Mary Allen
Cov sturgeons yuav tsum tau khaws cia rau hauv lub pas dej hauv vaj txhua lub sijhawm thiab nyob rau hauv qhov xwm txheej twg kev khaws cia tau piav qhia tias yog "tsim-tsim"? Peb xav daws cov lus nug no thiab lwm cov lus nug hauv qhov nkag.
Cov ntaub ntawv ntawm Sturgeon
Lub sturgeon yog cov ntses pob txha, txawm hais tias nws lub cev pob txha tsuas yog ib nrab ossified. Cov duab ntawm lub cev thiab kev ua luam dej ua rau lawv zoo li yuav luag tseem ceeb, ntxiv rau cov pob txha tawv tawv ntawm nws nraub qaum, thiab nws twb ntseeg tias sturgeons muaj nyob ib ncig ntawm 250 lab xyoo. Tag nrho cov nyob rau hauv tag nrho cov, sturgeons yog tsis muaj teeb meem, kaj siab lug, thiab muaj zog ntses uas nyiam txias, oxygen-nplua nuj dej. Sab nraum zoov zoo heev cuam tshuam ntau qhov chaw nyob, los ntawm cov dej mus rau hiav txwv - koj tuaj yeem pom lawv nyob hauv ntau qhov chaw.
Lawv txhua tus muaj qhov sib xws yog lawv lub peev xwm ua luam dej: Lawv yog cov neeg ua luam dej tsis tu ncua thiab ua haujlwm tas li, uas yog vim li cas lawv siv ntau qhov chaw. Thaum nruab hnub lawv feem ntau nyob hauv av, tab sis tshwj xeeb tshaj yog thaum tsaus ntuj lawv qee zaum ua kev taug kev mus rau saum npoo.
Lwm cov ntses tsis tshua txaus ntshai rau sturgeon, nws yog qhov teeb meem ntawm lawv qhov uas tuaj yeem ua rau lawv lub neej: sturgeons tsis tuaj yeem ua luam dej rov qab. Qhov no yog vim li cas xov algae, bass nrog cov ces kaum, cov hauv paus hniav, thiab pob zeb loj yog qhov teeb meem tiag tiag rau cov ntses no. Feem ntau lawv tsis tuaj yeem tawg tawm ntawm cov "qhov kawg tuag" thiab ua rau tuag taus vim tias dej tsis txaus los ntawm lawv cov gills.
Muaj nyob ib ncig ntawm 30 hom sturgeon thoob ntiaj teb uas txawv tsis tsuas yog hauv lawv cov tsos, tab sis kuj nyob rau hauv lawv lub cev loj: Cov tsiaj loj tshaj plaws, piv txwv li, tuaj yeem loj hlob mus txog 5 m ntev thiab hnyav ib tuj. Ib qho kev xav tsis zoo ntawm no yog tias txhua hom tuaj yeem khaws cia rau hauv lub pas dej vim tias lawv qhov loj me haum rau qhov loj ntawm lub pas dej. Xws li ib tug loj heev sturgeon yuav tsis txwv nws txoj kev loj hlob mus rau 70 cm vim hais tias lub pas dej tsis loj txaus.
Lub sturgeon uas tsim nyog rau koj tus kheej lub pas dej yog feem ntau yuav yog sterlet tiag tiag, uas yog qhov siab tshaj plaws ntawm 100cm ntev. Nws tuaj yeem nyob txog 20 xyoo, yog cov ntses dej ntshiab huv, thiab pom muaj nyob hauv cov dej ntws thiab cov pas dej uas muaj dej ntws siab. Nws muaj qhov sib luag, ntev, me ntsis nkhaus snout thiab nws sab sauv yog tsaus xim av mus rau grey, lub underside reddish-dawb mus rau yellowish nyob rau hauv cov xim. Cov pob txha daim hlau ntawm nws nraub qaum yog qias neeg dawb.
