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  • General relativity, gravitation  (650)
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  • 1
    Publication Date: 2021-05-19
    Description: Over the last decade eutrophication of freshwater artificial reservoirs in Cuba occurred in parallel to oligotrophication of estuarine and coastal waters. These two processes influenced both freshwater and marine fisheries. A dramatic shift in species composition in freshwater fisheries has occurred, from dominance by cichlids (tilapia) to dominance by cyprinids. The high fishery yield from some reservoirs, and shift in species composition, seems related to progressive eutrophication of reservoirs by nutrient subsidies from different anthropogenic activities; particular those related to the size of urban areas within their watersheds. On the other hand, marine landings of estuarine-dependent species declined more significantly than for other groups associated with seagrass beds–coral reefs and oceanic waters. The ratio between catches of estuarine-dependent species and those associated with seagrass beds and coral reefs, decreased significantly over the last 20 years. The decrease in landings was more evident in typical estuarine species, such as shrimps (Litopenaeus schmitti and Farfantopenaeus notialis), mangrove oyster (Crassostrea rhizophorae) and mullets (Mugil spp.). River damming increased during the same period and is significantly correlated with these decreases. It is hypothesized that two different processes acted synergistically, leading to dramatic decreases of several orders of magnitude, in the catches of estuarine species over the last decade: the trapping of nutrients and sediments by river damming, and a drastic reduction in nutrient inputs from land-based sources due to reduced fertilizer use. These are postulated to have affected not only estuarine resources, but also the whole coastal ecosystem.
    Description: Durante la última década, la eutrofización de los embalses artificiales de agua dulce en Cuba se produjo en paralelo a oligotrophication de estuarios y costeras aguas. Estos dos procesos de influencia de agua dulce y la pesca marina. Un cambio dramático en la composición de las especies en la pesca de agua dulce se ha producido, de la dominación de los cíclidos (tilapia) a la dominación de ciprínidos. La alta producción de la pesca de algunos embalses, y el cambio en las especies composición, parece relacionada con la progresiva eutrofización de los embalses de las subvenciones de nutrientes de diferentes actividades antropogénicas, especialmente las relacionado con el tamaño de las zonas urbanas dentro de sus cuencas. Por otro lado, los desembarques de especies marinas de estuario-dependientes disminuyeron significativamente más que para otros grupos asociados con algas marinas Los arrecifes de coral-camas y las aguas oceánicas. La relación entre las capturas de las especies que dependen de los estuarios y las asociadas a las praderas marinas y Los arrecifes de coral, se redujo significativamente en los últimos 20 años. La disminución en los desembarques fue más evidente en especies típicas de estuarios, tales como camarones (Litopenaeus schmitti y Farfantopenaeus notialis), ostra de mangle (Crassostrea rhizophorae) y la lisa (Mugil spp.). El represamiento del Río aumentó durante el mismo período y se correlaciona significativamente con estas disminuciones. Se planteó la hipótesis de que dos procesos diferentes actúan de forma sinérgica, que conduce a una disminución drástica de varios órdenes de magnitud, en las capturas de las especies de estuario en la última década: la captura de nutrientes y sedimentos por represas río, y una reducción drástica de los aportes de nutrientes de fuentes terrestres, debido a la reducción del uso de fertilizantes. Se postula que han afectado no sólo a los recursos estuarinos, sino también todo el ecosistema costero.
    Description: Published
    Description: ríos
    Description: impactos antropogénicos
    Keywords: river ; Fisheries ; Eutrophication
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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  • 2
    Publication Date: 2021-05-19
    Description: Se muestra la evolución de las capturas de las sierras y pintadas, se describen las 3 maneras en que las especies pueden quedar atrapadas en la redes de enmalles, así como también los tipos de redes (deriva, media agua y de fondo).
    Description: Published
    Description: Scomberomorus regalis
    Description: Scomberomorus maculatus
    Description: Scomberomorus cavalla
    Description: spanish mackerel
    Description: king mackerel
    Description: painted mackerel
    Description: enmalle
    Description: arte de pesca
    Keywords: Fisheries ; Artisanal fishing
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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  • 3
    Publication Date: 2021-05-19
    Description: Published
    Description: Mugil curema
    Description: Mugil liza
    Description: Mugil cephalus
    Description: Gerres cinereus
    Description: patao
    Description: coastal lagoons
    Keywords: Mullet fisheries ; Fisheries
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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  • 4
    Publication Date: 2021-05-19
    Description: Ce travail représente une contribution à l'étude de l'activité de pêche hauturière dans le gouvernorat de Médenine, particulièrement, au niveau du port de Zarzis ; durant la période (juin 2005-juin 2006). Il consiste à réaliser, grâce à des enquêtes menées au port, deux types d'analyses : une analyse quantitative afin de déterminer les débarquements saisonniers moyens des espèces les plus débarquées par la pêche hauturière et une analyse qualitative pour établir les structures démographiques des espèces les plus exploitées dans la région. Les résultats obtenus ont montré que, durant la période d'étude, les principales espèces débarquées par la pêche hauturière sont la sardinelle, le maquereau, le saurel, le rouget blanc, le pageot, la thonine, la seiche et la crevette royale. En examinant les débarquements saisonniers moyens des espèces les plus débarquées par type de pêche, nous avons remarqué que deux ou trois espèces dominent pour chaque saison. De plus, l'analyse des structures démographique des apports a montré que la majorité des individus débarqués sont matures, à l’exception du maquereau dont les captures sont constituées d’individus immatures, surtout pendant les saisons d’été et d’automne.
