| Thi sexper i mentst udi ed t heef f ect sofear l ysi zegr adi ngon gr owt h and wat erqual i t yofM i cr opt er ussal moi des
and t hehybr i d ofChanna or gus意伊C.macul at a裔.J uveni l eM .sal moi des ( 3. 15 依 0. 12 cm)and t he hybr i d ofC.or gus意伊 C.
macul at a裔 ( 1. 59 依 0. 08 cm)wer e si ze gr aded by netcage t hr ee t i mes i n t he same pond.M or eover ,t he exper i mentf i shes
shoul d bedi vi ded i nt ot hr eedensi t i esbr eedi ngf or7 d accor di ngt ot hesi zei n each gr adi ng.Af t er21 d ofcl assi f i cat i on,body
wei ghtand l engt h ofM .sal moi des and t he hybr i d ofC.or gus意 伊 C.macul at a裔 r educed wi t h densi t y i ncr easi ng,butt he
di f f er ence wasnotsi gni f i cant .The sur vi valr at e ofM.sal moi dessi gni f i canti ncr eased wi t h hi er ar chi calbr eedi ng.Uni f or mi t y
oft wo exper i mentf i shessi gni f i canti ncr eased wi t h hi er ar chi calbr eedi ng,whi l e t he aver age body l engt h var i at i on coef f i ci ent
si gni f i cantdecl i ned.The cont entofNH 4 + -N,TN,NO 2 -N and TP i n br eedi ng wat ersi gni f i cant l y el evat ed wi t h hi er ar chi cal
br eedi ng.Testr esul t sshowed t hatt he ear l y cl assi f i cat i on coul d i mpr ove t he uni f or mi t y ofM .sal moi desand t he hybr i d ofC.
or gus意伊C.macul at a裔,al so coul d ef f ect i vel y i mpr ove t he sur vi valr at e oft he hybr i d ofC.or gus意 伊C.macul at a裔 by
21. 9圆% ,buthad nos i gni f i canti mpacton t hesur vi valr at eofM.s al moi des . |
