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Impact of Human Activity on Marine and Coastal Environment in the Gulf of Tadjourah 人类活动对塔久拉湾海洋和海岸环境的影响
Pub Date : 2015-07-14 DOI: 10.4172/2155-9910.1000162
M. OsmanAwaleh, Hoch Fb, Okieh Bh, Ahmed Si, Y. D. Soubaneh, M. Badran
Extensive research with the aim of establishing seawater quality monitoring is considered essential of any integrated coastal management program. The present study reports for the first time the republic of Djibouti costal water quality. The state of the sixteen stations’ seawater quality was assessed on the basis of determination of temporal and spatial variability of inorganic nutrients with physicochemical variables. The samples were collected seasonally from different areas such as harbor and important touristic area in the Gulf of Tadjourah for three years (2008, 2009 and 2012). The seawater temperatures, pH or Chlorophyll a of sampling sites were evaluated and compared to those of the Gulf of Tadjourah or Red Sea waters. Relatively high concentrations of nutrients (for some sites) and very low chlorophyll a concentrations (0.006 to 0.06 μg.l-1) were observed at sampling sites. The seawater concentrations of trace metals in ten stations across the Doraleh coast, where is located the main port of Djibouti, were also investigated in 20012 and the values were compared to the normal range of concentrations for seawater. The levels of microbial concentrations were also determined for the main beaches of Djibouti-city and showed relatively higher concentrations for stations beaches close to sewage outfall.
以建立海水质量监测为目的的广泛研究被认为是任何综合海岸管理计划的必要条件。本研究首次报道了吉布提共和国沿海水质。利用理化变量测定海水中无机养分的时空变异性,对16个站点的海水水质状况进行了评价。样本是在Tadjourah海湾的港口和重要旅游区等不同区域季节性采集的,采集时间为2008年、2009年和2012年。对采样点的海水温度、pH值和叶绿素a进行了评价,并与塔杰拉湾和红海的海水进行了比较。在采样点观察到相对高浓度的营养物质(在某些地点)和非常低的叶绿素a浓度(0.006至0.06 μg.l-1)。2012年还调查了位于吉布提主要港口的Doraleh海岸10个站点的海水痕量金属浓度,并将这些值与海水浓度的正常范围进行了比较。还确定了吉布提市主要海滩的微生物浓度水平,并显示靠近污水排放口的站点海滩的微生物浓度相对较高。
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引用次数: 5
Assessment of Heavy Metals in Some Marine Fish Species Relevant to their Concentration in Water and Sediment from Coastal Waters of Ondo State, Nigeria 与尼日利亚翁多州沿海水域水和沉积物中重金属浓度相关的某些海洋鱼类重金属评估
Pub Date : 2015-06-30 DOI: 10.4172/2155-9910.1000163
Olusola Jo, Festus Aa
Due to oil exploration activities and urbanization as well as continuous industrial and agricultural growth in Ondo State, Nigeria. The coastal water has been heavily impacted by a number of pollutants originating from different sources including heavy metals. This investigation assessed and monitored accumulation levels of ( Cr, Cd, Pb, Cu, Zn, and Ni ) in different organs ( Gill, Head, Bone, Muscle and Eye ) of five fish species (Pentanemus quinquarius, Pseudoltolithus senegalensis, Trichirus lepturus, Plectorhynchus meditarraneus and Pseudotolithus typus together with water and sediment collected from the ocean shoreline in the coastal waters of Ondo State, Nigeria. Heavy metals concentrations in fish tissues, water and sediment samples were analyzed after treatment using atomic absorption spectrophotometer. Dissolve total metal in water (in mg/l) Zn 0.12-0.22 , Cu 0.26-0.27 and Ni BDL-0.01 recorded in the water samples in this study were low and within the maximum permissible level (MPL) recommended by WHO and USEPA, while higher concentrations above the MPL were recorded for Cr 0.31-0.34 Cd 0.08 -0.21 and Pb 0.57-0.79. The concentrations of these metals in sediment in (mg/kg) were in the range Cr (0.16-4.19, Cd 0.35-0.38, Pb 0.9-1.00, Cu 0.24-1.44, Zn 2.12-3.11 and Ni BDL-0.01. They are all lower than their probable effect concentrations (PEC) in sediment. Mean Concentrations of the heavy metals in fish species were of the order: Zn>Cu>Cr>Cd>Pb>Ni. Levels of heavy metals varied depending on different tissues in the fish species. Correspondingly, high concentrations of the metals were found in gills and eye compared to other tissues. While the concentration of Zn (0.34 mg/kg-1.29 mg/kg), Cu (BDL-1.88 mg/kg), Ni (BDL-0.01 mg/kg) , and Cr (BDL-1.28) in the fish tissues were within the maximum allowable level (MAL) for a food source, the findings of this study shows higher value above the allowable limit for Cd(BDL-1.14 mg/kg) and Pb (BDL-0.71 mg/kg), thus constituting potential health hazard to consumers of these fish species.
