Qauv Crayfish: sab nraud thiab sab hauv

Tus qauv ntawm lub Crayfish, uas yog tus neeg sawv cev ntawm lub hom arthropods txuam nrog nws ib puag ncig. Qhov no yog ib tug raug cov neeg ntawm dej tsis qab ntsev uas nqus pa siv gills. Nyob rau hauv daim ntawv no, lub Crayfish yuav muab suav hais tias. Tus qauv, cov duab, vaj tse thiab cov yam ntxwv ntawm lub neej uas hais rau koj hauv qab no.

Cov yam ntxwv nta ntawm crustaceans

Zoo li tag nrho cov arthropods, cov qauv ntawm cov Crayfish (daim duab hauv qab no qhia tau hais tias nws) yog sawv cev los ntawm ib tug segmented lub cev thiab nqua. Ib qho taub hau, qab plab thiab lub plab mog. lub cev feem yog paired nqua, muaj raws ntawm ib tug neeg feem. Lawv yog cov tau ua heev taw. Jointed nqua feem ntau yog txuas mus rau lub mis ntawm lub cev feem. Crayfish lwm qauv sau raws nkaus Ii kiag li yam ntxwv nta arthropods.

vaj tse

Crayfish muaj nyob rau hauv cov dej tshiab. Ntxiv mus, lawv muaj peev xwm yuav tau ua ib qho taw qhia ntawm nws cov ib puag ncig muaj kev ruaj ntseg. Tom qab tag nrho, cov tsiaj xav pas dej nrog dej huv thiab siab oxygen cov ntsiab lus. Tus qauv ntawm lub Crayfish yog lub luag hauj lwm rau lawv muaj peev xwm nkag nrog kev pab los ntawm taug kev ob txhais ceg, los yog ua luam dej. Thaum lub sij hawm hnub lawv muaj nyob rau hauv tej yam ntuj tso Cross. Hmo ntuj nkag tawm ntawm lawv qhov ntawm nyob rau hauv cov pob zeb thiab cav. Thaum lub sij hawm no lawv tab tom nrhiav rau cov khoom noj. Nyob rau hauv no hais txog, Crayfish yog tsis choosy. Lawv feem ntau yog omnivores. Cua nab, ntses kib, tadpoles, mollusks, algae - lawv yuav tau saj cov dej Crayfish. Lawv tsis disdain thiab tuag organic teeb meem. Yog hais tias koj txiav txim siab kom muaj ib tug tsiaj nyob rau hauv koj lub tsev thoob dej yug ntses, haum rau zaub mov tsis yog tshwj xeeb pub, tab sis kuj cov nqaij, zaub thiab qhob cij. Txawm li cas los, nyob rau tib lub sij hawm muaj lub purity ntawm cov dej yuav ua tau heev yooj yim.

Cov sab nraud qauv ntawm cov Crayfish

qog nqaij hlav lub cev muaj ob qhov chaw. Nws cephalothorax thiab lub plab mog. Lub pem hauv ntej ib feem yog them nrog ib tug thiaj li hu ua lub plhaub lawm. Ib tug plab mog muaj ib tug neeg feem uas yog cov txheej txheem ntawm nyob rau hauv sab saum toj me me daim hlau. Nyob rau cephalothorax kuj ob khub ntawm antennae, ncauj thiab tsib officers ntawm taug kev ob txhais ceg. Txhua yam ntawm lawv ua tej yam zog. Piv txwv li, tus thawj khub ntawm xaus nrog haib claws uas yuav pab tau rau txais khoom noj khoom haus, tearing nws mus rau daim, thiab kev tiv thaiv los ntawm cov yeeb ncuab.

rau officers ntawm nqua uas txuas mus rau lub plab mog. Qhov kawg khub ntawm ob txhais ceg ncua thiab ua ke nrog rau cov quav phaj ntaub ntawv tus Tsov tus tw tis ntses. Nyob rau hauv tsos nws tsa ib tug kiv cua. Nrog qhov quav Crayfish sai sai ua luam dej rov qab kawg ua ntej. Collectively lawv tseem yog 19 nqua.

lub cev ntaub thaiv

Nta Crayfish qauv muaj feem txiav txim los ntawm nws npog. Zoo li tag nrho cov arthropods, nws yog sawv cev los ntawm lub cuticle, uas tas ib tug haib exoskeleton. Nws muab ntxiv hardness calcium carbonate, uas yog impregnated.

Txij li thaum lub cuticle yog tsis muaj peev xwm ncav, Crayfish txoj kev loj hlob nrog periodic molts. Qhov no yog ib qho tseem ceeb lub sij hawm nyob rau hauv lub neej ntawm cov dej dwellers. Ob peb hnub ua ntej no thaj neeb ua nyob tsis tswm, tsis txhob noj, thiab tag nrho cov sij hawm siv nyob rau hauv kev tshawb fawb ntawm qhov chaw nkaum. Nrog khaus taw thiab lub cev nqua lawv tau tshem ntawm cov laus daim ntawv los ntawm uas mam li los ntawm ib tug txoj kab txiav ntawm tus ciam cephalothorax thiab lub plab mog. Nyob rau hauv ib tug muaj kev ruaj ntseg chaw nyob qog nqaij hlav tuaj mus rau kaum hnub, kom txog thaum lub tshiab cuticle tau hardened.

