Kukurumidza kwemvura kunokanganisa kukura kwemaovari uye kugona kwayo kurwisa ma antioxidants muganda remaovari (Ctenopharyngodon idellus)

Kushanda kwe hydraulic engineering mukuchengetedza zviwanikwa zvehove kwakakosha pakuchengetedza zviwanikwa zvehove. Kumhanya kwemvura kunozivikanwa kuti kunokanganisa kubereka kwehove dzinoburitsa mazai ari kuyerera. Chidzidzo ichi chine chinangwa chekuongorora mhedzisiro yekukurudzirwa kwekukurumidza kwemvura pakukura kwe ovarian uye kugona kwe antioxidant kwe adult grass carp (Ctenopharyngodon idellus) kuburikidza nekuyedza murabhoritari kuitira kuti tinzwisise mashandiro emuviri ari pasi pemhinduro yekubereka kwechisikigo kune ecological flows. Takaongorora huwandu hwe histology, ma sex hormones uye vitellogenin (VTG) mu ovary, uye zvinyorwa zvemajini akakosha mu hypothalamus-pituitary-gonad (HPG) axis, pamwe nemabasa e antioxidant e ovary nechiropa mu grass carp. Mhedzisiro yacho yakaratidza kuti kunyangwe pakanga pasina musiyano unooneka pahunhu hwekukura kwe ovarian hwe grass carp pasi pe water velocity stimulation, estradiol, testosterone, progesterone, 17α,20β-dihydroxy-4-pregnen-3-one (17α,20β-DHP), uye huwandu hweVTG hwakakwira, izvo zvaive zvine chekuita ne transcriptional regulation yemajini eHPG axis. Mazinga ekushandiswa kwemajini (gnrh2, fshβ, lhβ, cgα, hsd20b, hsd17b3, uye vtg) muHPG axis akakwira zvakanyanya pasi pekukurudzira kumhanya kwemvura, nepo ayo ehsd3b1, cyp17a1, cyp19a1a, hsd17b1, star, uye igf3 akaderedzwa. Pamusoro pezvo, kukurudzira kumhanya kwemvura kwakakodzera kunogona kusimudzira hutano hwemuviri nekuwedzera mabasa ema enzymes e antioxidant mu ovary nechiropa. Mhedzisiro yechidzidzo ichi inopa ruzivo rwakakosha nerutsigiro rwedata rekushanda kwezvakatipoteredza kwemapurojekiti emagetsi emvura uye kudzoreredzwa kwezvakatipoteredza murwizi.
Nhanganyaya
Dhamu reThree Gorges (TGD), riri pakati peRwizi rweYangtze, ndiro purojekiti huru pasi rose yemagetsi emvura uye rine basa guru mukushandisa nekushandisa simba rerwizi (Tang et al., 2016). Zvisinei, kushanda kweTGD hakungochinji zvakanyanya maitiro emvura munzizi chete asiwo kunotyisidzira nzvimbo dzemumvura dziri kumusoro nepasi penzvimbo yedhamu, nokudaro zvichikonzera kuparara kwenzvimbo dzemurwizi (Zhang et al., 2021). Muchidimbu, kudzorwa kwemadziva emvura kunoita kuti kufamba kwenzizi kuenderane uye kunonetesa kana kubvisa misoro yemafashamo echisikigo, nokudaro zvichikonzera kudzikira kwemazai ehove (She et al., 2023).
Kubereka hove kunogona kunge kuchikonzerwa nezvinhu zvakasiyana-siyana zvakatipoteredza, kusanganisira kumhanya kwemvura, tembiricha yemvura, uye okisijeni yakanyungudika. Nekukanganisa kugadzirwa uye kuburitswa kwemahormone, zvinhu izvi zvakatipoteredza zvinokanganisa kukura kwehove (Liu et al., 2021). Kunyanya, kumhanya kwemvura kwakaonekwa kuti kunokanganisa kubereka kwehove dzinotakura mazai anoyerera munzizi (Chen et al., 2021a). Kuti kuderedze migumisiro yakaipa yekushanda kwemadhamu pakubereka hove, zvakakosha kutanga maitiro chaiwo e eco-hydrological kuti akurudzire kubereka hove (Wang et al., 2020).

Hove huru ina dzekuChina (FMCC), dzinosanganisira black carp (Mylopharyngodon piceus), grass carp (Ctenopharyngodon idellus), silver carp (Hypophthalmichthys molitrix), uye bighead carp (Hypophthalmichthys nobilis), idzo dzinonyanya kubatwa nemaitiro emvura, dzinomiririra hove dzakakosha zvikuru muChina. Huwandu hweFMCC hwaizotamira kunzvimbo dzekuberekera hove dzotanga kubereka nekuda kwemvura yakawanda kubva munaKurume kusvika munaChikumi, ukuwo kuvaka nekushanda kweTGD kuchichinja mafambiro emvura uye kuchidzivisa kufamba kwehove (Zhang et al., 2023). Saka, kuisa kuyerera kwezvakatipoteredza muchirongwa chekushanda kweTGD kwaizova nzira yekudzivirira kuberekera kweFMCC. Zvakaratidzwa kuti kuita mafashamo anokonzerwa nevanhu sechikamu chekushanda kweTGD kunowedzera kubudirira kwekubereka kweFMCC munzvimbo dziri pasi pehove (Xiao et al., 2022). Kubva muna 2011, kwakarongwa kuyedza kwakawanda kukurudzira maitiro ekubereka kweFMCC kuitira kuderedza kudzikira kweFMCC kubva kuRwizi rweYangtze. Zvakaonekwa kuti kumhanya kwemvura kunokonzera kubereka kweFMCC kwaive kubva pa1.11 kusvika 1.49 m/s (Cao et al., 2022), nekumhanya kwakakwana kwekuyerera kwe1.31 m/s kwakaonekwa kuti FMCC inobereka munzizi (Chen et al., 2021a). Kunyangwe kumhanya kwemvura kuchikosha mukubereka kweFMCC, kune kushomeka kwekutsvagisa pamusoro pemaitiro emuviri ari pasi pemhinduro yekubereka kwechisikigo pakuyerera kwezvakatipoteredza.