Le sturgeon ingase ibe ngaphezu kweminyaka eyi-100 ubudala.

Izazi zezinto eziphilayo zisanda kuthwebula futhi zamaka enye yezinhlanzi ezinkulu nezindala kakhulu ezake zatholwa e-United States. I-sturgeon, engamamitha angu-2,1 ubude futhi inesisindo esingamakhilogremu angu-109, ingaba ngaphezu kweminyaka eyi-100 ubudala. I-Lake sturgeon (i-Acipenser fulvescens) yabanjwa ngo-Ephreli 22 emfuleni iDetroit eMichigan. Kuthathe abantu abathathu ukukhipha, ukukala kanye nokumaka inhlanzi, eyabe isidedelwa yabuyela emfuleni. U-Jason Fisher, isazi sezinto eziphilayo ne-Alpena Fish and Wildlife Conservation Authority (AFWCO), akakholwanga amehlo akhe. “Njengoba siyiphakamisa, yaya ngokuya iba nkulu,” esho. “Ekugcineni, le nhlanzi ibingaphezu kokuphindwe kabili kunanoma iyiphi eyake yabanjwa endaweni.” Ubukhulu bayo buhlaba umxhwele ngempela: 2,1 m ubude kanye 109 kg ngesisindo.

I-Lake sturgeon ihlala emanzini ahlanzekile ogwini olusempumalanga yeNyakatho Melika. Isikhathi esiningi lezi zinhlanzi zisichitha ngaphansi kwemifula namachibi, lapho zidla khona izinambuzane, izikelemu, iminenke, ama-crustaceans nezinye izinhlanzi ezincane ezizibambayo, zimunca amanzi amaningi kanye nenhlabathi. Lokhu kubizwa ngokuthi ukuncela. Lolu hlobo okwamanje lubhekwa njengengozini ezifundazweni eziyishumi nesishiyagalolunye kwezingamashumi amabili lapho lutholakala khona. Kuze kube yiminyaka engamashumi amabili edlule, amasheya e-sturgeon ayencipha ngenxa yokudoba ngenjongo yokuthengisa, osekulokhu kulawulwa. Imikhawulo eqinile yokudotshwa kwezinhlanzi nayo yethuliwe ezindaweni zokuzijabulisa. Lezi zinyathelo ziye zathela izithelo. Eminyakeni yamuva nje, inani lama-sturgeon liye lalulama kancane kancane. Umfula iDetroit njengamanje uphethe esinye sezakhamuzi ezinempilo kunazo zonke ezweni, ne-sturgeon yechibi ebhalisiwe engaphezu kuka-6.500. Phakathi kwabo kukhona, mhlawumbe, izibonelo zasendulo nakakhulu futhi ezihlaba umxhwele. Kodwa-ke, lezi zinhlanzi zisabhekene nezinye izinsongo ezinjengokungcoliswa kwemifula, amadamu kanye nezinyathelo zokulawula izikhukhula ezithiya ikhono lazo lokubhukuda zikhuphukele phezulu lapho zizalela khona.