Brazilian Journal of Oceanography最新文献_第10页

Shallow gas seismic structures: forms and distribution on Santa Catarina Island, Southern Brazil 巴西南部圣卡塔琳娜岛浅层气震构造的形成与分布

Brazilian Journal of Oceanography Pub Date : 2016-12-01 DOI: 10.1590/S1679-87592016115506404

A. Klein, Larissa F. Demarco, Vanessa Guesser, Gabriela Reis Flemming, J. Bonetti, Diego Porpilho, A. A. Neto, Jorge Souza, C. A. Felix

{"title":"Shallow gas seismic structures: forms and distribution on Santa Catarina Island, Southern Brazil","authors":"A. Klein, Larissa F. Demarco, Vanessa Guesser, Gabriela Reis Flemming, J. Bonetti, Diego Porpilho, A. A. Neto, Jorge Souza, C. A. Felix","doi":"10.1590/S1679-87592016115506404","DOIUrl":"https://doi.org/10.1590/S1679-87592016115506404","url":null,"abstract":"This paper presents the spatial distribution of shallow gas structures and classifies them on the basis of two different data sets of CHIRP seismic records, one from the Conceicao Lagoon (CL) and the other from North Bay (NB), both on Santa Catarina Island, Southern Brazil. Side scan sonar data from the CL were used to facilitate the understanding. The sub bottom (SB) seismic data were processed and interpreted by means of the SeisPrho software, the side scan sonar (SSS) data by SonarWiz5 software and the spatial extension being measured with the help of GIS. The shallow gas structures were defined in accordance with their shapes in the seismic recordings (echo-character). At the CL, shallow gas accumulations were found in the form of seepages and features presenting shallow gas structures between the surface and 8.20 ms (around 12.3 m). Accumulations of gas were found in the form of Acoustic Blanking with Acoustic Plume, and also Black Shadows. Pockmarks were found on the lagoon floor and associated with gas seepages (average size diameter 0.97 ± 0.19 m and density from 54 to 242 units per 50 m","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"64 1","pages":"325-338"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/S1679-87592016115506404","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67424579","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: 7

Mapping goliath grouper aggregations in the southwestern Atlantic 绘制大西洋西南部歌利亚石斑鱼聚集的地图

Brazilian Journal of Oceanography Pub Date : 2016-12-01 DOI: 10.1590/S1679-87592016122906404

Vinicius J. Giglio, J. R. Leite, M. Freitas, M. Hostim-Silva

{"title":"Mapping goliath grouper aggregations in the southwestern Atlantic","authors":"Vinicius J. Giglio, J. R. Leite, M. Freitas, M. Hostim-Silva","doi":"10.1590/S1679-87592016122906404","DOIUrl":"https://doi.org/10.1590/S1679-87592016122906404","url":null,"abstract":"(Lichtenstein, 1822), is the largest reef fish in the western Atlantic Ocean, reaching up to 2.5 meters long and > 400 kg (BULLOCK et al., 1992). The species matures at 5-8 years with a maximum age of 37 years (BULLOCK et al., 1992). Some characteristics of goliath grouper that make them particularly vulnerable to overfishing include their large body size, slow growth, high longevity, late maturity, and the formation of predictable seasonal spawning aggregations (SADOVY; EKLUND, 1999). Consequently, the species has suffered sharp population declines across its entire distribution range (CRAIG et al., 2009; McCLENACHAN, 2009; GIGLIO et al., 2015) and currently is classified as Critically Endangered by the International Union for the Conservation of Nature (CRAIG, 2011). In Brazil, the species have been fully protected by a federal law since 2002, however, illegal fisheries threaten the population’s recovery (GIGLIO et al., 2014a).During the reproductive season, goliath grouper form relatively small (10 to 100 individuals) spawning aggregations (SADOVY; EKLUND, 1999) with individuals migrating distances up to 300 km to specific spawning areas (PINA-AMARGOS; GONZALEZ-SANSON, 2009). Data on the spatial and temporal distributions of spawning aggregations are mostly available for the northern hemisphere (SADOVY; EKLUND, 1999; MANN et al., 2009; KOENIG et al., 2011; 2016). In Brazil, anecdotal reports of aggregation sites have been described using fishers’ knowledge (GERHARDINGER et al., 2009; FERREIRA et al., 2014) and","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"25 1","pages":"423-426"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67424453","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: 11

Abandoned, lost or otherwise discarded fishing gears in rocky reefs of Southern Brazil 在巴西南部的礁石中，被遗弃、丢失或以其他方式丢弃的渔具

Brazilian Journal of Oceanography Pub Date : 2016-12-01 DOI: 10.1590/S1679-87592016124806404