Lub sab hauv qauv ntawm cov Crayfish

Thaum lub sij hawm embryonic txoj kev loj hlob ntawm tag nrho cov arthropods pw ib theem nrab lub cev muaj kab noj hniav. Tab sis nws yuav tsis rau tag nrho lub neej ntawm cov tsiaj. Nyob rau hauv tus txheej txheem ntawm ib tug neeg txoj kev loj hlob ntawm cov qauv no yog kev puas tsuaj, phiajcim nrog lub remnants ntawm cov thawj thiab tov tsim tau ib cov kab noj hniav. Qhov khoob ntawm lub cev uas tau sau nrog roj cev nyob rau hauv crustaceans. Nws yog ib hom ntawm xoob connective ntaub so ntswg, uas ua ib qho tseem ceeb functions: cia cov as-ham, tus tsim ntawm cov ntshav hlwb, kev tiv thaiv tiv thaiv txhua yam kev puas tsuaj.

licas

Tus qauv ntawm lub Crayfish yog ho sib txawv los ntawm cov qauv ntawm cov mollusks thiab coelenterates. Nyob rau hauv kev, lawv tsis muaj daim tawv nqaij-npag sac. Nyob rau hauv muaj zog exoskeleton yog bundles ntawm striated nqaij uas yuav ntsws sai heev.

Major hloov khoom nruab nrog nruab

Lub sab hauv qauv ntawm cov Crayfish hais haum complex hloov khoom nruab nrog nruab. Digestive - lub los ntawm hom, nrog lub xub ntiag ntawm daim siab thiab muaj qaub ncaug uas paim enzymes uas zom cov as-ham. Qhov kawg metabolic khoom raug muab tshem tawm los ntawm lub cev los ntawm txoj kev lub excretory system, muab Malpighian tubules.

Ua pa Crayfish vim dej nws ib puag ncig, yog lub gills. Lawv zoo txuas rau lub circulatory system. Nws yog tsis tau kaw. Cov hlab ntsha qhib rau hauv lub cev muaj kab noj hniav, tov nrog nws kua daim ntawv hemolymph. Nws muab thauj ntawm oxygen, carbon dioxide, as-ham, metabolic khoom.

Qhov tseem ceeb tshaj ua yog lub hemolymph thiab kev tiv thaiv. Nws muaj tshwj xeeb hlwb uas ua amoeboid tsab ntawv tsa suab capture pseudopodia pathogens thiab zom lawv. Tsiv lub hemolymph ntawm lub cev muaj ib tug pulsating nyeem tas txog ntsha - plawv. Raws li cov ntshav yog tov nrog coelomic kua thiab yog tsis muab faib mus rau hauv lub arterial thiab venous, Crayfish yog txias-blooded tsiaj. Qhov no txhais tau tias nws lub cev kub dauv mus rau lub cua txias nyob rau hauv lub cheeb tsam.

Nyob rau hauv lig lub caij nplooj zeeg Crayfish pib muab. Nws yog dioecious tsiaj nrog lawv txoj kev loj hlob thiab sab nraud fertilization. Tus txiv neej muaj ob tug noob qes thiab vas deferens, tus poj niam - zes qe menyuam thiab paired oviducts. Tom qab fertilization, lub qe yog nyob rau hauv lub plab ob txhais ceg poj niam. Yog li ntawd nws qhia tau hais tias ib tug niam xav, txhawj txog lub neej yav tom ntej offspring. Nyob rau hauv lig caij nplooj ntoos hlav los yog thaum ntxov lub caij ntuj sov ntawm lawv tso cov tub ntxhais crabs uas yog ib tug tib yam ntawm cov neeg laus.

Suffice nws tsis yooj yim mus nrhiav tau thiab cov paj hlwb. Nws muaj differentiated seem: pem hauv ntej, nruab nrab thiab nram qab lub. Thawj kho lub qhov muag ua hauj lwm, muab sophisticated tus cwj pwm cov lus teb ntawm cov tsiaj, thiab tus so innervate mustache. Lub hlwb anatomically kev cob cog rua nrog lub ventral paj qaum, los ntawm uas lub cev ntawm tus neeg paj fibers cuag.

Tus nqi ntawm qhov thiab tib neeg lub neej

Juveniles Crayfish daim ntawv plankton dej tsis qab ntsev - ib tug tseem ceeb link nyob rau hauv lub mov saw. Siv cov zaub mov ntawm cov tsiaj, lawv huv. Tsis ntev los no, vim tus tsis zoo feem ntawm tus xov tooj ntawm tib neeg Crayfish pejxeem tau poob dramatically. Cov qias neeg dej Crayfish zag inevitably tos tuag. Qhov no tshwm sim kuj vim hais tias ntawm qhov tseem ceeb coj mus muag nqi ntawm cov neeg sawv cev ntawm lub arthropods. Tom qab tag nrho, Crayfish nqaij yog ib tug tseem ceeb khoom noj khoom, thiab nyob rau hauv tej cheeb tsam txawm delicacy. Nws yog nplua nuj nyob rau hauv cov nqaijrog, vitamins thiab ib txoj lw ntsiab. Crayfish yog qhov loj tshaj plaws hauv chav kawm ntawv tus neeg sawv cev uas nyob rau hauv cov dej tshiab. Yuav kom txuag hom ntawm qhov, kom txog thaum mid-lub caij ntuj sov lawv Nuv ntses officially txwv.

Tus qauv ntawm tus dej yog lom zem ntau vim cov mob cancer nws ib puag ncig thiab txiav txim nws tseem ceeb nyob rau hauv qhov thiab tib neeg lub neej.