Ib lub pas dej rau tus tiag Sterlet
Raws li twb tau hais lawm, sterlet yog qhov tsawg tshaj plaws ntawm tsev neeg sturgeon thiab yog li ntawd, tsim nyog rau khaws cov pas dej. Txawm li cas los xij, koj yuav tsum nco ntsoov tias khaws cia hauv lub pas dej tsis tau mus rau qhov chaw nyob. Koj yeej tsis muaj peev xwm tsim tau ib tus dej li tiag tiag. Yog tias koj tau txiav txim siab los tsim lub pas dej sturgeon zoo tshaj plaws, qhov tseem ceeb tshaj plaws yog kom muaj chaw ua luam dej txaus txaus. Koj yuav tsum zam cov nroj tsuag dej thiab pob zeb loj hauv qab (vim qhov teeb meem rov qab los) thiab lub pas dej yuav tsum muaj ib puag ncig lossis oval. Hauv cov pas dej zoo li no, sturgeons tuaj yeem txav lawv txoj hauv kev tsis muaj kev cuam tshuam los ntawm kev cuam tshuam. Lwm qhov tseem ceeb tshaj plaws yog cov phab ntsa hauv pas dej sloping. Ntawm no lawv ua luam dej diagonally raws phab ntsa thiab yog li mus txog saum npoo dej.
Lub tshuab lim muaj zog kuj tseem ceeb heev, vim tias sturgeons tsuas yog xis nyob hauv cov dej ntshiab, oxygen-nplua nuj; kev xyiv fab ntawm kev ua luam dej tuaj yeem txhawb nqa nrog lub twj tso kua mis ntws. Feem ntau, lub pas dej yuav tsum yog tsawg kawg yog 1.5 m tob, tab sis tob dua yog ib txwm zoo dua: tsawg kawg 20,000 litres dej yuav tsum muaj cov pa oxygen. Yog hais tias tus sturgeon txaus siab thiab xis nyob hauv nws qhov chaw, nws tuaj yeem ua tau zoo.
Pub Sturgeon
Lwm qhov tseem ceeb ntawm no yog pub mis, vim tias sturgeon muaj qee qhov tshwj xeeb nyob ntawd. Feem ntau, sturgeons noj cov kab larvae, worms, thiab molluscs, uas lawv cheb rau hauv lawv lub qhov ncauj nrog lawv cov barbels. Yog li ntawd lawv tsuas muaj peev xwm noj tau hauv av. Lawv tsis tuaj yeem ua dab tsi nrog cov khoom noj ntab.
Vim lawv qhov loj me, cov zaub mov uas ib txwm nyob hauv lub pas dej tsis txaus; Pub tshwj xeeb yuav tsum tau pub. Qhov tshwj xeeb ntawm no yog tias nws nkag mus rau hauv qab sai sai thiab tsis pub tshaj cov ntsiab lus carbohydrate ntawm 14%. Cov protein thiab rog cov ntsiab lus yog siab heev. Kev pub mis yuav tsum muaj nyob rau yav tsaus ntuj, vim cov sturgeons nquag nquag ntawm no. Cov tub ntxhais hluas cov tsiaj txhu xav tau noj ntau zaus hauv ib hnub.
Koj kuj yuav tsum xyuas kom meej tias cov zaub mov tsis nyob hauv dej ntev tshaj li ib teev, txwv tsis pub nws yuav tsis quav ntsej kiag li. Yog li ntawd, ib qho chaw pub noj uas tswj tau yuav tsum tau siv, qhov chaw pub zaub mov tsis tawg mus deb dhau thiab yog li "tsis pom zoo": Nws ua haujlwm zoo tshaj plaws hauv thaj chaw tiaj tus. Cov lus qhia rau kev pub mis yog tias nyob ib ncig ntawm 1% ntawm lub cev hnyav yuav tsum tau pub rau ib hnub.
Ib rooj plaub tshwj xeeb tshwm sim thaum sturgeons txuam nrog Koi. Cov ntses no paub tias yog omnivores thiab yog tias koj tsis ceev faj, yuav tsis muaj zaub mov rau cov neeg pluag sturgeon nyob hauv qab. Qhov no kuj tsis zoo rau cov koi vim tias cov zaub mov muaj roj ntau ua rau lawv nyob ntev. Koj yuav tau nyiaj ntau dhau. Txawm hais tias koj yuav tsum noj hmo ntuj lossis (uas yog siv los ntawm ntau tus tswv lub pas dej) koj pub cov khoom noj nrog kev pab los ntawm cov yeeb nkab ncaj qha mus rau hauv lub pas dej, qhov twg cov sturgeons tuaj yeem noj tam sim ntawd.
Kaw Lus
Thaum kawg, koj yuav tsum txiav txim siab rau koj tus kheej seb txoj haujlwm twg koj xav ua rau qhov teeb meem sturgeon. Txawm li cas los xij, yog tias koj txiav txim siab rau cov ntses zoo li no, koj kuj yuav tsum tsim lub pas dej tsim nyog kom lub sturgeon tuaj yeem xis nyob. Thiab qhov ntawd suav nrog tag nrho qhov chaw, qhov chaw, qhov chaw!