    Description: This work represents a contribution to the study of the offshore fishing activity in the governorate of Medenine, particularly at the port of Zarzis, during the period (june 2005-june 2006. It is to realize, through surveys conducted at the port, two types of analyzes: a quantitative analysis to determine the average seasonal landings of most landed species by fishing offshore units and qualitative analysis to determine the demographic structure of the most exploited species in the region. The obtained results showed that during the period of study, the main landed species by offshore fishing are sardinella, mackerel, horse mackerel, white mullet, sea bream, skipjack tuna, cuttlefish and the caramote prawn. By examining the average seasonal landings of the most landed species, we noticed that, for each season, two or three species dominate. Furthermore, analysis of demographic structures of the landings showed that the majority of landed individuals are mature, with the exception of mackerel catches which are composed of immature individuals, especially during the seasons of summer and autumn.
    Description: Published
    Description: analyse qualitative
    Description: pêche hauturière
    Keywords: Quality analysis ; Offshore ; Fisheries
    Repository Name: AquaDocs
    Type: Proceedings Paper , Refereed , Meeting abstract
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  • 5
    Publication Date: 2021-05-19
    Description: Se muestran las capturas históricas de la biajaiba (1935-2000), la evolución de las capturas del pargo (una de las especies de mayor interés económico en Cuba). Se evalúa la utilización de éstas artes de pesca en especies comerciales y su implicación con daños al medio ambiente. Se tiene en cuenta que los pargos criollos, la biajaiba y el caballerote representan el 20 % de las capturas.
    Description: Published
    Description: pesquería artesanal
    Description: cubera
    Description: cherna criolla
    Description: pesca del alto
    Description: pargo
    Description: rabirrubia
    Description: caballerote
    Description: biajaiba
    Keywords: Fisheries ; Artisanal fishing
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 6
    Publication Date: 2021-05-19
    Description: Un análisis de los datos arqueológicos e históricos sobre la pesca en Cuba muestra que el impacto de la población aborigen sobre los recursos pesqueros no fue significativo debido a su baja densidad poblacional y a las tecnologías de pesca. El interés por el oro, el tamaño de la población, las limitaciones tecnológicas para la pesca y preservación de las capturas así como las preferencias dietéticas de los españoles todas indican que la pesca tampoco fue una actividad económica importante durante los tres siglos que siguieron a la llegada de Colón. Las preferencias por la carne de res y el bacalao salado y la baja tasa de crecimiento poblacional durante el período colonial determinaron que la mayor parte de los recursos pesqueros, con la excepción del manatí y las tortugas marinas, permanecieran prácticamente inexplorados durante varios siglos después de la Conquista. Los datos estadísticos e históricos revelan que la pesca experimentó un rápido crecimiento desde 1950 y este patrón parece ser una característica común en el Caribe así como en otras partes del mundo. Las presiones sobre la vida marina fueron más evidentes en la segunda mitad del siglo xx cuando el crecimiento poblacional, las mejoras tecnológicas y las demandas del mercado aceleraron el sector pesquero así como la urbanización en la mayoría de los países del caribe.
    Description: Published
    Keywords: Integrated management ; Fisheries
    Repository Name: AquaDocs
    Type: Proceedings Paper , Refereed , Article
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  • 7
    Publication Date: 2021-05-19
    Description: A yield per recruit model has been used to compare the effects of mesh size increment on the yields and revenues of the fisheries of Cameroon under two different cases. Case 1 assumes the commercial fishery to move from the exploitation of three age-groups to two age-groups with no interactions with the artisanal fishery, whereas Case 2 takes into account these interactions. The difference in the percentage increase of yield per recruit between case 1 and case 2 is 61% at current fishing (46% and 18% yield per recruit increment in cases 1 and 2 respectively). The usually accepted long-term yield per recruit increment with increase of age at first capture (with a single non-interacting fisheries) is, in this case, cancelled out. However, the revenues increase by 72% and 63% in cases 1 and 2 respectively. Therefore the economic approach, compared with purely biological analyses, is more convincing. In general, as fisheries always interact, a single-fishery management approach should not be the rule as it is at present; management strategies should consider interactions between different fisheries and be based on their economic performances and not, as said earlier, on purely biological considerations. This is because a biological approach to fisheries management will, at best, be modified by economic factors, or, at worst, be ignored totally in favour of economic policies.