由于石油勘探活动和城市化以及尼日利亚翁多州工业和农业的持续增长。沿海水域受到来自不同来源的污染物的严重影响,包括重金属。本研究评估和监测了五种鱼类(五尾拟鱼、塞内加尔拟鱼、leptrhirus、地中海拟鱼和typus)在不同器官(鳃、头、骨、肌和眼)中(Cr、Cd、Pb、Cu、Zn和Ni)的积累水平,以及从尼日利亚Ondo州沿海水域海洋岸线收集的水和沉积物。采用原子吸收分光光度计对处理后的鱼组织、水和沉积物样品中的重金属浓度进行了分析。本研究水样中溶解在水中的总金属(mg/l) Zn 0.12 ~ 0.22、Cu 0.26 ~ 0.27、Ni BDL-0.01均处于WHO和USEPA推荐的最大允许水平(MPL)内,而Cr 0.31 ~ 0.34、Cd 0.08 ~ 0.21、Pb 0.57 ~ 0.79均高于MPL。这些金属在沉积物中的浓度(mg/kg)分别为Cr(0.16 ~ 4.19)、Cd(0.35 ~ 0.38)、Pb(0.9 ~ 1.00)、Cu(0.24 ~ 1.44)、Zn(2.12 ~ 3.11)和Ni (bdl ~ 0.01)。它们都低于它们在沉积物中的可能效应浓度(PEC)。鱼类中重金属的平均浓度顺序为:Zn>Cu>Cr>Cd>Pb>Ni。重金属含量因鱼类的不同组织而异。相应地,与其他组织相比,在鳃和眼睛中发现了高浓度的金属。鱼类组织中锌(0.34 mg/kg-1.29 mg/kg)、铜(BDL-1.88 mg/kg)、镍(BDL-0.01 mg/kg)和铬(BDL-1.28 mg/kg)的浓度均在食物来源的最大允许水平(MAL)内,但本研究结果显示,镉(BDL-1.14 mg/kg)和铅(BDL-0.71 mg/kg)的浓度高于允许限量,对这些鱼类的消费者构成潜在的健康危害。
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引用次数: 28
Universal Primers for Exon-Priming Intron-Crossing (EPIC) PCR on RibosomalProtein Genes in Marine Animals 海洋动物核糖体蛋白基因外显子引物内含子交叉PCR (EPIC)通用引物
Pub Date : 2015-05-25 DOI: 10.4172/2155-9910.1000160
S. Chow, T. Yanagimoto, Yoji Nakamura
Relatively conserved exon sequences among distant aquatic animal taxa (Copepoda, Echinodermata, and Teleostei) were determined for 12 ribosomal protein genes, and 19 primer pairs were designed for an exon-primed intron-crossing polymerase chain reaction strategy. The universal utility of these primers was evaluated in distant animal species (sea urchin, squid, crab, shark, and tuna). Fragment amplification was confirmed for at least three species for all primer pairs, and single fragment amplification was observed for at least one species in 16 primer pairs. Primer sets presented here may serve as an initial step for isolating single-copy nuclear DNA sequences in a wide variety of marine animals.
