Video: Lub hiav txwv lamprey puas kis tau li cas?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Hiav txwv lampreys tau hla Great Lakes thaum ntxov xyoo pua 20th los ntawm kev xa cov kwj dej. Hauv lawv thaj tsam ib puag ncig, taws teeb nyob ib feem ntawm lawv lub neej hauv dej ntsev, tab sis lawv tau yoog kom ua neej nyob hauv cov dej ntshiab hauv Great Lakes. Raws li cov neeg laus lawv yug hauv dej thiab ntws.
Hauv txoj kev no, dab tsi ua rau lub hiav txwv lamprey cuam tshuam?
Cov pejxeem tsim los ntawm hiav txwv lamprey tau muaj kev puas tsuaj loj rau lub xeev cov nuv ntses. Txhais Kev Taw Qhia: Nws yog sib cav seb hiav txwv lamprey yog haiv neeg nyob rau Lake Ontario. Txawm li cas los xij, hom tsiaj tsis yog ib txwm nyob rau lwm qhov Great Lakes thiab tau qhia rau Lake Erie dhau ntawm Welland Canal.
Ib tus kuj tseem yuav nug tau tias, lub hiav txwv lamprey kis tau li cas? Keeb kwm thiab Spread Sea lampreys yog haiv neeg ntawm Atlantic Dej hiav txwv , Lake Ontario thiab St. Lawrence River. Lawv kis mus mus rau lwm qhov Great Lakes ntawm cov kwj dej uas hla dhau cov teeb meem ntuj. Lawv yog tau lees paub hauv Lake Erie xyoo 1921, Lake Michigan xyoo 1936, Lake Huron xyoo 1937, thiab Lake Superior xyoo 1938.
Tib neeg tseem nug, cov teeb ci dej hiav txwv ua teeb meem li cas?
Hiav txwv lampreys yog cov kab mob parasitic. Lawv txuas rau ntses nrog lawv lub qhov ncauj nqus thiab cov hniav, thiab siv lawv tus nplaig txhawm rau hla ntses ntses thiab tawv nqaij kom lawv tuaj yeem noj nws cov ntshav thiab lub cev. Ib leeg xwb hiav txwv lamprey yuav rhuav tshem txog 40 lbs.
Peb yuav ua li cas nres lub hiav txwv lamprey tsis kis?
Thawj txoj hauv kev los tswj hiav txwv lampreys yog daim ntawv thov ntawm lampricide TFM rau lub hom phiaj hiav txwv lamprey larvae hauv lawv cov chaw zov me nyuam. Hauv qhov kev siv ntau, TFM tua cov kab menyuam ua ntej lawv tsim lub qhov ncauj ua rau tuag thiab tsiv mus rau lub pas dej kom pub ntses, thaum feem ntau lwm yam kab mob tsis muaj kev cuam tshuam los ntawm TFM.
Pom zoo:
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