检索结果-南通市图书馆

Intraspecific morphometric diversity of barramundi (Lates calcariferBloch, 1790) in the waters of southern Bangladesh

引用

Journal of Oceanology and Limnology 2019年第4期37卷 1393-1402页

作者： Md Reaz CHAKLADER Ashfaqun NAHAR Md Abu HANIF Muhammad A. B. SIDDIK school of Molecular and Life Sciences Curtin University Bentley 6102 Australia Department of Marine fisheries and Oceanography Patuakhali Science and Technology University Patuakhali 8602 Bangladesh Department of fisheries Biology and Genetics Patuakhali Science and Technology University Patuakhali 8602 Bangladesh

A total of 160 barramundi's (Lates calcarifer Bloch, 1790) sampled from four rivers (Tentulia, Balaswar, Bakkhali, and Andarmanik) along the southern coastal region of Bangladesh were investigated in terms of morphometric characters to reveal the intraspecific variation. Twenty-five morphometric measurements were extracted using the conventional method and subjected to multivariate analyses (i.e., principal component analysis (PCA), discriminate function analysis (DFA), cluster analysis (CA)) to distinguish individuals from different rivers. The result demonstrated that twenty-two out of 25 measurements was statistically significant (Univariate ANOVA) among all four populations. PCA analysis of morphometric characters resulted in two principal components, PC I and PCⅡ which accounted for 79.25% and 4.28% of the total data variance. PC I-PC Ⅱ plot explained 83.53% of total variance differentiated the population of L. calcarifer into two groups. Discriminate analysis correctly classified about 88.1% of the examined fish into the four areas. The UPGMA dendrogram showed that Bakkhali populations were the most morphologically different populations in comparison to other populations, while Andarmanik and Balaswar populations were very close to each other. The strong morphometric variation between Bakkhali and Tentulia, Andarmanik and Balaswar was observed in the present study, suggested the evidence of the separate stock population of barramundi in these locations, which might require distinct stock management strategies for resource sustainability in the waters of southern Bangladesh. However, if these findings are supported by further molecular markers and geometric morphometry, this would be a strong indication of different stocks of this population in the four rivers of southern Bangladesh.

关键词： intraspecific diversity morphometric characters stock structure Lates calcarifer Bangladesh

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Influence of Seasonal Changes and Headwaters on Physico-chemical Dynamics of Temengor Reservoir, Malaysia

引用

湿地科学 2011年第4期9卷 314-321页

作者： Zarul Hazrin Hashim Asmah Patiroi Mashhor Mansor Shahrul Anuar Md. Sah Donald C. Jackson school of Biological Sciences Universiti Sains Malaysia Department of Wildlife Fisheries and Aquaculture Mississippi State University

A study on physico-chemical dynamics of Temengor Reservoir was conducted to determine whether headwaters and seasonal changes play a major role in regulating physico-chemical dynamics of Temengor Reservoir. Temengor Reservoir receives water from its surrounding water catchments and headwaters. Then, the water flows into a series of hydroelectric dams, namely the Bersia, Kenering and Chenderoh dams. Generally, water quality in Temengor Reservoir can be classified as Class I. Physico-chemical trends showed that water quality in euphotic zone of Temengor Reservoir is stable and consistent. Two-way ANOVA analyses showed that seasonal variations only affected water temperature, Secchi disc's depth and nitrate-nitrogen. Based on Tukey's post-hoc test, all three headwaters in this study exert no influence to the reservoir's water quality. These insignificant differences were probably due to water temperature and the size of the headwaters and the reservoir itself. In situ parameters profiling showed that the epilimnion zone in Temengor Reservoir is from the surface to 6 m depth, the metalimnion zone is from 6 m to 12 m depth and the hypolimnion zone is from 12 m depth onwards to the bottom of the reservoir. Thus, continuous water profiling monitoring that covers high and low water levels need to be conducted to determine characteristics of the physico-chemical dynamics in the water column and also to analyse changes in reservoir layers. Through these studies, discontinuity trends in the Perak River could be determined and suggestions to the respective agencies could be made to conserve and to sustain downstream biodiversity.

