Crayfish mus los ntawm ntau lub npe. Koj tseem yuav hnov lawv hu ua crawdads, crawfish, lossis yabbies. Txawm tias lawv cov moniker, lawv muaj cov khoom noj tshwj xeeb, txawm nyob hauv lawv qhov chaw nyob lossis hauv lub tank. Cov yav dhau los sib txawv dav thiab cuam tshuam rau yam muaj.
Crayfish yog ib feem ntawm phylum Arthropoda, uas muaj xws li ib tug loj array ntawm invertebrate hom, zoo li kab. Lub subphylum uas crayfish yog Crustacean. Cov pab pawg ntawd muaj ntau hom tsiaj, xws li cw thiab lobsters.
Ntau tshaj 640 hom crayfish muaj nyob thoob ntiaj teb. Lawv muaj ob lub superfamilies: Astacoidea ntawm Northern Hemisphere thiab Parastacoidea ntawm Southern Hemisphere.
Tus Astacoidea superfamily suav nrog:
- Astacidae tsev neeg
- Cambaridae family
- Cambaroididae tsev neeg
Txhua tsev neeg nyob ib cheeb tsam ntawm lub ntiaj teb. Lawv yog, raws li:
- Western North America thiab Europe
- Canada, North America, thiab Central America
- Eastern Asia
Parastacoidea muaj ib tsev neeg, Parastacidae, uas muaj ntau tshaj 170 hom nyob rau hauv New Zealand, Australia, South America, thiab lwm lub teb chaws nyob rau hauv South Ocean.
Crayfish thoob ntiaj teb
Lub Cambaridae yog qhov loj tshaj plaws ntawm peb tsev neeg, muaj ntau dua 330 ntawm cov neeg sawv cev uas tseem tshuav lossis nyob. Astacidae muaj 13 hom, thaum Cambaroididae tsuas muaj rau. Cov lej no qhia tias peb yuav pom qhov sib txawv loj tshaj plaws hauv kev noj haus nrog tsev neeg Cambaridae. Yog tias koj xav txog nws qhov ntau, hom ntawm pab pawg no muaj ntau yam ecosystems thiab chaw nyob. Qhov ntawd taw qhia rau kev noj zaub mov txawv.
Kev Noj Qab Haus Huv Crayfish
Crayfish yog omnivores, uas txhais tau tias lawv yuav noj cov nroj tsuag thiab nqaij. Lub sijhawm kawg no suav nrog ntau qhov chaw muaj protein ntau, suav nrog kab, dej crustaceans, qwj, thiab txawm worms. Qhov no yog lub luag haujlwm ntawm qhov chaw no crustaceans nyob. Cov tsiaj no yog cov ravenous eaters mus txog qhov uas lawv tuaj yeem ua kev puas tsuaj invasive hom.
Crayfish tsis yog cov neeg noj khoom noj los ntawm ib qho twg. Lub tswv yim dav dav no muab cov tsiaj no ua kom zoo dua qub uas pab lawv muaj sia nyob hauv lub ntiaj teb dev noj-dog. Crayfish tuaj yeem dov nrog cov punches thiab tseem ua tau raws li lawv cov kev xav tau kev noj haus. Ib hom uas tshwj xeeb hauv ib qho khoom noj yog qhov yooj yim yam tsis muaj kev npaj thaub qab.
Astacidae
Cov tsev neeg Astacidae nyob hauv ntau qhov chaw nyob thoob plaws hauv Tebchaws Europe, thaj chaw ntawm Canada, thiab Pacific ntug dej hiav txwv. Cov tsiaj feem ntau yog cov dej tsis qab, tab sis qee tus kuj nyob hauv dej brackish. Cov cheeb tsam no cuam tshuam rau lawv cov khoom noj thiab cov tsiaj txhu. Qee hom muaj kev noj zaub mov txawv raws li lawv lub hnub nyoog. Piv txwv li, cov tub ntxhais hluas Austropotamobius torrentium noj tsiaj proteins, thaum cov laus nyiam cov nroj tsuag.
