Fish Hatchery Management - fisheries & aquaculture

tsR(X)DS]'OCK, SPAWNING, AND E,GG HANDLINGr91Tlgll21. DArLy 'I'EMILRAt tjRt rJNrl REqtJrRL,D roR EGC DEVEr.opMnNT oFPectrtc sALMoN.DAI I,\"f I,N'II'[,RA'I'I.IRI] T]N I SSPT,CIT,S'| () ltYI,'I() TIA'I'CII'l () EMt-R(;lChinook salmonCoho salmonChum salmonI'ink salrronSockeye salmon.150'1507507509(X)750750I,100900I,200l,600I,750I,,1501,,150l,u00l l.\l l'1.IL,\'l t' Itl.Chinook salmon cggs have been incubated at temperatures as high as (il"Fwithout significirnt loss. Whcn incubated at.tr0'F and below, they have amuch higher mortality than those incubirted at temperatures of 57 to 60'F.Hou'ever, if chinook salmon cggs are allowed to develop to the l2U-cellstage in ,12'1" water, they can tolcrate l]5"F water for the remainder of theincubation pcriod. Lowcr temperatures have been experienced by sockeyeand chir-rook in natural spawning environments with fluctuating temperaturcswithout adverse affects. 'l'he lower threshold temperature for normaldevelopment of sockcyc salmon is between .10 and 42"F, with an upperthreshold temperature between 55 and 57'F. Watcr temperature appears tobe a primary factor in causing yolk-sac constriction in landlocked Atlantics:rlrnon fry. It apparently is triggcrcd by both constant temperature or anexcessively warm temperature. Fry raiscd in cold water with fluctuatingtempcraturc do not develop the constriction unless they are moved into awarrTler constant tenlDeret tllre.l',rnt.l: 22. RIreutREI) DAII.\' fuMptiRr\TURE UNrrs !'oR rNl.rrAr. DEVELopMENT oFVARI0L]S COOI,, ANI) WARMWAI'F]R SPF,CIES-SPECI I]SllGCl;\KIlI'O HAI'C]H,rllll{r_r_cl\_s_119.IIA I'C]II -I'OAC'I IVI.] SWIllINIINC;A( t l\',lll () s'l AR I ol,SWIiU NIIN(;I.EI]I)INGChannel catfishLargernouth bassSmallmouth bassHybrid sunfishBluegillRedear sunfishNorthern pikeM uskellungeWalleyeStriped bass3501.10I ll07575100Iu02:15300100509010090100100502(;02090100u0tt0r00100100100100201305003103102(i52753003ll059534t)320