关键词：湿地物理化学季节变化研究分析

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Behaviour of rainbow trout(Oncorhynchus mykiss) under defensible and indefensible patterns of food delivery

引用

Chinese Journal of Oceanology and Limnology 2010年第4期28卷 749-755页

作者： M.SAEED HEYDARNEJAD G.J.PURSER Aquaculture Sector Biology Dept.Faculty of ScienceShahrekord Uni. school of Aquaculture Tasmanian Aquaculture and Fisheries InstituteUniversity of Tasmania

The goal of this study was to investigate the behaviour of rainbow trout(n=30),Oncorhynchus mykiss,in small raceways when either self-feeders(T2) or hand-feeding(t2) were *** method of food delivery in T2 was defensible while that of t2 was *** in both raceways were subjected to restricted feeding(RF) for 25 *** was available in the morning(09:00-10:00) in the downstream area and in the afternoon(16:00-17:00) in the upstream area of the *** results showed that the behaviour of rainbow trout was significantly different under interference competition(T2) for food compared with that under scramble competition(t2).RF in T2 fish limited food availability to meal times when feeding rewards were available while t2 fish only responded to the location of food *** aggressive fish in T2 were dominant,and t2 fish at high densities showed intense social interactions under the indefensible pattern of food distribution;these interactions did not dampen to a minimum level to suppress the development of dominance ***,the stocking density did not break down the dominance hierarchies between the T2 *** suggests that decreased efficiency in the search for food or inefficient foraging,induced by interference competition at high densities,affected the behaviour of rainbow trout.

关键词： rainbow trout defensible and indefensible pattern of food delivery dominant

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Identification of global alternative splicing and sex-specific splicing via comparative transcriptome analysis of gonads of Chinese tongue sole(Cynoglossus semilaevis)

引用

Zoological Research 2022年第3期43卷 319-330页

作者： Yi-Fang Lu Qian Liu Kai-Qiang Liu Hong-Yan Wang Cheng-Hua Li Qian Wang Chang-Wei Shao school of Marine Sciences Ningbo UniversityNingboZhejiang 315211China Key Lab of Sustainable Development of Marine fisheries Ministry of AgricultureYellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdaoShandong 266071China Laboratory for Marine fisheries Science and Food Production Processes Pilot National Laboratory for Marine Science and TechnologyQingdaoShandong 266000China College of fisheries and Life Science Shanghai Ocean UniversityShanghai 201306China

Chinese tongue sole(Cynoglossus semilaevis)is an economically important marine fish species with a ZZ/ZW sex determination mechanism,which can be influenced by *** splicing(AS)is an important mechanism regulating the expression of genes related to sex determination and gonadal differentiation,but has rarely been reported in *** this study,to explore the molecular regulatory mechanisms of sex determination and gonadal differentiation,we combined isoform and RNA sequencing(Iso-Seq and RNA-Seq)to perform transcriptome profiling of male and female gonads in *** total,81883 and 32341 full-length transcripts were obtained in males and females,respectively.A total of 8279 AS genes were identified,including 2639 genes showing differential AS(DAS)between males and *** intersecting DAS genes and differentially expressed genes(DEGs)were enriched in the meiotic cell cycle pathway,and genes related to gonadal differentiation,such as esrrb and wt1a,were found to have sex-specific ***,this study revealed AS events in the gonadal transcriptomes of male and female ***,described the characteristics of active transcription in the testes,and identified candidate genes for studying the regulatory mechanisms of AS during gonadal differentiation.

关键词： Gonadal differentiation Alternative splicing Sex-specific splicing Cynoglossus semilaevis Iso-Seq RNA-Seq

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Multi-year assessment of paralytic shellfish toxins in hard clam species along the coastline of Jiangsu Province, China

引用

Acta Oceanologica Sinica 2019年第2期38卷 24-33页

作者： Xinzhi Wang Hao Wu Ying Cheng Hongmei Wen Rui Liu Libao Wang Chenxiao Shan Chuan Chai school of Pharmacy Nanjing University of Chinese Medicines Marine Drug Research and Development Center of Jiangsu Province Marine fisheries Research Institute of Jiangsu

Paralytic shellfish toxins(PSTs) are notorious neurotoxins that threaten public health and food safety *** PST monitoring programs have recently been established throughout China, the profiles and variation of PSTs in important commercial clams(e.g., Mactra veneriformis, Ruditapes philippinarum, and Meretrix meretrix) along the Jiangsu Province coastline remain largely unexplored. In this study, a validated hydrophilic interaction liquid chromatography–tandem mass spectrometry(HILIC-MS/MS) method was used to examine PST profiles and levels in 540 clam samples from natural production areas along Jiangsu Province coastline during2014–2016. Although the PST levels(≤6.38 μg saxitotoxin equivalents(eq)/kg) were consistently below European Union regulatory limits(≤800 μg saxitotoxin eq/kg) during this time period, saxitotoxin, decarbamoylsaxitotoxin,and gonyautoxins 1 and 4 were detected, and nearly 40% of the samples were saxitotoxin-positive. The PST levels also varied significantly by seasons, with peak values observed in May during 2014–2016. This is the first systematic report of PSTs in clams from Jiangsu Province, and additional research and protective measures are needed to ensure the safety of clams harvested in this area.

