Uswa kabhu: hove-Cleaner

In mvura nyika yedu, pane hove wezvokutengeserana dzakawanda uye hove dziri dzinonetsa kwoupfumi kukosha. Zvapedzisira zvinoshandawo kabhu. hove iyi inoita basa rinokosha iri kudzivirira zvirwere izvo chinopfuudzwa kubudikidza transmissible (apo mosquito ikaruma) mu kutonhora zvenyukireya turbines nemamwe maitiro.

Sei zvakadaro? Ngationei pamusoro ichi zvinoshamisa ugere nzizi Russian zvikuru. Zviri musha East Asia, apo zviri kwakapararira muna Amur River uye nzizi yose China uye Nyika dzakapoteredza. Zvinofanira kucherechedzwa kuti munyika yedu, haana kusangana kusvikira 60-ies wekupedzisira remakore, apo vakawanda consignment hove akaendeswa Soviet Union nechinangwa acclimatization én yavo.

Kusiyana uku haisi yokuti vabudirire acclimatization én, sezvo mienzaniso yakafanana anogona kuwanikwa wandei, asi pakuti mufambiro cheki-kabhu kwete chete haitungamiriri chisingadiwi zvezvakatipoteredza yakaipa (izvo zvakaitika kakawanda), asiwo kune undoubted tibatsirwe. Pashure pezvose, kabhu - hove chinokosha kwete chete kubva zvebhizimisi nemaonero (uye aine uremu kusvika makirogiramu 35, zviri pachena), asiwo kubva nemaonero vemabhizimisi, nekuti rimwe zuva rino "Freshwater mhou" anodya uswa zvakawanda iye anoyera! Zvikurukuru, vagari vemisha romumhenderekedzo yegungwa muchirimo uye matsutso vanopiwa vavakidzani vavo vanoshanda, vachikanda mumvura uswa kuchekwa.

neshungu pakudya zvinomera hwemvura vaisagona kuziva simba engineering, izvo kare nechinetso kuti siltation madziva-No uye overgrowing navo guru yakawanda tsvina mvura. Kunyanya pachinhu ichi, icho annoys elodea, madota kuti "pamutemo" nzira anenge hazviiti. Asi kabhu hove Elodie aida uye zvachose rwakapedza dambudziko, zvikuru kune varambe vachifara dzezvakatipoteredza: nayo nokurusima nguva yake yakanga yabva Canada, uye ndizvo chaizvo chete, "pamutemo".

Zvinofanira kusimbiswa kuti mumiririri uyu Freshwater fauna of mumvura edu regai kuita kuti pave, saka kuti kwerunyararo vagari vemo zvachose mutoro zvikuru zvakagadzirirwa hove mapurazi, izvo pagore anogadzirwa madziva yedu nyika zviuru kabhu furaya uye mazana. Nenzira, zvinoita sokunge hove zvinoshamisa izvi?

Sezvatakamboreva, uswa kabhu, pikicha izvo unogona kuona munyaya ino, iri hove huru, wakareba zvingabudirira kusvika 120 masendimita. Ichazivikanwa noku elongated, flattened laterally muviri, iyo yakafukidzwa huru pachikero. On kwayo saizi inoti kanenge chokwadi kuti zvose lateral mutsetse rehove hatina zvinopfuura 50 pachikero.

Kana waronga kushanyira dziva, apo zvatinosiita kabhu (hove, nenzira, rinonaka) nechinangwa hove, yeuka kuti kuita izvi chero nguva hakushandi. Chokwadi chokuti kabhu vari chaizvo picky kudya uye asingatori kunyange kuedza zvikuru hunoshandiswa semazuva dura pane uswa hwemvura. Nemamwe mashoko, hove vanofanira kuva mangwanani chitubu uye mukupera kwematsutso, kana kuti zvadzinofura anova vakaipa. Hove iyi chenjera, saka kuti kana rwendo hove zvakasimba tinoratidza kuti murege kuita ruzha.

Saka takadzidza kuti ndiani uswa ichi kabhu: hove, pasina iro nzizi dzakawanda munyika yedu akakoniwa vashoma chaizvo uswa.