Brazilian Journal of Oceanography最新文献_第2页

Genetic diversity of eight wild populations of Pampus argenteus along the coast of China inferred from fifteen polymorphic microsatellite markers 利用15个多态微卫星标记推测中国沿海8个野生种属的遗传多样性

Brazilian Journal of Oceanography Pub Date : 2019-01-01 DOI: 10.1590/s1679-87592019025106711

D. Sun, Yushuang Ge, Q. Cheng

{"title":"Genetic diversity of eight wild populations of Pampus argenteus along the coast of China inferred from fifteen polymorphic microsatellite markers","authors":"D. Sun, Yushuang Ge, Q. Cheng","doi":"10.1590/s1679-87592019025106711","DOIUrl":"https://doi.org/10.1590/s1679-87592019025106711","url":null,"abstract":"Pampus argenteus (Perciformes: Stromateidae) is widely distributed along the coast of China, Indian Ocean, Arabian Gulf and North Sea. Due to overfishing and environmental degradation, its resources reduced year after year. Thus, new management strategies are urgently needed for the sustainable growth and utilization of this species. Characterization of the genetic variation of this fish species is essential for conserving the genetic resource and restraining the population decline. Therefore, it is necessary to have a clear understanding of the intraspecific genetic diversity and population structure of the species. In this study, we assess the genetic diversity and population structure of P. argenteus by using microsatellites. We genotyped 240 P. argenteus individuals from eight wild populations collected from Shidao (SD), Lianyungang (LYG), Lvsi (LS), Zhoushan (ZS), Dongtou (DT), Xiapu (XP), Haikou (HK), and Beibuwan (BBW) along the coast of China using fifteen polymorphic microsatellites. A total of 139 alleles were determined at 15 loci across the eight populations, and a relatively high level of genetic diversity was observed, with observed heterozygosity (Ho) and expected heterozygosity (He) ranging from 0.100 to 1.000, and from 0.669 to 0.934 per locus-location combination, respectively. LS had the highest average allele (number of alleles, A=15.200), and HK the lowest (A=13.000). Hos of P. argenteus are less than Hes, indicating lack of heterozygote within populations. Analysis of molecular variance (AMOVA) showed that most variation (95.66%) occurred within populations, suggesting that this is the main source of total variance. This study will provide useful information for conservation and sustainable exploitation of this important fishery resource. AbstrAct Dandan Sun1, Yushuang Ge1, Qiqun Cheng1,*","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67425301","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: 3

The variability of the subantarctic front and the Southern Hemisphere atmospheric jet 亚南极锋和南半球大气急流的变率

Brazilian Journal of Oceanography Pub Date : 2019-01-01 DOI: 10.1590/s1679-87592019025606712

J. L. Simon, R. Rodrigues

{"title":"The variability of the subantarctic front and the Southern Hemisphere atmospheric jet","authors":"J. L. Simon, R. Rodrigues","doi":"10.1590/s1679-87592019025606712","DOIUrl":"https://doi.org/10.1590/s1679-87592019025606712","url":null,"abstract":"The latitudinal variations of the Subantarctic Front (SAF) and Southern Hemisphere atmospheric jet were investigated for the period of 1993-2016. Zonal wind velocity, sea surface height and temperature data were used to identify these features over the South Atlantic, South Pacific and Indian Oceans individually. During this period, the atmospheric jet migrated poleward 0.34°S decade-1 in the Atlantic, 0.28°S decade-1 in the Pacific and 0.14°S decade-1 in the Indian oceans. Previous works have shown that the poleward trend is due to the expansion of the tropical belt as a consequence of greenhouse gas increase and cooling of polar stratosphere due to ozone depletion. In addition the atmospheric jet strengthen in all three basins. The SAF represents the Antarctic Circumpolar Current northern boundary and was observed in average at 46.3°S (±0.5°) in the Atlantic, 54.3°S (±0.3°) in the Pacific and 46.6°S (±0.5°) in Indian Oceans. The SAF shows a poleward migration of 0.46°S decade-1 in the Atlantic, 0.20°S decade-1 in the Pacific and 0.27°S decade-1 in the Indian Oceans, which is attributed to the sea level increasing in the Southern Hemisphere due to thermal expansion. The SAF poleward trend is consistent with the positive trend of the Southern Annular Mode during the studied period. Moreover, the jet position is statistically significant correlated to the SAF position in each ocean basin. However, the coefficients are weak: +0.22 for the Atlantic, +0.17 for the Pacific and +0.21 for the Indian oceans. The latitudinal displacement of the SAF in the Pacific is inversely proportional to the El Nino-Southern Oscillations (ENSO). During El Nino years the SAF tend to be more poleward and during La Nina years more equatorward, with maximum correlation of 0.56, with ENSO leading by three months.","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67425322","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