关键词： paralytic shellfish toxin HILIC-MS/MS clam seasonal variation Jiangsu Province

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Impact of dissolved organic matter on the photolysis of the ionizable antibiotic norfloxacin

引用

Journal of Environmental Sciences 2015年第1期27卷 115-123页

作者： Chen Liang Huimin Zhao Minjie Deng Xie Quan Shuo Chen Hua Wang Key Laboratory of Industrial Ecology and Environmental Engineering (MOE) School of Environmental Science and TechnologyDalian University of Technology College of fisheries and Life Science Dalian Ocean University

Norfloxacin（NOR）, an ionizable antibiotic frequently used in the aquaculture industry, has aroused public concern due to its persistence, bacterial resistance, and environmental ***, we investigated the photolysis of different species of NOR and the impact of a ubiquitous component of natural water — dissolved organic matter（DOM）, which has a special photochemical activity and normally acts as a sensitizer or inhibiter in the photolysis of diverse organics; furthermore, scavenging experiments combined with electron paramagnetic resonance（EPR） were performed to evaluate the transformation of NOR in water. The results demonstated that NOR underwent direct photolysis and self-sensitized photolysis via hydroxyl radical（U OH） and singlet oxygen（1O2） based on the scavenging experiments. In addition, DOM was found to influence the photolysis of different NOR species, and its impact was related to the concentration of DOM and type of NOR species. Photolysis of cationic NOR was photosensitized by DOM at low concentration, while zwitterionic and anionic NOR were photoinhibited by DOM, where quenching of U OH predominated according to EPR experiments, accompanied by possible participation of excited triplet-state NOR and1O2. Photo-intermediate identification of different NOR species in solutions with/without DOM indicated that NOR underwent different photodegradation pathways including dechlorination, cleavage of the piperazine side chain and photooxidation, and DOM had little impact on the distribution but influenced the concentration evolution of photolysis intermediates. The results implied that for accurate ecological risk assessment of emerging ionizable pollutants, the impact of DOM on the environmental photochemical behavior of all dissociated species should not be ignored.

关键词： Norfloxacin(NOR) Dissolved organic matters(DOM) Dissociated species Photolysis Aquaculture industry

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Involvement of Cbl-b-mediated macrophage inactivation in insulin resistance

引用

World Journal of Diabetes 2017年第3期8卷 97-103页

作者： Tomoki Abe Katsuya Hirasaka Takeshi Nikawa Department of Nutritional Physiology Institute of Biomedical Sciences Tokushima University Graduate School Graduate school of fisheries Science and Environmental Studies Nagasaki University

Aging and overnutrition cause obesity in rodents and humans. It is well-known that obesity causes various diseases by producing insulin resistance(IR). Macrophages infiltrate the adipose tissue(AT) of obese individuals and cause chronic low-level inflammation associated with IR. Macrophage infiltration is regulated by the chemokines that are released from hypertrophied adipocytes and the immune cells in AT. Saturated fatty acids are recognized by toll-like receptor 4(TLR4) and induce inflammatory responses in AT macrophages(ATMs). The inflammatory cytokines that are released from activated ATMs promote IR in peripheral organs, such as the liver, skeletal muscle and AT. Therefore, ATM activation is a therapeutic target for IR in obesity. The ubiquitin ligase Casitas b-lineage lymphoma-b(Cbl-b) appears to potently suppress macrophage migration and activation. Cbl-b is highly expressed in leukocytes and negatively regulates signals associated with migration and activation. Cbl-b deficiency enhances ATM accumulation and IR in aging- and diet-induced obese mice. Cbl-b inhibits migration-related signals and SFA-induced TLR4 signaling in ATMs. Thus, targeting Cbl-b may be a potential therapeutic strategy to reduce the IR induced by ATM activation. In this review, we summarize the regulatory functions of Cbl-b in ATMs.

关键词： Casitas b-lineage lymphoma-b Insulin resistance Macrophage Obesity Toll-like receptor 4

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Spatial Distribution Characteristics of Surface Tidal Currents in the Southwest of Taiwan Strait

引用

Journal of Ocean University of China 2014年第6期13卷 971-978页

作者： SHEN Zhiben WU Xiongbin LIN Hang CHEN Xiaofeng XU Xing’an LI Lun school of Electronic Information Wuhan University Wuhan Second Ship Design and Research Institute Fujian Provincial Department of Ocean and fisheries

