Abstract: Based on the survey data of fishery resources in the Jiaojiang Estuary in spring (April) and autumn (October), 2010, this paper analyzed the distribution patterns of the shrimps in the Estuary in spring and autumn and the effects of water temperature, salinity, and depth on these distribution patterns. In spring and autumn, the average weight density of the shrimps was 7.89 and 86.20 kg·km^-2, and the average number density was 11.04×10³ and 34.41×10³ ind·km^-2, respectively. In spring, the weight density was higher in the west than in the east area, but the number density was in opposite. In autumn, both the weight density and the number density were obviously higher in the east than in the west area. The shrimps in spring had the highest weight density at the coastal area of the Estuary, especially in the northwest area where the water was affected by the runoff of Jiaojiang River; whereas the shrimps in autumn had the highest weight density in the southeast area where the water was affected by the Taiwan Warm Current. The stepwise regression analysis showed that the shrimps weight density and number density were significantly correlated with surface water temperature (P_W = 0.004, P_N = 0.01), but less correlated with water salinity and depth. In spring, Acetes chinensis had the greatest contribution to the shrimp number density, and had greater contribution to the shrimp weight density, being the most dominant shrimp species. In autumn, Solenocera crassicornis had the highest contribution to both the weight density and the number density of the shrimps, being the most dominant species.

Key words: photosynthetic characteristics, photosynthetic pigment content, light quality, chlorophyll fluorescence., tomato