Journal of Marine Science and Technology最新文献_第10页

Site Fidelity and Residency of Tursiops truncatus off the Aragua Coast, Venezuela-First Records of Long Residency 地点保真度和居住的Tursiops truncatus在阿拉瓜海岸，委内瑞拉-长期居住的第一个记录

IF 2.6 4区工程技术

Journal of Marine Science and Technology Pub Date : 2021-10-31 DOI: 10.30564/jms.v3i4.3811

S. Cobarrubia-Russo, Sawyer I., M. Gómez-Alceste, A. Molero-Lizarraga

{"title":"Site Fidelity and Residency of Tursiops truncatus off the Aragua Coast, Venezuela-First Records of Long Residency","authors":"S. Cobarrubia-Russo, Sawyer I., M. Gómez-Alceste, A. Molero-Lizarraga","doi":"10.30564/jms.v3i4.3811","DOIUrl":"https://doi.org/10.30564/jms.v3i4.3811","url":null,"abstract":"This study represents the first comprehensive analysis of the residency patterns of a coastal population of bottlenose dolphin off the coast of Aragua, Venezuela, over a multi-year period. Using photo-identification, the most recent study (2019-2020) identified 56 individuals with the time between encounters from one to 344 days between the first and last sighting. Site Fidelity (SF) and Residence (RES) indices were calculated and Agglomerative Hierarchical Clustering (AHC) modeling was performed, with three patterns of residence obtained: resident (25%), semiresident (17.86%) and transient (57.14%). These results were contrasted with remodeled data from a previous study (2006-2007), showing similar patterns: resident (24.44%), semi-resident (28.89%) and transient (46.67%). Importantly, two individuals were found to have been resident over the extended period. A breeding female sighted for the first time in 2004 and again in 2020 (16 years) and the other from 2005 to 2020 (15 years). This region is an important area for marine mammals, known to support a resident reproductive population over many years, as well seabirds, sea turtles, whale sharks and fishermen. We recommend that consideration be given to designating the waters as a Marine Protected Area to safeguard the existing population and provide benefit to the surrounding marine environment.","PeriodicalId":16334,"journal":{"name":"Journal of Marine Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80980418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mass Beach Stranding of Blue Button Jellyfishes, Porpita porpita (Linnaeus 1758) from the Coast of Mandvi, Kutch, India during August, 2021 2021年8月，印度库奇曼德维海岸的蓝纽扣水母(Porpita Porpita, Linnaeus 1758)在海滩搁浅

IF 2.6 4区工程技术

Journal of Marine Science and Technology Pub Date : 2021-10-31 DOI: 10.30564/jms.v3i4.3851

Niki Shah, Yashesh Shah

引用次数: 0

Spatial Analysis of Maritime Piracy in the Gulf of Guinea 几内亚湾海盗的空间分析

IF 2.6 4区工程技术

Journal of Marine Science and Technology Pub Date : 2021-10-29 DOI: 10.30564/jms.v3i4.3810

Jonathan Ejuvweyere Okpuvwie

引用次数: 2

Ocean Affects from Severe Weather Systems in Coastal Areas 沿海地区恶劣天气系统对海洋的影响

IF 2.6 4区工程技术

Journal of Marine Science and Technology Pub Date : 2021-10-28 DOI: 10.30564/jms.v3i4.3772

J. Callaghan

引用次数: 0

Codon Usage of Chloroplast Gene rbcL in Laurencia sensu lato (Rhodophyta) species 月桂属植物叶绿体基因rbcL密码子的使用

IF 2.6 4区工程技术

Journal of Marine Science and Technology Pub Date : 2021-09-28 DOI: 10.30564/jms.v3i4.3542