测定了12个核糖体蛋白基因在远缘水生动物类群(桡足类、棘皮类和遥骨类)中相对保守的外显子序列,设计了19对引物,用于外显子引物的内含子交叉聚合酶链反应策略。这些引物在遥远动物物种(海胆、鱿鱼、螃蟹、鲨鱼和金枪鱼)中的普遍效用进行了评估。所有引物对中至少有3个物种存在片段扩增,16对引物中至少有1个物种存在单片段扩增。这里介绍的引物集可以作为分离各种海洋动物的单拷贝核DNA序列的第一步。
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引用次数: 3
Effects of Cadmium Exposure on Reproduction and Survival of the Planktonic Copepod Centropages ponticus 镉暴露对浮游桡足动物繁殖和存活的影响
Pub Date : 2015-04-27 DOI: 10.4172/2155-9910.1000159
E. Pringault
Heavy metal pollution is a growing environmental problem in marine coastal waters; for this reason the monitoring of water pollution needs the availability of test-species able to furnish reliable and cheap results. From this point of view, copepods are important test organisms owing to their wide distribution and for their key-position within the food web. As Centropages ponticus seems to be a promising target-species in ecotoxicology. The present study assesses the toxic effects of cadmium (Cd) on survival and reproductive performance of C. ponticus. A microcosm experiment was carried out for this study. Copepods were exposed to cadmium that ranged in concentration from 0.1 to 200 µg Cd.L-1 and effects were examined after 24 hours. The results show that treatments with cadmium significantly affect survival in copepods at concentration equal or above 0.2 μg.L−1. In order to assess sublethal effects of cadmium on reproduction; the test organisms were exposed to four nominal Cd concentrations 0, 0.2, 0.4, 1 µg.L-1. The results indicated that egg production decreased with the increase of metal concentration. An increase of the Cd concentration reduced the number of hatched nauplii. Thus, survival and reproduction in C. ponticus as a model test species could be effective physiological markers to monitor marine metal pollution.
重金属污染是海洋近岸水域日益突出的环境问题;因此,水污染监测需要能够提供可靠和廉价结果的试验物种。从这个角度来看,桡足类动物是重要的试验生物,因为它们分布广泛,在食物网中处于关键地位。在生态毒理学研究中,竹心虫是一种很有前途的靶种。本文研究了镉(Cd)对黄颡鱼(c.p onticus)生存和繁殖性能的毒性影响。本研究进行了微观实验。桡足类动物暴露于浓度为0.1 ~ 200µg Cd.L-1的镉环境中,24小时后观察其影响。结果表明,镉浓度≥0.2 μg.L−1时,对桡足类的存活率有显著影响。评估镉对生殖的亚致死效应;试验生物暴露于四种标称Cd浓度0、0.2、0.4、1µg.L-1。结果表明,随着金属浓度的增加,蛋鸡产蛋量呈下降趋势。随着镉浓度的增加,孵化幼体的数量减少。因此,作为模型试验种的庞氏梭菌的存活和繁殖可作为监测海洋金属污染的有效生理指标。
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引用次数: 11
Seaweed Incorporated Diet Improves Astaxanthin Content of Shrimp Muscle Tissue 添加海藻饲料提高对虾肌肉组织虾青素含量
Pub Date : 2015-04-27 DOI: 10.4172/2155-9910.1000161
K. Mondal, S. Bhattacharyya, A. Mitra
Marine shrimp (Penaeus monodon) is one of the major candidate species for export oriented aquaculture which dominates the seafood market in regions of European Union, Southeast Asia and USA. Carotenoid rich seafood has now become one of the important criteria in determining the quality of the product to be exported. Recent trends in supplementing fish diets with natural pigment source is an alternative to the utilization of expensive synthetic pigments. In this context, green seaweed Enteromorpha intestinalis was selected as a source of carotenoid for inclusion in the formulated diet of Penaeus monodon. Astaxanthin being an important category of carotenoid pigment was monitored in shrimp muscle tissue during the feeding trial. Significant variation (p<0.05) was observed between the experimental groups as confirmed through ANOVA thus exhibiting higher astaxanthin content of shrimps (18.70 ± 4.48 ppm) fed with seaweed incorporated diet as compared to control (15.80 ± 2.33 ppm). The present experiment therefore emphasizes on the quality improvement of aquaculture product through dietary inclusion of seaweed as a source of astaxanthin.
