| 英文摘要 |
The trade-off between resource conservation and industrial development plays a key role on the management measures for sustainable development of marine fishery. To understand population structure and population dynamics of the target species is substantial to propose adaptive management approach. The precious coral fishery of Taiwan faces a dilemma between resource conservation and fisheries management. To establish the basic information on fishery biology and fisheries catch data is critical and essential for a sustainable precious coral fishery. In this study, we preliminarily investigate the activities of fishing vessel of precious coral fishery in Taiwan by analysing the Voyage Data Recorder (VDR) data. Besides, we attempt to structure a steady sampling approach, to process species identification and morphometric measurements. Two working groups were involved to approach these objectives.
A. Fishery data
This study investigate the fishing activities of 31 fishing vessels of precious coral fishery in Taiwan from 1 January 2007 to 31 July 2008. The average number of vessel operated per day was 10 (S.D. = 6.2) with the maximum number of 27 vessels. The major operation season occurred in May-July, September-October and December. During studied period, the trips of each vessel ranged 2-30 trips. The operation days of each trip ranged 1-46 days, with an average of 9.5 (S.D. = 7.5) days and mode at 9 days. The operation days of each trip for CT4 vessels were significantly longer than those of CT3 vessels (CT4: 10.6 days, CT3: 7.9 days). Most of the operating vessels located in regions of the designated fishing grounds (DFG) (79.4%). Among the DFGs, DFG-A and DFG-B are the major fishing grounds, accounted for 91.0% of fishing activities. The operations in DFG-A occurred in spring, while operations in DFG-C and DFG-D occurred in winter. The fishing activities of precious coral fishery were similar to the mine exploitation, i.e., no seasonal variation of target species could be followed, while depended on environmental factors (climate) and human society factors (holidays).
B. Biological data
In this study, we reviewed the literatures published in the scientific journals with keyword of precious coral, red coral, Corallium, etc. Most of the studies were published by the scholars of countries around the Mediterranean. We also collected the related fisheries management measures for these countries from available information on the websites. The papers suggested that red coral is a kind of long-lived, late matured and slow growth rate marine resources. The rigid management measures are necessary when such species under exploitation. China requested CITES to list the Corallium spp. in the appendix III on 1 July 2007. The species targeted by precious coral fishery in Taiwan are Corallium japonicum (Aka), C. elatius (Momo,) C. konojoi (White), and C. secundum (Midway). More data and studies are necessary to understand the population ecology of the species exploited by precious coral fishery in Taiwan. |