The north Brazil undercurrent and the wind driven hydrodynamics in Japaratuba submarine canyon, Brazil 巴西北巴西暗流和风驱动的日本海底峡谷流体动力学

Brazilian Journal of Oceanography Pub Date : 2019-01-01 DOI: 10.1590/s1679-87592019022106702

S. R. Del-Giovannino, M. Dottori, R. Martins

引用次数: 2

Ecological and conservation aspects of bycatch fishes: An evaluation of shrimp fisheries impacts in Northeastern Brazil 副渔获物的生态和养护方面:巴西东北部对虾渔业影响的评价

Brazilian Journal of Oceanography Pub Date : 2019-01-01 DOI: 10.1590/s1679-87592019029106713

Rafaela Passarone, Kátia Cristina Aparecido, L. Eduardo, A. Lira, Lucas Vinícius Santos Silva, A. K. Justino, C. Craveiro, Emanuell F. Silva, F. Lucena‐Frédou

引用次数: 8

Geospatial analysis of the effects of tsunami on coral and mangrove ecosystems of Mayabunder in Andaman Islands, India 海啸对印度安达曼群岛Mayabunder珊瑚和红树林生态系统影响的地理空间分析

Brazilian Journal of Oceanography Pub Date : 2019-01-01 DOI: 10.1590/s1679-87592019025806715

D. Majumdar, S. Chakraborty, S. Saha, Debajit Datta

{"title":"Geospatial analysis of the effects of tsunami on coral and mangrove ecosystems of Mayabunder in Andaman Islands, India","authors":"D. Majumdar, S. Chakraborty, S. Saha, Debajit Datta","doi":"10.1590/s1679-87592019025806715","DOIUrl":"https://doi.org/10.1590/s1679-87592019025806715","url":null,"abstract":"Mangroves and coral reefs are among the major ecosystems of tropical and subtropical coastlines. The Andaman group of islands, situated at the juncture of Bay of Bengal and Indian Ocean, are one of the richest coastal ecosystems of India in terms of biodiversity. Since the tsunami waves of 2004 affected this region severely, the outer fringes as well as inland areas of these islands faced extensive ecological degradation. Mayabunder is one such place of this region, where corals and mangroves had experienced both natural and anthropogenic threat. Considering the notable vulnerability of this coastal environment, the present study aimed to assess the transformations of the coral and mangrove ecosystems at Mayabunder both in pre-tsunami and post-tsunami periods till the present year using multi-temporal satellite imageries and geospatial techniques. Results showed that the areal coverage of healthy living coral reefs was reduced by 466.56 ha (10.42 %) from 1990 to 2000. Afterwards, the coupled ecosystem had experienced serious degradation again during the 2000−2010 phase. The areal coverage of dense mangroves decreased by 47.37%, whereas the area of dead coral covers showed a significant rise of 55.52%. However, partial restoration of both mangroves as well as healthy corals had also been observed here in recent years. It was raised from the extensive field visits and feedbacks from local inhabitants that this restoration initiative could become more effective if a participatory mode of management is adopted. AbstrAct Debaleena Majumdar1, Subha Chakraborty2, Swati Saha2, Debajit Datta1*","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67425377","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

