Qwj hauv dej thoob dej yug ntses ua haujlwm tseem ceeb - lawv pab tu cov av thoob dej yug ntses, tshem tawm cov qoob loo ntawm algae, tsis txhob noj cov zaub mov ntses. Hauv qog, qwj yog cov kws kho mob thoob plaws hauv thoob dej yug ntses - yooj yim nkag mus rau hauv qhov chaw mus rau qhov chaw, lawv pab tswj xyuas kom huv.
Tus qauv tsim ntawm cov thoob dej yug ntses ua ntau ntau thiab nthuav nrog muaj cov snails, tab sis nws yog ib qhov tsim nyog yuav tau ua tib zoo saib xyuas lawv qhov kev luam, uas tshwm sim sai sai. Tshaj dhau ntawm dej thoob dej yug ntses nrog cov qwj ua rau tsis muaj oxygen, thiab yog hais tias tsis tshua muaj zaub mov noj, cov qwj yuav pib noj cov nroj tsuag thoob dej yug ntses, yog li koj yuav tsum paub ua li cas qwj hauv qhov thoob dej yug ntses thiab yuav ua li cas los tswj cov txheej txheem no.
Varied hom qoob loo thoob dej yug ntses
Kev xaiv ntawm snails rau cov thoob dej yug ntses yuav tsum tau ua tib zoo saib xyuas. Qhov loj tshaj thiab ntxim nyiam tshaj plaws snails yog ampularia. Nws yog qhov zoo los saib seb cov qwj ntawm ampularia muab ntau npaum li cas hauv ib thoob dej yug ntses. Qhov kev xyuam xim rau txoj kev no yog qhov nce hauv tsoom fwv tshav kub.
Qhov no zoo ntawm snails yog dioecious, yog li mating tshwm sim ntawm tus poj niam thiab tus txiv neej. Tom qab ntawd tus poj niam pib tshawb cov phab ntsa hauv cov thoob dej yug ntses thiaj li yuav nrhiav tau qhov chaw siab tshaj plaws uas nws yuav ua rau lub pob txha. Qhov no tshwm sim feem ntau thaum yav tsaus ntuj, cov qe ua qoob loo saum cov dej theem. Qwj me nyuam mos liab tshwm sim tom qab 2-4 lub lis piam, cov dej kub rau qhov no yuav tsum yog yam tsawg 25 degrees.
Cov qos daj yog nrov nrov, lawv yog cov kab mob ntau yam ntawm ampullaria. Tus qwj daj ua li cas rau hauv cov thoob dej yug ntses? Lub hauv paus ntsiab lus ntawm kev lag luam daj yog, ntawm chav kawm, raws nraim tib yam li lub ampullaria ntawm lwm yam xim. Luam ntawm no tsiaj ntawm snails tsis yog complex thiab tsis yuav tsum tau kev pab ntawm ib tug aquarist.
Feem ntau pom nyob rau hauv thoob dej yug ntses thiab kauj qwj. Kom nkag siab tias cas coil snails multiply hauv ib thoob dej yug ntses, koj yuav tsum paub tias lawv yog cov hermaphrodites. Tom qab nws tus kheej fertilization, lub qwj lays qe, siv nplooj ntawm cov nroj tsuag rau qhov no. Cov qe pw rau hauv cov nroj tsuag thoob dej yug ntses yog ib qho nyuaj, feem ntau ntawm cov thoob dej ntses ntses tsis siv lawv rau zaub mov noj. Vim li no, kev luam ntawm qwj ntawm cov coils tshwm sim ntawm kev kub ceev, cov thoob dej yug ntses tuaj yeem ua rau lawv mus txog li qhov uas lawv coj mus rau feem ntau ntawm qhov chaw, vim li ntawd yuav tsum ua tib zoo saib xyuas, thaum lub sij hawm muab ntau lub qe.