Fish Hatchery Management - fisheries & aquaculture

l4FISH HA'lcHERY MANACEMENI'TABLT. L sllc;cEs l LD wA f lrR qUALl.fY cRl l l.RIA F()R oP l lMUNt tlEAt.TH oF sALMONIDIISHI.,S, CONCI,N'I'RA'I'ION*S ARI] IN PAI].'I'S P!]R MII,I-ION iPPM). {SOL]RCEw!tt)uNI uYl,lR l 1)77. iCtII-NIIC'.\IL: PPF,R I,I NI I'f S IOR C]ON'I'I N I]0I'S F,XPoSTI R IArrmonia (NH1)L adrnlutnl)t aomilrnlChlorineCopper'Hydrogen sulfidcl-ca dMcrcury (organicor ln orgit n lclN itrogenNirrite (N()2 )L)zOnt'Polychlorinatcdbiphenyls (PCB's)'[otal suspended andZincsettleable solids0.0l2l ppm (un ionizcd form)0.000.1 ppm (in soft n'ater < 100 ppm alkalinity)0.(X)l| pprr (ln hard water )0.013 ppm0.000 ppm in soft water0.002 ppm0.0i3 ppm100 ppm alkalinitv)0.002 ppm maximum, 0.000011 ppm averageMaximum total gas pressure I l0' , of saturation0.1 ppm in soft water,0.2 ppm in hard u'ater (0.0i.iand 0.0(i ppm nitrite-nitrogen)0.(X)r ppm0.(X)2 ppmtlO ppm or less0.013 ppma l'o protect salmonid eggs and frv. l or non-salmonids, 0.00't ppm is acceptable"'I o prottct salmonid eugs and frv. For non-salmonids, 0.01.| ppni is acceptable.tC.ppe.at 0.005 ppm may supress gill adenosine triphosphatase and compromise srroltilicationin anadromous salmonids.Walleye fry hatched in artesian well water containing high levels of calciumand magnesium salts with a dissolved solid content of 1,563 parts permillion were twice the size of hatchery fry held in relatively soft spring fedwater. This rapid growth was attributed to the absorption of dissolvedsolids.Channel catfish and blue catfish have been found in water with salinitiesup to 11.4 parts per thousand. Determination of salinity tolerance in catfishis of interest because of possible commercial production of these species inbrackish water.TurbiditlClay turbidity in natural waters rarely exceeds 20,000 parts per million.Waters considered "muddy" usually contain less than 2,000 parts per million.Turbidity seldom directly affects fish, but may adversely affect productionby smothering fish eggs and destroying benthic organisms in