**9. Acknowledgements**

Author thanks the students and assistants from Marine Ecology and Conservation Laboratory at Institute of Marine Biology, National Taiwan Ocean University, Taiwan for their assistants in the field works. Author especially thanks Mr. George H. Balazs, from Pacific Islands Fisheries Science Center, National Marine Fisheries Services, NOAA, US for his selfless introduce into this field and provides all the necessary assistants. The telemetry studies in Taiwan were mainly supported by grants from National Science Council, Department of Forestry, Council of Agriculture and I-Mei Environmental Protection Foundation.
