Abrau sprat - ndi mwa nsomba?

Abrau sprat - kodi nsomba? Kodi moyo ndi chiyani kudya? Mukufuna kupeza mayankho a mafunso amenewa? Kenako werengani nkhani zina.

mafotokozedwe

Abrau sprat - sing'anga-kakulidwe nsomba amakhala ku madzi, banja la herrings. Thupi ukufika masentimita naini m'litali. Kulemera kwa nsomba imodzi - magalamu khumi. Amakhala abrau sprat osaposa zaka ziwiri. Izo wakudya zooplankton yaing'ono.

kubalana

Pa zaka chaka chimodzi ukufika msinkhu. Thupi pa nthawi ino ndi atatu kapena asanu masentimita. Spawning kumayambira May zimatha mpaka October. Childs, izi zimachitika pambuyo madzulo usiku. Madzi kutentha kwa kubalana yabwino madigiri osachepera makumi awiri.

Kamodzi abrau sprat, zithunzi zomwe mungathe kuwona kuchokera mu nkhani iyi, akhoza kubweretsa pa makumi atatu mazira pelagic. chitukuko ndi kudya mayendedwe. Kuyambira nthawi kusasitsa wa mazira aswa mwachangu pochitika osati oposa khumi maola. Kenako kumira pansi paokha. The zigawo madzi a pamwamba aukitsidwa kokha pamene iwo kupasuka kwa yolk sac. Wamkulu abrau sprat wakudya nkhanu. nsomba Young kudya copepods, rotifers, mbewu zamoyo ndi mazira.

malo

Kawirikawiri mtundu wa nsomba zimapezeka akachita nyanja Abrau, yomwe ili pafupi ndi mzinda wa Novorossiysk, Krasnodar Krai. Abrau sprat mu nineties nthawi zambiri spawning ndi kubweretsa ana ambiri. Koma izi zonse zinasintha ndi kusintha kwa nyengo, komanso mkubwela kwa Nyanja ya mitundu ina nsomba. Recent kubweretsa abrau sprat kusapeza, chifukwa imfa ya ana, ndipo anthu ali kuchepekela zikuchepa.

subspecies wina

Mu Turkey, asayansi apeza pafupifupi mawonekedwe a nsomba subspecies monga sprat abraulskaya. View chikhalidwe pelagic. Nthawi zambiri padziko la nyanja. Izo zimapangitsa kusamuka kwa malo olungama, kawirikawiri ndi zomera ndi. Masana abraulskaya sprat akhoza kusiya mwakuya nyanja, usiku M'malo mwake, limatuluka pamwamba pa madzi.

Chifukwa chepetse chiwerengero?

Mpaka mapeto a magulu a mtundu wa nsomba hering'i ankaona chachikulu. Pamene nsomba mu trawl ukonde anagwa zidutswa mazana awiri. Pambuyo nineties cha m'ma 20 chiwerengero utachepa chifukwa cha zikamera wa nsomba zolusa mu nyanza. Ndipo kamodzi anaika mu malo nsomba, anthu sprat ndi chiyani anagwa ambiri nthawi.

Kodi chikuchitika ndi mtundu uwu wa sprat?

Pa nthawi, nyanja sizikutetezedwa ndi si m'dera motetezera. Njira kutetezela sprat sadzailandira. Posacedwapa izo zakonzedwa kuchita kafukufuku yotakata Abrau madzi m'nyanja. Ngati, pa kafukufuku chowululidwa pamaso pa sprat, izo kuwunika kukula kwa subspecies ichi ndi kuchititsa kuvomerezedwa cryopreservation matupi athu.

nambala ya miyeso kubwezeretsa

Panthawi pulogalamu ndi akupangidwa monga kuphunzira Integrated ndi kubwezeretsa anthu sprat. Pakuti ichi m'pofunika chongopeka kubereka maganizo acclimate mu madzi kapena mosungiramo.

Kutentha madzi ayenera zikugwirizana limodzi mu Nyanja Abrau.

Pofuna kuoneka sprat, muyenera kuchepetsa chiwerengero cha nsomba zolusa. Choyamba, ndi nsomba.

Opha nyama imathandizanso zofunika kwambiri pa moyo ndi kubalana wa nsomba. Ndipotu, kwa iye kuphika zosiyanasiyana mbale ndi mitundu yonse ya zokhwasula-khwasula.

Today zinatha abrau sprat. The Red Book la Chitaganya cha Russia kale m'gulu mu chiwerengero cha mitundu zina nsomba, amene ali ndi sprat.
Zichitike opaleshoni kubwezeretsa hering'i nsomba za mtundu zimenezi kungathandize kusunga iwo.

Pomaliza

Tsopano inu mukudziwa yemwe uyu abrau sprat. Chithunzi zolinga fanizo amene timapemphera nkhaniyi. Tikukhulupirira kuti mudziwe adzakhala zothandiza inu.