    Description: Published
    Keywords: Biology ; Fisheries ; Biological interaction ; Sciaenidae ; Fisheries development ; Fishery management ; Yield/recruit ; Commercial fisheries ; Artisanal fishing
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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  • 8
    Publication Date: 2021-05-19
    Description: La pêche au Sénégal joue un rôle économique et social très important par une contribution globale de près de 11% du PIB primaire et 2,3% du PIB total. Elle occupe de façon directe et indirecte environ 600 000 personnes, soit près de 17% de la population active selon la DP M. Cependant ces dernières décennies, les études ont montré que le secteur traverse une crise aiguë se traduisant par une raréfaction croissante des ressources, notamment les espèces nobles qui ont une forte valeur commerciale. Cette crise est due entre autres à une surexploitation de ces ressources qui est le résultat d’un manque de maîtrise de l’effort de pêche surtout pour les pêcheries artisanales (80% des débarquements et plus de 60% des approvisionnements des industries de la place) au regard du volume de ressources disponibles. Ce manque de maîtrise est dû essentiellement par un défaut du suivi contrôle et surveillance au niveau de la pêche artisanale par l’Etat, qui n’a pas les moyens humains et matériels pour appliquer des mesures de gestion, qui pour la plupart ne sont pas adaptées aux réalités des acteurs à la base. L’objet de cette étude est d’analyser une nouvelle approche axée sur la surveillance participative basée sur l’émergence d’initiatives locales de cogestion au niveau des quatre (04) sites du programme GIRMaC que sont ; Ouakam, Ngaparou, Foundiougne et Bétenty. Il ressort de cette étude que : • Le secteur de la pêche traverse une crise aiguë due principalement selon les acteurs à un défaut de suivi, contrôle et surveillance tel que appliqué actuellement ; • L’approche de cogestion avec des bases juridiques cohérentes, comme le propose le programme GIRMaC peut être un moyen viable pour solutionner à la crise que traverse la pêche ; • D’une part le système Suivi Contrôle et Surveillance coûte cher, d’autre part que ces coûts sont fortement amoindris lorsque les acteurs participent à l’effort de surveillance, par une démarche de surveillance participative en cogestion.
    Description: Président : Omar Thiom THIAW, Professeur UCAD Membres : • Niokhor DIOUF, Chercheur IUPA. • Luis Tito Morais, Chercheur IRD Dakar. • Djiby THIAM, Chercheur GIRMac
    Description: Published
    Description: surveillance; contrôle; cogestion; effort de pêche; pêcherie; surexploitation; biodiversité; pêche artisanale
    Keywords: Ocean surveillance ; Ecosystem management ; Fishing effort ; Overexploitation ; Biodiversity ; Artisanal fishing ; Fisheries
    Repository Name: AquaDocs
    Type: Theses and Dissertations , Master thesis
    Format: 87
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  • 9
    Publication Date: 2021-05-19
    Description: Published
    Description: espéces pélagiques
    Description: sardine
    Description: pêche industrielle
    Keywords: Fisheries ; Pelagic fisheries ; Industrial fish ; Fish products ; Fishing industry ; Fishing fleet
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 10
    Publication Date: 2021-05-19
    Description: Unpublished
    Description: conservation
    Description: chaine froide
    Description: poisson
    Keywords: Food conservation ; Fisheries ; Fish conversion ; Conservation (fishery products) ; Glass ; Fisheries
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 11
    Publication Date: 2021-05-19
    Description: Published
    Description: Pêche
    Description: Senneur
    Keywords: Seining ; Fisheries ; Fisheries ; Seiners
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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  • 12
    Publication Date: 2021-05-19
    Description: ACDI;CRDI; République Française, Ministère des Affaires Etrangéres; CDE; Enda Graf Sahel;
    Description: Conseil Info MPEA, Projer d'Accés à l'information et au Conseil pour les microet petites entreprises agroalimentaires; Projet d'Appui aux Opérateurs/trices de l'Agroalimentaires (PAOA); Cintech Agroalimentaire; Groupe de Recherche et d'Echanges Technologiques (GRET); Enda GRaf Sahel; SNC-LAVALIN International
    Description: Published
    Description: transformation; transformation artisanale; échantillonage; collecte de données; commercialisation
    Keywords: Processing fishery products ; Biological sampling ; Data collections ; Marketing and distribution ; Fisheries
    Repository Name: AquaDocs
    Type: Theses and Dissertations , Master thesis
    Format: 41
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  • 13
    Publication Date: 2021-05-19
