Blue Crab vs Red Crab
Crabs ua qhov tseem ceeb hauv ntau txoj hauv kev, tab sis lawv qhov tseem ceeb tau paub dav tias yog zaub mov qab rau tib neeg, tab sis lub luag haujlwm ntawm ecological uas lawv ua si kuj tseem ceeb rau qhov xwm txheej. Cov kab sib txawv yog qhov tseem ceeb sib txawv, qhov twg xiav thiab liab crabs tsis yog qhov txawv ntawm txoj cai ntawd. Cov roob ris xiav thiab cov roob ris liab muaj ntau qhov sib txawv ntawm lub cev, tus cwj pwm coj tus cwj pwm, ecology, zaub mov muaj txiaj ntsig rau tib neeg, thiab ob peb lwm yam.
Blue Crab
Blue crab yog lub npe hu ua Callinectes sapidus, tseem lub npe Chesapeake blue crab, Atlantic blue crab kuj tau siv. Raws li ib qho ntawm nws cov npe hais qhia, xiav crabs yog ib txwm pom nyob rau hauv Dej Hiav Txwv Atlantic, tab sis tshwj xeeb tshaj yog nyob ib puag ncig sab hnub poob ntawm ntug dej hiav txwv Atlantic. Cov crabs no muaj cov xim zoo nkauj xiav appendages nrog ib tug blackish xiav carapace. Lub carapace ntsuas txog 230 millimeters, thiab nws dais plaub cov hniav pem hauv ntej, uas yog ib qho kev qhia tshwj xeeb los ntawm lwm yam kab ntsig hauv hiav txwv Atlantic. Lawv qhia meej meej txog kev sib deev dimorphism, uas ua rau pom tseeb tshaj plaws hauv cov duab ntawm lawv lub plab, qhov twg nws yog rhiab thiab ntev ntawm cov txiv neej thaum poj niam muaj lub plab sib npaug thiab dome-zoo li lub plab.
Blue crabs yog nrov ua zaub mov rau tib neeg, tshwj xeeb tshaj yog nyob ib ncig ntawm Chesapeake lub nroog nyob rau sab hnub tuaj ntug dej hiav txwv ntawm Virginia, Tebchaws Meskas thiab hauv Gulf of Mexico. Blue crabs yog omnivorous; Lawv ntxuav lub hiav txwv los ntawm kev noj cov tsiaj uas lwj, tab sis lawv nyiam noj shelled bivalves thiab ntses me me yuav tsum tau sau tseg. Nws yog qhov txaus nyiam kom paub tias ib tus poj niam xiav roob ris tuaj yeem tsim cov qe loj xws li ntau dua 8, 000, 000 hauv ib lub neej.
Red Crab
Liab crab yog lub npe hu ua Christmas Island liab roob ris, thiab nws lub npe scientific yog Gecarcoidea natalis. Liab roob ris tsuas yog pom nyob rau hauv Christmas Island thiab Cocos Island ntawm Indian Dej hiav txwv. Lawv muaj ci liab appendages nrog tsaus liab carapace uas ntsuas txog 11 cm. Lub carapace yog puag ncig zoo li tsis muaj serrated margins los yog frontal hniav. Lawv ci liab appendages yog loj rau me me carapace, tab sis cov claws yog me me. Txiv neej liab crabs feem ntau loj dua cov poj niam, tab sis poj niam lub plab yog dav dua li cov txiv neej. Txawm li cas los xij, qhov sib txawv ntawm tus txiv neej thiab poj niam lub plab yog siv tau rau cov neeg laus (ntau tshaj peb xyoos) liab crabs.
Liab crabs nyob hauv burrows, kom ntseeg tau tias lub hnub yuav tsis qhuav lawv tawm. Lawv ua pa los ntawm gills thiab pub feem ntau ntawm cov nroj tsuag xws li nplooj thiab paj. Txawm li cas los xij, liab crabs qee zaus noj rau qee yam tsiaj txhu, thiab. Liab crabs tau raug soj ntsuam rau lawv tus cwj pwm cannibalistic. Ib qho kev coj cwj pwm zoo ntawm cov crabs liab yog kev tsiv teb tsaws txhua xyoo rau hauv hiav txwv rau kev yug me nyuam. Ntau lab tus crabs migrate raws hiav txwv pem teb thiab nteg lawv qe. Raws li kev kwv yees qhov ntau thiab tsawg ntawm cov pej xeem, yuav tsum muaj txog 43.7 lab tus kab liab liab, uas yog tom qab cov pej xeem loj zuj zus vim muaj kab ntsaum kab mob, cov ntsaum daj daj, tua yuav luag ib feem peb ntawm cov roob ris liab.
Dab tsi yog qhov txawv ntawm Blue Crab thiab Red Crab?
• Raws li lawv lub npe piav qhia, xiav roob ris thiab liab roob ris txawv xim.
• Liab roob ris yog ib txwm nyob rau ntawm Dej Hiav Txwv Atlantic thaum xiav roob ris yog nyob rau ntawm Cocos Island thiab Christmas Island nyob rau hauv Dej Hiav Txwv Indian.
• khab xiav loj dua roob ris liab.
• Blue crab muaj serrated carapace, whereas liab crab muaj ib puag ncig zoo li carapace.
• Appendages loj dua piv rau lub cev hauv roob ris liab, qhov xiav roob ris muaj ob txhais ceg me dua piv rau lub cev.
• Blue crab yog nrov li nqaij nruab deg tab sis tsis yog liab crab.
• Blue crab yog ib qho omnivore, whereas liab crab yog feem ntau yog herbivore tab sis qee zaus noj tsiaj.
