Wadatacce
- menene cetaceans
- Halaye na cetaceans
- inda cetaceans ke rayuwa
- Nau'in cetaceans
- 1. Asiri
- 2. Odontocetes
cetaceans su ne Dabbobin ruwa mafi shahara saboda kasancewar su a cikin tsoffin labarai da almara. Dabbobi ne da a koda yaushe suke tayar da sha'awa mai yawa daga mutane. Waɗannan dabbobin, gabaɗaya, manyan abubuwan da ba a san su ba ne, kaɗan kaɗan, suna ɓacewa ba tare da alama muna yin komai ba.
A cikin wannan labarin ta PeritoAnimal, zamuyi magana game da cetaceans - menene su, halayen su, inda suke zama da sauran abubuwan sha'awa. Shin kuna son ƙarin sani game da waɗannan ƙwaƙƙwaran zurfin teku? Ci gaba da karatu!
menene cetaceans
Umurnin cetaceans ya ƙunshi ƙananan abubuwa biyu, the sihiri, wanda aka ƙera da gemun gemu, da odontocetes, ya ƙunshi cetaceans masu haƙora, kamar su kifin ruwa, dabbar dolphin da orca.
Juyin halittar cetaceans ya haifar da kamanceceniya tsakanin waɗannan rayayyun halittu guda biyu, kasancewar sakamakon haduwar juyin halitta. Siffofin gine -gine da aka saba da su tsakanin ƙungiyoyin biyu, kamar surar jiki, matsayin hancin hanci ko spiracle sama da kai, rashin sautin muryoyi da irin sifar huhu, suna ba da shawarar cewa waɗannan nau'ikan sun samo asali daga kakanni daban -daban zuwa dabbobi. sosai kama da juna ..
Saboda haka, dabbobi masu shayarwa na cetacean dabbobin huhu ne da ke zaune a tekuna da tekuna, kodayake wasu nau'in suna rayuwa a cikin koguna.
Halaye na cetaceans
Cetaceans suna da yanayin jikinsu, ilimin halittar jiki, ilimin halittar jiki da mazaunin su. Babban halayen cetaceans sune:
- Suna nuna a yawan taro na jiki na musamman wanda ke shafar ajiyar oxygen da ƙarfin amfani da su. Wannan yana hana hypoxia ko rashin isashshen oxygen a cikin kyallen takarda.
- A lokacin nutsewa, zuciyarka tana karkatar da jini zuwa kwakwalwarka, huhu da tsokoki don ba da damar iyo da ci gaba da aiki na jiki.
- Trachea ya fi guntu fiye da na dabbobi masu shayarwa na ƙasa kuma baya sadarwa da maƙogwaro. An haɗa shi da spiracle, inda suke sha da fitar da iska.
- da manyan tafki na mai don hana hypothermia lokacin nutsewa zuwa zurfin zurfi.
- tsarin hydrodynamic na jikinka yana ba da izinin saurin ninkaya kuma yana hana lalacewa daga manyan canje -canjen matsin lamba.
- ba ku da sautin murya. Maimakon haka, suna da gabobin da ake kira guna da suke amfani da shi don sadarwa ko farauta. echolocation.
- Shin fata mai kauri sosai wanda saman sa, epidermis, ana ci gaba da sabunta shi da sauri.
- Lokacin haihuwa, kwiyakwiyi suna da fur, amma wannan yana ɓacewa bayan 'yan watanni na rayuwa.
- Yawan fikafikai ya dogara da nau'in, kodayake duk suna da fikafikan pectoral da caudal.
