Umxholo
Inkqubo ye- izilwanyana ze-ovuliparous Zizo ezo zinokuchumisa kunye nokukhula kombungu kwangaphandle, oko kuthetha ukuba, ngaphakathi kwesakhelo sokuzala ngokwesondo, zombini ukuchumisa kweqanda kunye nokukhula okwenzeka ngalo kwenzeka ngaphandle komzimba womfazi. I-Ovuliparity luhlobo lwe-oviparity, kwaye uninzi lweentlobo zeli qela ziintlanzi.
Inkqubo yokuvelisa kwakhona kwizilwanyana ze-ovuliparous zenzeka ngendlela ehambelanayo:
- Imazi iyawagxotha amaqanda ayo ize iwabeka kwiindawo ezifihlakeleyo, apho kungenzeki ukuba amarhamncwa afikelele khona.
- Indoda iyawaqaphela la maqanda ize iwafake isichumiso, ngelo xesha iseli yeqanda iyenziwa engazukubaneqokobhe.
- Emva koko elo qanda liyakukhula, eliyakwenza ngaphandle koncedo lomntu obhinqileyo okanye owesilisa. Oku kubeka umngcipheko kumaqanda amaninzi, kuba amarhamncwa anokunciphisa inani lenzala.
Ngenxa yokufana ngokwemiqathango, abantu abane-ovuliparous bahlala bedidekile oviparous (izilwanyana ezinokuchumisa ngaphakathi okanye ngaphandle, ngokukhula kombungu kwangaphandle), kunye viviparous (izilwanyana ezinokukhula kombungu emzimbeni womama) okanye kunye sivuyisile (Izilwanyana ezizala ngamaqanda ezigcinwa ngaphakathi emzimbeni womama kude kube sekupheleni kokukhula kombungu).
- Izilwanyana ezinomdla
- Izilwanyana ezinomdla
- Izilwanyana ezitya utyani
Imizekelo yezilwanyana ezi-ovuliparous
- Amphibians: Amasele ababhinqileyo banee-ovari zabo ecaleni kwezintso zabo. Amadoda, nawo anamasende ecaleni kweentso zawo, asondela kwiimazi kwinkqubo ebizwa ngokuba yi-amplexus, ekhuthaza ukukhutshwa kwamaqanda. Emva kokuba zikhululwe, inkunzi izakuyichumisa kwaye emva kweeveki ezimbalwa amancinci aya kuzalwa, abambeke kulwelo lwe-gelatinous lweqanda de babe banokukhululwa.
- Starfish ngokuzala kwakhonaAmaqanda angachunyiswanga akhutshelwa elwandle, kwindawo enye apho iinkunzi zikhulula khona isidoda. Ukutyiswa kwamaqanda ngexesha lokumitha kunye nezakha mzimba ezigcinwa ngaphakathi, kunye namanye amaqanda e-starfish. Ezinye iisampulu zolu hlobo zivelisa i-asexually.
- IiMollusks: Imbaza yabasetyhini ifaka izigidi zamaqanda elwandle, aguquka abe yimibungu aze azinze kwiindawo eziqinileyo, ukuze achumiswe kwaye amiswe ixesha elihlala phakathi kweveki enye okanye ezimbini. Kunyaka omnye unyaka ii-clams kunye neembaza zifikelela ekukhuleni ngokwesondo.
- Abantu baseCrustaceans: Ukuzaliswa kwakhona kwenzeka emva kwenkqubo yokuthandana, apho indoda ikhupha i-spermatophore kwindawo ephambili ye-cephalothorax yabasetyhini. Ngokukhulula amaqanda, uyophula ingxowa kwaye akhulule amadlozi endoda ukuze achumise amaqanda kwimeko engaphandle.
- IiHedgehogs: Amabhinqa ayawakhulula amaqanda kwiindawo ezifihlakeleyo zamaza, kwaye amadoda asondela kwiindawo ezivezwe kakhulu kukuchumisa.
- Oononkala
- Umqala
- Imijelo
- Iimbaza
- Silverside
Ingakukhonza:
- Izilwanyana eziViviparous
- Izilwanyana ezivuthayo
