The manatee is a water mammal that belongs to the sirenidae order, in which there only two genera, Dugong and Trichechus, the tom kawg yog manatees. Cov tsiaj no yog tus cwj pwm los ntawm kev thaj yeeb nyab xeeb thiab muaj ntau yam peculiarities uas tsis muaj ntau nyob rau hauv marine fauna.
Ntawm qhov tod tes, qhov no sirenid tau ntsib cov teebmeem tshwm sim los ntawm tib neeg kev ua, uas, tsis muaj qhov tsis ntseeg, tau cuam tshuam rau lawv cov pejxeem. Txaus siab txuas ntxiv nyeem cov kab lus no hauv peb lub xaib thiab yog li kawm tag nrho yam ntxwv ntawm manatee, hom uas muaj nyob, lawv qhov chaw nyob yog dab tsi, pub noj thiab yug me nyuam.
Txoj kev ntawm cov manatee
Cia peb saib hauv qab no yog dab tsi yog yam uas ua rau manatee:
- Lawv yog tsiaj txhu, ntsuas nruab nrab ntawm 3 thiab 4 meters thiab hnyav ntawm 500 mus rau 1000 kg .
- Lawv lub cev zoo li tuab torpedo.
- Lub taub hau me nyob rau lub cev, zoo li lub qhov muag.
- Lawv muaj snout uas lub qhov ntswg nyob thiab, hauv qab, lub qhov ncauj. Saib los ntawm pem hauv ntej nws muaj ib tug flattened duab. Nws kuj muaj qhov loj, tuab tuab los yog whiskers.
- Lawv muaj ob forelimbs, uas yog flattened, paddle-puab fins. Tsis tas li ntawd, nws muaj qhov loj, flattened caudal fin.
- Ntawm tis tis sab hauv vestigial ntsia hlau pom.
- daim tawv nqaij yog txog 5 cm tuab, finely wrinkled thiab grey-xim av xim. Txawm li cas los xij, feem ntau pom lawv nrog qee cov xim ntsuab uas yog vim muaj cov algae ntawm lawv lub cev.
- Lawv muaj txwv vision, tab sis ib tug zoo-tsim auditory system. Whiskers xav tias muaj txiaj ntsig zoo rau kev txais cov ntaub ntawv los ntawm lawv ib puag ncig.
Type of manatees
Raws li peb tau hais lawm, lawv yog cov tsiaj txhu uas muaj nyob rau hauv genus Trichechus, uas peb hom ntawm manatees raug lees paub, uas yog:
- Caribbean manatee (Trichechus manatus), ntawm ob hom subspecies tau txheeb xyuas: Florida manatee (Trichechus manatus latirostris) thiab manatee West Indian (Trichechus manatus manatus). Florida manatee yog manatee loj tshaj plaws ntawm tag nrho cov, txawm tias West Indian manatee kuj loj dua lwm hom.
- Amazon or Amazon Manatee (Trichechus inunguis). Nws yog qhov tsawg tshaj plaws thiab thinnest ntawm txhua hom manatees.
- African manatee (Trichechus senegalensis). Lub cev nws zoo ib yam li Caribbean manatee, txawm hais tias nws muaj qee qhov sib txawv ntawm nws lub taub hau, xws li lub qhov muag pom ntau dua thiab qis qis qis.
Manatees nyob qhov twg?
Cov manatee qhov chaw nyob tsuas yog dej xwb thiab lawv tuaj yeem pom hauv dej tshiab thiab ntsev. Nyob ntawm hom tsiaj, cov tsiaj no tau muab faib rau ntau thaj chaw. Yog li, Caribbean manatee muaj nws qhov kev faib tawm raws ntug dej hiav txwv Atlantic, los ntawm North America hauv cheeb tsam Virginia, nrog rau muaj qhov tseem ceeb nyob rau tag nrho cov ntug dej hiav txwv ntawm Caribbean Hiav Txwv, mus rau Brazil.
Raws li subspecies, Florida manatee raug txwv rau thaj tsam no hauv Tebchaws Meskas. Txawm li cas los xij, nyob rau lub caij ntuj no tsis yog lub caij ntuj no, nws tuaj yeem mus rau cov xeev nyob sib ze, txij li qhov kub ntawm cov dej tso cai rau nws. Rau nws feem, Antillean manatee raug faib los ntawm Bahamas mus rau ntug dej hiav txwv ntawm Brazil, thiab tseem muaj nyob rau hauv Gulf of Mexico thiab Caribbean Hiav Txwv.
