A. Bottom trawl fisheryThe CPUEs of the northern area of southwestern waters of Taiwan (G, H, I, J and K) is more than 19.6 kg/hr, but those of the southern area are no more than 9.1 kg/hr except the area D which is 19.3 kg/hr. The percentage of trash fish weight in the landing is most high in the area E and H (73.3%), and the other area are between 8.3-54.5%. Pieces are the most dominant taxonomic group in the landing of bottom trawl fisheries. Mostly pieces occupied more than 80% of wet weight in the landings. The second dominant group is shrimps, however only the percentage of shrimp wet weight is more than 14.9% in the area D, B and J. 9%, and mostly this group are no more than 2% in the landings. The other groups are also no more than 3% in the landings except area I where cephalopod occupied 7.6% in the landings. Pennahia macrocophalus and Johnius spp. are mostly landing at the depth shallower than 120 m depth, but Atrobucca nibe is mostly landing at the depth deeper than 100 m depth. Psenopsis anomala is mostly landing at the northern area, and Trichiurus lepturus is landing evenly in all area. Saurida elongata are mostly landing at the depth shallower than 200 m depth, and Cephalopod, Sepia esculenta and Loligo edulis, are mostly landing at the southern area.B. Sergestid shrimp fishery This report included the analysis on the fishing condition based on the catch statistics collected from 16 sampling vessels and fish market during the period from November 2006 to May 2007. Meanwhile, the analysis on the biological characters of sergestid shrimp based on the sampling data was conducted during the period from November 2006 to October 2007. The average fishing time was 1.70 hours with a CPUE of 19.35 kg per net haul. The species composition included sergestid shrimp (38.39%), myctophid fishes (37.22%), and the other fishes (24.39%). The annual landing of sergestid shrimp in the fish market was 562.40 tonnage with a value of 21,328 ten thousand N.T. dollars. The productivity in the coastal area off Fan-Shan was higher than the coastal area off Tung-Kang. The monthly ratio of female shrimp was between 31.95% and 88.95% with a peak in March. The length-weight regression equations of the female and male shrimp were calculated as BW=2x10-5BL2.7510，r=0.879 for female, and BW=3x10-5BL2.5958，r=0.875 for male.