Biological characteristics, temporal-spatial distribution of Portunus trituberculatus and relationships between its density and impact factors in Laizhou Bay, Bohai Sea, China.

doi:10.13287/j.1001-9332.201606.017

Abstract

Abstract: Biological characteristics, density and its spatial distribution of Portunus trituberculatus in Laizhou Bay, together with the impact of environmental factors, were analyzed based on the bottom trawl data of 9 surveys from May 2011 to April 2012, in order to provide scientific basis for utilizing and protecting the resource of P. trituberculatus. The monthly variation of biomass density could be described as September > October > July > August > June > November > March > May > April. The average values were highest in August 2011 and lowest in April 2012, for body mass, width and length, respectively. The individual fatness coefficient was highest in August 2011 both for the female (1.030) and the male (1.023), lowest in July both for the female (1.007) and the male (1.007). The difference of fatness coefficient was not significant (P>0.05) between the female and the male. The sex ratio (female/male) was less than 1.0 in most of all months except June, July and August. P. trituberculatus was mainly distributed in the Yellow River estuary and the offshore off Longkou in May-July, in offshore off Weifang and Longkou in August-September, and in deep-water area of the Laizhou Bay mouth from October to next April. Pearson correlation analysis indicated that environmental factors that best matched the density of P. trituberculatus were sea surface temperature (SST), dissolved oxygen (DO) and water depth (Dep), followed by salinity (Sal) and zooplankton density, the last were phytoplankton density and the number of other demersal fisheries species. The body length of P. trituberculatus in 2011 was significantly smaller (P<0.01) compared with that in 1981. To sustainably utilize the resource of P. trituberculatus in Laizhou Bay, we suggested that the fishing effort should be reduced, the catchable size should be raised, the research of enhancement basements should be promoted and more reasonable releasing quantity should be proposed.

WU Qiang, WANG Jun, CHEN Rui-sheng, HUANG Jing-xian, ZUO Tao, LUAN Qing-shan, JIN Xian-shi. Biological characteristics, temporal-spatial distribution of Portunus trituberculatus and relationships between its density and impact factors in Laizhou Bay, Bohai Sea, China.[J]. Chinese Journal of Applied Ecology, 2016, 27(6): 1993-2001.

