Keith - kifi ko dabba mai shayarwa? Ban sha'awa facts game da Whales

Keith - kifi ko dabba bace? Wannan tambaya dami masana kimiyya dogon kafin zuwan kimiyyar zamani. A musamman, wannan matsala da aka ƙoƙarin shirya irin wannan baiwa ra'ayin, kamar yadda Aristotil. Kuma kamar haka ne ya zo a cikin wannan Tsayawa akan matsayin cewa mu Sahaban. Amma bari mu duka domin.

Keith - wannan shi ne mafi majestic mazaunan na ruwa al'arshi. Tare da size da kuma alherin shi kwatantuwa da kowane dabba, ba a ma maganar da ban mamaki ikon raira songs. Amma abin da kuma ba da muka sani game da wadannan m halittunSa?

Wane ne Whale?

To, abin da yake da ma'anar na Whale? Bisa ga kamus, shi ne mai manyan dabbobi masu shayarwa da cewa na zaune a cikin teku. Abin da ya ce, a bambanta da baya, a sami wani bayani irin wannan a garwaya batun sauƙin. Amma ta yaya ya faru da cewa wani zuriyar wani tsoho Whale so ka musanya ƙasa a cikin teku?

To, ƙashin gaskiya, masana kimiyya har yanzu ba su sani ba. Duk da haka, an san cewa miliyan 60 da suka wuce magabatan duk cetaceans, da farko ya fita neman nasu abincin da baya a cikin ruwa. Zai yiwu wannan ya kai su shafe tsawon fari, wanda ya hallaka wani ɓangare na ciyayi a duniya, ko da wani yawa na gasar daga wasu dabbobi. Amma gaskiyar da ya rage - magabatan Whales ba ya so ya koma zuwa ga ƙasar.

Yaya ƙasar dabba ya saba da rayuwa karkashin ruwa?

Ya kamata a fahimci cewa irin wannan metamorphosis ba ya faruwa a daya ko shekaru biyu. Juyin Halitta - shi ne wani jerin kananan canje-canje da cewa yin for millennia rai kwayoyin ne kullum mutating. Wannan yana yiwuwa ya haifa dukan sabon look, ta sha bamban daga magabatansu.

Amma duk da haka bayan da miliyan 60 shekaru, da masu bincike har yanzu samu a Whale kwarangwal tsarin amo mara sa a daga waɗanda zamanin da, a lõkacin da ya yi tafiya a kan ta hudu paws a kan ƙasar. Alal misali, yana da hip kashi, wanda aka located a raya wani bangare na jiki. Har ila yau, ta gaban ƙege da irin wannan kashi tsarin da yawancin zata tsage-hoofed dabbobi.

Bayan kammala wani yawan karatu, masana kimiyya sun zo da wani m ƙarshe. Sai dai itace cewa mafi kusa zumunta na cetaceans ne hippos. Kuma idan ka duba a hankali, wasu kamance cikin ayyukansu za a iya gani ko da a yau. A musamman da babban marmarin ruwa.

The iyali na Cetaceans

Ya kamata a lura da cewa Whale - shi ne ba kawai wakilin iyalinsa. Dolphins da porpoises ma kunshe a cikin category na marine dabbobi masu shayarwa. Ta yaya suka sha bambam da sauran mazaunan ruwa zurfin?

• Da fari dai, duk Whales ne dumin jiki, sabanin kifi. Wannan ne ya sa suke haka da yawa a bukatar mai kyau jiki mai cewa zai iya kare su daga sanyi na karkashin ruwa mulkin.
• Na biyu, wannan iyali ba zai iya cire oxygen daga ruwa. Saboda haka, ya kamata kullum su zo da surface, domin replenish ya samar da iska zuwa huhu.
• Na uku, su ciyar da 'ya'yansu madara. Ko da yake, a cikin shekarun da juyin halitta daga wannan tsari ne kadan bata ne, cetaceans har yanzu dabbobi masu shayarwa.

Dukan iyalin ne zuwa kashi uku manyan kungiyoyin:

• Baleen Whales (Mysticeti) - mafi girma a detachment na iyali. Its bayãnin hukuncin alama ne na musamman tace jiki "whalebone", wanda aka located a kan babba muƙamuƙi na dabba. Its main aiki - tace plankton daga wašanda ba'aso impurities.
• Toothed Whales (Odontoceti) - by da kuma manyan da yara, preying a kan squid da kananan kifi. Wannan nau'in shi ne iya kewaya a ruwa ta amfani da echolocation.
• Ancient Whales (Archaeoceti) - Abin takaici, ba wata guda wakilin wannan rukuni, ba zai rayu har zuwa kwanakin nan namu.

Whales: general bayanai

Daga cikin dukan mazaunan duniya Duniya Whale - mafi girma dabba bace. A talakawan adult mutum zai iya isa 25 mita a tsawon. Don kwatanta, wajen guda dauki 4 manyan motoci, idan suka sa a jere. Ba abin mamaki ba cewa irin wannan babban abu Tã yi game da 90-110 ton, da kuma wasu ma fiye.

Wadannan Refayawa rayuwa a kusan duk teku na duniya. Abin da yake gaskiya, da suka iya yi ƙaura daga wuri daya zuwa wani dangane da kakar. Wannan hali ne saboda gaskiyar cewa Whales masu kula ruwa zazzabi, sabili da haka hunturu da suke ciyarwa, mafi kusanta ga yammacin sahara.

