Le sturgeon inokuba ngaphezu kweminyaka eyi-100 ubudala.
Izazi ngebhayoloji kutshanje ziye zabamba zaza zaphawula eyona ntlanzi inkulu kunye neyona indala yakha yafunyanwa eUnited States. Injakazi, eziimitha ezi-2,1 ubude kwaye inobunzima obumalunga neekhilogram ezili-109, inokuba neminyaka engaphezu kwe-100 ubudala. I-Lake sturgeon (i-Acipenser fulvescens) yabanjwa ngo-Aprili 22 kuMlambo waseDetroit eMichigan. Kwathatha abantu abathathu ukubuyisela, ukulinganisa kunye nokuphawula intlanzi, eyathi yakhululwa emva komlambo. UJason Fisher, isazi ngebhayoloji kunye ne-Alpena Fish and Wildlife Conservation Authority (AFWCO), akazange awakholelwe amehlo akhe. Wathi: “Njengoko sasiyiphakamisa, yaya ikhula ngokuba nkulu. “Ekugqibeleni, le ntlanzi ibingaphezulu ngokuphindwe kabini kunayo nayiphi na into ebibanjwe kulo mmandla ngaphambili.” Imilinganiselo yayo iyamangalisa ngokwenene: 2,1 m ubude kunye ne-109 kg ubunzima.
ILake sturgeon ihlala kwiinkqubo zamanzi acocekileyo kunxweme olusempuma kuMntla Merika. Ixesha elininzi ezi ntlanzi zilichitha emazantsi emilambo namachibi, apho zitya izinambuzane, iintshulube, iinkumba, ii<em>crustaceans nezinye iintlanzi ezincinci ezizibambisayo, zifunxa amanzi amaninzi kunye nentlenga. Oku kubizwa ngokuba kukufunxa. Uhlobo lwangoku luthathwa njengolusemngciphekweni kwishumi elinethoba kumazwe angamashumi amabini apho lufumaneka khona. Kuze kube yiminyaka engamashumi amabini edlulileyo, i-sturgeon stocks yayihla ngenxa yokuloba ngokurhweba, esele ilawulwa. Imiqathango engqongqo yokubambisa iye yaziswa kukuloba ngenjongo yokuzonwabisa. La manyathelo abe neziqhamo. Kwiminyaka yakutshanje, inani le-sturgeon liye lachacha ngokuthe ngcembe. UMlambo iDetroit ngoku ubamba elinye labona bantu basempilweni kweli lizwe, ngaphezulu kwe-6.500 yechibi le-sturgeon erekhodiweyo. Phakathi kwabo kukho, mhlawumbi, imizekelo yamandulo kunye neyona nto inomdla. Nangona kunjalo, ezi ntlanzi zisajongene nezinye izoyikiso ezinje ngongcoliseko lwemilambo, amadama kunye namanyathelo olawulo lwezandyondyo ezithintela isakhono sazo sokuqubha zinyusa umsinga ukuya kwiindawo ezizalela kuzo.
