Stelet

Sterlets tsoffin nau'in kifi ne waɗanda kuma sun dace da adanawa a cikin tafkin lambun, muddin kun san bukatunsu na musamman.

halaye

• Suna: Sterlet (Acipenser ruthenus)
• Tsarin: Sturgeons (Acipenseridae)
• Girman: 40-120 cm
• Asalin: koguna a Arewacin Rasha, magudanan ruwa na Baltic, Danube
• Matsayi: ba mai buƙata ba
• Girman akwatin kifaye: daga lita 5000
• pH darajar: 6.5-7.2
• Ruwan zafin jiki: 2-26 ° C
• Bukatu na musamman: bayyananne, ruwa mai wadatar iskar oxygen, ƙasa mai ƙaƙƙarfan ƙasa, ƙarin samun iska da ake buƙata sama da 15 ° C. Babu dindindin babban nauyin kwayoyin halitta da ƙimar nitrate sama da 100 mg / l.

Abubuwan ban sha'awa game da Sterlet

Sunan kimiyya: Acipenser ruthenus

Tsarin zamani

• Class: Actinopterygii (ray fins)
• Subclass: Chondrostei (cartilage organoids)
• oda: Acipenseriformes (sturgeon)
• Iyali: Acipenseridae (sturgeon)
• Genus da nau'in: Acipenser ruthenus

size

Lokacin da aka girma sosai, sterlets suna kan matsakaicin 40 cm kuma tsayin tsayin ya kai 120 cm. Sannan suna auna matsakaicin kilogiram 2-4, mafi girman samfuran har zuwa kilogiram 16.

Launi

A cikin yanayi, sterlets suna da launin toka-launin toka-launin ruwan kasa tare da gefuna masu farar fata da layin gefen haske wanda aka kafa ta garkuwar gefe 60-70. Shugaban yana da ƙananan baki da hanci wanda ya dan lankwasa sama. Ciki yana da haske. Haka kuma akwai kusan nau'in zabiya farar fata daga kiwo a cikin gonakin tafki da tsarin jini.

Origin

• Arewacin Rasha
• Tafsirin Tekun Baltic
• Danube

Banbancin jinsi

• Maza sun balaga cikin jima'i a shekaru 3-5, mata daga shekaru 7-9.
• Matan da suka balaga cikin jima'i ana iya gane su ta hanyar jikinsu saboda sun fi girma.
• Kafin jima'i balagagge, bambance-bambance zai yiwu ne kawai ga kwararru.

Sake bugun

Sterlets sun haɗe a cikin ruwa mara zurfi akan tsakuwa. Don yin wannan, suna matsawa zuwa sama zuwa ƙwanƙolin ƙaƙƙarfan magudanar ruwa. Ƙwai masu ɗaure suna manne da duwatsu a cikin ruwa mai gudana. Bayan ƙyanƙyashe, rafin ruwa yana korar ƙananan kifin zuwa cikin ruwa mai wadatar abinci.

Rayuwar rai

Har zuwa shekaru 20 a cikin kyakkyawan yanayin gidaje.

Gaskiya mai ban sha'awa

Gina Jiki

A cikin daji, sterlets suna ciyar da abincin dabbobi, kamar:

• Kwari tsutsa
• tsutsotsi
• Dodunan kodi
• Shellfish
• kananan kifi (wani lokaci)
• yanzu kuma sai ‘yan busassun narke
• Naman mussel (ba tare da gishiri ba!)
• Kogin ƙuma shrimp
• Sturgeon abinci pellets

Brook fleas ainihin magani ne kuma ana iya amfani dashi don horar da kifin.

Sturgeon yana ciyar da pellets, kamar abinci na halitta, suna da wadatar furotin (50-60% ɗanyen furotin) kuma suna ɗauke da mai mai yawa na ruwa (har zuwa 20%).

