Salmon shark (Lamna ditropis) na cikin kifin gwangwani, dangin kifin shark.
Salmon shark ya yada.
An rarraba kifayen kifin Salmon a duk yankuna na bakin teku da na pelagic a cikin ƙananan raƙuman ruwa da ƙananan yanayin Tekun Arewacin Pacific, wanda ke tsakanin 10 ° N. sh da 70 ° arewa latitude. Yankin ya hada da Tekun Bering, Tekun Okhotsk da Tekun Japan, kuma ya fadada daga Tekun Alaska zuwa Kudancin California. Yawanci ana samun kifin kifin Salmon a cikin zangon 35 ° N. - 65 ° N a cikin ruwan yamma na Tekun Fasifik kuma daga 30 ° N. har zuwa 65 ° N a gabas.
Wurin zama na Salmon shark
Kifin kifin Salmon galibi mai yawan tashin hankali ne amma kuma yana zaune a gabar ruwan. Yawancin lokaci suna zama a cikin layin ruwa na yankin subarctic, amma kuma suna iyo a cikin zurfin ruwa na yankunan kudu masu dumi a zurfin aƙalla aƙalla mita 150. Wannan jinsin ya fi son yanayin ruwa tsakanin 2 ° C da 24 ° C.
Alamomin waje na kifin kifin kifi.
Manyan kifin kifin kifi na aƙalla nauyin kilogiram 220. Sharks a arewa maso gabashin Pacific sun fi nauyi fiye da sharks a yankunan yamma. Tsawon jiki ya bambanta a girman daga 180 zuwa 210 cm.
Yawan zafin jiki na jikin kifi daidai yake da zafin ruwan da ke kewaye da shi.
Kifin kifin Salmon na iya kiyaye zafin jikinsa sama da na yanayi (har zuwa 16 ° C). Wannan nau'in kifin na kifin 'shark' yana da nauyi, mai siffa irin ta spindle da gajere, hancin hanci. Gill slits suna da ɗan tsayi. Bude bakin yana da fadi da zagaye. A saman muƙamuƙi, akwai hakora 28 zuwa 30, a kan ƙananan muƙamuƙi - 26 27, manyan hakora masu matsakaici tare da haƙoran gefe (ƙananan tubercles ko “ƙananan-hakora”) a ɓangarorin biyu na kowane haƙori. Arshen ƙarshen dorsal ya ƙunshi ƙanƙanin dorsal ƙanana da girma da yawa. Finfin farji ƙarami ne. Finararren caudal yana da siffar jinjirin wata, a cikin abin da dorsal da ventral lobes kusan kusan girma suke.
Fins din da aka hada guda biyu manya ne. Wani fasali na musamman shine kasancewar keɓewa a kan ƙwanƙwasa da ƙananan igiyoyin sakandare kusa da wutsiya. Launin launukan baya da na gefen gefe duhu ne mai launin shuɗi zuwa baƙi. Ciki fari ne, kuma galibi yana da duhu daban-daban a cikin manya. Hannun hancin hancin kuma launi ne mai duhu.
Kiwon kifin kifin kifi.
Maza suna kiyayewa kusa da mata, suna kama su ta hanyar amfani da ƙafafunsu yayin saduwa. Sannan nau'ikan sun bambanta, kuma kifin ba shi da sauran abokan hulɗa. Kamar sauran kifayen kifayen kifi, kawai ƙwayayen da suka dace a cikin kifin kifin kifi. Takin ciki na ciki ne, kuma haɓakar amfrayo yana faruwa a cikin jikin mace. Wannan jinsin yana da ovoviviparous kuma ana kiyaye amfrayo masu tasowa, irin wannan ci gaban yana taimakawa ga rayuwar zuriya.
Tsintsa yakan ƙunshi kifin sharks na yara 4 zuwa 5 wanda yakai tsayi daga 60 zuwa 65 cm.
Kifin kifin Salmon a cikin ruwan arewa suna haihuwa cikin watanni 9 a kaka, kuma yawan kifaye na haihuwa suna haihuwa a ƙarshen bazara, a farkon bazara. Mata kifin kifin kifin kifi a yankin Pacific Northwest na haihuwa kowace shekara kuma suna samar da yara kifayen kifayen yara 70 a rayuwarsu. Yayin da daidaikun mutane a arewa maso gabashin Tekun Fasifik ke haihuwa duk bayan shekaru biyu. Maza na iya hayayyafa a tsayin jikinsu kimanin 140 cm da shekaru 5, yayin da mata ke ba da zuriya a tsawon jiki 170 da 180 cm lokacin da suke da shekaru 8-10. Matsakaicin girman kifin kifin kifin na kifi ya kai kimanin 215, kuma na maza 190 cm. A dabi'a, kifayen kifin salmon suna rayuwa tsawon shekaru 20 da 30. Wannan nau'in kifin ba a taɓa kiyaye shi a cikin manyan ruwayen ruwa ba, ba a san tsawon lokacin da kifin kifin kifin kifi na iya rayuwa ba.