Johnatas Adelir-Alves, G. Rocha, Thiago Felipe Souza, P. C. Pinheiro, K. Freire

{"title":"Abandoned, lost or otherwise discarded fishing gears in rocky reefs of Southern Brazil","authors":"Johnatas Adelir-Alves, G. Rocha, Thiago Felipe Souza, P. C. Pinheiro, K. Freire","doi":"10.1590/S1679-87592016124806404","DOIUrl":"https://doi.org/10.1590/S1679-87592016124806404","url":null,"abstract":"The intense exploitation of fishing resources has led the activity into a global crisis. However, fishing effort continues to increase despite the collapse of some of the main fish stocks (FAO, 2014). This increasing effort produces both direct and indirect impact on marine ecosystems (PAULY et al., 2002). Marine debris resulting from abandoned, lost or otherwise discarded fishing gear (ALDFG) (LAIST, 1995; MACFADYEN et al., 2009) is one type of indirect impact, responsible for harming marine fauna and for causing economic loss (DAYTON et al., 1995).ALDFG captures target and non-target fish species by a phenomenon known as ‘ghost fishing’, which means that the fishing gear continues to catch fish even though fishers are no longer controlling it (SMOLOWITZ, 1978). The term is associated with mortality and injuries inflicted on vertebrates and invertebrates caught by ALDFG (BREEN, 1987; BARREIROS; RAYKOV, 2014).At least one-third of the Brazilian coast consists of reef environments, with coral reefs concentrated on the northern/northeastern coast and rocky reefs on the southeastern/southern coast. These ecosystems are highly diverse, rich in natural resources and of great ecological, economic and social importance, with immense potential for hosting endemic species (FERREIRA et al., 2001; ROCHA, 2003). There are few studies on the impact of ghost fishing in Brazil, many of them reporting the existence of marine debris and fishing gear found in coastal areas (MACHADO; FILLMANN, 2010; MASCARENHAS et al., 2008; POSSATTO et al., 2011; VIEIRA et al., 2011; DANTAS et al","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"64 1","pages":"427-434"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67424963","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: 18

Differences in the distribution and abundance of Teredinidae (Mollusca: Bivalvia) along the coast of Rio de Janeiro state, Brazil 巴西巴西里约热内卢州海岸terindiidae(软体动物纲:双壳亚目)分布和丰度的差异

Brazilian Journal of Oceanography Pub Date : 2016-12-01 DOI: 10.1590/S1679-87592016127806404

Gustavo C Maldonado, L. Skinner

{"title":"Differences in the distribution and abundance of Teredinidae (Mollusca: Bivalvia) along the coast of Rio de Janeiro state, Brazil","authors":"Gustavo C Maldonado, L. Skinner","doi":"10.1590/S1679-87592016127806404","DOIUrl":"https://doi.org/10.1590/S1679-87592016127806404","url":null,"abstract":"Teredinidae are wood-boring mollusks found in marine and estuarine regions. Evaluation of the distribution and abundance of Teredinidae is a very important task, as the impact of the destruction of wood in man-made structures is still underestimated, mainly in tropical regions. It is also know that temperature and salinity are key factors affecting the abundance and activity of Teredinidae due to their effects on the physiological responses of Teredinidae. The aim of this study was to evaluate the distribution and abundance of Teredinidae along the Rio de Janeiro coast according to temperature range and pattern. Artificial pine collectors were used and remained immersed for three months in four regions at 14 sites. We recorded seven species of Teredinidae, identified according to their pallets. Ilha Grande Bay was the region with the highest density and species richness, and the region with the lowest was Guanabara Bay. One gradient of abundance related to temperature was found. The most abundant species were Lyrodus floridanus and Teredo furcifera. Besides temperature, wood availability among regions was another important factor. For the first time, we recorded the occurrence of Bankia destructa on the Rio de Janeiro coast, but this record does not indicate any species introduction or expanding distribution range.","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"325 1","pages":"375-386"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/S1679-87592016127806404","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67425212","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: 5

Octopus insularis (Cephalopoda: Octopodidae) on the tropical coast of Brazil: where it lives and what it eats 巴西热带海岸的岛章鱼(头足纲:章鱼科):它生活的地方和它吃什么

Brazilian Journal of Oceanography Pub Date : 2016-12-01 DOI: 10.1590/S1679-87592016123406404

Allan T. Batista, T. Leite

引用次数: 16

Seasonal influence of drifting seaweeds on the structure of fish assemblages on the eastern equatorial Brazilian coast 漂浮海藻对巴西东赤道海岸鱼类群落结构的季节性影响

Brazilian Journal of Oceanography Pub Date : 2016-12-01 DOI: 10.1590/S1679-87592016124006404

