Preliminary study on homing,site fidelity,and diel movement of black rockfish <Emphasis Type="Italic">Sebastes inermis</Emphasis> measured by acoustic telemetry |
| |
| Authors: | Hiromichi Mitamura Keiichi Uchida Yoshinori Miyamoto Nobuaki Arai Toshiharu Kakihara Takashi Yokota Junichi Okuyama Yuuki Kawabata Tohya Yasuda |
| |
| Institution: | (1) Graduate School of Informatics, Kyoto University, Kyoto 606-8501, Japan;(2) Department of Ocean Science, Faculty of Marine Science, Tokyo University of Marine Science and Technology, Minato Tokyo, 108-8477, Japan;(3) Present address: Graduate School of Agriculture, Kinki University, Nakamachi 3327-204, Nara 631-8505, Japan |
| |
| Abstract: | Several species of fish exhibit strong homing ability and distinct site fidelity to their original habitats and spawning sites.
We have studied the homing ability, site fidelity, and diel movement patterns of three nocturnal black rockfish Sebastes inermis. The patterns were studied by radio-linked acoustic positioning system (VRAP) and fixed monitoring receivers (VR2) in Maizuru
Bay, Japan from June to July 2004. All tagged fish were displaced by 80–120 m, but they returned to their respective captured
sites at dusk, regardless of the time of release. The fish tagged with a depth sensor transmitter displayed active vertical
movement just after the release, and subsequently swam near the bottom depth around the captured site. After homing, they
displayed small home ranges average 815 ± 265 m2 (SD)] around a single rocky area with one or two core areas (average 64 ± 30 m2). One core area was utilized during the daylight and dark periods, whereas the other was used primarily during the dark period.
The depth-tagged fish primarily used the depth of the rock crevice during the daylight, and it spent its dark period between
the surface and the deeper bottom depth. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
