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<H2><A href="/journal/118545114/home">Aquaculture Research</A></H2>
<DIV class=volIss><STRONG><A href="/journal/122553071/issue">Volume 40 Issue 12</A>, Pages 1358 - 1362</STRONG></DIV>
<P class=pubOnline><STRONG>Published Online: </STRONG>25 Jun 2009</DIV></DIV>
<DIV class=title-document> </DIV>
<DIV class=title-document>Effect of antibiotic treatment on the growth and survival of juvenile northern Chilean scallop, <SPAN class=i><EM>Argopecten purpuratus</EM></SPAN> Lamarck (1819), and associated microflora in experimental cultures</DIV></DIV>
<DIV class=author-info><SPAN class=name><SPAN class=forenames>Jorge</SPAN> <SPAN class=surname>Fierro</SPAN> <SUP><NOBR><FONT size=1>1</FONT></NOBR></SUP> </SPAN>& <SPAN class=name><SPAN class=forenames>Doris</SPAN> <SPAN class=surname>Oliva</SPAN> <SUP><NOBR><FONT size=1>2</FONT></NOBR></SUP> </SPAN>
<DIV class=addresses><SPAN class=address><A class=invisible-anchor name=a1><FONT color=#336699> </FONT></A><SPAN id=a1> <SPAN class=number><SUP><NOBR><FONT size=1>1</FONT></NOBR></SUP> </SPAN>Pesquera San José S.A., Coquimbo, Chile</SPAN> <BR><A class=invisible-anchor name=a2><FONT color=#336699> </FONT></A><SPAN id=a2> <SPAN class=number><SUP><NOBR><FONT size=1>2</FONT></NOBR></SUP> </SPAN>Departamento de Biología & Ciencias Ambientales, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso, Chile</SPAN> </SPAN></DIV>
<DIV class=correspondence-address><A class=invisible-anchor name=c1><FONT color=#336699> </FONT></A><SPAN id=c1> <SPAN class=b><STRONG>Correspondence:</STRONG></SPAN> D Oliva, Departamento de Biología & Ciencias Ambientales, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso, Chile. E-mail: <A class=externallink href="mailto:doris.oliva@uv.cl"><FONT color=#336699>doris.oliva@uv.cl</FONT></A></SPAN> </DIV></DIV>
<DIV class=header-footnotes>
<DIV class=bpg40copyright>Copyright Journal Compilation © 2009 Blackwell Publishing Ltd</DIV></DIV>
<DIV class=keywords-block xmlns="http://www.w3.org/1999/xhtml">
<DIV class=keyword-title>KEYWORDS</DIV>
<DIV class=keywords>chloramphenicol • <SPAN class=i><EM>Argopecten purpuratus</EM></SPAN> • hatchery</DIV></DIV>
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<H1 id=h0 class=abstract-title>ABSTRACT</H1></DIV>
<P class=para>Juvenile northern Chilean scallops of 937±55 μm shell height were exposed to five different concentrations of chloramphenicol (CHL) (5, 10, 25, 50 and 100 μg mL<SUP><NOBR><FONT size=1>−1</FONT></NOBR></SUP>), plus a control without antibiotics. To determine the effect of CHL on the accompanying microflora, the number of colony-forming units (CFU) that grew on TGE culture medium was counted in the seawater of containers with juveniles, and in containers with microalgae used as food. Both were exposed to the same concentrations of CHL. The growth rates of juveniles treated with CHL and the control without antibiotic showed highly significant differences (<SPAN class=i><EM>P</EM></SPAN>=0.0001). The growth rate was inversely proportional to the CHL concentration. The control sample presented the highest growth rate (84.4±14.3 μm day<SUP><NOBR><FONT size=1>−1</FONT></NOBR></SUP>), followed by the sample treated
with 5 μg mL<SUP><NOBR><FONT size=1>−1</FONT></NOBR></SUP> (64.2±14.3 μm day<SUP><NOBR><FONT size=1>−1</FONT></NOBR></SUP>). The survival in the control and in the treated samples with 5–50 μg mL<SUP><NOBR><FONT size=1>−1</FONT></NOBR></SUP> was rather high, with a mean value of 95%. Only the sample treated with 100 μg mL<SUP><NOBR><FONT size=1>−1</FONT></NOBR></SUP> had a low survival (36.7%). The CFU count was larger in the containers with juveniles, when compared with the ones with food. The CFU count tended to decrease with increasing CHL concentration in the juveniles.</DIV></DIV></DIV></td></tr></table><br>