{"refrec":{"BRefID":14935,"RR":"<b>Ackefors, H.; Gydemo, R.; Westin, L.</b> (1989). Growth and survival of juvenile crayfish, <i>Astacus astacus</i> in relation to food and desity, <b><i>in</i></b>: De Pauw, N. <i>et al.</i> (Ed.) <i>Aquaculture: a biotechnology in progress: volume 1.</i> pp. 365-373","BEntID":14935,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":", <b><i>in</i></b>: De Pauw, N. <i>et al.</i> <i>Aquaculture: a biotechnology in progress: volume 1.</i> pp. 365-373","DocTypID":17,"DocType":"Book chapters","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Ackefors, H.; Gydemo, R.; Westin, L.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Ackefors, H.; Gydemo, R.; Westin, L.","Englishabstract":"Microcosmic experiments were performed with the third stage larvae of the noble crayfish <i>Astacus astacus</i> on the island of Gotland, Sweden. During 4 months the survival and growth of larvae were studied in various stocking densities and with various food items. Both survival and growth rate was higher when the initial stocking density was low. The minimum area for a good survival rate was one larva 2dm<sup>-2</sup>. The highest individual growth rate was obtained in the lowest stocking density, or when <i>Neomysis integer</i>, a combination of <i>N. integer</i> and <i>Chara fragilis</i>, or eel pellets were offered as feed. The highest biomass increase was obtained when <i>N.integer</i> was offered as food item. 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