FADに対するブリ幼稚魚の蝟集評価 Effect of FAD(Fish Aggregating Devices) for Gathering Juvenile Yellowtail Seriola quinqueradiata
This paper investgates the gathering behavior of fish to the FAD. Juveniles of <i>Seriola quinqueradiata</i> were observed. The experiment used an outdoor experimental tank and the FAD models to evaluate the gathering behavior and distribution during diurnal change.<br>The distribution pattern of juvenile <i>Seriola quinqueradiata</i> during diurnal change matched the change of light intensity. In the daytime, the fish gathered to the models but in the nighttime, didnot. The juveniles of <i>Seriola quinqueradiata</i> stayed beneath a model FAD at relative position for a long time. The ratio of the index of gathering density which reflects the gathering behavior depended on the shape of the model. The ratio was a high value in each experiment, and so the juveniles of <i>Seriola quinqueradiata</i> exhibited a strong gathering behavior.
日本水産学会誌 63(2), 194-200, 1997-03-15