Hyeon-Ok Shin
Pukyong National University
Korea
Title: Movement range and behavior characteristics of Sebastes schlegeli in Byonsan Peninsular, Korea
Biography
Biography: Hyeon-Ok Shin
Abstract
In order to collect basic information of migration of rockfish (Sebastes schlegeli), the behaviors of rockfish during summer in Byonsan Peninsular located at the coastal of Yellow Sea, Korea were investigated. Three cultured rockfishes CR1 to CR3 [total length (TL) 33.0±1.0 cm; body weight 493±32 g] were tagged with the acoustic tag. CR1 and CR2 were tagged externally with the acoustic tag. CR3 was tagged with an acoustic tag internally by surgical method. The movement routes of the tagged fish were tracked within 2 hours approximately using VR100 receiver and a directional hydrophone. Three tagged fishes (CR1, CR2 and CR3) were individually released on the sea surface far away about 500 m from a construction site of wind power on the sea in the coastal of Byeonsan Peninsular on 9 May, 21 May and 18 August 2017, respectively. CR1 and CR2 were moved so fast and lost the signal from the acoustic tags within 8 and 12 minutes, respectively, after release. CR2 was released during piling work on 21 May 2017. CR1 and CR2 were released during without piling work. The water depth of the sea bed on the route of CR1 and CR2 were commonly 9.8 to 11.0 m. CR3 was moved about 4.32 km with average swimming speed of 0.58 m/s (1.69 TL/s) during 2.1 hours. The mean angle of the movement direction of RC2 was 291°, and the water depth on the route, 10.0 to 12.0 m. There was no significant correlationship (Pearson correlation, p= 0.447, p>= 0.05) between the tidal current direction and the movement direction of CR3.