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Consumer Preference and Consumption Pattern of marine fish Species in Ibadan Metropolis, Oyo State, Nigeria

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Journal of Agricultural Science and Technology(B) 2012年第7期2卷 835-840页

作者： Tosan B. Fregene Adeniyi S. Olanusi Department of Wildlife & fisheries Management University of lbadan Ibadan 90001 Nigeria

Despite the nutritive value of finfish, the domestic production is inadequate to meet the national demand. Due to the high demand of 2.66 million metric tons per annum for fish, Nigeria imported 740,000 tons in 2007 to supplement the domestic production of 615,507 tons. A study was conducted in Ibadan Metropolis of Oyo State （a land locked state） to determine the consumer preference and pattern of marine fish species consumed. Stratified sampling method was used to select respondents from three income earning levels of the five local government areas in Ibadan Metropolis. Questionnaires were administered to 51 marine fish retailers and 151 households. Data collected was analyzed using descriptive statistics and Tobit regression model. marine fish sellers ranked horse mackerel （Scomberjaponicus） first and croaker （Pseudotholithus species） the least because it is more priced. Only 10.6% and 13.2% of the households preferred express （Brevortia species） and croaker respectively, but Hake （Gadus gadus） was the least preferred （41.7%）. The household consumed varying proportions of fish species every week. The regression result （R2 = 0.65） showed that married household heads with large household size having lower years/level of education, younger in age and earning lower income are likely to consume more of marine frozen fish species （P 〈 0.01） than others.

关键词： marine fish consumer preference consumption pattern Nigeria.

Recent progress in the understanding of the gut microbiota of marine fishes

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marine Life Science & Technology 2021年第4期3卷 434-448页

作者： Weihao Ou Guijuan Yu Yanjiao Zhang Kangsen Mai The Key Laboratory of Aquaculture Nutrition and Feed(Ministry of Agriculture)and the Key Laboratory of Mariculture(Ministry of Education) Ocean University of ChinaQingdao 266003China Laboratory for marine fisheries Science and Food Production Processes Pilot National Laboratory for Marine Science and TechnologyQingdao 266237China

As the significance of the gut microbiota has become increasingly realized,a large number of related studies have *** respect to the gut microbial composition of fish,the predominant gut microbes and core gut microbiota have been reported by many *** understanding of fish gut microbiota,especially its functional roles,has fallen far behind that of terrestrial vertebrates,although previous studies using gnotobiotic zebrafish models have revealed that the gut microbiota performs a significant role in gut development,nutrient metabolism and immune *** that environmental factors of marine habitats are very different from those of freshwater habitats,a distinct difference may exist in the gut microbiota between freshwater and marine ***,this review aims to address the advances in marine fish gut microbiota in terms of methodologies,the gut microbial composition,and gnotobiotic models of marine fish,the important factors(host genotype and three environmental factors:temperature,salinity and diet)that drive marine fish gut microbiota,and significant roles of the gut microbiota in marine fish.

关键词： marine fish Gut microbiota Gnotobiotic Influence factors Gut microbial functions

Recent Advances in Population Genomics of marine fishes

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Agricultural Biotechnology 2017年第1期6卷 36-40,45页

作者： Ying LIU Shengyao QIU Denglai LI Ocean School Yantai UniversityYantai 264005China

In recent years, advances in high-throughput sequencing technique and capacity of big data analysis have facilitated genomics research in many species. Genome sequencing, single nucleotide polymorphism （SNPs） identification and population transcriptomics are conducive to understanding the evolutionary progress and regulatory mechanisms of genes related to adaptive traits in organisms, which poses great significance to the theoretical research and productive practice. Fur- thermore, population genomics of marine fishes can deepen the understanding of important microevolution events, such as genetic differentiation, hybridization and speciation. Therefore, the related research contributes to better understanding of the evolutionary process of marine organisms and provides theoretical evidences for the development of aquaculture industry and nmnagement and protection of marine fishery resources.

