Kisan kifi | |||||||||||
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Kisan Whale a Okinawa Aquarium, Japan | |||||||||||
Tsarin kimiyya | |||||||||||
Mulkin: | Eumetazoi |
Infraclass: | Platin |
Lantarki: | 'Yan Cetaceans |
Superfamily: | Delphinoidea |
Jinsi: | Kananan kifayen kifi (Yankin Pseudorca Reinhardt, 1862) |
Duba: | Kisan kifi |
Kananan kisa Whale , ko bakar fata kisa (lat. Pseudorca crassidens), dabbobi ne masu shayarwa daga asalin jinsin halittar yankuna masu kashe dabbobi (Yankin Pseudorca) Iyalan Dolphin (Delphinidae).
Zasu iya rikitarwa tare da dabbobin ruwa, suna ba da kayan sarrafawa - kisa whales.
Bayyanar
Babban launi baki ne ko launin toka mai duhu, tare da farin rabe a ventral gefen. Wasu mutane suna da launin toka mai tsini a kawunansu da kawunansu. Shugaban yana da zagaye, goshi yana da siffar kankana. Jikin yana da elongated. Doarshen dorsal mai fasalin sikelin ne, yana fitowa daga tsakiyar baya, pewan doki yana da kaifi. Babban muƙamuƙi ya fi tsayi da ƙananan.
Maza manya daga cikin karamin kifen kifi Whale sun kai 3.7-6.1 a tsayi, mata manya - 3.5-5 m. Jikin jiki ya yi girma daga 917 zuwa 1842 kg. Sabbin jarirai suna 1.5-1.9 m tsawon kuma suna kimanin kilogram 80. Doarshen dorsal zai iya kai tsawon 18-40 cm a tsayi. Jiki ya fi sauran dabbobin dolphin ike. Fin ɗin yakai kusan sau goma akan jikin mutum. A tsakiyar shi yawanci alama ce mai kyau, ƙarshen ƙare yana da kaifi. A kowane gefen muƙamuƙi akwai hakora 8-11.
Tsawon kwanyar cikin mace shine 55-55 cm, a cikin maza - 58-55. Yawan vertebrae shine 47-52: 7 na mahaifa, 10 thoracic, 11 lumbar, da 20-23 caudal. Kilan ƙananan kifi kifi suna da nau'i biyu 10 hakarkarinsa.
Wannan jinsin galibi ana rikitar da dabbobin dolphins (Tursiops da keɓaɓɓen), gajere-nikGlobicephala macrorhynchus) da dogon fin nika (Globicephala melas), saboda suna zaune a yanki guda. Ko yaya dai, dabbobin ruwa ba su da kwari, kuma a cikin nika da ƙananan kifayen kifayen ana samun bambance-bambance da yawa a cikin tsarin fin fin ɗin.
Halayyar
Kilan ƙananan kifayen kifi suna zaune a cikin tekuna masu zafi da yanayi. Wani lokaci sukan zo bakin teku, amma sun gwammace su zauna a zurfafa. Ruwa zuwa zurfin of 2 km.
Suna zaune cikin ƙungiyoyi inda za'a iya samun karnukan karnukan karnuka masu yawa na shekaru daban-daban. Irin waɗannan manyan rukunin galibi ana rarrabe su zuwa ƙarami. Matsakaicin, lambar su 10-30 ne.
Wan ƙananan kifayen khalil ana yin wanka da bakinsu sau da yawa cikin adadi masu yawa. An ba da rahoton Mass Massach a cikin rairayin bakin teku a Scotland, Ceylon, Zanzibar da kuma gefen gabar ruwan Burtaniya.
Don sadarwa da juna, yi amfani da echolocation a cikin kewayon daga 20 zuwa 60 kHz, wani lokacin 100-130 kHz. Kamar sauran kifin kisa, ƙananan kifayen whales na iya yin sautikan kamar su raɗa, ƙara, ko sautin fitattun kalamai. Za a iya jin murhun sowa na Whales daga zurfin 200 m.
Abinci mai gina jiki
Kilan ƙananan kifayen kifi sune kifaye, suna cin kifi da squid, wanda suke motsawa da sauri. Ana iya cin abincin dabbobi masu shayar da dabbobi, kamar su hatimi ko zakuna na teku a wasu lokuta. Na kifi, irin kifiOncorhynchus), mackerel (Sarda lineolata), herring (Pseudosciana manchuricada kuma perch (Japonicus Lateolabrax).
Kiwo
Duk da cewa ƙananan kifayen kifayen suna haifar da shekara-shekara, ganiyarsa tana sauka akan lokaci daga ƙarshen hunturu zuwa farkon bazara. Ciki yakan kai watanni 11-15.5. Kitari daya ne kawai aka haife. Ya kasance tare da mahaifiyarsa har tsawon watanni 18 - 24, a daidai wannan lokacin, ɗaukar jariri yakan faru. Balagagge yakan faru ne a shekara 8-10 a cikin maza kuma a shekaru 8-11 a cikin mata. Bayan sun haihu, mace ba za ta iya haihuwar koran a lokacin shekara 6.9 ba.
Kittens suna iya motsi mai 'yanci kai tsaye bayan haihuwa. Bayan yinda sukayen, yawanci suna kasancewa tare da uwarsu guda.
A cikin daji, maza suna rayuwa a matsakaicin shekaru 57.5, mata - shekaru 62.5. Ba a san lokacin rayuwa a cikin bauta ba.
Rarraba
An rarraba ƙananan kifayen kisa a cikin Tekun Atlantika, Pacific da tekun Indiya. A arewaci, ba sa iyo arewacin 50 ° C. sh., a kudu - kudu daga 52 ° kudu. w.