- Wasu nau'in suna da hakora, duk girmansu da siffarsu ɗaya. Wasu kuma suna da gemun da suke amfani da su wajen tace ruwa.
inda cetaceans ke rayuwa
Mazaunin cetaceans shine yanayin ruwa. Ba tare da shi ba, fatarsu za ta bushe kuma za su mutu. Wasu cetaceans suna rayuwa a cikin ruwan dawafi, misali beluga whale (Delphinapterus leucas) ko narwhal whale (Monodon monoceros), don haka ana daidaita su da yanayin zafi. Wasu kuma suna da rabe-raben wurare masu zafi, kamar doguwar matuƙar matukin jirgi (Globicephala melas) da ɗan gajeren matuƙin jirgin ruwa (Globicephala macrorhynchus).
Wasu daga cikin waɗannan dabbobin suna rayuwa cikin ruwa mai daɗi kuma suna fuskantar barazanar nau'in cetacean, musamman saboda gurɓataccen kogi, gina madatsar ruwa da farautar wariya. Jerin cetaceans da ke zaune a cikin koguna shine:
- Dolphin na Bolivia (Inia boliviensis)
- Dabbar dolphinInia araguaiaensis)
- Dolphin ruwan hoda (Ina geoffrensis)
- Labarin batsa (Pontoporia blainvillei)
- Baiji (vexillifer lipos)
- Indo-dabbar ruwa (karamin platanist)
- Dabbar dolphin (gangetic platanist)
Mafi yawan cetaceans yin hijira na shekara -shekara daga wuraren ciyar da su zuwa wuraren kiwo. Wannan shine lokacin da waɗannan dabbobi ba su da kariya.
A cikin hoton za mu iya ganin hoton ruwan hoda:
Nau'in cetaceans
Cetaceans an rarrabasu cikin manyan ƙungiyoyi biyu: ka sihiri da kuma goge baki.
1. Asiri
masu sihiri, wanda ake kira whales, basu da yawa kuma galibi suna halin kasancewa da farantan gemu maimakon hakora. Dabbobi ne masu girman gaske waɗanda galibi suna rayuwa cikin ruwan sanyi. Ba a taɓa ganin wasu nau'ikan sa ba yayin abubuwan gani na cetacean shekaru da yawa. Mafi yawan nau'ikan sufi sune:
- Yankin Whale na Pacific (Eubalaena japonica)
- Greenland Whale (Balaena mysticetus)
- Fin Whale (Balaenoptera physalus)
- Blue Whale (Balaenoptera musculus)
- dabbar whale (Megaptera novaeangliae)
- Grey whale (Eschrichtius robustus)
- Pygmy Dama Whale (Caperea gefe)
A cikin hoton za mu iya ganin Fin Whale:
2. Odontocetes
Odontocetes ne cetaceans tare da hakora na gaske, a cikin babba ko ƙarami. Suna da yawa kuma sun haɗa da nau'ikan iri iri. Duk dabbobi ne masu cin nama. Mafi sanannun nau'in odontocetes sune:
- Longfin Pilot Whale (Globicephala melas)
- Kudancin Dolphin (Lagenorhynchus australis)
- Orca (daorcinus orca)
- Dabbar dolphinstenella coeruleoalba)
- Dabbar dabbar dolphin (Tursiops truncatus)
- Dabbar dolphin mai launin fata ta Atlantika (Lagenorhynchus acutus)
- Dabbar Dolphin (Lagenorhynchus obscurus)
- Porpoise (Phocoena phocoena)
- Vaquita (Phocoena sinus)
- Porpoise-na-tabarau (Dioptric Phocoena)
- Maniyin Whale (Macrocephalus na jiki)
- Pygmy maniyyi (kogia breviceps)
- Dwarf maniyyi (Koya sima)
- Blainville's Beaked Whale (Mesoplodon densirostris)
- Gervais Beaked Whale (mesoplodon europaeus)
- Grey's Beaked Whale (mesoplodon grayi)
A cikin hoton za mu iya ganin whale matukin jirgi na kowa:
Idan kuna son karanta ƙarin labarai makamantansu Cetaceans - Ma'ana, Nau'i da Halaye,, muna ba da shawarar cewa ku shiga ɓangaren Curiosities na duniyar dabbobi.