• Yana da mahimmanci a sami yawancin kifaye a cikin busassun abinci, wanda ke ƙara yawan makamashi na rashi kuma ya ƙunshi yawancin fatty acids. Wannan ya shafi duka ciyarwar nutsewa da abincin ninkaya.
• Matasa sterlets musamman suna son yin iyo baya a saman ruwa kuma, bayan sun saba da su, ɗaukar abincin kifi kai tsaye daga mai gadi. Musamman tare da wannan girman kifin, yana da mahimmanci don tabbatar da isasshen abinci.
• Wajibi ne a ciyar da abincin sturgeon mai dacewa a cikin abubuwan da aka ambata a sama, in ba haka ba, akwai haɗarin rashin abinci mai gina jiki, rashi bitamin, da yunwa. Don isasshen abinci mai gina jiki, yakamata a ciyar da 1% na nauyin rayuwa na sterlets.
• Saboda yawan kitse da ke cikinsa, ba za a iya adana abincin sturgeon na dogon lokaci ba, da sauri ya zama rancid sannan kuma yana da haɗari ga kifi. Ƙananan kwantena waɗanda ya kamata a adana su a wuri mai sanyi da duhu sun fi kariya daga lalacewa fiye da manyan. Bayan buɗe kunshin, yakamata a ciyar da abincin a cikin watanni 3. Ya kamata a zubar da tsofaffin rukunin abinci.

Girman rukuni

Sterlets ne masu zaman kansu don haka kuma suna jin dadi su kadai a cikin tafki.

Girman tafki da sigogin ruwa da ake buƙata

Kula da ma'auni masu zuwa don kiwo da suka dace da nau'in:

• Sterlets suna buƙatar sarari mai yawa kyauta. A ajiye sterlet a cikin tafki mai karfin lita 5,000 ko fiye. Daga lita 20,000, kwafi biyu ko uku kuma suna jin daɗi.
• Babu zaren algae, duwatsu, ko tushen da zai iya fitowa cikin tafki; domin sturgeons ba su iya iyo baya. Idan aka kama su, za su shaƙa saboda aikin ninkaya yana taimaka musu numfashi.
• Kyakkyawan tsarin tacewa dole ne ya tabbatar da tsabtataccen ruwa mai tsabta tare da ingantaccen ruwa mai kyau. Ana la'akari da yawan buƙatar iskar oxygen ta kifin ta hanyar yawan wurare dabam dabam da ƙarin samun iska.
• Matsakaicin iskar oxygen da aka narkar da a cikin ruwa ba dole ba ne ya faɗi ƙasa da 5 mg / l.
• Garanti a yanayin zafi sama da 15 ° C, yawan iskar oxygen sama da 6 mg / l.
• Tabbatar ingancin ruwa yana da kyau. Mafi kyawun kewayon pH shine tsakanin 6.5 da 7.2. Guji haɓakar algae mai ƙarfi, saboda yana haifar da ƙimar pH mai girma sama da 8. Ma'aunin ammonium da nitrite kada su wuce 0.1 mg / l, dangane da ƙimar pH.
• Bincika matakan nitrate akai-akai. Kodayake waɗannan ba su da haɗari, babban taro sama da 100 MG / l gabaɗaya alama ce ta tsohon ruwa wanda ke cike da samfuran lalata. Sturgeons ba za su iya jure wa wannan ruwa har abada ba.

Zamantakewa da sauran kifin kandami

Tun da kifin suna da cikakken kwanciyar hankali, ana iya haɗa su cikin sauƙi tare da Koi, alal misali. Kananan kifaye, irin su matasa kifin zinare, na iya, duk da haka, manyan sturgeons za su ci. Ya kamata kuma a lura cewa sterlets ba su da niyya sosai idan ana batun cin abinci kuma babban koi yana iya tura su cikin sauƙi daga abincin. Akwai haɗarin cewa sturgeons a cikin babban rukunin Koi ba za su sami isasshen abinci ba. Don haka, a kula musamman lokacin da sturgeons ke cin abinci.