Yuav ua li cas lawv xav tau qhov chaw nyob? Lampreys xav tau kwj merau spawning thiab rau larvae. Cov larvae burrow mus rau hauv qab ntawm ntshiab, mus tas li ntws ntws thiab lim pub rau 3 mus rau 6 xyoo ua ntej lawv hloov mus rau cov neeg laus theem thiab nkag mus rau hauv tus dej los yog reservoir.
lub teeb nyob qhov twg?
Sea lampreys yog ib txwm nyob rau Dej Hiav Txwv Atlantic, Lake Ontario thiab St. Lawrence River. Lawv kis mus rau lwm qhov Great Lakes ntawm cov kwj dej uas hla tej yam ntuj tso. Lawv tau lees paub hauv Lake Erie xyoo 1921, Lake Michigan xyoo 1936, Lake Huron xyoo 1937, thiab Lake Superior hauv 1938.
Lampreys puas noj tau tib neeg?
Kev kawm txog lub plab cov ntsiab lus ntawm qee cov lampreys tau pom qhov seem ntawm cov hnyuv, fins thiab vertebrae los ntawm lawv cov tsiaj txhu. Txawm hais tias kev tawm tsam rau tib neeg tshwm sim, lawv feem ntau yuav tsis tawm tsam tib neeg tshwj tsis yog tias tshaib plab.
Lub teeb txav li cas?
Ntau yam tsiaj - suav nrog tib neeg - ua luam dej by thawb rau dej. Qhov no ua rau lub siab zoo, uas txhawb nqa lawv mus tom ntej. Tab sis limbless lampreys kuj tsim me ntsis whirlpools - vortices ntawm tsis zoo siab - nyob rau hauv pem hauv ntej ntawm lawv lub cev thaum lawv nab lawv txoj kev los ntawm dej. Qhov "nqus" tsab ntawv tsa suab rub lawv nrog.
Yuav ua li cas yog lub teeb taws tom koj?
Parasitic lampreys tua thiab latch mus rau lwm cov ntses. Siv lawv cov kab hniav thiab tus nplaig, lawvzom rau hauv tus tswv tsev thiab kos cov ntshav thiab lwm cov kua dej. … Thaum lawv tawm tsam, lawv feem ntau tua lawv tus tswv, thiab txawm tias cov neeg raug tsim txom uas muaj txoj sia nyob yuav tsum siv lub zog ntau heev kom rov qab los ntawm lawv qhov txhab.
