Ziyini izinhlanzi ezithakazelisayo ze-ratan?

Kuze kube manje, emithanjeni yamanzi ase-suburban yabaningi abadobi be-CIS babamba izidalwa ezincane kodwa eziyinqaba. Lezi yizinhlanzi ze-ratan, ezihlukile ekubukeni nokuzijwayeza kakhulu.

Cishe uyazi ukuthi i-swallows ihlaselwa kanjani ngokujulile? Sifisa ukukuqinisekisa ukuthi umlutha owenza umbuzo wenza kube ngcono nakakhulu. Kwabaqalayo, inqubo yokukhululwa kwayo iyabangela ukwesaba nokwesaba: inhlanzi encane (kusuka ku-14 kuya kwezingu-25 cm ubukhulu) ibonakala ngesikhumbuzo esikhulu nesinamahloni esibukeka njengomlingisi wefilimu edidayo!

Abadobi abanokuhlangenwe nakho, ukuthungatha ama-slime ezinamathele ezandleni zabo, futhi bahlale beyiqiniso elidabukisayo lokubamba "lo mbhalo". Ngelinye igama, izinhlanzi ziyi-ratans - okwamanje iyisisulu!

Isayensi encane ehlanzekile: ngesiLatini le nhlanzi ibizwa ngokuthi i-Perccottus glenni, iyingxenye yeqembu le-perciformes futhi ifakwe engxenyeni ye-bullheads, ethathwa emndenini ohlukile - ikhanda. Yebo, naphezu kobuhlobo babo ne-perch, izinhlanzi zaseRatan zahlukaniswa. Futhi kungaba kanjani okuhlukile: izihlobo zezilwane ezivame kakhulu emanzini ethu zibukeka njengezilwane zasolwandle ...

Uma ubheke i-rotana eduze, uzoqonda kalula ukuthi kungani ibizwa ngokuthi "i-bullet". Umbala akuyona ngengozi - lezi zinhlanzi zihlala emzimbeni wamanzi amnyama, anodaka, lapho ngisho ne-carp eqinile engahambisani nayo.

Noma kunjalo, konke kuxhomeke lapha kokubili ngesikhathi nendawo yokuthunjwa. Uma echibini likhulu ngokwanele futhi lihlanzekile, izinhlanzi ze-rattle zivame ukukhanya. Ngaphezu kwalokho, lezi zinhlobonhlobo azigcini nje kuphela, kodwa cishe ziphenduka indlela yokuphila eyingozi, ngezinye izikhathi zibhubhise ngokuphelele ezinye izinhlobo zezihlobo zazo.

Njengoba ubambe isibhamu sesilisa phakathi nenkathi yokuvuna, uzobona ukuthi wonke ubuso bomzimba wakhe ugcwele izindawo ezikhanyayo ze-orange. Ukufana nokubhema okukhwehlelayo akunakuphikwa ngokuphelele!

I-Rotan ivela eMpumalanga Ekude, isebenza njengenye isibonelo se-encyclopedic ye-acclimatization ephumelelayo nobuwula bomuntu. Njengoba eseyiyona yedwa yamachibi namachibi, wayevame ukuhlanganisa izinhlobo eziningi zezinhlanzi eziyigugu.

Ezweni lakubo, lihlala emzimbeni wamanzi amancane futhi afudumele: ku-Amur efanayo kunezimbangi eziningi, futhi ngisho ne-ratan enkulu kakhulu iyodliwa ngaphandle kokulandelwa yizakhamuzi ezinkulu kulawo manzi.

Engxenyeni yaseYurophu yezwe, lezi zinhlobo ezivelele zavela ekuqaleni kwekhulu lama-20. Ukuhamba kwakhe okuphumelelayo kwaqala kusukela emagodini aseSt. Petersburg, lapho ngo-1912 le modeli yakhululwa ngamanzi. Ngisho nangaphambi kweRevolution, i-rotan ngokushesha yaxazulula cishe wonke amachibi eduze neGulf of Finland.

Naphezu kwalokhu, ngaleyo minyaka ukufika enhlokodolobha izinhlanzi azikwazanga. Kodwa kakade ngo-1948, i-rotan enezinyosi yayiswa eMoscow ngamanzi afanayo, ayethengiswa ngamaqoqo amakhulu "enyoni". Ukufudumala kwamadolobhana aseMoscow kwakudingeka alale, ngakho-ke phakathi neminyaka engama-50 itholakala kunoma iyiphi inhlanzi yasendaweni ngisho nasemgodini ongasemgwaqweni.

Ngenhlanhla, emifuleni lezi zinhlobo zikhula kabi: izinga lokushisa kwamanzi elincane lizolahlwa, futhi kukhona abancintisana abaningi. Njengamanje, isatshalaliswa cishe yonke insimu yaseYurophu: ngisho naseCzech Republic, abadobi abazange baqale ukufunga, bezama ukuyizungeza. Eningizimu, i-rotan enezinyosi seyifinyelele ngisho nase-Uzbekistan. Kucatshangwa ukuthi ngasekupheleni kuka-2050 kuzofinyelela ezingeni eliphansi le-Volga.

Izithombe ezinikezwe ukunakwa zizokwenza ukuthi okungenani wenze okunye okuthandwa yizinhlanzi ze-ratan. Hhayi, ukuthi kuyamangalisa yini, sikutshele!