Estimation of the hundred year return level of the signiﬁcant wave height for the French Guiana coast 法属圭亚那海岸百年际显著波高回归水平的估计

Brazilian Journal of Oceanography Pub Date : 2018-12-01 DOI: 10.1590/S1679-87592018017906604

R. Osinski, A. Dalphinet, L. Aouf, P. Palany

引用次数: 2

Fishing operations to catch tuna on aggregated schools at the vicinity of a data buoy in the Western Equatorial Atlantic 在西赤道大西洋一个数据浮标附近的聚集鱼群上捕捞金枪鱼的捕鱼行动

Brazilian Journal of Oceanography Pub Date : 2018-12-01 DOI: 10.1590/S1679-87592018018206604

Guelson Batista da Silva, H. Hazin, P. V. N. Araújo

引用次数: 5

Use of a species-rich and degraded tropical estuary by Elasmobranchs 一种物种丰富和退化的热带河口的利用

Brazilian Journal of Oceanography Pub Date : 2018-12-01 DOI: 10.1590/S1679-87592018020106604

Fernanda Gonçalves-Silva, M. Vianna

引用次数: 7

The role of plant-crab interaction in structuring microphytobenthic communities in a shallow temperate estuary 浅温带河口植物-螃蟹相互作用在构建微底栖生物群落中的作用

Brazilian Journal of Oceanography Pub Date : 2018-09-01 DOI: 10.1590/S1679-87592018018906603

C. Fernández, Constanza Da-Rodda, M. Gauna, M. Croce, E. Parodi

引用次数: 2

Subtidal soft sediments of the Paranaguá Bay inlet: mapping habitats and species distribution at a landscape scale 帕拉纳瓜<e:1>湾入口的潮下软沉积物:景观尺度上的栖息地和物种分布

Brazilian Journal of Oceanography Pub Date : 2018-09-01 DOI: 10.1590/S1679-875920180192406603

Orlei Antonio Negrello-Filho, Juan Carlos Ugaz-Codina, Luiz Henrique Sielski de Oliveira, M. C. Souza, R. J. Angulo

{"title":"Subtidal soft sediments of the Paranaguá Bay inlet: mapping habitats and species distribution at a landscape scale","authors":"Orlei Antonio Negrello-Filho, Juan Carlos Ugaz-Codina, Luiz Henrique Sielski de Oliveira, M. C. Souza, R. J. Angulo","doi":"10.1590/S1679-875920180192406603","DOIUrl":"https://doi.org/10.1590/S1679-875920180192406603","url":null,"abstract":"This study aimed to map habitats and species distribution in a benthoscape section of the Paranaguá Bay inlet, Paraná State, Southern Brazil. The degree of correspondence between maps independently generated through sidescan imagery and macrofauna and sediment samples was also evaluated. The study area had approximately 9km2 and was chosen considering both diverse landscape features and proximity to future port developments. Sampling was performed in 67 evenly distributed and unreplicated sites. Patterns related to backscatter intensity (high and low) and the presence or absence of bedforms were observed, as well as other large-scale features like sand waves and beach rock outcrops. Local sedimentary environments were represented in a mosaic used for comparisons with sedimentary and faunistic data. Cluster analysis using grain size data formed four groups with similar particle size distribution. A strong correspondence between habitats and grain size distribution was found in only one habitat class. Macrofauna around the deeper Poço Point region and the Mel Island shallower banks presented high species richness and number of individuals. These were considered habitats of high biological relevance. Regions with bedforms indicate higher rates of sand transport in which a few species can thrive. The navigation channel had the lowest number of species and individuals when compared to vicinal regions, indicating persistent impacts. The study evidenced local estuarine bottom heterogeneity and contributed to the understanding of local processes of both bottom sediments dynamics and their associate faunal components. AbstrAct Orlei Antonio Negrello-Filho1,2* , Juan Carlos Ugaz-Codina2, Luiz Henrique Sielski de Oliveira1, Maria Cristina de Souza1, Rodolfo José Angulo1","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/S1679-875920180192406603","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47731568","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