A SURVEY OF INSHORE 0-MLYNY LOWLAND RESERVOIR, CZECH-REPUBLIC( JUVENILE FISH COMMUNITY IN THE NOVE)

A survey of 0+ juvenile fish in a newly created lowland reservoir, Nov e Mlyny, Czech Republic, was conducted during the middle of July 1995. Fish were sampled by beach seine at 24 sites in three types of nearsh ore habitat; concrete stepped embankment, stony rip-rap and sandy-grav el beach. The most common species was asp, Aspius aspius (63.9%) follo wed by roach, Rutilus rutilus (21.8%) and ide, Leuciscus idus (9.0%). Other species represented <3% of dominance. Beach stations were signif icantly preferred by 0+ juvenile fish (p<0.001) during the daytime, wi th a CPUE of 31.4 specimens per 1 m net. An almost 15 times lower dens ity of fish was registered at concrete steps and stony rip-rap embankm ent types, however with a more homogenous distribution of juveniles. C ontrary with large rivers a single synchronic survey strategy of 0+ ju venile fish does not describe representatively natural recruitment suc cess in large shallow reservoir.