R. Cabrera, J. Díaz‐Larrea, Arsenio J. Areces, L. Ñúñez García, J. Cruz-Aviña, Gabriela Vázquez Silva

{"title":"Codon Usage of Chloroplast Gene rbcL in Laurencia sensu lato (Rhodophyta) species","authors":"R. Cabrera, J. Díaz‐Larrea, Arsenio J. Areces, L. Ñúñez García, J. Cruz-Aviña, Gabriela Vázquez Silva","doi":"10.30564/jms.v3i4.3542","DOIUrl":"https://doi.org/10.30564/jms.v3i4.3542","url":null,"abstract":"Recent advances in molecular biology make it possible to sequence not only genes or genomes, but also to understand codon dynamics. For the organelle genes of these organisms, a small set of preferred codons are used for encoding proteins. For the first time, this paper treats the divergence of synonymous codon usage and its bias in the rbcL gene within the Laurencia complex of red algae. We observed that the synonymous codon preference biases in rbcL are large and differ among species. A clear distinction in codon usage between genera is evident: the genera Dasya and Delesseria use a set that fluctuated between 53 and 58 codons. Whereas, in the genera Ceramium, Chondrophycus, Chlamydomonas, Chlorella, Laurencia s.s, Osmundea, and Palisada codon usage indicates a higher restriction fluctuating between 40 to 51 codons. Laurencia complex genera and other representative algae showed a defined composition pattern, with lower percentage values of NNC/G (7-24.9%). Dasya and Delesseria showed a selective pattern tendency because of high percentage values of NNC/G (54-55%). The estimated codon bias parameters were tested to infer systematic relationships and match suitable codons with the NNC / G codon percentages. Cluster analysis based on Codon Usage supports phylogenetic relationships between Chondrophycus, Palisada, Laurencia, Osmundea, and Yuzurua species.","PeriodicalId":16334,"journal":{"name":"Journal of Marine Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2021-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83139186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Simulation of turbulent effective wakes for propellers in off-design conditions by a correction factor approach. 用修正系数法模拟非设计条件下螺旋桨的湍流有效晃动。

IF 2.7 4区工程技术

Journal of Marine Science and Technology Pub Date : 2021-01-01 Epub Date: 2021-01-19 DOI: 10.1007/s00773-020-00794-7

Antonio Sánchez-Caja, Jussi Martio, Ville M Viitanen, Timo Siikonen

{"title":"Simulation of turbulent effective wakes for propellers in off-design conditions by a correction factor approach.","authors":"Antonio Sánchez-Caja, Jussi Martio, Ville M Viitanen, Timo Siikonen","doi":"10.1007/s00773-020-00794-7","DOIUrl":"10.1007/s00773-020-00794-7","url":null,"abstract":"<p><p>This paper presents a procedure for the estimation of propeller effective wakes in oblique flows. It shows how a recently developed method for controlling coupling errors can be applied to analyze propellers operating in off-design conditions. The approach allows the use of fast potential flow methods for the representation of the propeller in the context of viscous flow solvers and works accurately for a wide range of advance numbers and incidence angles with a minimum computational cost. The new method makes it possible to disclose flow phenomena on the effective wake that were hidden in conventional approaches of effective wake simulation. Different application cases are analyzed, such as a propeller-shaft configuration in inclined flow, a pod propulsor in an oblique inflow, and a ship hull advancing at a yaw angle. A dipole-like distortion on the effective wake is unmasked for a uniform flow incident to a propeller mounted on an inclined shaft. The flow component perpendicular to the axis is found to be responsible for the distortion. The effect of the direction of propeller rotation on the effective wake is illustrated for a single-shaft ship moving at a yaw angle. In particular, keel vortices are either attracted to or repelled from the propeller disk depending on the sign of the yaw angle or alternatively on that of the propeller rotation.</p>","PeriodicalId":16334,"journal":{"name":"Journal of Marine Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7813973/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38853165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Journal of Marine Science: An Open Framework Dedicated to the Presentation of the Discoveries and Insights in Marine Science Research 海洋科学杂志:一个开放的框架，致力于展示海洋科学研究的发现和见解

IF 2.6 4区工程技术

Journal of Marine Science and Technology Pub Date : 2021-01-01 DOI: 10.30564/jms.v3i3.3511

E. Rusu

引用次数: 0

Hydrogeological and Hydrochemical Characterization of Coastal aquifers with Special reference to Submarine Groundwater Discharge in Uttara kannada, Karnataka, India 印度卡纳塔克邦北坎纳达沿海含水层的水文地质和水化学特征，特别参考海底地下水排放

IF 2.6 4区工程技术

Journal of Marine Science and Technology Pub Date : 2021-01-01 DOI: 10.30564/jms.v3i3.3476

