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<br />09/11/92 <br /> <br />':56 <br /> <br /> <br />URS COt-ISUL TAt-IT D~t-~?\ <br />~~ -~ <br /> <br />003 <br /> <br />001836 <br /> <br />GLOSSARY OF TERMS <br /> <br />810maH . TIltJ (Juur nJ~ ur fi~t I wllict I ear e eiLht;r maintained Of! producod ot tho recovory <br />facility. The capacity of the facility to hold and grow fish is expressed in term.s of pounds <br />of fl$h or toto.l biomass. : <br /> <br />Brood.tock . Fish of a particular species, reprosented by bolh sexes which are held In <br />captivity until and during maturity for the distinct purpose of cr;ossbreeding. The genetic <br />history Is usually known for these animals and they are usua~ly bred according to strict <br />protocols designed to maintain a level of genetic diversity iln the progeny. F"or the <br />purposes of this facility, rafugla and brood stock populations ~re considered the same. <br /> <br />Culture Techniques - Different methodologies which are used: to hatch and produce fish. <br />For this report, the two categories of culture techniques ~re intensive culture and <br />extensive culture. : <br /> <br />extensive Culture - A culture methodology which tJrnptU:l~IZtJ5 IIIUI tJ r Il:slural rearing <br />t.'Onditions for fish Ulat are reared in an arUnclal envlronnient. Under extonsive culture <br />condillons fish are reared at low donSity in outdoor ponds.: Reerlng Is conductod at <br />ambient lemperatures and natural feed ilel1l5 are enc:ouroged to grow In tho pond <br />environment. This strategy Is employed to alleviate hatchery, Induced pressures which <br />may work selectively on the genetic diversity of the fish bei~9 cultured. This method <br />requires less water and more land than intensive oulture. ! <br /> <br />Intonslve Culture. A oulture methodology designed to aohlev~ maximum productivity for <br />fish held In artificial culture environments. The fish are held .t higher densities In tanks <br />or raceways and fed an artificial diet. Rearing temperatures Bre held at values which are <br />known to achieve maximum growth rates. Water flow rate ~re high to maintain water <br />quality by carrying away waste producls, and excess feed. Ttle primary goal of Imensive <br />culture is to achieve maximum fish production levels for a given rearing space while <br />maintaining healthy stocks of fish. i <br /> <br />Relugl8 - Individual fiSh representing genetically distinct sto~kS 01 a particular sp8cte~ <br />held In captive habitat. Usually held In reserve for use as! future broodstock and to <br />provld6 an environment for proteotlon and survival of utJcllnlrlY ~ IUllluar or endangered fish <br />ill UltJ wild. TtltJ fJurJJu~tJ I~ tv Ifll:lillll::lill UltJ ytJllt#Lic diversily qf a species by maintaining <br />representative examples of distinct. genetically diverse 5ttains from specific natlvo <br />habitats. i <br /> <br />22 <br />