Cov ntses tilapia (Oreochromis spp) yog uniparental mouthbrooders, nrog rau cov poj niam incubating tshiab fertilized qe thiab larvae nyob rau hauv lub qhov ncauj kab noj hniav, feem ntau mus txog rau thaum tag nrho cov nqus ntawm larva yolk sac [5].
qhov ncauj brooding hauv tilapia yog dab tsi?
Tsab dub-chinned tilapia (Sarotherodon melanotheron) yog suav tias yog paternal mouthbrooder uas tus txiv neej churns lub qe nyob rau hauv nws lub qhov ncauj rau 14-18 hnub tom qab lawv fertilized… Tom qab ntawd sim qhov kev xav tias qhov pib ntawm qhov ncauj ua rau txo qis hauv androgen thiab estradiol.
tilapia qhov ncauj ntev npaum li cas?
Thaum lub sij hawm incubation, tus poj niam tilapia yuav nqa cov qe fertilized rau hauv nws lub qhov ncauj. Tom qab 48 teev, lub qe yuav pib tsim tails. Cuaj caum-rau teev tom qab no, lawv yuav tsim lawv lub taub hau. Tom ntej no xya hnub, cov kib yuav pib tawm ntawm lawv niam lub qhov ncauj.
Pob tilapia muaj lub puab tsaig?
Lawv lub qhov ncauj yog protrusible, feem ntau ciam teb nrog dav thiab feem ntau o daim di ncauj. Lub puab tsaig muaj cov hniav zoo nkauj … Tilapia kuj paub tias yog hom kab hauv qhov ncauj, uas txhais tau hais tias lawv nqa cov qe fertilized thiab cov ntses hluas nyob rau hauv lawv lub qhov ncauj ob peb hnub tom qab lub yolk sac absorbed.
Pob tilapia nqa qe hauv qhov ncauj?
Tus poj niam tilapia nteg qe rau hauv qhov (zes) thiab tom qab fertilization los ntawm cov txiv neej, tus poj niam khaws cov qe hauv nws lub qhov ncauj(kab noj hniav) kom lawv mus txog thaum hatching.