Ana iya samun wannan nau'in a New Zealand, Peru, Argentina, Afirka ta kudu, a arewacin Indian Ocean, Ostiraliya, tsibirin Indo-Malayan, Philippines da kuma arewacin Tekun Rawaya. An samo ƙananan kifayen kisa a cikin Tekun Japan, a cikin lardunan bakin tekun na Burtaniya Columbia, Bay na Biscay, da Tekun Bahar Rum da Tekun Bahar Rum. Wasu mutane suna zaune a cikin Gabar Tekun Mexico da kewayen tsibirin Hawaiian.
Matsayin tsaro
A cikin tekun tekun China da Japan, an kiyasta adadin ƙananan kifayen kisa a ƙalla mutane 16,000, a cikin Tekun Mexico - a cikin mutane 1038, a tsibirin Hawaii - 268, a gabashin Tekun Pasifik, yawan wannan nau'in ya ƙunshi kusan 39,800 dabbobi.
Duk da cewa akwai sabani game da raguwar ƙananan kifayen kifayen, akwai tabbataccen tabbaci na raguwar adadin kifayen da ake iya yankewa a cikin mazaunan kifayen kifayen. Wannan halin na iya haifar da raguwar lambobin su.
A Japan, ana amfani da ƙananan kifayen kifi a matsayin abinci, kuma a Caribbean ana kashe su don nama da mai. Wataƙila an kashe adadi a tsibirin Taiwan. A kusa da tsibirin Ica, kusan kifayen kifi 900 aka kashe a lokacin kamun kifi daga shekarar 1965 zuwa 1980.
A Arewacin Ostiraliya, kifayen kisa sukan kasance cikin raga a cikin tarun kifayen. Hakanan zasu iya hadiye datti da filastik, wanda galibi yakan haifar da mutuwa. Kamar sauran kifayen khalifofi, ƙananan kifayen khalifofi suna da saukin kamuwa da sauti mai ƙarfi, kamar su jiragen ruwa na sonars da farfadowa na ruwa. Canjin yanayin sauyin yanayin duniya a Duniya na iya cutar da yawan su, duk da cewa ba a san ƙarin tabbatattun abubuwan hasashen yanayi ba.
Inda kisa Whales ke zaune
Gidajen kananan kifayen kifi suna shimfidawa zuwa tsaftataccen ruwa da ruwa na tekuna. Wadannan dabbobi masu shayarwa ana samunsu a cikin Jar Teku da Bahar Rum, a cikin Tekun Atlantika. A Tekun Pasifik, suna zaune a cikin latitude daga New Zealand zuwa Japan. A gabashin Pacific, ƙananan kifayen kifi suna zaune kusa da Cape Horn da kuma bakin tekun Alaska. A cikin Tekun Indiya, wannan nau'in ya zaɓi gabashin gabashin Afirka, da kuma cikin ruwan kudu maso gabas da gabashin Asiya.
Kisan kifi Whales suna zaune a cikin tekuna da tekun.
Saurari muryar mai kisa Whale
Wadannan dabbobi masu shayarwa suna zaune a cikin manyan garkuna. Sun yi ƙaura don nesa ba kusa ba, wato, daga bakin tekun Afirka wannan nau'in ba zai tashi zuwa gabar Australiya ba.
Wan ƙananan kifayen khalifofi masu yawan dabbobi masu shayarwa.
Abubuwan ban sha'awa game da ƙananan kifayen kisa
Wani fasalin wanda bai iya warwarewa ba shine yanayin fitowar mutane lokaci-lokaci. Misali, a cikin 2005 a cikin ruwan kudu maso yammacin Ostiraliya, watau a cikin Gulf of Geograph, an jefa ƙananan kifayen karnuka ɗari da dama a cikin ƙasa. Jikinsu baƙi ya cika kusan bakin tekun. A gefen tekun, an gano ƙungiyoyi 4 daban-daban; nisan da ke tsakanin ƙungiyoyin ya kai kimanin mita 300. Wataƙila sun kasance garken dabbobi daban-daban, waɗanda saboda wasu dalilai sun hau jirgin ruwa guda.
Godiya ga kokarin hukumomin yankin, an kubutar da dabbobin mara kyau an koma cikin ruwa. Shige da bakin mutane ya taimaka wajen kauce wa yawan mutuwar kananan kifayen kisa. A cikin adadin, mutum ɗaya ne kawai ya mutu. Wannan aikin ceton ya bukaci halartar masu sa kai 1,500.
Wani lokacin kifayen kifi suna wanka a hankali.
A karshen shekara ta 2009, a gabar Tekun Afirka ta Yamma, a kasar Mauritania, an kuma wanke kananan kifayen bakin teku a gabar teku. An samo su da sanyin safiya, kuma da ƙarfe 10 na safe. Manyan masu ba da agaji sun hallara, waɗanda ƙoƙarinsu ya sami nasarar share bakin tekun daga ƙananan kifayen da misalin karfe 4 na safe. Amma mutane ba su sami nasarar ceton mutane 44 a wannan lokacin ba.
Wannan hali na ƙananan kifayen khalifofi ba su sami cikakken bayani ba. Akwai zaton cewa wadannan ayyuka suna da alaƙa da wasu hanyoyin ruwa da ke gudana a cikin dunƙulewar ƙasa, wanda kuma mutane ba su san komai ba, tunda suna ƙarƙashin ƙarƙashin ruwa. Amma me yasa yasa ba a jefa sauran dabbobin ruwa lokaci guda tare da kananan kifayen kifi ba? Wannan shine, irin wannan halayen yana faruwa ne kawai tare da jinsin mutum ɗaya, yayin da wasu wakilan zurfin teku suke nuna halin mutuntaka.
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