N. Dantas, C. A. D. S. Júnior, C. Feitosa, P. Carneiro

{"title":"Seasonal influence of drifting seaweeds on the structure of fish assemblages on the eastern equatorial Brazilian coast","authors":"N. Dantas, C. A. D. S. Júnior, C. Feitosa, P. Carneiro","doi":"10.1590/S1679-87592016124006404","DOIUrl":"https://doi.org/10.1590/S1679-87592016124006404","url":null,"abstract":"The present study compared fish assemblages in two adjacent areas, one with drifting algae (A) and another without it (WA), in order to assess seasonal changes in diversity and composition. Both areas were located in Sao Cristovao beach, Rio Grande do Norte state, on the semi-arid North-Northeastern coast of Brazil. A total of 4988 individuals were caught, the most species-rich families being Scianidae, Ariidae, Engraulidae and Carangidae. Species richness and abundance were slightly higher in site A, but diversity and evenness were higher in site WA. However, with the exception of evenness, such differences were not significant at any time during the study. Species composition was also similar between the two sites over the year. Nevertheless, in spite of the similarities, seasonal changes of environmental conditions, particularly rainfall, seemed to influence fish assemblages differently in the two areas. This may have led to changes in assemblage structure, causing the differentiation of the communities in the dry season. The present study presents evidence that fish assemblages in habitats with and without drifting seaweeds are not static and may become more similar or different, depending on the environmental conditions, suggesting that there is a complex relationship between primary productivity, trophic level and the structure of fish assemblages.","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"64 1","pages":"365-374"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67424825","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: 5

Effects of structural factors on upwelling fouling community, Southeast Brazil 结构因素对巴西东南部上升流污染群落的影响

Brazilian Journal of Oceanography Pub Date : 2016-12-01 DOI: 10.1590/S1679-87592016128706404

B. Masi, I. Zalmon, R. Coutinho

{"title":"Effects of structural factors on upwelling fouling community, Southeast Brazil","authors":"B. Masi, I. Zalmon, R. Coutinho","doi":"10.1590/S1679-87592016128706404","DOIUrl":"https://doi.org/10.1590/S1679-87592016128706404","url":null,"abstract":"To assess the successional pattern of fouling organisms three hypotheses were tested: 1) a thermocline is caused by seasonal upwelling events, and therefore, depth influences the successional trajectory of the fouling community; 2) a reduction in the intensity of natural light of the substrate influences the fouling composition and the successional trajectory; 3) fish predation influences the community composition and its successional trajectory. During one year, up-facing and down-facing PVC panels on open, partially caged or fully caged, and placed at depths of 1.5 and 3.5 meters were monthly sampled by digital photograph to determine the community composition and by contact point to estimate the percent coverage of organisms. The upwelling impact provided different water masses, and light intensity was also a determining factor of the overall successional trajectory of the fouling community. After the installation of full and partial cages, differences were identified in the respective successional trajectories. The results of this study suggest that each physical factor or biological process can change the successional trajectory of the community, and the successional model (e.g., convergent, divergent, parallel, or cyclic) depends on the magnitudes of the determinants that act on the community at each stage of its trajectory.","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"64 1","pages":"387-400"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67425017","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: 6

Feeding ecology of the common bottlenose dolphin, Tursiops truncatus, in southern Brazil: analyzing its prey and the potential overlap with fisheries 巴西南部常见宽吻海豚(Tursiops truncatus)的摄食生态学:分析其猎物及其与渔业的潜在重叠

Brazilian Journal of Oceanography Pub Date : 2016-12-01 DOI: 10.1590/S1679-87592016116406404

L. Milmann, D. Danilewicz, R. Machado, Roberta A. Santos, P. H. Ott

{"title":"Feeding ecology of the common bottlenose dolphin, Tursiops truncatus, in southern Brazil: analyzing its prey and the potential overlap with fisheries","authors":"L. Milmann, D. Danilewicz, R. Machado, Roberta A. Santos, P. H. Ott","doi":"10.1590/S1679-87592016116406404","DOIUrl":"https://doi.org/10.1590/S1679-87592016116406404","url":null,"abstract":"(Montagu 1821), is of worldwide distribution in tropical and temperate regions in both coastal and oceanic waters (WELLS; SCOTT, 2009). In the Southwestern Atlantic Ocean (SWA), the species occurs from the northern Brazilian coast (SICILIANO et al., 2008) to Tierra del Fuego, Argentina (GOODALL et al., 2011).Despite the wide distribution of the species in the SWA, information on the bottlenose dolphin’s feeding habits in this region is relatively sparse. Only a comparatively small number of specimens thus far been analyzed in the few studies published to date, mainly in southeastern Brazil (DI BENEDITTO et al., 2001; GURJAO et al., 2004; SANTOS; HAIMOVICI, 2001, SANTOS et al., 2002; MELO et al., 2010).In the southern most areas of the Brazilian shore, the bottlenose dolphin is commonly sighted very close to the shore, usually within less than 0.5 nm of it, and inside estuaries and river mouths (e.g. SIMOES-LOPES, 1991; DI TULLIO et al., 2015). In some of these estuaries, bottlenose dolphins cooperate with the artisanal fishermen’s fishing activity, mainly during the mullet (","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"64 1","pages":"415-422"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67424614","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: 16