Cambaridae
Cambaridae tsev neeg yog qhov loj tshaj ntawm peb pawg crayfish los txog rau tam sim no, nrog ntau tshaj 400 hom. North America yog lub tsev rau ntau dua 330 ib leeg. Nrog ntau tus tswv cuab, kev noj haus ntawm cov crustaceans npog ntau yam khoom noj. Lawv yuav noj kab, ntses me me, thiab mollusks, xws li qwj thiab clams. Txij li thaum lawv yog omnivores, crayfish tseem yuav noj cov zaub thiab lwj cov organic teeb meem.
Cambaroididae
Cambaroididae tsev neeg yog pab pawg tsawg tshaj plaws, tsuas muaj rau hom nyob. Lawv feem ntau nyob hauv qhov nqaim thiab nthuav dav hauv ob peb lub tebchaws xwb. Yog li ntawd, lawv cov kev noj haus qhia tau hais tias tib yam tshwj xeeb, nrog rau kev sib txawv ntawm cov khoom noj. Nws tsim nyog hais tias pawg no muaj tib hom tsiaj nyob hauv Asia.
Parastacidae
Parastacidae tsev neeg nyob hauv ntau qhov chaw nyob, nrog qee hom txawm pom hauv Antarctica. Interestingly, tsis muaj ib tug nyob rau hauv lub teb chaws African thiab tsis muaj ib tug neeg sawv cev nyob rau hauv lub Northern Hemisphere. Kev sib txawv ntawm lawv qhov chaw nyob txhais tau hais tias cov zaub mov ntawm cov crustaceans yuav muaj kev cuam tshuam cov khoom noj sib npaug.
Kev Noj Qab Haus Huv Crayfish
Cov crustaceans no yog cov pub zaub mov uas yuav noj txhua yam uas lawv nrhiav tau, suav nrog ntses. Qhov tseeb ntawd yuav ua lub luag haujlwm hauv dab tsi tank mates ntxiv rau koj crayfish lub thoob dej yug ntses.
Tau crayfish noj yam koj muab rau lawv nyob ntawm lawv ib puag ncig. Zoo li lawv cov tsiaj qus, lawv yog cov tsiaj nocturnal. Koj yuav tsum muab npog rau lawv kom nkaum thaum nruab hnub. Kev tshawb fawb tau pom tias kev ntxhov siab tuaj yeem cuam tshuam rau cov crustaceans ib yam nkaus, uas tuaj yeem ua rau, cuam tshuam rau lawv txoj kev qab los.
Cov khoom noj tsim nyog uas koj tuaj yeem muab koj cov crayfish suav nrog cov khoom uas koj yuav muab rau lwm cov khoom noj hauv qab, xws li pleco wafers, sinking pellets, thiab zaub ntsuab. Lawv yuav yooj yim noj zaub, xws li peas thiab spinach. Lawv kuj yuav noj cov nroj tsuag hauv thoob dej yug ntses. Txawm li cas los xij, crayfish tuaj yeem rhuav tshem txhua yam nroj tsuag uas koj tso rau hauv koj lub tank.
Crayfish molt thiab los lawv cov tawv nqaij thaum lub caij ntuj sov. Tab sis tsis txhob raug ntxias kom tshem nws. Cov crustaceans yuav ua haujlwm luv luv ntawm nws kom tau txais cov calcium uas nws muaj.
Txoj Kev Xav
Crayfish yog cov tsiaj ntxim nyiam ntawm ntau qhov qhab nia. Lawv keeb kwm rov qab mus txog 265 lab xyoo dhau los mus rau lub sijhawm Triassic thaum ntxov. Lawv tau yoog mus rau ntau qhov chaw nyob thiab tseem coj cov tsiaj qus mus rau thoob dej yug ntses. Yog tias ib qho tseeb, koj yuav tsis muaj teeb meem pub koj cov crayfish.