关键词： Population genomics marine fish Genetic structure SNPs

UPLC-Q-TOF MS分析海洋鱼类血清皮质醇

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分析测试学报 2007年第Z1期26卷 71-74页

作者：徐继林严小军王亚军尤仲杰李海英童玲宁波大学浙江省海洋生物工程重点实验室浙江宁波315211 宁波市海洋与渔业开发研究院浙江宁波315100

A sensitive analytical method on cortisol in marine fish serum was established using ultra performance liquid chromatography-quadrupole-time of flight mass spectrometry(UPLC-Q-TOF MS).The cortisol in marine fish serum was extracted with chloroform,dried under nitrogen gas,and solved in 1:1 methanol-H2O for analysis,with dexamethasone as internal *** mass spectrometry was performed in reflective time-of-flight using electron spraying ionization in negative mode,with m/z 407.2 for cortisol and 437.2 for dexamethasone,*** results showed efficient separation of cortisol and dexamethasone are achieved on BEH C18 *** linearity was good with the equation : Y=0.0154X+0.0451,from 0 to 200 ng/mL,with correlation coefficient of 0.999 3 and low detection limit of 1.64 *** average recovery was from 93.3% to 98.1%,with SD less than 10%.Using this method,corsitol in yellow croaker and Japanese sea bass collected in Ningbo China,were determined with content ranged from 0 to 15.81 ng/mL.

关键词： UPLC-Q-TOF-MS marine fish Serum Cortisol

Bioaccumulation and the expression of hepatic cytochrome P450 genes in marine medaka(Oryzias melastigma)exposed to difenoconazole

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Journal of Environmental Sciences 2017年第2期29卷 98-104页

作者： Lemeng Zhang Xiaocui Dong Chonggang Wang Zhenghong Zuo Meng Chen Key Laboratory of Ministry of Education for Subtropical Wetland Ecosystem Research Xiamen UniversityXiamen 361102China State Key Laboratory of marine Environmental Science Xiamen UniversityXiamen 361102China

This study was conducted to assess the effects of difenoconazole（DFZ）, a triazole fungicide,on the hepatic biotransformation system and its bioaccumulation in marine medaka（Oryzias melastigma）. fish were exposed to DFZ（1, 10, 100, 1000 ng/L） for 180 days. The results showed that：（1） The m RNA levels of hepatic CYP1A1, CYP1 B, CYP1C1, CYP27 B and CYP3A40 were up-regulated, but those of CYP3A38 and CYP27A1 were down-regulated.（2） The activity of ethoxyresorufin-O-deethylase（EROD） and the content of reduced glutathione（GSH） in the liver were increased in the DFZ-treated groups, and glutathione S-transferase（GST） activity was increased in the 100 and 1000 ng/L groups.（3） DFZ was accumulated in the muscle and the biological concentration factors in the 10, 100, and1000 ng/L groups were respectively 149, 81 and 25. These results suggested that long-term exposure to DFZ at low concentrations would result in a bioaccumulation of this compound and disturb the biotransformation system.

关键词： Pesticide Difenoconazole Biotransformation system marine fish

Mineral Uptake of Heavy Metals by Some marine Organisms along the Limbe Coastline in Cameroon and Health Risk Assessment

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Journal of Geoscience and Environment Protection 2022年第6期10卷 106-120页

作者： Jean Faustin Sabouang Roland Ndi Mbongko Lawan Loubou Mohamadou National Radiation Protection Agency Yaounde Cameroon Specialized Research Station for fisheries and Oceanography IRAD Limbe Cameroon

This study aimed at investigating the content of heavy metals in some marine organisms of the Cameroon Atlantic coast and assessing the health risk due to their consumption by the population. Nine fish and one shrimp species were collected for this study. These fish species were Ethmolosa fimbriata, Drepane africana, Dentex moroccanus, Arius latiscotatus, Scarus hoefleri, Cynoglossus browni, Sardinella madorensis, Pseudotolithus elongatus, Pseudotolithus typus. The shrimp species was Macrobranchium macrobranchium. The elements investigated in this study were: Fe, Co, Cu, Cd and Pb. For seven fish species it was found that the concentration of heavy metals followed the order Fe > Co > Cd > Cu > Pb. For most fish species the Target Hazard Quotient (THQ) value calculated showed the following trend Cd > Co > Pb > Fe ≥ Cu. Cadmium was found to be the main contributor to health risk that may result from the consumption of the fish species under study. The THQ for this element was in the range 0.7 - 1.2 while the Target Cancer Risk (TR) due to ingestion of this metal was in the range (3 × 10-4 - 6 × 10-4). These values are slightly above the threshold limits established for both carcinogenic and non carcinogenic risks by the United States, Environmental Protection Agency. The estimated weekly intake of cadmium due to consumption of some fishes under study was greater or equal to the Provisional Tolerable Weekly Intake (PTWI) determined by Food and Agriculture Organization/World Health Organization.