Overall, a cikin dukan 'yan wannan iyali za a iya bambanta biyu jinsin subspecies: shudi da launin toka Whales. By kuma manyan, wannan rabo ne saboda da launi na fata na wadannan dabbobi, amma akwai sauran, babu kasa muhimmanci bambance-bambance.

amo mara sa na baya

Gray Whale - shi ne mafi tsufa wakilin iyali. Masana kimiyya sun samu ragowar wadannan dabbobi a kan m bincike ya game miliyan 30 shekaru. A baya can, wadannan Refayawa rayu a kusan dukkan sassan duniya, amma yanzu za su iya a samu kawai a arewacin tekun Pacific.

Wadannan halittu amfani da su zauna a cikin kananan kungiyoyin na kimanin 2-3 mutane a cikin kowane. Ko da yake sau da yawa za ka iya saduwa da, da kuma wani LonE Whale alfahari plowing da ruwa sarari. Amma duk da haka mafi daga cikin Refayawa fi son su rayu a cikin wani rukuni. By kuma manyan wannan ne saboda gaskiyar cewa m Whale ne sosai karfi raya iyali dangantaka.

Zai yiwu shi ne wannan jam'iyya ya taimake su tsira da m sau. Bayan duk, a cikin tsakiyar karni XX su kusan gaba daya halakar da whalers, nemi su kitse. Saboda haka, bisa ga masana kimiyya, a shekarar 1946 yawan wadannan dabbobi masu shayarwa an rage zuwa 250 mutane. Kawai ta da wata mu'ujiza, da kuma kokarin dabba hakkin gwagwarmaya gudanar don kauce wa bala'i. Yanzu yawan wadannan dabbobi ya karu zuwa dubu 30., Wannan ya ba su sabon bege ga mafi nan gaba.

Blue Whale - mafi girma dabba a cikin ƙasa

Amma ga blue Whales, suna dauke su ne mafi girma halittu a wannan duniyar tamu. Ko da irin wannan babban dabba kamar wata giwa, iya gasa tare da su. Wadannan masu girma dabam an tunãtar da cewa a lokacin da wani abu kamar Refayawa tafiya dukan surface na Duniya. Yanzu, da blue Whale - kadai wakilin na zamanin d dabbobi Refayawa.

Wannan dabba ne ba musamman fan of mutane, sabili da haka da wuya ta halarci bakin tekun. Ya fi so matsakaici ne bude teku, inda ya ji da gaske free. Ya motsa quite sannu a hankali, amma tare da gudun 10-12 km / h, amma a gaggawa ta iya kara uku-Musulunci.

Kamar dukan 'yan jinsin, da blue Whale Ciyarwar a plankton. Kuma ko da yake wannan dabba ya dade maye gurbin ƙasar a kan ruwa, to zauna a shi, shi har yanzu iya ba. Wannan shi ne dalilin da ya sa Whales kamar yadda sau da yawa taso kan ruwa a farfajiya, ta haka ne sakewa ruwa daga marẽmari musamman bude located a kan babba jiki.

haifuwa Whales

Whales - tẽku dabbobi, wanda yawansu sukan rage wa catastrophic matakan. Wannan tushe ne daga mutanen nemi su nama da mai. Shi ne su, sũ ne babban laifi daga wadannan bakaken, amma ba ne kawai suke.

Wani factor shafi jama'ar na wani jinsin, shi ne ta ikon haifa. Saboda haka, matsalar ta'allaka ne da cewa wadannan halittu kai zuriya haifa ba fiye da sau daya a kowace daya ko shekaru biyu. Kuma yayin da mace ya haifa daya kawai kadan kifi Whale, a kalla - biyu. A lokaci guda, dangane da subspecies Whales ciki na iya wuce tsakanin 9 da 18 months.

M ne da cewa uwar ko da yaushe yana kula da ta kwiyakwiyanta. Wadanda, bi da bi, hanzari girma da kuma samun nauyi. Saboda haka, a kan talakawan, da rana shorthead iya samun game da 50 kg live nauyi. Saboda haka kada ka yi mamaki da cewa ga wasu watanni bakwai, ya iya vymahal up to 14 mita a tsawon kuma ku auna nauyi 20-25 ton yayin.

Kuma ko da yake mafarki Whales zo a cikin shekaru 4-5 shekaru, cikakken fledged, adult mutane su ne kawai 14-15, da shekara ransa.

Keith: Interesting Facts

'Yan mutane san cewa:

• Whales - kadai sauran mutum wanda zai iya raira waƙa. Ko da yake shi da aka a baya tunanin cewa wannan ikon ne kawai ga maza, kwanan nan karatu sun tabbatar da haka ba. Saboda haka, ma, da mace Whales raira songs, musamman da kadan Pups.
• A cikakken ciki blue Whale iya rike har zuwa biyu ton na live abinci. Alal misali, wannan kama dauki da talakawan kama kifi boats.
• Idan muka magana game da nauyi na wani kifi Whale, shi ya kamata a tuna da cewa daya daga harshensa Tã game 3 tons. Amma ga sauran jikin, misali, da zuciya iya isa 600-700 kg.
• Ko da yake kasar Sin zauna a cikin hip kashi, shi ne gaba daya mara amfani. Haka kuma, shi ba ko da alaka da babban ɓangare na kwarangwal.