Rotan – kifishigo da shi daga Gabas. A cikin tafkunan ruwan Rasha, mai nuna girman kai, ba tare da nuna bambanci ba a cikin abinci kuma ba ya son yanayin mazaunin, maigidan ya sami wasu 'yan gasa. Sabili da haka, mamayar gidajen ruwa na gida ta hanyar juyawa ta fara.
Wannan fadada ba sharri ne kawai ga yanayin kasa ba, amma kuma bai dace da masunta ba. Dangane da dandano rotan weedy, ba shi da daraja. Ba ma da ƙarancin so a dunƙule da abin kamawa lokacin da ka ji ƙamshi da ƙamshi mara ƙamshi a hannuwanka. Duk jikin kifin yalwace dashi.
Bayani da siffofin rotan
Gwarzo na labarin na cikin damuwa. Daga cikin su, akwai suborder na nau'in goby, wanda shine keɓaɓɓen gidan rajista. A waje, rotan da gaske yana kama da goby a teku fiye da ɓoye. Babban kai tare da babban baki yana ɗaukar kusan sulusi na tsayin jiki.
Idan ka duba hoto, rotan ya bayyana da kyan gani da ƙofar baya, ƙarancin filako. Wannan ya sake canza hankali zuwa kan dabba. Jikin kifin sannu a hankali yana tausa zuwa wutsiya, yana kama da wani nau'i na kayan haɗi.
Ana iya ganin layuka masu kaifin hakora a cikin bakin rotan. Tare da su, kifin ya yi cizo cikin ganima mafi muni fiye da ruff. Hakoran suna sabuntawa lokaci-lokaci. Aukar maƙarƙashiya mai kama da juna bai yi daidai da girmanta ba.
Yawancin juyawa ba safai suke wuce santimita 24 ba. Yawancin lokaci tsawon kifin yana santimita 14-18.
Mamaye ruwan jikin ɓangaren Turai na Rasha ta hanyar ruɓaɓɓu ya fara a cikin 1912. Sa'annan aka saki kifin mai cin abinci a cikin tabkunan St. Petersburg. Masana ruwa sun yi hakan. Ta hanyar juyin juya halin 1917, rotan ya kasance cikin dukkanin ruwa kusa da Gulf of Finland.
A cikin waɗanne wuraren tafki ake samu
Ruwan kifi rotanna iya rayuwa a cikin dausayi, da kuma cikin rami a gefen hanya, har ma a cikin kududdufin da ke kan hanyar kanta. Halittar da take da kan-kai ta fi kyau a wurin fiye da ruwa mai gudu.
Na farko, tsayayyun jikin ruwa suna da zazzabi mafi girma, kuma masu juyawa suna son dumi. Abu na biyu, jarumin labarin ba shi da abokan hamayya a fadama da kududdufai. A cikin koguna, duk da haka, akwai manyan masu farauta waɗanda suke shirye don cin riba daga rotan. Saboda haka, ruwan da ke gudana yana fifita manyan nau'ikan halittar katako wadanda zasu iya jure harin wasu maharan.
Da farko, rotan ya rayu a cikin ruwan Amur na kasar Sin. Tun da kogin ma yana gudana ta cikin ƙasashen Rasha, kifin ya shiga cikinsu. Sannan rotan ya shiga Tafkin Baikal. Daga can ne aka kawo jarumin labarin zuwa St.
A nan ma, rashin dacewar dabba ya taka rawa. Ba kowane kifi bane zai iya jure irin wannan doguwar tafiya; a farkon karni na 20, saurin motsi a fadin kasar da ababan hawa sun banbanta.
Ana daukar Rotana a matsayin kwandon shara
Ponds rotan yana son duhu, silty. Kifin ya rayu inda har ma da maɓallin wuce gona da iri ya mutu. Mutane suna cewa rotan yana rayuwa duk inda aka sake shi. Bayan tafkuna na St. Petersburg, a hanya, an sake gwarzo labarin a cikin Moscow. Wannan kuma hannun hannayen ruwa ne.
