Ukusebenza kobunjiniyela be-hydraulic emvelweni kubalulekile ekulondolozweni kwezinsiza zokudoba. Ijubane lamanzi laziwa ukuthi lithinta ukuzala kwezinhlanzi eziletha amaqanda akhukhulekayo. Lolu cwaningo luhlose ukuhlola imiphumela yokuvuselelwa kwejubane lamanzi ekuvuthweni kwe-ovarian kanye namandla okulwa ne-antioxidant e-carp yotshani yabantu abadala (i-Ctenopharyngodon idellus) ngokusebenzisa izivivinyo zelebhu ukuze siqonde indlela yokusebenza komzimba eyisisekelo sempendulo yokuzala kwemvelo ekugelezeni kwemvelo. Sihlole i-histology, ama-hormone ocansi kanye nokugcwala kwe-vitellogenin (VTG) kwe-ovary, kanye nokuqoshwa kwezakhi zofuzo ezibalulekile ku-hypothalamus-pituitary-gonad (HPG) axis, kanye nemisebenzi ye-antioxidant ye-ovary nesibindi ku-carp yotshani. Imiphumela ibonise ukuthi yize kungekho mehluko obonakalayo ezicini zokuthuthukiswa kwe-ovarian ye-carp yotshani ngaphansi kokuvuselelwa kwejubane lamanzi, i-estradiol, i-testosterone, i-progesterone, i-17α,20β-dihydroxy-4-pregnen-3-one (17α,20β-DHP), kanye nokugcwala kwe-VTG kwaphakanyiswa, okwakuhlobene nokulawulwa kokubhalwa kwezakhi zofuzo ze-HPG axis. Amazinga okuvezwa kwezakhi zofuzo (gnrh2, fshβ, lhβ, cgα, hsd20b, hsd17b3, kanye ne-vtg) ku-axis ye-HPG akhushulwe kakhulu ngaphansi kokukhuthazwa kwejubane lamanzi, kuyilapho lawo e-hsd3b1, cyp17a1, cyp19a1a, hsd17b1, star, kanye ne-igf3 ancishisiwe. Ngaphezu kwalokho, ukukhuthazwa kwejubane lamanzi okufanele kungathuthukisa isimo sempilo yomzimba ngokwandisa imisebenzi yama-enzyme e-antioxidant esibelethweni nasesibindini. Imiphumela yalolu cwaningo inikeza ulwazi oluyisisekelo kanye nokusekelwa kwedatha kokusebenza kwemvelo kwamaphrojekthi kagesi wamanzi kanye nokubuyiselwa kwemvelo komfula.
Isingeniso
Idamu iThree Gorges (TGD), elisengxenyeni ephakathi yoMfula iYangtze, liyiphrojekthi enkulu kunazo zonke emhlabeni yokuphehla ugesi ngamanzi futhi lidlala indima ebalulekile ekusebenziseni nasekusebenziseni amandla omfula (Tang et al., 2016). Kodwa-ke, ukusebenza kwe-TGD akugcini nje ngokushintsha kakhulu izinqubo zamanzi emifuleni kodwa futhi kusongela izindawo zokuhlala zasemanzini kokubili phezulu nangezansi kwendawo yedamu, ngaleyo ndlela kunegalelo ekonakaleni kwezindawo zemvelo eziseceleni kwemifula (Zhang et al., 2021). Ngokuningiliziwe, ukulawulwa kwamachibi kuhlanganisa izinqubo zokugeleza kwemifula futhi kunciphisa noma kuqede iziqongo zezikhukhula zemvelo, ngaleyo ndlela kuholele ekunciphiseni kwamaqanda ezinhlanzi (She et al., 2023).
Umsebenzi wokuzala izinhlanzi cishe uthonywa izici ezahlukahlukene zemvelo, okuhlanganisa ijubane lamanzi, izinga lokushisa lamanzi, kanye nomoya-mpilo oncibilikisiwe. Ngokuthonya ukwakheka kwama-hormone kanye nokukhiqizwa kwawo, lezi zici zemvelo zithinta ukuthuthukiswa kwezinhlanzi (Liu et al., 2021). Ikakhulukazi, ijubane lamanzi liye laqashelwa ukuthi lithinta ukuzala kwezinhlanzi eziletha amaqanda akhukhulekayo emifuleni (Chen et al., 2021a). Ukuze kuncishiswe imiphumela emibi yokusebenza kwamadamu ekuzaleni izinhlanzi, kubalulekile ukusungula izinqubo ezithile ze-eco-hydrological ukuze kukhuthazwe ukuzala kwezinhlanzi (Wang et al., 2020).
Ama-carp amane amakhulu aseShayina (FMCC), okuhlanganisa i-black carp (Mylopharyngodon piceus), i-grass carp (Ctenopharyngodon idellus), i-silver carp (Hypophthalmichthys molitrix), kanye ne-bighead carp (Hypophthalmichthys nobilis), ezizwela kakhulu ezinqubweni zamanzi, amelela izinhlanzi ezibaluleke kakhulu kwezomnotho eShayina. Inani le-FMCC lizothuthela ezindaweni zokuzalela bese liqala ukuzalela ngenxa yokugeleza kwamanzi amaningi kusukela ngoMashi kuya kuJuni, kuyilapho ukwakhiwa nokusebenza kwe-TGD kushintsha isigqi semvelo samanzi futhi kuvimbele ukufuduka kwezinhlanzi (Zhang et al., 2023). Ngakho-ke, ukufaka ukugeleza kwemvelo ohlelweni lokusebenza lwe-TGD kungaba yindlela yokunciphisa ukuvikela ukuzalela kwe-FMCC. Kuye kwabonakala ukuthi ukusebenzisa izikhukhula ezenziwe ngabantu njengengxenye yokusebenza kwe-TGD kuthuthukisa impumelelo yokuzala ye-FMCC ezindaweni ezingezansi komfula (Xiao et al., 2022). Kusukela ngo-2011, kuye kwahlelwa imizamo eminingana yokukhuthaza ukuziphatha kokuzalela kwe-FMCC ukuze kuncishiswe ukwehla kwe-FMCC evela eMfuleni iYangtze. Kwatholakala ukuthi ijubane lamanzi elibangela ukuzalela kwe-FMCC lalisukela ku-1.11 kuya ku-1.49 m/s (Cao et al., 2022), ngejubane lokugeleza elifanele elingu-1.31 m/s lahlonzwa ukuze kuzalele i-FMCC emifuleni (Chen et al., 2021a). Nakuba ijubane lamanzi lidlala indima ebalulekile ekuzaleni kwe-FMCC, kukhona ukuntuleka okuphawulekayo kocwaningo mayelana nendlela yokuphila esekela impendulo yokuzala kwemvelo ekugelezeni kwemvelo.
Isikhathi sokuthunyelwe: Agasti-05-2024