Izinduna: intlanzi kunye mangaza

sisinkantazi yaseYurophu - enye owawungekhe iintlanzi ukuba afumaneka kuphela emhlabeni. Kubomi bakhe bonke, ukuba ayaguquka ezininzi kangaka esimangalisayo kwaye soyise umgama kangangokuba uqulukubhode zabo kuyamangalisa. Ungaqala nesibakala sokuba eels - iintlanzi ezihlala emanzini ahlaziyekileyo, kodwa zikhula olwandle.

Ehlabathini jikelele baye ngomkhombe oku kuLwandle Sargasso. lwamaJuda nje ezidla ocean enamandla ngoku uthwala ukuya elunxwemeni Europe. uhambo emangalisayo olude kunye yingozi sihlala iminyaka emithathu.

Nje kufuphi nonxweme Eurasia ugorki ekugqibeleni ukufikelela iisentimitha ezisixhenxe ukuya kwezisibhozo elide, kodwa kwalo indlela enzima. Nantoni na nithi, kodwa eels - iintlanzi engawevayo kakhulu kwaye ziyafana kwindawo zabo.

Xa sifika emlanjeni, baza ngokuthe ngcembe wamvusa kubo iindawo ababehlala apho abazali babo. Apha, baphila iminyaka 25, uze uphinde indlela ookhokho babo kuLwandle Sargasso. Ukuze yoyiswe le ndlela inzima kwaye obufihlakeleyo, kwaye amaxesha amaninzi kwanyanzeleka ukuba ukukhasa phakathi imilambo ukuya amashumi yeekhilomitha!

Kwaye konke oku - ngenxa yendlela km ngamawaka asixhenxe, amaqanda, emva koko ukuba baseza kufa ... Ngamafutshane, izinduna - iintlanzi ezifanayo kakhulu ngokuphathelele oku salmon, kodwa nokufuduka wabo uhamba vice versa.

Hi ndlela leyi, va ni xinakulobye lexikulu swinene inyama emnandi aziswa ukususela mandulo ngoko. Okunye nasekuthwaseni kwenyanga, nangamaxesha omkhulu Aleksandra Makedonskogo kubonelelwa iindwendwe zakhe kakhulu uyazukiswa. Nokuba ke, izazinzulu akazange phumzani omnye umbuzo: "njani ezi ntlanzi uhlobo, ukuba akukho namnye kubo owake kufunyenwe akukho amaqanda okanye ubisi"?

Ke Aristotle ucingela ukuba eels - iintlanzi avela eludakeni yonxweme!

Isimanga, kodwa iingcamango njengomntwana onengqondo enkulu yaba imfundiso ... phezu zeminyaka emibini. Kwaba kuphela ngo-1694, enkulu semvelo Italian kunye semvelo Francesco Redi wabeka phambili Inkolelo echanekileyo.

Wachitha iminyaka emininzi ebuka eels. Redi ibalandela waza wafumanisa ukuba ezi zidalwa ezimangalisayo ungene upakisha ukudada phantsi imilambo ukuya yolwandle. Esebenzayo: zonke sisinkantazi intlanzi (apho kufunyenwe inani elikhulu) amaxesha shwaka kwezinye iindawo, kodwa ukuhla nokunyuka kwamanani, akukho bani na ingqalelo.

Kakade ke, bambalwa bakholwa kuye. Ngapha koko, le semvelo akazange ukunika ubungqina obaneleyo!

Isiqinisekiso ngqo ye hypothesis ngenkalipho yaba amava katstsa, omnye umphengululi Italian kunye linene. Emva kweminyaka phantse ama-200 emva kokuba theory Redi, yena wayeloba kwi-Gulf of Messina iintlanzi engaqhelekanga kakhulu, nto leyo kwada ngoko akukho mntu esichazwe.

"A uhlobo olutsha" yathiywa Leptocephalus. Ngowe-1897, isibini iintlanzi zibekwe kwitanki intlanzi amlinda. Emva konyaka elindele bebone into eyothusayo: i leptotsefalov umzimba sentimitha asisifutshane ezilahlekileyo vulgaris ezithile amaqhakuva amagqabi-ezimilise, abe!

Nangona kunjalo, akukho nje iintlobo amanzi. Ngokukodwa, iintlanzi zolwandle sisinkantazi Europe. Ekhula ukuya ubude beemitha ezintathu kwaye ukufikelela ezinobunzima 120 kilograms!

Hi ndlela leyi, andisa ezi zilwanyana nangoku ayaziwa ncam. Yinto eyaziwayo ukuba ukuze zidala eels ukwehlela anzongonzongo kakhulu. yokuzalela - Gibraltar. Kodwa akukho iinkcukacha malunga nendawo ekuza caviar buttonhole, kwaye inkqubo nangoku mntu uchazwe.