Sun kawo kananan kifi marassa kyau don sayarwa zuwa kasuwar tsuntsaye a babban birni. Yin sayayya ta hanzari, Muscovites galibi sukan saki dabbobinsu. Rotans sun kashe dinari. Saboda haka, ƙwace kifin daga hannun masu siyarwa, da yawa daga baya kawai suka fahimci cewa basa son kulawa da dabbar.
Yanayin ya zama ruwan dare musamman ga yara waɗanda ke roƙon dabbar dabba, amma ba a shirye suke su ɗauki nauyin ta ba.
Idan akwai toka a cikin tafkin, rotan da aka saki zai rayu. Kasancewa cikin gaci mai danko, kifin yayi nasarar wanzuwa a kusan rafuka masu daskarewa da tafkuna. Gwarzo na labarin kuma ya tsira a cikin jikin ruwa waɗanda ke bushewa a lokacin lokacin bazara. Ya adana duka iri ɗaya. Bayan an binne shi, kifin yana samun adadin danshi da iskar oxygen.
Jinsi na Rotan
Nau'in rotan da aka kawo Rasha ana kiran sa da wuta. Koyaya, akwai wasu madadin sunaye: sandpiper, zakara, zelenchak, goby, ciyawa, ƙirƙira. Maƙeri, maƙogwaro da goge ma suna cikin jerin. Jerin sunaye masu yawa suna haɗuwa da saurin yaduwar kifin da ba a sani ba har zuwa yanzu.
Kama shi a yankuna daban-daban, kuma an kira shi daban. A zahiri, iri ɗaya na rotan yana ɓoye a bayan duk sunaye.
Kan yana da launin ruwan kasa. Launi ya bambanta dangane da tafki. A cikin ruwa mai tsabta, ruɓaɓɓe sun fi sauƙi, kuma a cikin ruwa mai datti da laka sun fi duhu. Tsayawa zuwa ƙasa, kifin ya sake kamanni, yana zaɓar launi mafi kusa da yanayin.
A cikin hoton akwai baƙin rattan
Akwai, alal misali, launin ruwan toka-kore. Waɗannan ba su ganuwa a bayan ƙangin fadama. Har ila yau, akwai launin ruwan kasa masu datti, har ma da kusan baƙar fata.
Kan kuwa kifi ne mai dauke da tukunya. Da alama dai cikin dabbar yana gab da fashewa. Masu gwagwarmaya don ci gaban asalin asali na wannan gwarzo na labarin da fata. Rotan an ayyana shi a matsayin cuta mai lahani wanda ke lalata mazaunan ɗiban ruwa.
Firebrands sun fara ganima tuni a tsawon santimita na jiki. Menene kifin rotan yake ci? Gwarzo na labarin ya lalata lalacewar adadin wasu nau'in, ba cin su da yawa ba, kamar lalata ƙwai wani. Wannan abu ne mai sauƙi, mai daɗi kuma mai matsakaiciyar ganima don ƙaramin rotan.
Mai lalata Rotan, yana lalata ƙwai na kifin kasuwanci
Fadada rotan a cikin ruwayen ɓangaren Turai na Rasha yana da fa'ida. Kifi na iya zama da fa'ida idan har wasu nau'in halittu suka mamaye ruwan. Misali, akwai Crucians da yawa a cikin kududdufin. Babu isasshen abinci ga kowa. A sakamakon haka, kifayen Crucian ya zama ƙarami, ba zai iya samun matsakaicin adadin ba.
Cin soyayyen kifin da aka toya, wutar wuta tana sarrafa lambobin su. Akwai isasshen abinci don rage yawan jama'a, irin kifin da ake kira Crucian yana ƙara nauyi a cikin tafki.
Wasu nau'in Amur guda biyu masu bacci suna rayuwa a wajen Rasha. Suna zaune cikin koguna da tabkuna na Asiya, waɗanda suka fi itace girma. In ba haka ba, bambance-bambance tsakanin jinsunan ba su da muhimmanci, an bayyana su a launi da girman fincin.