Macrobenthos of the coastal Budi Lagoon, southern Chile: Changes associated with seasonal environmental variation 智利南部沿海布迪泻湖的大型底栖动物:与季节环境变化相关的变化

Brazilian Journal of Oceanography Pub Date : 2016-09-01 DOI: 10.1590/S1679-87592016113306403

C. Bertrán, P. Fierro, Elizabeth Encalada, F. Peña-Cortés, J. Tapia, E. Hauenstein, L. Vargas-Chacoff

{"title":"Macrobenthos of the coastal Budi Lagoon, southern Chile: Changes associated with seasonal environmental variation","authors":"C. Bertrán, P. Fierro, Elizabeth Encalada, F. Peña-Cortés, J. Tapia, E. Hauenstein, L. Vargas-Chacoff","doi":"10.1590/S1679-87592016113306403","DOIUrl":"https://doi.org/10.1590/S1679-87592016113306403","url":null,"abstract":"The purpose of the present study was to investigate the seasonal relationship of macrobenthos richness and abundance with sediment characteristics (i.e. texture and organic material) for the coastal Budi Lagoon in southern Chile. Physicochemical measurements and macrobenthos samples were taken over the course of a year at nine sampling stations. Sandy-muddy sediment was the most common, and high percentages of organic material were registered, varying significantly between seasons and stations. The recorded organic material was related to natural (resident wild birds) and anthropogenic (agriculture) sources. Regarding fauna, 28 benthonic taxa and 7092 individuals were identified, with temporal and spatial variations. The most abundant taxa year-round were the molluscs Littoridina cumingii and Kingiella chilenica and the bristle worm Prionospio patagonica. Together, the obtained results evidence the important impact of organic material on the macrobenthos, with macrobenthic richness and abundance decreasing in conditions of high organic material content. The recorded variations for different taxa may indicate a response to the land use around the Budi Lagoon, which is intensely subjected to agricultural and tourist activities.","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"64 1","pages":"239-248"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67424404","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: 5

Distribution of the species of Lucifer Thompson, 1829 in the subtropical South Atlantic between parallels 20º and 30ºs 路西法汤普森的种类分布，1829年在副热带南大西洋平行线20度和30度之间

Brazilian Journal of Oceanography Pub Date : 2016-09-01 DOI: 10.1590/S1679-87592016099006403

A. Marafon-Almeida, J. B. Pereira, L. Fernandes

{"title":"Distribution of the species of Lucifer Thompson, 1829 in the subtropical South Atlantic between parallels 20º and 30ºs","authors":"A. Marafon-Almeida, J. B. Pereira, L. Fernandes","doi":"10.1590/S1679-87592016099006403","DOIUrl":"https://doi.org/10.1590/S1679-87592016099006403","url":null,"abstract":"A distribuicao das especies de Lucifer Thompson, 1829 (Decapoda: Luciferidae) no Giro Subtropical do Atlântico Sul foi avaliada pela Comissao Transatlântico Brasil I, entre novembro e dezembro de 2009. As amostras foram coletadas em 83 estacoes, em dois perfis entre o Brasil e Africa (20o e 30o Sul). Foram realizados arrastos obliquos com rede cilindro-conica, ate 150 metros de profundidade. Observou-se uma relacao sexual distinta entre as duas especies encontradas. L. faxoni apresentou numero de femeas significativamente maior em relacao aos machos: 1:0.5 (X2 = 21,77, p = 0,0001), enquanto L. typus, teve proporcao sexual de machos significativamente maior que de femeas: 1.86:1 (X2 = 50,84, p = 0,0001). A distribuicao de L. typus variou entre as porcoes oeste e leste da cordilheira Mesoceânica. Essa distribuicao esteve relacionada significativamente com a salinidade (R2 = 0.13; F(3.79); p = 0,009), mais elevada a oeste da area de estudo. No presente trabalho as duas especies tiveram seus registros ampliados para o Giro Subtropical do Atlântico. De forma geral, os camaroes luciferideos foram mais frequentes e abundantes nas estacoes de coleta a oeste da Cordilheira Mesoceância, com L. typus sendo mais representativo tanto em abundância quanto em ocorrencia.","PeriodicalId":55325,"journal":{"name":"Brazilian Journal of Oceanography","volume":"64 1","pages":"217-226"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1590/S1679-87592016099006403","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67422624","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