Wannan sturgeon na iya zama fiye da shekaru 100.

Masana ilmin halitta kwanan nan sun kama kuma suka yiwa ɗaya daga cikin mafi girma kuma mafi tsufa kifin ruwan da aka taɓa ganowa a Amurka. Sturgeon mai tsawon mita 2,1 kuma nauyinsa ya kai kilogiram 109, zai iya wuce shekaru 100 da haihuwa. An kama Lake sturgeon (Acipenser fulvesscens) a ranar 22 ga Afrilu a cikin Kogin Detroit a Michigan. Sai da mutane uku suka kwaso, aunawa da yiwa kifin alamar, daga nan aka sake shi a cikin kogin. Jason Fisher, masanin ilmin halitta tare da Alpena Fish and Wildlife Conservation Authority (AFWCO), ya kasa yarda da idanunsa. "Yayin da muka daga shi, sai ya kara girma," in ji shi. "A ƙarshe, wannan kifi ya ninka fiye da wanda aka kama a baya a yankin." Girmansa suna da ban sha'awa da gaske: 2,1 m tsayi da 109 kg a nauyi.

Lake sturgeon yana zaune a cikin tsarin ruwa na gabas na Arewacin Amirka. Mafi yawan lokuta wadannan kifaye suna zama a kasan koguna da tafkuna, inda suke cin kwari, tsutsotsi, katantanwa, crustaceans da sauran kananan kifin da suke kamawa, suna shan ruwa mai yawa da laka. Ana kiran wannan tsotsa. A halin yanzu ana daukar nau'in na cikin hadari a cikin jihohi goma sha tara daga cikin ashirin da aka samu. Har zuwa shekaru ashirin da suka gabata, hannun jari na sturgeon yana raguwa saboda kamun kifi na kasuwanci, wanda tun daga lokacin ake sarrafa shi. An kuma ƙaddamar da ƙayyadaddun iyakokin kama don kamun kifi na nishaɗi. Waɗannan matakan sun ba da 'ya'ya. A cikin 'yan shekarun nan, yawan mutanen sturgeon sun murmure a hankali. Kogin Detroit a halin yanzu yana ɗaukar ɗayan mafi kyawun al'umma a cikin ƙasar, tare da sama da sturgeon tabki 6.500 da aka rubuta. Daga cikin su akwai, watakila, har ma fiye da tsofaffi da samfurori masu ban sha'awa. Duk da haka, har yanzu waɗannan kifaye suna fuskantar wasu barazana kamar gurɓacewar kogi, zubar da ruwa da matakan shawo kan ambaliyar ruwa da ke hana su yin iyo zuwa wuraren da suke haƙowa.