单对虾(Penaeus monodon)是出口导向水产养殖的主要候选品种之一,在欧盟、东南亚和美国地区的海鲜市场占据主导地位。富含类胡萝卜素的海产品现已成为决定出口产品质量的重要标准之一。最近的趋势是在鱼类饲料中添加天然色素来源,以替代昂贵的合成色素的使用。在这种情况下,绿色海藻肠Enteromorpha ininalis被选择作为类胡萝卜素的来源,包括在对虾的配方饲料。虾青素是类胡萝卜素中重要的一类,在饲养试验中对虾肌肉组织进行了监测。通过方差分析,各组间差异显著(p<0.05),表明添加海藻饲料的虾青素含量(18.70±4.48 ppm)高于对照组(15.80±2.33 ppm)。因此,本试验强调通过在饲料中添加海藻作为虾青素的来源来提高水产养殖产品的质量。
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引用次数: 8
Endocrine Disruptors in Estuarine Environments: We Still Need a Simple and Cost-Effective Framework for Environmental Monitoring 河口环境中的内分泌干扰物:我们仍然需要一个简单和具有成本效益的环境监测框架
Pub Date : 2015-04-15 DOI: 10.4172/2155-9910.1000E136
Nascimento Mtl, S. Ado, M. deOliveiraeSá, R. Pereira, M. Vieira
Copyright: © 2015 Nascimento MTL, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Endocrine Disruptors in Estuarine Environments: We Still Need a Simple and Cost-Effective Framework for Environmental Monitoring
版权所有:©2015 Nascimento MTL等。这是一篇根据知识共享署名许可协议发布的开放获取文章,该协议允许在任何媒体上不受限制地使用、分发和复制,前提是要注明原作者和来源。河口环境中的内分泌干扰物:我们仍然需要一个简单和具有成本效益的环境监测框架
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引用次数: 8
Future of Mangroves 红树林的未来
Pub Date : 2015-04-09 DOI: 10.4172/2155-9910.1000E135
A. Mitra
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引用次数: 2
In Vitro Test and Molecular Docking of Alkaloid Compound in MarineSponge Cinachyrella anomala against T47D Cell Cycle 海棠生物碱类化合物抗T47D细胞周期体外实验及分子对接
Pub Date : 2015-03-30 DOI: 10.4172/2155-9910.1000158
A. Nurhayati, R. Pratiwi, S. Wahyuono, Istriyati, H. Purnomo, S. Abdillah
The compound 1,4,9-triazatricyclo[7,3,1,0]trideca-3,5(13),10-trien-8-ol (SA2014) was isolated from the marine sponge Cinachyrella anomala. In vitro assay for SA2014 compound was found to be able to induce cell-cycle arrest at the sub-G1 and G2/M phases of T47D cancerous cell. A combined dosage between of SA2014 compound and of doxorubicin was able to induce cell-cycle arrest at sub-G1 and G2/M phases. Molecular docking approach showed that SA2014 compound inhibited cdk2 enzyme. The strength of interaction between SA2014 and cdk2 (docking score = -65,43) was more stable than the interaction between doxorubicin and cdk2 (-36,59).
化合物1,4,9-三氮杂环[7,3,1,0]三氮杂环-3,5(13),10-三烯-8-醇(SA2014)从海绵中华水藻(Cinachyrella anomalala)中分离得到。体外实验发现,SA2014化合物能够诱导T47D癌细胞的亚g1期和G2/M期细胞周期阻滞。复方SA2014与阿霉素联合用药可诱导细胞周期阻滞在亚g1期和G2/M期。分子对接分析表明,SA2014化合物对cdk2酶有抑制作用。SA2014与cdk2的相互作用强度(对接评分= -65,43)比阿霉素与cdk2的相互作用更稳定(-36,59)。
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引用次数: 6
Acoustic Characterization of Fish and Seabed Using Underwater Acoustic Technology in Seribu Island Indonesia 利用水声技术研究印尼塞里布岛鱼类和海床的声学特征
Pub Date : 2015-02-02 DOI: 10.4172/2155-9910.1000157
H. Manik
Remote sensing technique using underwater acoustics are one of the most cost-effective methods of resource detection and mapping, particularly in the coastal zone. We measured the acoustic backscatter using single beam echosounder from water column target and sea bottom. The increasing of fish size is followed by target strength value. For sea bottom, the highest acoustic backscattering was sand followed by silt and clay. This was caused by the acoustic impedance difference and also the presence of the organisms in sediment. By this study, classification and characterization of underwater target such as fish and seabed using acoustic technology was possible.
