Wadatacce
The masu shayarwa na ruwa rukuni ne na kusan nau'ikan 120 masu shayarwa, wanda tsawon lokaci ya daidaita da rayuwar teku, ya danganta da wannan sararin samaniya don ciyar da kansu da rayuwa.
Wannan sifa ta farko tana da mahimmanci, tunda a cikin kowane yanayi ya samo asali daga dabbar dabbobi masu shayarwa zuwa dabbar da ta dace da ruwa, kuma ba akasin haka ba. Ana ganin dabbobi masu shayarwa na ruwa dabbobi ne babban hankali, kuma a lokuta da yawa ana son su ƙwarai da gaske don dalilai daban -daban: wannan shine dalilin da yasa galibi suke zama cikin haɗari.
Halayen jiki na masu shayarwa na ruwa nuna ikon su na rayuwa cikin ruwa, tare da digiri daban -daban na daidaitawa. A wasu lokuta wutsiya tana zama fin caudal a kwance, a wasu kuma kwarangwal ɗin yana aiki azaman fin dorsal. Ya zama ruwan dare cewa ba yawa gashi sai na kai, kuma hancin yana buɗewa a saman kai don fitar da ruwa.
Ta yaya suke numfashi?
Yawancin waɗannan dabbobin suna da buƙatun iskar oxygen kamar na ɗan adam, tare da tsarin numfashi iri ɗaya. Ba su da huhun huhu mafi girma fiye da na ɗan adam, amma suna da ƙimar jini mafi girma: gadon jijiyoyin jini ya fi girma girma, kuma a fili yana aiki azaman tafkin jinin oxygenated. A cikin jini, waɗannan dabbobi masu shayarwa suna da kaso mafi yawa na jajayen ƙwayoyin jini, suna ba tsokoki launi mai duhu sosai.
Cewa dabbobin masu shayarwa suna iya rayuwa cikin ruwa shine ƙarfin da ya burge maza tun lokacin da suka kasance a doron ƙasa, wannan shine dalilin da yasa koyaushe suke ƙoƙarin nuna wannan nau'in dabbobin, kuma an haɗa su cikin labarai da tatsuniyoyi. yana ba shi kyawawan halaye.
Daga karni na 15, labaran irin wannan sun ba da labarin farauta, kuma kifayen ruwa sun zama babban abin jan hankali ga wannan aikin.
Jerin da ke gaba yana nuna wasu misalan dabbobin dabbobi masu shayarwa masu iya rayuwa a cikin Ruwa.
Misalan masu shayarwa na ruwa
- Whale: Babbar dabba a duniya. Yana rayuwa cikin ruwa, amma ana samar da abincin sa kamar yadda masu shayarwa suke. Calan maruƙan suna auna mita 7 kuma suna auna ton 2 a lokacin haihuwa.
- Dolphin: Suna da jikin fusiform tare da babban kai. Launin launi yawanci launin toka ne, kuma yana iya amfani da sauti, tsalle da rawa don sadarwa tare da kewayenta. Wannan shine dalilin da ya sa aka san shi da ɗayan nau'ikan masu hankali.
- ruwan saniya.
- Walrus: Manyan dabbobi masu shayarwa, waɗanda, gwargwadon nau'ikan da ake tambaya, halaye da yawa za su canza. Maza suna zubar da gashin kansu sau ɗaya a shekara, yayin da mata na iya ɗaukar tsawon lokaci.
- Beaver: Akwai nau'o'i uku a ko'ina cikin duniya. An san su da halin su na iya yin madatsun ruwa ta hanyar sare bishiyoyi, da kuma kasancewa irin jinsin mai ban tsoro.
- Beluga.
- Killer whale: A cewar ƙungiyar, tana gabatar da kyawawan halaye. Iyalan suna jagorancin mace wacce ke aiki a matsayin kai da uwa, kuma ƙungiyoyin ba sa wuce mutum goma kuma za su iya kasancewa cikin kwanciyar hankali akan lokaci.
- Seal: Gaba ɗaya ba su da kunnen waje, yayin da gabobin bayansu ke komawa baya, don haka ba su da ƙwarewa sosai a motsi ƙasa.
- Narwhal.
- Otter: Ruwa shine muhallin da kuka fi jin daɗi, kodayake shi ma yana kare kansa da kyau a cikin yanayin ƙasa.
- Zakin teku: Dabba ɗaya ce kawai daga cikin ƙungiyoyin tsintsaye waɗanda ke da kunnuwa. Fitowar su ta bambanta fiye da ta kowane iyali gwargwadon shekaru da jinsi: maza suna da dogayen wuya da kauri dangane da sauran jiki. Sun fi yawan lokacinsu a cikin teku, kuma suna cin kifi.
- Siffar whale.
- Platypus: Yana kama da ƙaramin dabba, amma yana da nauyi sosai. Gabaɗaya yana ciyar da kwari na ruwa da tsutsotsi, crustaceans da mollusks na ruwa.
- Labaran batsa.
- Hippopotamus: Wani kauri mai kauri a karkashin fata yana kare shi daga sanyi. Bakinsa a buɗe zai iya auna har zuwa mita, kuma yana rayuwa cikin ruwa da rana: idan ya yi duhu, ya fita ya yi tafiya don neman abincinsa.
Bi da:
- Dabbobi masu shayarwa
- Amphibians
- Dabbobi masu rarrafe
