Otų (Psetta maxima (L.)) ir upinių plekšnių (Platicthys flesus trachurus Duncker, 1892) jauniklių gausumo Lietuvos priekrantėje kaita per parą

• Main Author: Stankus, Svajūnas
• Format: Article in Journal/Newspaper
• Language: Lithuanian; English
• Published: 2009
• Subjects: Turbot
• Online Access: http://lmavb.lvb.lt/LMAVB:ELABAPDB5891604&prefLang=en_US

The studies were carried out in August 2007 and 2008. Abundance of turbot and flounder juveniles has been investigated in natural light/dark conditions. The investigation was carried out within 24 hours with 4-hour intervals at 9 h, 13 h, 17 h, 21 h, 1 h at night and 5 h in the morning. The ratio of abundance of juveniles of these species has been found to change within 24 hours. The greatest abundance of turbot and flounder 0+age class was noted during the dark period. In different years the catches of flounder 0+age class were 2,4-3,0 times greater compared with those of turbot. However, at 1 h at night this difference increases up to 6,4-9,2 times.