Salmon shark hali.
Kifin kifin Salmon masu farauta ne wadanda ba su da yanki na dindindin ko ƙaura don neman ganima. Akwai bambanci sosai a cikin yanayin jinsi a cikin wannan nau'in, wanda ake lura da shi a cikin kifin da ke zaune a Arewacin Tekun Pacific.
Yawan mazauna yamma suna da rinjaye na maza, yayin da mazaunan gabashin suke mamaye mata.
Bugu da kari, akwai bambanci a girman jikin, wanda ya fi girma a daidaikun mutanen kudu, yayin da kifaye na arewa suka fi yawa. An san kifin kifin Salmon don farauta shi kaɗai ko ciyarwa a gungu na mutane da yawa, daga 30 zuwa 40 sharks. Baƙi ne na yanayi, koyaushe suna motsawa bayan makarantun kifi da suke ciyarwa. Babu wani bayani game da dangantakar da ba ta dace ba a cikin kifin kifin salmon; wannan nau'in, kamar sauran kifin mai gishiri, yana da daidaituwa tare da taimakon masu gani, da kamshi, da sinadarai, da injina, da masu sauraro.
Salmon shark na ciyarwa.
Abincin abincin kifin kifin kifi da akeyi da shi an yi shi ne daga nau'in kifaye iri-iri, galibi daga kifin Salmon. Har ila yau, masanan kifin Salmon suna cin kifi, herring na Pacific, sardines, pollock, Pacific saury, mackerel, gobies da sauran kifaye.
Matsayin halittu na kifin kifin salmon.
Kifin kifin Salmon yana saman dutsen dala a tsarin karkashin teku, yana taimakawa wajen daidaita yawan kifaye da dabbobi masu shayarwa. Largerananan kifayen kifin salmon daga 70 zuwa 110 cm a tsayi waɗanda manyan kifayen suka yi amfani da su, gami da blue shark da babban farin kifin. Kuma a cikin manyan kifayen kifin da ke cikin kifayen akwai makiyi guda daya da wadannan mashahuran suka sani - mutum. Matasan kifin kifin kifi na kiwon kifi suna girma kuma suna girma a cikin ruwan da ke arewacin kan iyakar subarctic, waɗannan wuraren ana ɗauka su a matsayin nau'ikan "gandun daji na 'yan kifin shark". A can suna guje wa farautar manyan kifaye, waɗanda ba su iyo cikin waɗannan yankuna kuma suna farautar arewa ko kudu. Sharan kifayen sharks ba su da bambancin launuka na sama da ƙananan ɓangarorin jiki da duhun duhu a cikin ciki.
Ma'ana ga mutum.
Kifin kifin Salmon jinsin kasuwanci ne, naman su da kwai suna da matukar daraja a matsayin kayan abinci. Wannan nau'in kifin shark galibi ana kama shi a cikin raga kamar kamun-kifi yayin kama wasu nau'in kifin. A Japan, ana amfani da gabobin ciki na kifin kifi don sashimi. Ana kama waɗannan kifin yayin kamun kifi na wasanni da kuma nishaɗin yawon shakatawa.
Salmon sharks na fuskantar barazanar kamun kifi. A lokaci guda, kifayen suna cakuɗe a cikin seines da raga, ƙugiya suna barin raunuka a jiki.
Kifin kifin Salmon na da matukar hadari ga mutane, kodayake ba a rubuce bayanan gaskiya game da wannan ba. Rahotannin da ba a tabbatar da su ba game da halayyar wannan jinsin zuwa ga mutane na iya faruwa ne saboda rashin fahimta tare da wasu nau'ikan halittu masu tsananin tashin hankali kamar babban farin shark.
Matsayin kiyayewa na kifin kifin salmon.
A halin yanzu an lissafa kifin kifin salmon a matsayin "dabbare da bayanai" don shiga cikin Lissafin IUCN ba. Numbersananan lambobi na yara da jinkirin haifuwa suna sa wannan nau'in ya zama mai rauni. Kari akan haka, ba a kayyade kamun kifin kifin kifin kifin kifi a cikin ruwan kasa da kasa, kuma wannan na barazanar raguwa a adadi.
