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Relationship Between the Spatiotemporal Distribution of Dominant small pelagic fishes and Environmental Factors in Mauritanian Waters

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Journal of Ocean University of China 2020年第2期19卷 393-408页

作者： EBANGO NGANDO Narcisse SONG Liming CUI Hongxing XU Shuangquan College of Marine Sciences Shanghai Ocean UniversityShanghai 201306China National Engineering Research Center for Oceanic fisheries Shanghai Ocean UniversityShanghai 201306China The Key Laboratory of Sustainable Exploitation of Oceanic fisheries Resources Ministry of EducationShanghai Ocean UniversityShanghai 201306China Collaboration Innovation Center for National Distant-Water fisheries Shanghai 201306China

The relationship between the spatiotemporal distribution of three dominant small pelagic fishes,including chub mackerel(Scomber japonicus),horse mackerel(Trachurus trecae)and round sardinella(Sardinella aurita),and the environmental factors in Mauritanian waters were analyzed by using 4 years of logbook data of commercial purse seine fisheries to improve the efficiency of fishery and management of sustainable exploitation.A Tweedie-generalized additive model(GAM)of 8-day average catches and the monthly geostatistical analysis of daily catches were used in this study to analyze the influence of environmental factors on catch per unit of effort(CPUEs)and to map the spatial distribution of three mixed dominant small pelagic fishes,respectively.A 10'×10' grid was used,and environmental factors were processed from remote sensing,including 8-day average sea surface temperature(SST),the nearest distance between SST fronts and CPUE position(Df),chlorophyll-a(Chl-a)concentration,salinity,and eddy kinetic *** showed that 1)the distribution of three dominant small pelagic fishes might be related to the intensity of upwelling in Mauritanian waters;2)oceanic fronts might play a key role in the ecology of chub mackerel,horse mackerel,and round sardinella;3)Chl-a concentration might be associated with the feeding grounds of chub mackerel;4)the target species distribution appeared sensitive to gradient changes in the amount of salinity;5)three zones(northern,central,and southern)with variable abundances were delineated;and 6)a high concentration of the center of gravity in the central zone might be related to the strong upwelling of nutrient-rich *** study can provide new insights to enhance the fishery efficiency and sustainable exploitation management of purse seiners in certain area off Mauritania.

关键词： aggregation environmental factors small pelagic fish light purse seiner Mauritanian waters

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Characterization of refined fish oil from small fish in Mauritania

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Aquaculture and fisheries 2022年第6期7卷 639-646页

作者： Xuebing Zhang Liu Lin Zhuanxia Chen Jing Zhang Xichang Wang Ningping Tao College of Food Science and Technology Shanghai Ocean UniversityShanghai201306China Shanghai Engineering Research Center of Aquatic-Product Processing&Preservation Shanghai201306China National R&D Branch Center for Freshwater Aquatic Products Processing Technology Shanghai201306China

In this study,the effects of chemical refining on the physicochemical indices,environmental pollutants,lipid functional groups,relaxation characteristics,fatty acid profiles,and triglyceride(TG)molecular species in crude oil extracted from small fish in Mauritania were *** acid,peroxide,and iodine values of crude oil were identified as 5.52 mg KOH/g,1.73 meq/kg,and 200.78 g/100 g oil,*** refining,these values were determined to be 0.29 mg KOH/g,0.76 meq/kg,and 210.80 g/100 g oil,*** polychlorinated biphenyls and arsenic content of crude oil were identified as 32.30μg/kg and 1.00 mg/kg,*** refining,these were not *** content of eicosapentaenoic acid(EPA)and docosahexaenoic acid(DHA)accounted for as much as 87.55%of the polyunsaturated fatty acids in the refined oil,indicating that high-quality fish oil is suitable as a food *** correlation coefficient of the infrared spectra before and after refining was 0.968,and the relaxation time and peak shape data were almost similar before and after ***,there were no significant differences(P≥0.05)in fatty acid profiles between the crude and refined oils,except for C16:0(Pfish oil.

关键词： ω-3 PUFAs Crude fish oil fish oil refinement Triglyceride molecular species Mauritania Sea small pelagic fish

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