Oceanography & Fisheries Open access Journal最新文献_第4页

Vulnerability of the Ocean by the Impact of Pandemic COVID-19 受COVID-19大流行影响的海洋脆弱性

Oceanography & Fisheries Open access Journal Pub Date : 2020-10-22 DOI: 10.19080/OFOAJ.2020.12.555845

Yasar N. Kavil, Radwan K. Al-Farawati, A. Turki

{"title":"Vulnerability of the Ocean by the Impact of Pandemic COVID-19","authors":"Yasar N. Kavil, Radwan K. Al-Farawati, A. Turki","doi":"10.19080/OFOAJ.2020.12.555845","DOIUrl":"https://doi.org/10.19080/OFOAJ.2020.12.555845","url":null,"abstract":"The very recent pandemic issue, COVID-19 has made a huge impact in all the field irrespective of the nations. The issue has not resolved yet and the scientific world is trying to discover the vaccine against COVID-19. The lock down effect of this pandemic issue has made a small-time scale positive impacts in the environment by reducing the anthropogenic pollution. However, the economy of each country has declined drasti- cally even in the developed nations. In some countries, maritime shipping has seen COVID-19-associated declines in activity of up to 30 percent. In China and West Africa, lockdowns and decreased demand for seafood have seen fishing activity dropping by as much as 80 percent. Entire na - tions dependent on tourism related to oceans and beaches have closed their borders. These changes have made a huge impact on blue economy and the small-scale fishing industry. The use of mask is compelled to everyone, which is rather a necessity, but improper waste management will deteriorate the environment badly. Due to the unprofessional disposal of huge quantities of mask to the environment from various sources may end up in the marine environment and negatively impact the marine ecosystem as well.","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114009679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heavy Metals Profile Assessment in the Liver and Muscle Tissues of Nile Tilapia at The End of Production Cycle 尼罗罗非鱼生产周期末肝脏和肌肉组织重金属特征评价

Oceanography & Fisheries Open access Journal Pub Date : 2020-10-19 DOI: 10.19080/OFOAJ.2020.12.555844

S. El-Zaeem

引用次数: 0

Fisheries and Ocean Currents: A Postmodern Approach 渔业和洋流:一个后现代的方法

Oceanography & Fisheries Open access Journal Pub Date : 2020-10-16 DOI: 10.19080/OFOAJ.2020.12.555843

Axel Holmberg

引用次数: 0

A Case Study of Wave Forecast Over South China Sea Using SWAN Model and Ensemble Kalman Filter Method SWAN模式与集合卡尔曼滤波法在南海海浪预报中的应用

Oceanography & Fisheries Open access Journal Pub Date : 2020-10-07 DOI: 10.19080/OFOAJ.2020.12.555842

T. N. Trung

{"title":"A Case Study of Wave Forecast Over South China Sea Using SWAN Model and Ensemble Kalman Filter Method","authors":"T. N. Trung","doi":"10.19080/OFOAJ.2020.12.555842","DOIUrl":"https://doi.org/10.19080/OFOAJ.2020.12.555842","url":null,"abstract":"The marine and atmospheric model’s accuracy mainly depends on the quality of the initial and boundary conditions, numeric, and physics of the model, and on the variation of the phenomena (e.g., chaos of atmosphere) [1-3]. In the wave prediction problem, the wave field is mainly calculated based on the wave–action balance equations (e.g., the WAVEWATCH III, simulating waves nearshore SWAN, wave model WAM) with the given initial and boundary conditions. There are two types of boundary conditions, including surface and open boundaries. The surface boundary is a field of meteorological factors (wind and pressure fields) extracted from meteorological forecasting models. For the open boundaries, the wave direction, period, wave height or wave spectrum from models or observations can be used at a limited area, such as the South China Sea East Sea of Vietnam (SCS). There are two ways to determine the initial condition for the wave model: (i) The initial condition is the state of the calm sea surface until the actual state of the sea surface is reached to continue calculating the forecast (for example, in the SCS, this process usually takes 48 to 72 h); and (ii) using the analysis wave field as the initial condition. This initial field can be either the observational data or the wave field from the previous forecast (the hot start running).","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116000752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Length-Weight Relationship and Spawning Season of Bagrus bayad (Forsskal, 1775) in Yamama Lake Kebbi State, Nigeria 尼日利亚Yamama Lake Kebbi州Bagrus bayad (Forsskal, 1775)的长重关系和产卵季节

Oceanography & Fisheries Open access Journal Pub Date : 2020-10-01 DOI: 10.19080/OFOAJ.2020.12.555841