利用水下声学的遥感技术是最具成本效益的资源探测和测绘方法之一,特别是在沿海地区。利用单波束测深仪分别从水柱目标和海底进行了声波后向散射测量。目标强度值随鱼体尺寸的增大而增大。在海底,声后向散射最大的是沙子,其次是淤泥和粘土。这是由声阻抗差异和沉积物中生物的存在引起的。通过本研究,可以利用声学技术对鱼类和海底等水下目标进行分类和表征。
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引用次数: 8
Diversity Investigation of the Seaweeds Growing on the Lebanese Coast 黎巴嫩海岸生长的海藻多样性调查
Pub Date : 2014-12-31 DOI: 10.4172/2155-9910.1000156
H. Kanaan, O. Belous, A. Chokr
By specialized underwater cameras we have filmed and collected samples of algae from the following sites along the Lebanese coast: Batroun, Barbara, Manara, Officer’s Military club, Saida, Sarafand, Tyre and Naqoura. We have identified ninety-four species of algae that grow along the Lebanese coast and we have established a collection sites map of these algal species. The identification of the samples was done in three steps: (1) Determine the largest group (green, brown and red algae) to which the sample belongs, then continue searching within the most likely group. (2) Seek off in the succession of morphological types which proposed that the sample is approaching. (3) Seek out using the illustrations and descriptions a satisfactory identification. It is worth noting that confirmation cannot be obtained in all cases unless a careful reading of the description is done. (4) We then proceeded to the classification of the collected seaweeds which are distributed as follows: Rhodophyta forty one species, Ochrophyta twenty two species, Chlorophyta twenty six species and Cyanobacteria five species. (5) Synthesis: The present study allowed us to establish a primary infrastructure regarding the distribution of the Lebanese seaweeds. Such findings represent an important scientific support concerning the Mediterranean seaweeds, which provides a great assist in algal studies and all its applications. This screening of the Lebanese coastline shows a broad and significant algal distribution. The most common algal types among the identified ones are: Sargassum, Padina, Laurencia, Ulva, Corallina, Hypnea, Chondracanthus, Jania, Amphiroa, Pterocladia, Cladophera, Codium.
通过专门的水下摄像机,我们在黎巴嫩沿岸的以下地点拍摄并收集了藻类样本:Batroun、Barbara、Manara、军官军事俱乐部、Saida、Sarafand、Tyre和Naqoura。我们已经确定了生长在黎巴嫩海岸的94种藻类,我们已经建立了这些藻类物种的收集点地图。样品的鉴定分三步完成:(1)确定样品所属的最大群体(绿藻、褐藻和红藻),然后在最可能的群体中继续搜索。(2)在连续的形态类型中寻找表明样品正在接近的形态类型。(3)利用插图和描述找出一个令人满意的识别。值得注意的是,除非仔细阅读说明书,否则无法在所有情况下获得确认。(4)对收集到的海藻进行分类,分布为红藻门41种,绿藻门22种,绿藻门26种,蓝藻门5种。(5)综合:本研究使我们能够建立关于黎巴嫩海藻分布的初级基础设施。这些发现为地中海海藻的研究提供了重要的科学支持,为藻类研究及其应用提供了极大的帮助。这张黎巴嫩海岸线的照片显示了广泛而重要的藻类分布。在已确定的藻类中,最常见的藻类类型是:马尾藻、Padina、Laurencia、Ulva、Corallina、Hypnea、Chondracanthus、Jania、Amphiroa、Pterocladia、Cladophera、Codium。
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引用次数: 7
期刊
Journal of Marine Science: Research & Development
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