Kama rotan
Babu kasuwancin katako. Naman kifi bai kai matakin shago ba. Amma, a asirce, an kama gwarzon labarin. Cizon Rotan kawai don nama. Lard, soya, tsutsar ciki ana amfani dasu azaman koto.
Kuna iya kifi a cikin Volga, Dnieper, Irtysh, Ob, Urals, Danube, Dniester da Dnieper. A yankin gabashin kasar, wutar gobara tana zaune kusan dukkan koguna da ke kusa da tabkuna da fadama. Rotan yana zuwa daga tafki ne zuwa cikin tafki ba kawai ta hanyar kuskuren ɗan adam ba, har ma yayin ambaliyar ruwa.
A cikin kududdufi marasa dumi da dumi, wanda wuta ta fi so musamman, kamun kifi yana da rikitarwa ta ciyayi. Yawancin lokaci akwai flora mai yawa a cikin irin wannan tafkunan kuma sama da su. Magancewa yana daskarewa cikin algae, snags, rassa da kuma tushen bishiyoyi.
Kamawa da wuta a karon farko, mutane da yawa suna mamaki kifi na cin abinci ko a'a... Waɗanda suka riga sun gwada shi sun tabbatar da cewa za ku iya ci. Farin naman fitilar wuta mai laushi ne kuma mai laushi, amma yana jin ƙanshin laka da ƙashi.
Ainihin, ana soyayyen rotan a cikin yayyafa gari, kamar kifin kifi. Bayan da aka zuba a cikin kwanon frying kuma ya sha kayan ƙanshi, gwarzo na labarin ya ci abinci da farin ciki. Wani lokaci, ana sanya naman rotan a cikin miyar kifin daga nau'ikan kifaye daban-daban.
Lokacin gabatar da wuta a cikin menu, da yawa suna da sha'awar fa'idodi da cutarwar rotan kifi... Naman ta yana dauke da bitamin PP. Niacin ne, wanda ke shiga cikin hada enzyme, maganin kiba na lipid da kuma aikin gyara jiki a jiki. Yana da wadatar rotan da microelements kamar zinc, sulfur, fluorine, molybdenum, chromium.
Kamar sauran kifi, jarumin labarin yana tara abubuwanda suka fi ƙarfin cikin tafkin. Saboda haka, amfanin kifi sharadi ne. Mutanen da aka kama daga gurɓataccen ruwa basu da matsala sosai ga ingantaccen abinci.
Sake haifuwa da tsawon rai
Ana kiran rotans na Rasha rajistan ayyukan ba kawai saboda girman kai ba. Yana taka rawa da ma'amala tare da garwashin wuta. Yayin lokacin kiwo, rubutattun rubuce rubuce da kuma launin ruwan kasa daga jinsunan ana rufe su da lemu mai launin ruwan lemo. Tare da su, tsananin kifin ya zama kamar wuta mai ci.
Rotans suna kiwo a ƙarshen bazara - farkon bazara. Ruwan ya kamata ya dumama zuwa digiri 17-20. Wasannin mating na wutan gobara na tsawan kwanaki. Eggswai na kifi suna yin farfaɗo, suna gyara gamsai mai gamsarwa akan abubuwa masu iyo ko duwatsu na ƙasa, tsutsa. Mata suna ƙoƙari su sami ɓoyayyen kusurwa. Don haka qwai sun fi saurin zama soya.
Embryos na Rotan suna buƙatar oxygen fiye da kifin baligi. Iyaye dole ne a kullum fan da qwai da fin kadan. Ta hanyar ƙirƙirar wani yanayi, kifayen suna tsara “hanyar” ruwa tare da sabon oxygen.
An sanya alhakin kula da caviar ga maza a cikin wutar wuta. Ba wai kawai su ke rayarda amfrayo bane, amma kuma suna kishin kariya daga masu farauta, suna hanzarin doke su da babbar goshin su.
Rotans suna rayuwa daga shekaru 4 zuwa 7. A cikin akwatinan ruwa, tare da kulawa mai kyau, itacen itace yana da shekaru 9. Koyaya, masanan ruwa na zamani, waɗanda kifin kasashen waje masu haske suka lalata, da kyar suke siyan itace don yardan gani.