B. Purandara, Sudhir Kumar, N. Varadarajan, Sumit Kant, J. Tyagi

{"title":"Hydrogeological and Hydrochemical Characterization of Coastal aquifers with Special reference to Submarine Groundwater Discharge in Uttara kannada, Karnataka, India","authors":"B. Purandara, Sudhir Kumar, N. Varadarajan, Sumit Kant, J. Tyagi","doi":"10.30564/jms.v3i3.3476","DOIUrl":"https://doi.org/10.30564/jms.v3i3.3476","url":null,"abstract":"Submarine groundwater discharges to the coastal ecosystems have been recognised as a source of dissolved chemical substances that cause chemical and ecological effects on sea waters. Groundwater, in many coastal areas, becomes contaminated or at least enriched with a variety of chemical substances and can have higher concentrations of dissolved solids than river water. As a result SGD makes a larger contribution to the ﬂux of dissolved chemical compounds than river run-off. Therefore, the present investigation has been carried out to understand the process of submarine groundwater discharge based on hydrological, hydrogeological and hydrochemical components. Accordingly water balance components were evaluated based on hydrological and hydrogeological investigations. Hydrochemical parameters were also evaluated to understand the impact of seawater intrusion during both pre-monsoon and post-monsoon seasons of 2019. Study revealed that, there are signatures of considerable quantity of submarine groundwater discharge in parts of Honnavara, Kumta, Ankola and Karwar talukas. The influence of seawater in coastal aquifers is quite rare all along the coast of Uttara kannada district which is attributed to high groundwater recharge(15-20%) occurring in catchment areas.","PeriodicalId":16334,"journal":{"name":"Journal of Marine Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81034981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Overview of Oligocene to Recent Sediments of the Western Pacific Warm Pool (WPWP) (International Ocean Discovery Program-IODP Exp. 363) Using Warm and Cool Foraminiferal Species 西太平洋暖池(WPWP)渐新世至近代沉积物概述(国际海洋发现计划- iodp Exp. 363)

IF 2.6 4区工程技术

Journal of Marine Science and Technology Pub Date : 2021-01-01 DOI: 10.30564/jms.v3i3.3516

Patrícia Pinheiro Beck Eichler, Christofer Paul Barker, M. Gomes, H. Vital

{"title":"An Overview of Oligocene to Recent Sediments of the Western Pacific Warm Pool (WPWP) (International Ocean Discovery Program-IODP Exp. 363) Using Warm and Cool Foraminiferal Species","authors":"Patrícia Pinheiro Beck Eichler, Christofer Paul Barker, M. Gomes, H. Vital","doi":"10.30564/jms.v3i3.3516","DOIUrl":"https://doi.org/10.30564/jms.v3i3.3516","url":null,"abstract":"We use the excellent sediment recovery of International Ocean Discovery Program (IODP) Exp. 363, in the Western Pacific Warm Pool (WPWP) to assess down-core variations in the abundance of warm versus cool benthic foraminiferal species through a warm benthic foraminifers (WBF) curve. The total percentage of the “warm” shallower species group (Laticarinina pauperata, Cibicidoides kullenbergi, C. robertsonianus, Cibicidoides sp., Hoeglundina elegans, and Bulimina aculeata) and of the “cool” species group from deep waters (Pyrgo murrhina, Planulina wuellerstorfi, Uvigerina peregrina, and Globobulimina hoeglundi, Hopkinsina pacifica) at all sites is used to assess paleo temporal and spatial variations in preservation and marine temperature. Our study sites span water depths ranging from 875 m to 3421 m and our results indicate that well-preserved living and fossil foraminifera characterize mudline and core sediments at all water depths attesting the wide environmental tolerance of these species to temperature and pressure. Using magneto-and biostratigraphy datum, these sediments are of Oligocene age. Our low-resolution study showed that with the exception of core 1486B which the linear tendency of warmer species is toward cool sediments in old times, all of them show that older sediments indicate warmer periods than today, which is expected from Miocene to Recent. Our results provide evidence for the preservation potential of deeply buried sediments, which has implications on climate reconstructions based on the population dynamics of calcareous benthic foraminifera.","PeriodicalId":16334,"journal":{"name":"Journal of Marine Science and Technology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79200162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Reproductive Biology of Splendid Ponyfish Leiognathus splendens (Cuvier, 1829) in Myeik Coastal Waters, Myanmar 缅甸Myeik沿海水域灿烂马鱼leognathus splendens (Cuvier, 1829)的生殖生物学

IF 2.6 4区工程技术

Journal of Marine Science and Technology Pub Date : 2019-09-30 DOI: 10.30564/jmsr.v1i2.923

K. Maung, Phan Minh-Thu, N. Tun

引用次数: 1