Occurrence and Migration of Stone Flounder Larvae in Matsukawaura
1987 Volume 35 Issue 2 Pages 83-90
Details
1987 Volume 35 Issue 2 Pages 83-90
The transport mechanism of larvae of stone flounder, Kareius bicoloratus was investigated from January 23th to February 17th, 1986 in the mouth of Matsukawaura inlet, Fukushima prefecture. The number of larvae peaked on January 27th and decreased gradually then after. A diurnal peak of occurrence was observed at the turning point of the tide (flooding to ebbing) . The peak occurred during the day time only.
The size of the larvae caught at Matsukawaura inlet at both the inflow and outflow were mostly 3.0-7.0mm in total length. Larvae with size greater than 11 mm were few and those between 7-11 mm were very few. This suggests that the first feeding stage larvae (3.0-5.0 mm in total length) had already reached near the coast of Matsukawaura and transported by the tide into the inlet.
Results of gut analysis using histolgical staining of rectal epithelial cells and food occurrence methods showed that more than 80% of the larvae were found to be feeding.