Jega Ibrahim Shehu

{"title":"Length-Weight Relationship and Spawning Season of Bagrus bayad (Forsskal, 1775) in Yamama Lake Kebbi State, Nigeria","authors":"Jega Ibrahim Shehu","doi":"10.19080/OFOAJ.2020.12.555841","DOIUrl":"https://doi.org/10.19080/OFOAJ.2020.12.555841","url":null,"abstract":"High production capacity of members of Bagridae family in the wild has prompted many attempts by fisheries scientists to culture them. Chrysichthys nigrodigitatus have been cultured along with Tilapia melanoplura and Cyprinus carpio in Buguma, Nigeria, with encouraging results [1]. Bagrus docmac have been cultured with Tilapia in Uganda and being carnivorous, they were found to be effective in controlling Tilapia population. Many catfishes do not readily breed under captivity because they are not able to exhibit their natural spawning behavior in artificial ponds and this constitutes a limiting factor to their culture and mass production [2]. Bagrus bayad, also called bayad with local (Hausa) name Shambani is a member of Bagridae family which are commonly referred to as a naked catfish. They are commercially important species found in Nigeria fresh waters especially in Rivers and Lakes such as Niger, Kaduna, Benue, Lake Chad, and other inland waters [3]. The length-weight relationship (LWR) of fishes are important in fisheries biology and the study of natural history of fishes because they allow the estimation of the average weight of fish of a given length group by creating a mathematical relationship between them [4,5]. LWR can also be used to calculate condition indices, to compare life history and morphology of population belonging to different region and to study oncogenic allometric changes [6,7]. LWR is also an important factor in fish ecology and in the biological study of fishes, being of prime importance in parameterizing fish yield equation in stock assessment and management [8].","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130107369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Benchmarking Study of West Africa’s Offshore Support Ship Building and Repair Capability 西非近海支援船建造与维修能力的标杆研究

Oceanography & Fisheries Open access Journal Pub Date : 2020-09-28 DOI: 10.19080/OFOAJ.2020.12.555840

C. Onyemechi, C. Igboanusi, A. Ezenwa, A. Sule

引用次数: 0

Fisheries-Independent Evidence of Longline Fisheries Impact on the Threatened Mediterranean Blue Shark Prionace Glauca in The Waters Around the Balearic Islands (Spain) 渔业:延绳钓渔业对巴利阿里群岛(西班牙)周围水域濒临灭绝的地中海蓝鲨pronace Glauca影响的独立证据

Oceanography & Fisheries Open access Journal Pub Date : 2020-09-16 DOI: 10.19080/OFOAJ.2020.12.555839

E. Clua, A. Abril, Clémentine Séguigne, G. Siu, Agusti Torres

{"title":"Fisheries-Independent Evidence of Longline Fisheries Impact on the Threatened Mediterranean Blue Shark Prionace Glauca in The Waters Around the Balearic Islands (Spain)","authors":"E. Clua, A. Abril, Clémentine Séguigne, G. Siu, Agusti Torres","doi":"10.19080/OFOAJ.2020.12.555839","DOIUrl":"https://doi.org/10.19080/OFOAJ.2020.12.555839","url":null,"abstract":"The Mediterranean Sea is one of the seas most affected by the collapse of shark populations due to overfishing. Considered ‘vulnerable’ by the IUCN on a global scale, the blue shark Prionace glauca is classified as ‘Critically Endangered’ in the Mediterranean Sea. A fisheries-indepen - dent study was conducted through the implementation of 14 filming sessions, lasting between 5 and 10 days, during winter and summer seasons between July 2017 and February 2020, in semi-pelagic waters around the islands of Mallorca and Menorca (Balearic Islands, Western Mediterra- nean). Using 24-hour BRUVs, we collected 1685 hours of video that allowed us to observe 10 blue sharks, six males and four females, estimated between 1.2 and 2.5 m in total length (TL). In addition to their low abundance (average of 0.02 shark ±0,025 observed per hour), 50% of animals presented residual hook, sometimes with a nylon leader several meters long, potentially jeopardizing its survival. In addition to other threats, the frequent presence of residual hooks may contribute to a cryptic mortality of this species in relation to pelagic fisheries, calling into question the future of this species in this region of the world.","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122308757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Evaluation of Metal Pollution in Sediments and Water of Sao Marco Harbor (Maranhão, Brazil) 巴西圣马可港沉积物及水体金属污染评价

