Mary Allen
Kodi nsomba za sturgeon ziyenera kusungidwa m'dziwe la m'mundamo ndipo ndi pazifukwa ziti zomwe zingafotokozedwe kuti ndi "zoyenera zamitundu"? Tikufuna kuthana ndi mafunso awa ndi mafunso ena m'nkhani ino.
Zambiri za Sturgeon
Mbalameyi ndi nsomba ya mafupa, ngakhale kuti mafupa ake ndi ossified theka. Maonekedwe a thupi ndi mayendedwe osambira amawapangitsa kuwoneka ngati akale, kuphatikiza mafupa olimba pamsana pake, ndipo amakhulupirira kale kuti ma sturgeon akhalapo kwa zaka pafupifupi 250 miliyoni. Zonsezi, nsomba za sturgeon sizivulaza, zamtendere, komanso zamphamvu zomwe zimakonda madzi ozizira, odzaza mpweya. Kunja kwakukulu kumasokoneza malo ambiri, kuyambira mitsinje kupita kunyanja - mutha kuwapeza m'malo ambiri.
Chimene onse amafanana ndi luso lawo losambira: Ndi olimbikira kwambiri kusambira ndipo amangoyendayenda, n’chifukwa chake amatenga malo ambiri. Masana nthawi zambiri amakhala pansi, koma makamaka usiku nthawi zina amakhota pamwamba.
Nsomba zina sizowopsa kwa sturgeon, koma ndi vuto lomwe lingawononge moyo wawo: ma sturgeon sangathe kusambira chammbuyo. Ichi ndichifukwa chake ndere za ulusi, mabeseni okhala ndi ngodya, mizu, ndi miyala ikuluikulu ndizovuta kwenikweni kwa nsombazi. Nthaŵi zambiri amalephera kutuluka m’mbali zakufa zimenezi ndi kufota chifukwa chakuti madzi opanda mchere okwanira satuluka m’matumbo awo.
Pali mitundu pafupifupi 30 ya sturgeon padziko lonse lapansi yomwe imasiyana osati mawonekedwe okha komanso kukula kwa thupi: Mitundu yayikulu kwambiri, mwachitsanzo, imatha kukula mpaka 5 m kutalika ndikulemera pafupifupi tani imodzi. Malingaliro olakwika ofala apa ndi akuti zamoyo zonse zimatha kusungidwa m'dziwe chifukwa kukula kwake kumagwirizana ndi kukula kwa dziwe. Nsomba yaikulu yotereyi sichingachepetse kukula kwake kufika masentimita 70 chifukwa dziwe silikukwanira.
Nsomba yomwe ili yoyenera dziwe lanu ndiyomwe imakhala sterlet yeniyeni, yomwe imatha kutalika kwa 100cm. Ikhoza kukhala ndi moyo zaka 20, ndi nsomba yamadzi opanda mchere, ndipo imapezeka makamaka m'mitsinje ndi nyanja zomwe zimakhala ndi mafunde okwera kwambiri. Ili ndi mphuno yowonda, yayitali, yopindika pang’ono ndipo mbali yake ya kumtunda ndi yoderapo yoderapo mpaka imvi, pansi pamphuno yofiirira-yoyera mpaka yachikasu. Mafupa omwe ali pamsana pake ndi oyera oyera.
Dziwe la Real Sterlet
Monga tanenera kale, sterlet ndi yaing'ono kwambiri ya banja la sturgeon ndipo, motero, ndiyoyenera kwambiri kusunga maiwe. Komabe, nthawi zonse muyenera kukumbukira kuti kukhala m'dziwe sikufika kumalo achilengedwe. Simungathe kupanganso mtsinje weniweni. Ngati mwasankha kupanga dziwe labwino kwambiri la sturgeon, chofunika kwambiri ndikukhala ndi malo okwanira osambira kwaulere. Muyenera kupewa zomera za m'madzi ndi miyala ikuluikulu pansi (chifukwa cha nkhani yotsukira kumbuyo) ndipo dziwe liyenera kukhala lozungulira kapena lozungulira. M'dziwe loterolo, mbalame za sturgeon zimatha kuyenda mopanda zopinga. Mfundo ina yowonjezera ndi makoma otsetsereka a dziwe. Apa amasambira m’mbali mwa makoma motero amafika pamwamba pa madzi.
Dongosolo lamphamvu losefera ndilofunikanso, chifukwa ma sturgeon amangomva bwino m'madzi omveka bwino, okhala ndi okosijeni; chisangalalo cha kusambira chikhoza kuthandizidwa ndi mpope wothamanga. Kawirikawiri, dziwe liyenera kukhala lakuya mamita 1.5, koma kuya ndi bwino nthawi zonse: Madzi osachepera 20,000 malita ayenera kukhala ndi mpweya wabwino. Nsomba ikakhutitsidwa ndi kumva bwino m'malo mwake, imatha kukhala yoweta.
Kudyetsa Sturgeon
Mfundo ina yofunika apa ndikudyetsa, popeza sturgeon ili ndi zina zake. Nthawi zambiri, mbalame za sturgeon zimadya mphutsi za tizilombo, mphutsi, ndi molluscs, zomwe zimasesa mkamwa mwawo ndi barbels zawo. Choncho amatha kudya kuchokera pansi. Sangachite chilichonse ndi chakudya choyandama.
Chifukwa cha kukula kwawo, chakudya chomwe mwachibadwa m'dziwe sichikwanira; Chakudya chapadera chiyenera kudyetsedwa. Chapadera apa ndikuti amamira pansi mwachangu ndipo samapitilira 14%. Mapuloteni ndi mafuta ochuluka kwambiri. Kudyetsa kuyenera kuchitika madzulo, chifukwa ma sturgeons amagwira ntchito kwambiri pano. Nyama zazing'ono zimafunikanso kudyetsedwa kangapo patsiku.
Muyeneranso kuonetsetsa kuti chakudya sichigona m'madzi kwa ola limodzi, mwinamwake, chidzanyalanyazidwa kwathunthu. Malo ena odyetserako bwino amayenera kugwiritsidwa ntchito, pomwe chakudyacho sichimwazika motalikirapo ndipo motero "chosanyalanyazidwa": Chimagwira ntchito bwino m'dera lathyathyathya. Chitsogozo cha kuchuluka kwa chakudya ndikuti pafupifupi 1% ya kulemera kwa thupi kuyenera kudyetsedwa patsiku.
Chochitika chapadera chimachitika pamene ma sturgeons amagwirizanitsidwa ndi Koi. Nsombazi zimadziwika kuti ndi omnivores ndipo ngati simusamala, sipadzakhala chakudya cha sturgeon osauka pansi. Izi ndizoyipanso kwa koi chifukwa chakudya chamafuta ambiri chimawononga nthawi yayitali. Mungapindule kwambiri. Muyenera kudyetsa usiku kapena (zomwe zimachitidwa ndi eni ake ambiri) mumadyetsa chakudyacho mothandizidwa ndi chitoliro ku dziwe la pansi, kumene sturgeon akhoza kudya nthawi yomweyo.
Kutseka Mawu
Pamapeto pake, muyenera kusankha nokha malo omwe mukufuna kutenga pa nkhani ya sturgeon. Komabe, ngati mwasankha pa nsomba zotere, muyeneranso kupanga zofunikira za dziwe kuti sturgeon ikhale yomasuka. Ndipo izi zimaphatikizapo pamwamba pa danga, danga, danga!