khub thiab tso lawv cov qe ncaj qha rau ntawm pob zeb, ua zes ntawm ntug pob tsuas. Qhov tseeb no tau ua rau cov kws tshawb fawb xav tias cov pear zoo li cov qe murre tuaj yeem pab lawv kom lawv nyob hauv qhov chaw thiab tsis swb rau hauv qhov tob tob.

Lawv tshawb xyuas seb qhov no puas yog tiag tiag los ntawm 3D-luam tawm ntau lub kaum os cov qe ntawm guillemots thiab lwm cov noog, uas muaj ntau "symmetrical" zoo li. Raws li nws muab tawm, taw qhia qe dov ntau zuj zus ntawm qhov chaw sloped tshaj lawv cov sib tw sib tw.

Interestingly, ntev thiab "nyias" qe dov zoo dua li lwm yam dummies, tab sis cov yam ntxwv zoo li no tau cuam tshuam qhov tshwm sim ntawm lawv "kev khiav tawm" los ntawm lub zes ntau dua li qhov sib txawv ntawm qhov loj ntawm blunt thiab ntse kawg.

Ib yam li ntawd, raws li Hauber thiab nws cov npoj yaig, evolution tuaj yeem cuam tshuam rau lwm yam khoom ntawm cov qe, nrog rau cov qe thiab dawb loj, tag nrho cov qe hnyav, thiab lwm yam khoom uas cuam tshuam rau seb tus noog cov xeeb ntxwv muaj sia nyob lossis tuag.

Kev kawm lawv yuav pab peb nthuav tawm cov lus zais ntawm cov feathered dinosaurs hloov mus rau cov noog thiab lawv nyob li cas.