This study was conducted on the spatial distribution characteristics of surface tidal currents in the southwestern Taiwan Strait based on the quasi-harmonic analysis of current data obtained by two high frequency surface wave radar(HFSWR) systems. The analysis shows that the tidal current pattern in the southwestern Taiwan Strait is primarily semi-diurnal and influenced significantly by shallow water constituents. The spatial distribution of tidal current ellipses of M2 is probably affected by the interaction between two different systems of tide wave, one from the northern mouth of Taiwan Strait and the other from the Bashi Channel. The directions of the major axes of M2 tidal current ellipses coincide roughly with the axis of the Taiwan Strait. The spatial distribution of the magnitudes of the probable maximum current velocity(PMCS) shows gradual increase of the velocity from northeast to southwest, which is in accordance with the spatial distribution of the measured maximum current velocity(MMCS). The directions of the residual currents are in accordance with the direction of the prevailing monsoon wind at the Taiwan Strait and the direction of the Taiwan warm current during summer. The bathymetry also shows a significant effect on the spatial distribution characteristics of tidal currents.

关键词： high frequency surface wave radar quasi-harmonic analysis spatial distribution characteristic surface tidal current Taiwan Strait

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Growth, Proximate Composition and Pigment Production of Tetraselmis chuii Cultured with Aquaculture Wastewater

引用

Journal of Ocean University of China 2018年第3期17卷 641-646页

作者： KHATOON Helena HARIS Haris RAHMAN Norazira Abdu ZAKARIA Mimi Nadzirah BEGUM Hasina MIAN Sohel Institute of Tropical Aquaculture Universiti Malaysia Terengganu Department of Aquaculture Chittagong Veterinary and Animal Sciences University Department of Aquatic Bioscience Graduate School of Agricultural and Life Science The University of Tokyo school of fisheries and Aquaculture Sciences Universiti Putra Malaysia Institute of Bioscience Universiti Putra Malaysia Department of fisheries Biology & Genetics Sylhet Agricultural University

Microalgae are cultured commercially as healthy food, cosmetic products, food preservatives, and a source of valuable compounds. However, the high cost of commercial culture medium is one of the challenges to microalgal production. Therefore, it is essential to find an alternative cost-effective culture medium. Aquaculture wastewater is considered as a highly potential candidate due to its high nutrient content and large quantity generated from the rapid growth of aquaculture sector. In this study, Tetraselmis chuii cultured in different media with or without wastewater was evaluated for its growth, proximate composition and carotenoid production. The results showed that significantly(P < 0.05) higher growth(4.3 × 105 cells mL^(-1)) and protein(56.4% dry weight), lipid(44% dry weight) and carbohydrate(20% of dry weight) contents were found in T. chuii when they were cultured in the combination of both wastewater and Conway(wastewater + Conway) medium. However, carotenoid production of T. chuii was significantly increased(P < 0.05) when it was cultured in wastewater only, followed by Conway + wastewater and Conway medium only. Therefore, the incorporation of wastewater with commercial medium Convey is recommended for a cost-effective microalgae culture, as well as for the enhancement of growth and nutritional content of microalgae.

关键词： wastewater growth proximate composition Tetraselmis chuii

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Gonad traits and age structure of the sea urchin Heliocidaris crassispina in central range:a comparison with rangeextenders

引用

海洋湖沼学报(英文) 2023年第5期41卷 1954-1964页

作者： Wenping FENG Daichi NAKANO Nobuyasu NAKABAYASHI Masakazu NAOKI Xiaofei TIAN Yukio AGATSUMA fisheries College Zhejiang Ocean UniversityZhoushan 316022China Graduate school of Agricultural Science Tohoku UniversitySendai 980-8572Japan Fukui Prefectural University Fukui 910-1195Japan Akita Prefectural Institute of fisheries Oga 010-8570Japan

The sea urchin Heliocidaris crassispina has northern expanded in geographic range to Toga Bay,Oga Peninsula in the Sea of Japan due to the global *** demonstrate the gonad traits and age structure of *** in the central range and compare the difference with those in northern extended range,we collected 100 *** individuals from a barren off Shitsumi,Fukui(central range),in August *** growth,gonad traits(size,development and color),and sex ratio were investigated and compared with those in Toga Bay,in August 2014(extended range).The successive 2012–2016 year classes of *** indicated successive juvenile recruitment in the central range,as found in the extended *** individuals at three years old in central range were obviously larger than those in the extended range,showing large test diameter and body weight,possibly due to the higher temperature in central range than that in northern extended *** addition,a balanced sex ratio in the central range was found,in contrast to the female-skewed sex ratio found in the extended *** development was sex-and *** testicular development in the central range was not only delayed in comparison to ovarian development,but also less delayed than those in the extended range,which possibly attribute to the higher water temperature in the central range.A significantly lower male gonad index and L*(lightness)value was recorded in central ranges compared to that in extended range,possibly due to the releasement of sperm of *** in central ranges.

关键词： Heliocidaris crassispina age gonad development gonad color range extension

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：