Abuur nooc ka sii adag weedhan Tan iyo 1970-yadii, heerka isku-dhafka ee u dhexeeya pale iyo shovelnose ayaa kor u kacay.
Dabcan, nooc ka sii adag jumlada ayaa ah "Tan iyo 1970-yadii, heerarka isku-dhafka ee u dhexeeya caddaanka iyo shovelnose ayaa kordhay tanina waxaa loo aaneeyaa isbeddelada Wabiyada Mississippi iyo Missouri, oo ku qasbaya caddaanka caddaanka ah meelaha ay fursad weyn u leeyihiin inay la kulmaan shovelnose sturgeons. "