Ua tus ceg ntoo squeak thaum koj noj lawv?

Thaum crayfish raug pov rau hauv dej npau npau, ib lub suab zoo li squeak tau hnov. Tab sis qhov tseeb, crayfish tuag tam sim ntawd (tshwj xeeb tshaj yog tias koj muab lawv tso rau hauv dej npau kom raug, uas yog, lub taub hau), lawv tsis tuaj yeem squeak, thiab yog li ntawd kev khuv leej los ntawm squeak yog kiag li tsis muaj dab tsi.

Qhov tshwm sim no yog vim muaj qhov tseeb tias cov pa tawm hauv qab ntawm lub khauj khaum nrog lub suab muaj tus yam ntxwv. Chav pib tsub zuj zuj nyob rau hauv qhov chaw hauv qab carapace. Ntev dhau los, lub siab txhim tsa, thiab cov pa taws tau pib thawb tawm hauv nws cov cawv. Txhawm rau pom qhov qhib ntawm qhov dej twg tuaj yeem khiav dim, nws mus sab nraud. Cov txheej txheem ntawm cov quav tso tawm chav yog nrog nws cov suab lus nrov. Raws li txoj cai, thaum npau suav crayfish, lub suab muaj suab nrov tau hnov ​​hauv thawj ob peb feeb.

Nws tseem yuav tshwm sim vice versa - crayfish Tsis txhob squeak thaum ua nojthiab cov neeg noj khoom paub dhau los tuaj yeem tso siab rau qhov no. Tseeb, daim paib tsis zoo heev - feem ntau yuav yog, tus xaum ntses tsis yog lub zoo tshaj, lawv tau tswj kom nyob hauv huab cua thiab qhuav zoo.

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