Ukushisa kwamanzi, izinga lokushisa elincane kanye nesiphezulu phakathi nonyaka.
Amazinga e-oksijeni
Amazinga e-Amoniya
pH
Ukubonakala emakholomu amanzi
Ukuhlaziywa okugcwele kwekhwalithi yamanzi kuyobandakanya ukuhlola amanzi ukuze kube khona izinsimbi ezinzima, okuvame ukuthi kuyingozi kakhulu ukudoba, kusho umphathi oyinhloko wezobuchwepheshe be-Aquaculture: uMnyango Wezilwane Sayensi, eNyuvesi yaseStellenbosch.
Izidingeko Zendawo Zokufuya Izinhlanzi
Izidingo ezijwayelekile zesayithi elihle lokukhiqiza yizi:Idamu, noma indawo enezinhlanzi zezinhlanzi, kufanele isondele ku-hatchery. Lokhu kuzonciphisa isikhathi sokuthutha ukuqinisekisa ukuthi izinhlanzi ezincane (ezibizwa ngokuthi ama-fingerlings) zingahanjiswa emkhosini wenetha empilweni ephelele.
Ukulondeka okuhle kuzokunciphisa ukwebiwa kwezinhlanzi nokuchithwa kwamaketanga enetha, amaphampu namathangi.
Lokhu kwenza ukudluliselwa kwamantombazane emagumbini, amathangi noma idamu lula futhi kuqinisekisa ukuhamba okuphephile kwezinhlanzi kanye nemishini emanzini. Kuzokwenza kube lula ukuvuna okuphephile futhi okusheshayo okuzoqinisekisa ukuthi izinga elihle lomkhiqizo lizokwenza.
Imbonini yokucubungula kufanele isondele ngokwanele edameni ukugcina uketshezi olubandayo (amazinga okushisa aphansi evela epulazini kuya efektini bese esitolo). Ukugcina izinga lokushisa eliphansi kuzovumela ukulethwa kwezinhlanzi ezintsha.
Ukujula okungenani kwedamu kufanele kube yi-8 m, kodwa amadamu ajulile angcono. Uma amakheji enetha ahlale e-5 m ejulile emanzini, kungcono ukuthi ube nesikhala esanele phakathi kwamanetha nesisekelo samadamu. Lokhu kuncishisa ukwakhiwa kwemfucuza yesikhathi eside ngaphansi kwamakheji, okwenza izinga lemanzi lamanzi, lichaza uHenk Stander. Ukujula okufanayo kufaka ukuvula izinhlelo zokulima epulazini.Translated by Nsika Khoza