Professional paper
SUPPLEMENTAL STOCKING OF EYED BROWN TROUT EGGS (SALMO TRUTTA M. FARIO L., 1758) WITH THE USE OF WHITLOCK–VIBERT BOXES
2006, 64 (3) p. 113-123
Manuela Turković, Boris Hrašovec, Nikica Šprem
Abstract
The research was carried out in the Upper Kupa valley at three different locations–brooks, Lešnički potok, Lešnički jarak and Grčac. During the research efficiency of stocking with Whitlock Vibert boxes were studied. During the three month research period (January 2005 — April 2005) 4000 eyed brown trout eggs from 3 different sources were placed in 14 Whitlock–Vibert boxes. During the research resultes from Grčac brook were excluded from the final analysis of efficiency of Whitlock–Vibert boxes because of technical problems, so resultes for the final analysis were used from 2800 eyed brown trout eggs that were placed in 10 Whitlock–Vibert boxes where 99,53% of the eggs had successfully hatched. The results have shown that the use of Whitlock–Vibert boxes with eyed brown trout eggs is prosperous and that the efficiency of Whitlock–Vibert boxes depends on the quality of eggs and choice of box burial in the stream bed. The research was conducted in the context of the regular management obligations of the fishing right owner on the research area.
Keywords
whitlock–vibert box, brown trout, incubator, supplemental stocking