Raws li Amazonian manatee, nws nyob rau hauv Amazon phiab, yog li nws muaj kev faib nyob ze rau sab qaum teb ntawm South America, nyob rau hauv lub fluvial system ntawm Colombia, Ecuador, Peru thiab Brazil. Thaum kawg, African manatee tam sim no nyob rau ntawm ntug dej hiav txwv ntawm Africa uas mus los ntawm Senegal mus rau thaj tsam ntawm Angola. Nws yog faib, ntxiv rau cov ntug dej hiav txwv, los ntawm estuaries thiab dej ntws nyob ib sab mus rau nws.
Nyob rau hauv qhov kev nkag siab no, manatees, muaj nyob rau hauv hiav txwv thiab nyob rau hauv cov dej ntws, kuj nyob rau hauv lub estuaries, mangroves, kwj dej, kwj dej thiab zoo sib xws lub cev ntawm cov dej nrog txawv salinity. Txawm li cas los xij, qhov chaw nyob ntawm manatee,
Dab tsi yog manatee noj?
Kev noj zaub mov ntawm manatee varies raws li homYog li, Caribbean thiab Amazonian manatees muaj kev noj zaub mov tshwj xeeb, thaum Neeg Asmeskas manatee, txawm hais tias nws tsuas yog noj zaub, kuj suav nrog cov ntses me thiab molluscs hauv nws cov khoom noj. Tias yog vim li cas nws yog omnivorous.
Manatees pub rau ntau yam dej nroj tsuag thiab algae. Kom tau zaub mov lawv siv lawv daim di ncauj. Nrog lawv lawv tuav cov nplooj los yog algae, raws li rooj plaub. Cov tsiaj no siv sij hawm noj ntau heev, yog qhov tsim nyog los tswj lawv lub cev loj.
How do manatees reproduce?
Txawm hais tias lawv feem ntau tuaj yeem yug me nyuam thaum ntxov, qhov kev loj hlob tiag tiag yog mus txog tom qab 7 xyoo ntawm cov poj niam thiab 9 tus txiv neej. Manatee reproduction tshwm sim txhua lub sij hawm ntawm lub xyoo, txawm hais tias nyob rau hauv African hom calving peaks nyob rau hauv lig caij nplooj ntoos hlav los yog lub caij ntuj sov.
NOJ QAB HAUS NYOB RAU HAUV THAUM TSHAV KUB NIAM TUAG LAWV NEEJ THIAB MUAJ IB TUG NEEG UA NTEJ copulate nrog nws. Kev yug me nyuam thiab kev xeeb tub txoj kev vam meej yog nyob ntawm qhov tseeb loj hlob ntawm tus poj niam.
Lub caij gestation kav txog ib xyoos thiab, feem ntau, ib tug calf yug, uas, txawm nws yuav ua luam dej, Nws nyob ntawm. ntawm kev saib xyuas ntawm nws niam, uas yog lub luag haujlwm rau nws. Cov poj niam tsim kev sib raug zoo txog li ob xyoos nrog lawv cov tub ntxhais hluas. Kev kwv yees qhia tias poj niam muaj me nyuam txhua 2-5 xyoos.
Manatee Conservation Status
Tag nrho peb hom manatee raug suav hais tias yog qhov yooj yim los ntawm International Union for Conservation of Nature. Yog vim li cas rau qhov ntsuas no suav nrog:
- Nkauj tawm tshiab 2019-2019 Nkauj tawm tshiab 2019-2019
- Indirect catches thaum ntes tau hauv nets lossis nuv ntses.
- Tshuaj nrog lub nkoj.
- Txoj kev sib cais ntawm pab pawg los ntawm kev tsim cov dams lossis kev hloov cov dej ntws.
- Cov kev hloov tseem ceeb hauv lawv qhov chaw nyob. Ntau thaj chaw ntawm mangroves, estuaries, dej ntws thiab cov dej zoo sib xws uas cov neeg nyob hauv tau raug cuam tshuam los ntawm tib neeg kev ua, uas, tsis muaj qhov tsis ntseeg, yuav ua rau muaj kev puas tsuaj rau cov tsiaj nyob hauv ntau qhov ecosystems uas tau hais tseg.
Yog koj xav paub ntau ntxiv, tsis txhob hnov qab peb tsab xov xwm Puas yog manatee nyob rau hauv kev phom sij ntawm kev ploj tuag?