References

[1] Jin XS, Tang QS. Changes in fish species diversity and dominant species composition in the Yellow Sea. Fishe-ries Research, 1996, 26: 337-352
[2] Xu BD, Jin XS. Variations in fish community structure during winter in the southern Yellow Sea over the period 1985-2002. Fisheries Research, 2005, 71: 79-91
[3] Jin XS. Long-term changes in fish community structure in the Bohai Sea, China. Estuarine, Coastal and Shelf Science, 2004, 59: 163-171
[4] Liu Z-L (刘尊雷),Yuan X-W (袁兴伟),Yang L-L (杨林林), et al. Effect of climate change on the fishe-ries community pattern in the overwintering ground of open waters of northern East China Sea. Chinese Journal of Applied Ecology (应用生态学报), 2015, 26(3): 901-911 (in Chinese)
[5] Chen Z-Z (陈作志), Qiu Y-S (邱永松), Jia X-P (贾晓平), et al. Effects of fishing on the marine ecosystem of Beibu Gulf. Chinese Journal of Applied Ecology (应用生态学报), 2008, 19(7): 1604-1610 (in Chinese)
[6] Rice J, Gislason H. Patterns of changes in the size spectra of numbers and diversity of the North Sea fish assemblage, as reflected in surveys and models. ICES Journal of Marine Science, 1996, 53: 1214-1225
[7] Rijnsdorp AD, Leeuwen PIV, Daan N, et al. Changes in abundance of demersal fish species in the North Sea between 1906-1909 and 1990-1995. ICES Journal of Marine Science, 1996, 53: 1054-1062
[8] Gislason H, Rice J. Modelling the response of size and diversity spectra of fish assemblages to changes in exploitation. ICES Journal of Marine Science, 1998, 55: 362-370
[9] Shan X-J (单秀娟), Jin X-S (金显仕), Li Z-Y (李忠义), et al. Fish community structure and stock dynamics of main releasing fish species in the Bohai Sea. Progress in Fishery Sciences (渔业科学进展), 2012, 33 (6): 1-9 (in Chinese)
[10] Jin XS, Shan XJ, Li XS, et al. Long-term changes in the fishery ecosystem structure of Laizhou Bay, China. Science China Earth Sciences, 2013, 56: 366-374
[11] Zhang B (张波), Jin X-S (金显仕), Wu Q (吴强), et al. Enhancement and release of Chinese shrimp in Laizhou Bay. Journal of Fishery Sciences of China (中国水产科学), 2015, 22(3): 361-370 (in Chinese)
[12] Dai A-Y (戴爱云), Yang S-Q (杨思琼), Song Y-Z(宋玉枝), et al. China Marine Crab. Beijing: Ocean Press, 1986 (in Chinese)
[13] Xie Z-Q (谢周全), Qiu S-Y (邱盛尧), Hou C-W (侯朝伟), et al. Recapture rates of swimming crabs (Portunus trituberculatus) released in the waters off southern Shandong Peninsula. Journal of Fishery Sciences of China (中国水产科学), 2014, 21(5): 1000-1009 (in Chinese)
[14] Chen D-G (陈大刚), Shen W-Q (沈谓铨), Liu Q (刘群), et al. The geographical characteristics and fish species diversity in the Laizhou Bay and Yellow Ri-ver estuary. Journal of Fishery Sciences of China (中国水产科学), 2000, 7(3): 46-52 (in Chinese)
[15] Jin X-S (金显仕), Deng J-Y (邓景耀). Variations in community structure of fishery resources and biodiversity in the Laizhou Bay. Chinese Biodiversity (生物多样性), 2000, 8(1): 65-72 (in Chinese)
[16] Luo XX, Zhang SS, Yang JQ, et al. Macrobenthic community in the Xiaoqing River Estuary in Laizhou Bay. Journal of Ocean University of China, 2013, 12: 366-372
[17] Shan XJ, Sun PF, Jin XS, et al. Long-term changes in fish assemblage structure in the Yellow River estuary ecosystem, China. Marine and Coastal Fisheries: Dyna-mics, Management, and Ecosystem Science, 2013, 5: 65-78
[18] Zhai L (翟璐), Xu B-D (徐宾铎), Ji Y-P (纪毓鹏), et al. Spatial pattern of fish assemblage and the relationship with environmental factors in Yellow River Estuary and its adjacent waters in summer. Chinese Journal of Applied Ecology (应用生态学报), 2015, 26(9): 2852-2858 (in Chinese)
[19] Li F (李凡), Lv Z-B (吕振波), Wei Z-H (魏振华), et al. Seasonal changes in the community structure of the demersal fishery in Laizhou Bay. Journal of Fishery Sciences of China (中国水产科学), 2013, 2(1): 137-147 (in Chinese)
[20] Lin Q (林群), Wang J (王俊), Li Z-Y (李忠义), et al. Assessment of ecosystem energy flow and carrying capacity of swimming crab enhancement in the Yellow River estuary and adjacent waters. Chinese Journal of Applied Ecology (应用生态学报), 2015, 26 (11): 3525-3531 (in Chinese)
[21] Wu Q (吴强), Chen R-S (陈瑞盛), Huang J-X (黄经献), et al. Fishery biology characteristics, temporal and spatial distribution of Oratosquilla oratoria in Laizhou Bay, Bohai Sea. Journal of Fisheries of China (水产学报), 2015, 39(8): 1166-1177 (in Chinese)
[22] Gao B-Q (高宝全), Liu P (刘萍), Li J (李健), et al. A Preliminary study on relative fatness of Portunus trituberculatus. Periodical of Ocean University of China (中国海洋大学学报), 2012, 42(suppl.): 51-53 (in Chinese)
[23] Dai A-Y (戴爱云), Feng Z-Q (冯钟琪), Song Y-Z (宋玉枝), et al. Preliminary investigation of fishery biological characteristics of Portunus trituberculatus. Chinese Journal of Zoology (动物学杂志), 1977(2): 30-33 (in Chinese)
[24] Deng J-Y (邓景耀), Kang Y-D (康元德), Zhu J-S (朱金声), et al. The biology of the blue crab in the Bohai Sea// The Chinese Crustacean Society. Transactions of the Chinese Crustacean Society No. I. Beijing: Science Press, 1986: 77-85 (in Chinese)
[25] Wu Q (吴强), Jin X-S (金显仕), Luan Q-S (栾青杉), et al. Analysis on the reproduction of Penaeus chinensis and Portunus trituberculatus based on their food sources and predators in the Laizhou Bay of China. Progress in Fishery Sciences (渔业科学进展), 2016, 37(2): 1-9 (in Chinese)
[26] Cheng G-B (程国宝), Shi H-L (史会来), Mao G-M (毛国民), et al. Biological characteristics and artificial propagation, culture technique for Portunus trituberculatus. Hebei Fisheries (河北渔业), 2012(4): 59-61 (in Chinese)
[27] Zhang G (张贵). Effect of Dissolved Oxygen, Salinity, Ammonia-N and Nitrite-N on the Survival and Food Intake of Portunus trituberculatus. Master Thesis. Zhanjiang: Guangdong Ocean University, 2012 (in Chinese)
[28] Sun R-Y (孙儒泳), Li Q-F (李庆芬), Niu C-J (牛翠娟), et al. Basic Ecology. Beijing: Higher Education Press, 2002 (in Chinese)
[29] Shi Q (石强). Climate response and spatial-temporal model on the inter-annual change of temperature-salinity in the Bohai Sea during winter. Marine Science Bulletin (海洋通报), 2013, 32(5): 505-513 (in Chinese)