Oceanography & Fisheries Open access Journal Pub Date : 2020-09-01 DOI: 10.19080/OFOAJ.2020.12.555837

M. FonsecaE, F. DelgadoJDe, S. LimaLDa, C. BrittoEBC, P. AlmeidaM, S. VieiraK, M. AmorimR, A. BaptistaNetoJ

{"title":"Evaluation of Metal Pollution in Sediments and Water of Sao Marco Harbor (Maranhão, Brazil)","authors":"M. FonsecaE, F. DelgadoJDe, S. LimaLDa, C. BrittoEBC, P. AlmeidaM, S. VieiraK, M. AmorimR, A. BaptistaNetoJ","doi":"10.19080/OFOAJ.2020.12.555837","DOIUrl":"https://doi.org/10.19080/OFOAJ.2020.12.555837","url":null,"abstract":"The assessment of pollution in poor regions remains a challenge for developing countries. Difficult access to and low availability of logistical conditions result in a lack of information on environmental quality in these regions. To provide information on heavy metals concentrations in water and sediments, samples were collected in seven sampling stations in São Marco Bay’s harbor area, seasonally, from August 2017 to September 2018. Water samples were evaluated for temperature, turbidity, salinity, Eh, oxygen content, pH, phosphorus, total organic carbons, and heavy metals. In sediment samples, heavy metals’ potentially mobilizable fractions were evaluated. In parallel, grain size, organic matter and redox potential were also analyzed. The average values of water and its physicochemical parameters revealed an unstratified environment with a great influence of ocean waters. High concentrations of metals were recorded in the water of sediment contamination. The present study suggested the high hydrodynamics and resulting coarser grain size accumulation as the cause for the relatively balanced environment conditions.","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117311162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

From Source to Sink: How Linking Upstream Fluvial Processes to Mangrove Sedimentation Can Improve Mangrove Management Strategies 从源头到汇:如何将上游河流过程与红树林沉积联系起来可以改善红树林管理策略

Oceanography & Fisheries Open access Journal Pub Date : 2020-08-13 DOI: 10.19080/OFOAJ.2020.12.555835

Shannon Jones

{"title":"From Source to Sink: How Linking Upstream Fluvial Processes to Mangrove Sedimentation Can Improve Mangrove Management Strategies","authors":"Shannon Jones","doi":"10.19080/OFOAJ.2020.12.555835","DOIUrl":"https://doi.org/10.19080/OFOAJ.2020.12.555835","url":null,"abstract":"Although recent attention has been given to accelerated sea level rise (SLR), anthropogenic activity disrupts incoming flow and sediment critical to maintaining the mangrove ecosystem. Deforestation and conversion to agriculture and urban landscapes can increase sedimentation rates of mangroves. Excess sedimentation of mangroves causes upland species invasions, aerial root burial, and tree die-off. Conversely, dams and diversion of flow decrease the influx of sediment into mangroves and limits the effectiveness of mangroves to respond to SLR. Predicted increases in precipitation, erosion, and flooding due to climate change further exacerbates these issues, yet current hydrologic models do not fully incorporate the interrelations and amplification of these processes from anthropogenic activity and climate change. Despite significant literature of fluvial, coastal, and marine processes and their effects on mangroves, there is limited understanding of the complex integrations and interactions between these processes and their effect on mangrove sedimentation. Although improving, hydrometeorological monitoring is often spatially and temporally limited, therefore extracting mangrove sediment records can provide information on sediment accretion rates in relation to SLR. Additionally, hydrologic models, created primarily by and for temperate environments, often do not effectively model tropical processes, seasonal effects of rainfall, or compound fluvial and coastal flooding from tropical cyclones. The lack of integrated hydrologic model - ling and monitoring leaves local communities ill-prepared to make effective management decisions. Globally, to make significant advancement towards effective mangrove management, upstream river management is needed in addition to limitations on mass tourism, deforestation, and rapid development in areas hydrologically connected to the mangroves.","PeriodicalId":308766,"journal":{"name":"Oceanography & Fisheries Open access Journal","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115208739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Feeding Ecology of Pterois volitans on the Coral Reefs of Northern Veracruz, Mexico 墨西哥北韦拉克鲁斯州珊瑚礁上的灰翼龙的摄食生态学

Oceanography & Fisheries Open access Journal Pub Date : 2020-08-10 DOI: 10.19080/OFOAJ.2020.12.555834

C. González-Gándara, Pastor Alberto Escarcega-Quiroga, Seth Donovan Flores-Serrano

引用次数: 0