关键词： marine fish Heavy Metal Health Risk Target Hazard Quotient

Ascaridoid parasites infecting in the starry batfish Halieutaea stellata(Vahl)(Lophiiformes:Ogcocephalidae) from the East and South China Sea

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Ascaridoid parasites infecting in the starry batfish Halieut...

Survey on the presence of anisakid larvae in the cinnamon flounder Pseudorhombus cinnamoneus(Temminck & Schlegel)(Pleuronectiformes:Paralichthyidae)

中国畜牧兽医学会兽医寄生虫学分会第十三次学术研讨会

作者：李亮 Wen-Ting Zhao Yan-Ning Guo Lu-Ping Zhang Key Laboratory of Animal Physiology Biochemistry and Molecular Biology of Hebei ProvinceCollege of Life ScienceHebei Normal University

The starry batfish Halieutaea stellata(Vahl) is a small,benthic fish found in Indo-West Pacific ***,our present knowledge of the helminth parasites of this fish is still *** the present study,a total of 29 fish collected from the East and South China Sea,were examined to determine the prevalence,intensity,and species composition of nematode parasites in *** morphological and molecular approaches,four species of ascaridoid nematodes were found parasitic in this fish host,including the adults and fourth-stage larvae of Raphidascaroides nipponensis Yamaguti,1941,adults and third-stage larvae of Raphidascaris lophii(Wu,1949),third- and fourth-stage larvae of Hysterothylacium larval typeⅣ-A of Shamsi,Gasser & Beveridge,2013 and third-stage larvae of Hysterothylacium amoyense(Hs(u|¨),1933).Halieutaea stellata represents a new host record for the three last-named *** nipponensis with the highest prevalence(82.5%) and intensity(mean=13.5) of infection,was considered as the dominant parasite species in *** detailed morphology of the different developmental stages of the four nematode species was studied using light and scanning electron *** nematode species were also genetically characterized by sequencing and analysing the internal transcribed spacer(ITS) of the ribosomal *** present study provides further data on the occurrence of nematode parasites in *** and also contributes to facilitate an accurate and rapid diagnosis of the infection by these little-known nematodes.

关键词： Ascaridoidea integrated taxonomy Halieutaea stellata parasitic nematodes marine fish

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Survey on the presence of anisakid larvae in the cinnamon fl...

Morphological and molecular study of Longicollum pagrosomi Yamaguti, 1935(Acanthocephala:Pomphorhynchidae) from the barred knifejaw Oplegnathus fasciatus(Temminck & Schlegel) (Perciformes:Oplegnathidae) in the East China Sea

中国动物学会寄生虫学专业委员会第十届全国寄生虫学青年工...

作者： Jinyu Zhao Luping Zhang Huidong Ju Zhen Xu Liang Li Key Laboratory of Animal Physiology Biochemistry and Molecular Biology of Hebei Province College of Life Science Hebei Normal University

Anisakidosis is an important foodborne nematode disease of humans acquired from marine fish. The cinnamon flounder Pseudorhombus cinnamoneus is a frequently consumed marine fish in China. However, the occurrence of anisakid larvae in P. cinnamoneus remains unclear. This study investigated anisakid larvae infection in P. cinnamoneus caught from the Yellow Sea, China. Four anisakid species Anisakis pegreffii, Hysterothylacium aduncum, H. sinense and Raphidascaris lophii were detected in this important food fish using polymerase chain reaction-restriction fragment length polymorphism analysis(PCR-RFLP) and sequencing of the ribosomal internal transcribed spacer(ITS) region. The overall prevalence of infection is 100%. Hysterothylacium sinense was the predominant species accounting for 81.1% of all third-stage larvae examined in P. cinnamoneus. The prevalence and intensity of A. pegreffii and H. aduncum were also high(38/85 of fish infected with an intensity of 1–37 nematodes per fish in the former, 69/85 of fish infected with an intensity of 1–10 nematodes per fish in the latter). Phylogenetic analyses based on ITS sequences were performed to elucidate the genetic relationships of these anisakid nematodes obtained herein. The present study increases the knowledge of diagnosis and distribution of anisakid larvae in this area of Yellow Sea. The high level of anisakid larvae infection in P. cinnamoneus, indicates the presence of high risk of human anisakidosis for the people who prefer eating raw or undercooked P. cinnamoneus.

关键词： anisakidosis Anisakidae marine fish ITS rDNA PCR-RFLP

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Morphological and molecular study of Longicollum pagrosomi Y...