Nsomba, pokhala mozama, monga lamulo, siziwona asodzi, koma zimamva bwino momwe asodzi amalankhulira ndikuyenda pafupi ndi madzi. Kuti amve, nsomba ili ndi khutu lamkati ndi mzere wozungulira.
Mafunde amawu amafalikira bwino m'madzi, kotero kuti mafunde aliwonse ndi mayendedwe osokonekera pagombe amafika ku nsomba. Kufika pamalo osungiramo madzi ndikugwedeza chitseko cha galimoto mokweza, mukhoza kuopseza nsomba, ndipo idzachoka pamphepete mwa nyanja. Popeza kuti kufika kumalo osungiramo madzi kumayendera limodzi ndi chisangalalo chokweza, ndiye kuti musadalire nsomba zabwino, zopindulitsa. Nsomba zazikulu, zomwe asodzi amakonda kuziwona ngati chikho chachikulu, zimakhala zochenjera kwambiri.
Nsomba zam'madzi zimagawidwa m'magulu awiri:
- nsomba zakumva bwino kwambiri: carp, tench, roach;
- nsomba zakumva bwino: peka, pa.
Kodi nsomba zimamva bwanji?
Khutu lamkati la nsomba limalumikizidwa ndi chikhodzodzo chosambira, chomwe chimagwira ntchito ngati chowunikira chomwe chimachepetsa kugwedezeka kwa mawu. Kugwedezeka kwamphamvu kumafalikira ku khutu lamkati, chifukwa cha zomwe nsomba zimamva bwino. Khutu la munthu limatha kumva phokoso kuchokera ku 20Hz mpaka 20kHz, pomwe kuchuluka kwa nsomba kumakhala kocheperako ndipo kumakhala mkati mwa 5Hz-2kHz. Tikhoza kunena kuti nsomba imamva kwambiri kuposa munthu, pafupifupi nthawi 10, ndipo phokoso lake lalikulu limakhala mkati mwa mafunde apansi.
Choncho, nsomba zomwe zili m'madzi zimatha kumva phokoso laling'ono, makamaka kuyenda pamphepete mwa nyanja kapena kugunda pansi. Kwenikweni, izi ndi carp ndi roach, choncho, popita ku carp kapena roach, izi ziyenera kuganiziridwa.
Nsomba zolusa zimakhala ndi mawonekedwe osiyana pang'ono a zida zamakutu: zilibe kulumikizana pakati pa khutu lamkati ndi chikhodzodzo cha mpweya. Amadalira kwambiri kupenya kwawo kusiyana ndi kumva kwawo, chifukwa samamva mafunde a phokoso kupitirira 500 Hz.
Phokoso lambiri m’dziwe limakhudza kwambiri khalidwe la nsomba zimene zimamva bwino. M’mikhalidwe yoteroyo, iye angasiye kuyendayenda m’thawe losungiramo madzi kufunafuna chakudya kapena kudodometsa kuswana. Panthawi imodzimodziyo, nsomba imatha kuloweza phokoso ndikugwirizanitsa ndi zochitika. Pochita kafukufuku, asayansi adapeza kuti phokosolo linali ndi mphamvu yamphamvu kwambiri pa carp ndipo, muzochitika zotere, adasiya kudyetsa, pamene pike anapitiriza kusaka, osamvetsera phokoso.
Ziwalo zakumva mu nsomba
Nsombayi ili ndi makutu omwe ali kuseri kwa chigaza. Ntchito ya makutu a nsomba sikuti imangozindikira kugwedezeka kwa mawu, komanso imagwira ntchito ngati ziwalo za nsomba. Panthawi imodzimodziyo, khutu la nsomba, mosiyana ndi anthu, silimatuluka. Kugwedezeka kwa phokoso kumaperekedwa ku khutu kupyolera mu zovomerezeka za mafuta, zomwe zimatenga mafunde otsika kwambiri omwe amapangidwa chifukwa cha kuyenda kwa nsomba m'madzi, komanso phokoso lachilendo. Kulowa mu ubongo wa nsomba, kugwedezeka kwa phokoso kumayerekezedwa ndipo, ngati akunja akuwonekera pakati pawo, amawonekera, ndipo nsomba zimayamba kuchita nawo.
Chifukwa chakuti nsomba ili ndi mizere iwiri yotsatizana ndi makutu awiri, imatha kudziwa mayendedwe okhudzana ndi phokoso lopangidwa. Atazindikira kumene phokoso loopsa likupita, amatha kubisala pakapita nthawi.
M’kupita kwa nthawi, nsombazo zimazolowerana ndi maphokoso osawawopsyeza, koma zikamveka phokoso losadziwika bwino, zimatha kuchoka pamalopo ndipo kusodza sikungachitike.