Ukusebenza kwendalo kubunjineli behydraulic kubalulekile kulondolozo lwemithombo yokuloba. Isantya samanzi siyaziwa ngokuchaphazela ukuzaliswa kweentlanzi ezihambisa amaqanda akhukulisekayo. Olu pho nonongo lujolise ekuphononongeni imiphumo yokuvuselela isantya samanzi kwi-ovarian maturation kunye ne-antioxidant ye-antioxidant ye-carp yengca yabantu abadala (i-Ctenopharyngodon idellus) ngokusebenzisa iimvavanyo zebhubhoratri ukuze kuqondwe indlela ye-physiological ephantsi kwempendulo yokuveliswa kwendalo kwi-ecological flows. Siye savavanya i-histology, i-hormone yesondo kunye ne-vitellogenin (VTG) yoxinaniso lwe-ovary, kunye nokubhalwa kweejene eziphambili kwi-hypothalamus-pituitary-gonad (HPG) axis, kunye nemisebenzi ye-antioxidant ye-ovary kunye nesibindi kwi-carp yengca. Iziphumo zibonise ukuba nangona kwakungekho mmahluko ocacileyo kwiimpawu zokuphuhliswa kwe-ovarian yengca ye-carp phantsi kokuvuselela isantya samanzi, i-estradiol, i-testosterone, i-progesterone, i-17α, i-20β-dihydroxy-4-pregnen-3-enye (i-17α, i-20β-DHP), kunye ne-VTG i-concentrations iphakanyisiwe, ehambelana ne-tragnes ye-HPG. Amanqanaba entetho yemfuza (gnrh2, fshβ, lhβ, cgα, hsd20b, hsd17b3, kunye ne-vtg) kwi-axis ye-HPG yayiphakanyiswe kakhulu phantsi kokuvuselela isantya samanzi, ngelixa ezo ze-hsd3b1, cyp17a1, cyp1, 3fg, 7b, kunye ne-7b, i-cyp19, i-stard, i-19a1, kunye ne-7b, icinezelwe. Ukongeza, ukuvuselela isantya samanzi esifanelekileyo kunokuphucula imeko yempilo yomzimba ngokwandisa imisebenzi ye-antioxidant enzymes kwi-ovary kunye nesibindi. Iziphumo zolu phononongo zibonelela ngolwazi olusisiseko kunye nenkxaso yedatha yokusebenza kwe-ikholoji yeeprojekthi zombane wamanzi kunye nokubuyiselwa kwendalo yomlambo.
Intshayelelo
Idama lemiwonyo emithathu (TGD), elikumbindi woMlambo iYangtze, yeyona projekthi yoveliso lombane inkulu ehlabathini kwaye idlala indima ebalulekileyo ekusebenzisaneni nasekuxhaphazeni amandla omlambo (Tang et al., 2016). Nangona kunjalo, ukusebenza kwe-TGD akuguquli kakhulu kuphela iinkqubo zamanzi emilambo kodwa kwakhona kusongela iindawo zokuhlala zasemanzini phezulu nasezantsi kwesiza sedama, ngaloo ndlela kube negalelo ekonakaleni kwenkqubo yendalo yomlambo (Zhang et al., 2021). Ngokweenkcukacha, ukulawulwa kwamadama kwenza i-homogenizes iinkqubo zokuhamba kwemilambo kwaye buthathaka okanye ziphelise iincopho zezikhukula zendalo, nto leyo ekhokelela ekunciphiseni kwamaqanda eentlanzi (She et al., 2023).
Ukuzala kweentlanzi kusenokwenzeka ukuba kuchatshazelwa zizinto ezahlukeneyo zokusingqongileyo, kubandakanywa isantya samanzi, ubushushu bamanzi, kunye neoksijini enyibilikayo. Ngokuphembelela i-hormone synthesis kunye nemfihlo, ezi zinto zokusingqongileyo zichaphazela uphuhliso lwe-gonadal yeentlanzi (Liu et al., 2021). Ngokukodwa, isantya samanzi siye saqatshelwa ukuba sichaphazele ukuzala kweentlanzi ezihambisa amaqanda akhukulisekayo emilanjeni (Chen et al., 2021a). Ukuze kuncitshiswe iziphumo ezibi zokusebenza kwedama ekuzalweni kweentlanzi, kuyimfuneko ukuseka iinkqubo ezithile ze-eco-hydrological ukuvuselela ukuzala kweentlanzi (Wang et al., 2020).
Iikhaphu ezine ezinkulu zaseTshayina (i-FMCC), kuquka i-carp emnyama (i-Mylopharyngodon picus), i-carp yengca (i-Ctenopharyngodon idellus), i-silver carp (i-Hypophthalmichthys molitrix), kunye ne-bighead carp (i-Hypophthalmichthys nobilis), enovelwano kakhulu kwiinkqubo ze-hydrological, imele ezona ntlanzi zibalulekileyo kwezoqoqosho e-China. Abemi be-FMCC baya kufudukela kwiindawo zokuzala kwaye baqale ukuzala ngokuphendula kwiipulses ezihamba phambili ukusuka ngo-Matshi ukuya kuJuni, ngelixa ukwakhiwa kunye nokusebenza kwe-TGD kuguqula isigqi sendalo se-hydrological kunye nokuthintela ukufuduka kweentlanzi (Zhang et al., 2023). Ke ngoko, ukubandakanya ukuhamba kwezinto eziphilayo kwisikimu sokusebenza se-TGD kuya kuba linyathelo lokunciphisa ukukhusela ukuzala kwe-FMCC. Kuye kwaboniswa ukuba ukuphumeza izikhukhula ezilawulwa ngumntu njengenxalenye yomsebenzi we-TGD kuphucula impumelelo yokuzala ye-FMCC kwimimandla ephantsi (Xiao et al., 2022). Ukususela ngo-2011, iinzame ezininzi ziye zaququzelelwa ukukhuthaza ukuziphatha kokuzala kwe-FMCC ukwenzela ukunciphisa ukuhla kwe-FMCC ukusuka kuMlambo waseYangtze. Kwafunyaniswa ukuba isantya samanzi esenza i-FMCC ivelise i-FMCC ukusuka kwi-1.11 ukuya kwi-1.49 m / s (Cao et al., 2022), kunye nesantya esiphezulu se-1.31 m / s ichongiwe ukuzala kwe-FMCC kwimilambo (Chen et al., 2021a). Nangona isantya samanzi sidlala indima ebalulekileyo ekuveliseni kwakhona i-FMCC, kukho ukunqongophala okuphawulekayo kophando kwindlela ye-physiological ephantsi kwempendulo yokuveliswa kwemvelo ekuhambeni kwezinto eziphilayo.
Ixesha lokuposa: Aug-05-2024