Kafin gano yadda sharks ke bacci, kuna buƙatar gano ko, bisa ƙa'ida, waɗannan dodanni na teku (waɗanda nau'ikan 450 ke wakilta) sun saba da irin wannan tunanin kamar bacci.
Shin sharks suna bacci ko kuwa?
Kyakkyawan bacci (kamar mutum) baƙon abu bane ga sharks. An yi imanin cewa duk wani kifin kifin kifin shark yana ba wa kansa damar fiye da mintuna 60 na hutawa, in ba haka ba ana yi masa barazanar shaƙa.... Lokacin da yake shawagi, ruwa yana zagaye shi kuma yana wanke magudanan ruwa, yana tallafawa aikin numfashi.
Yana da ban sha'awa! Yin barci cikin sauri yana cike da dakatar da numfashi ko faɗuwa zuwa ƙasa, sannan mutuwa ta biyo baya: a zurfin zurfin, kifin mai bacci zai daidaita shi ta matsi.
Barcin waɗannan tsoffin kifin da ke rayuwa (rayuwa a duniya sama da shekaru miliyan 450) ana iya danganta shi da ɗan hutawa da gajartar ilimin lissafi, wanda ya fi zama kamar mai bacci.
Swim don numfashi
Yanayi ya hana shark ɗin mafitsara (abin da duk kifi mai kyau yake da shi), yana biyan diyyawar mummunan tasirinsu da kwarangwal, babban hanta da ƙugu. Yawancin kifin kifin kifi ba su daina motsi, saboda tsayawa abu ne da ke nutsewa nan take.
A cikin matsayi mafi fa'ida fiye da waɗansu kifayen yashi ne, waɗanda suka koyi haɗiye iska da adana shi a cikin aljihun ciki na musamman. Organirƙirar kwayar halittar hydrostatic (maye gurbin mafitsara) ba kawai ke da alhakin fashewar yashi ba, amma kuma yana sauƙaƙa rayuwarta sosai, gami da gajeren hutu na hutu.
Numfashi ya zauna
Sharks, kamar kowane kifi, suna buƙatar oxygen, wanda suke karɓa daga ruwan da ya ratsa ƙoshinsu.
Gabobin numfashi na shark sune jaka na gill wadanda ke fita daga buɗewar ciki zuwa cikin maƙogwaron, da na waje a saman jiki (a gefen kai). Masana ilimin kimiyyar halitta sun kirga daga 5 zuwa 7 nau'i-nau'i na gill a cikin jinsuna daban-daban, waɗanda suke a gaban ƙofar firam. Lokacin numfashi, jini da ruwa suna motsawa gaba ɗaya.
Yana da ban sha'awa! A cikin kifin bony, ruwa yana wanke ƙwarjiyoyin saboda motsi na murfin gill, waɗanda babu su a cikin sharks. Sabili da haka, kifin da ke gishiri yana tura ruwa tare da ramin gill na gefen kai: yana shiga bakin kuma yana fita ta rami.
Dole ne shark ya ci gaba da motsawa tare da buɗe bakinsa don kada numfashi ya tsaya. Yanzu ya bayyana karara dalilin da yasa sharks, aka sanya a cikin ƙaramin tafki, suka tafa bakunansu: basu da motsi, sabili da haka iskar oxygen.
Yadda sharks ke bacci da hutawa
Wasu masanan ilimin kimiyyar halittu suna da tabbacin cewa wasu nau'ikan kifin kifin na sharks na iya yin bacci ko shakatawa, suna dakatar da aikin locomotor na dindindin.
An san cewa suna iya kwance kwance a ƙasa:
- farin ruwa
- damisa sharks;
- wobbegongs;
- mala'ikun teku;
- ƙwararrun masarufin jinya.
Wadannan nau'ikan benthic sun koyi tsotse ruwa ta gill ta amfani da bude / rufe bakin da kuma aiki tare na tsokar gill da pharynx. Ramin da ke bayan idanu (squirt) shima yana taimakawa mafi kyawun zagawar ruwa.
Masana ilimin halittu sun ba da shawarar cewa kifayen kifayen da ke rayuwa a cikin zurfin ruwa ana tilasta su motsawa koyaushe saboda raunin tsokoki na gill, wanda ba zai iya jimre da yin famfo ruwa ta cikin kwazazzabon ba.
Yana da ban sha'awa! Masana kimiyya sunyi tunanin cewa sharks masu zafi (kamar dolphins) suna barci, suna kashe gefen hagu da dama na kwakwalwa a madadin.
Akwai sauran sigar da ke bayanin yadda bacci yake. An yi imanin cewa wasu nau'ikan suna ninkaya kusan zuwa gaɓar tekun, suna gyara jikin tsakanin duwatsu: yayin da kwararar ruwan da ake buƙata don numfashi an ƙirƙira ta igiyar ruwa.
A cewar masana ilimin kimiya, sharks na iya yin bacci a ƙasa idan suka sami keɓantaccen wuri tare da canjin canjin yanayi a cikin yanayin ruwa (daga manyan ruwa ko igiyar ruwa). Tare da irin wannan barcin, an rage amfani da iskar oxygen zuwa kusan sifili.
Hakanan an samo abubuwanda ke tattare da yin bacci a cikin sharks masu kare gashin baki, wadanda suka zama ababen bincike daga likitocin neurophysioio. Masana kimiyya sun cimma matsaya cewa batutuwa na gwajin su na iya bacci ... yayin tafiya, tunda cibiyar jijiya da ke motsa jiki tana cikin ƙashin bayan. Wannan yana nufin cewa kifin kifin shark na iya iyo a cikin mafarki, tun da ya katse kwakwalwar.
Hutu a cikin Caribbean
An gudanar da jerin ganin kifin shark a kusa da yankin Yucatan da ya raba Tekun Mexico da Caribbean. Kusa da teku, akwai wani kogo da ke karkashin ruwa, inda masu bincike suka gano kifayen kifayen da ke bacci mai kyau (da farko kallo). Su, ba kamar kifaye masu tsalle-tsalle ba, ana ɗaukarsu masu aikin iyo, masu saurin juzu'i a cikin ruwa.
Idan aka duba sosai, sai ya zamana cewa kifin ya yi numfashi 20-28 a minti daya, ta amfani da tsokar da bakin. Masana kimiyya suna kiran wannan hanyar ta gudana-ko iska mai wucewa: an wanke gill ɗin da ruwa daga sabbin maɓuɓɓugan da ke kwarara daga ƙasa.
Masanan Ichthyologists suna da tabbacin cewa sharks suna ɗaukar kwanaki da yawa a cikin kogo tare da raunin halin yanzu, kwanciya ƙasa da faɗuwa cikin wani nau'in torpor, wanda a cikin sa dukkan ayyukan ilimin lissafi ke raguwa sosai.
Yana da ban sha'awa! Sun kuma gano cewa a cikin ruwan kogon (albarkacin sabbin maɓuɓɓugan ruwa) akwai ƙarin oxygen da ƙarancin gishiri. Masana ilimin halittu sun ba da shawarar cewa ruwan da aka canza ya zama kamar magani mai hanawa akan kifaye.
Ta mahangar masana kimiyya, sauran a cikin kogon ba su yi kama da mafarki ba: idanun kifayen sharks sun bi motsin mahaɗan jirgin ruwa.... Bayan ɗan lokaci kaɗan, an kuma lura cewa, ban da kifayen kifayen, an tsara wasu nau'ikan don hutawa a cikin kayan abinci, gami da naman kifin, da yashi, da yankin Caribbean, da shuɗi da shanu.