    Description: Français - Les traits essentiels de la côte sénégalaise, repères historiques de la pêche, communautés de pêcheurs, caractéristiques des flottes et modes d’accès à la ressource et d’interaction sont analysés. Les caractéristiques, tendances décroissantes de l’abondance,niveaux d’exploitation, mesures d’aménagement, relations interspécifiques, changements potentiels et sources de variation des stocks démersaux côtiers sont précisés. Les notions de tactiques et stratégies de pêche sont passées en revue, conceptualisées puis étudiées.Le modèle «Dynamique Conjointe Exploitation Ressource» utilisé repose sur la définition de 4 typologies. L’utilisation de méthodes de classification et de connaissances d’experts conduit à considérer 32 stocks, 31 strates, 82 tactiques et 25 flottilles artisanales et chalutières. Les typologies sont articulées avec la prise en compte de paramètres relatifs à l’économie, aux stocks, flottilles et règles de décisions. L’ajustement est satisfaisant en partie. Toutefois, le modèle garde son importance en matière de prospective et d’objectifs à atteindre via la définition de variables de contrôle. Notre travail peut être considéré comme une esquisse invitant à un groupe de travail élargi aux experts des institutions halieutiques nationales voire, sous-régionales. Des propositions sont faites sur les bases de données, les licences de pêche et l’étude des tactiques et stratégies à mener suivant des pas de temps raisonnables pour tenir compte du grand dynamisme des pêcheries. Dès lors qu'il s’agit de caractériser l'impact de la pêche sur l'écosystème, ces travaux sont des éléments essentiels des recherches à faire sur la dynamique des écosystèmes exploités. English - The essential features of the Senegalese coast, fisheries history, fishermen's communities, artisanal and trawling fleet’s characteristics and their way of accessing to the resource and interactions are described. The characteristics, evolutionary tendencies of abundance, level of exploitation, measures of fisheries management, interspecific relationship, potential evolutionary changes and sources of variation of coastal demersal stocks are specified. Tactics and strategies are reviewed, conceptualized and studied. We used the model "Dynamique Conjointe Exploitation Ressource" which lies on 32 stocks, 31 strata, 82 tactics, 25 fleets and several other parameters dealing with stocks, fleets, economy and making decision rules. The adjustment is partially satisfactory but the model is of great interest for prospective studies and objectives to reach once defined variables of control. Our work is an outline calling for an enlarged working group implying national or sub regional fisheries institutional experts. Tactics and strategies studies, re-actualized in artisanal fisheries, are performed for the first time in industrial fisheries. The typological approach is simple, pertinent, efficacy and fast. Propositions are made relatively to databases, fishing licenses and tactics and strategies studies that should be implemented according to a reasonable time steps in order to take into account the big dynamism of the Senegalese fisheries. As it is intended to characterize fisheries impact on ecosystem, these works are one of essential research elements on the dynamic of exploited ecosystems.
    Description: Published
    Description: pêcherie; démersale côtière; modélisation; stocks; écosystème; communauté de pêcheurs; eaux continentales; eaux marines; saison hydrologique; pêcheur; flottille; crevettier; capture; aménagement des pêcheries; pêche chalutière; pêche artisanale; licence de pêche; permis de pêche
    Keywords: Fisheries ; Demersal fisheries ; Modelling ; Stocks ; Ecosystems ; Community fishing ; Inland waters ; Marine water ; Hydrologic cycle ; Fishermen ; Fishing fleet ; Shrimp fisheries ; Capture fisheries ; Fisheries management ; Trawling ; Artisanal fishing ; Fishing licenses
    Repository Name: AquaDocs
    Type: Theses and Dissertations , Bachelor thesis
    Format: 234
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  • 14
    Publication Date: 2021-05-19
    Description: Published
    Description: conservation
    Description: produits
    Description: pêche
    Keywords: Conservation ; Fisheries ; Fish products
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 15
    Publication Date: 2022-05-25
    Description: Author Posting. © Ecological Society of America, 2013. This article is posted here by permission of Ecological Society of America for personal use, not for redistribution. The definitive version was published in Ecological Applications 23 (2013): 959–971, doi:10.1890/12-0447.1.
    Description: The biological benefits of marine reserves have garnered favor in the conservation community, but “no-take” reserve implementation is complicated by the economic interests of fishery stakeholders. There are now a number of studies examining the conditions under which marine reserves can provide both economic and ecological benefits. A potentially important reality of fishing that these studies overlook is that fishing can damage the habitat of the target stock. Here, we construct an equilibrium bioeconomic model that incorporates this habitat damage and show that the designation of marine reserves, coupled with the implementation of a tax on fishing effort, becomes both biologically and economically favorable as habitat sensitivity increases. We also study the effects of varied degrees of spatial control on fisheries management. Together, our results provide further evidence for the potential monetary and biological value of spatial management, and the possibility of a mutually beneficial resolution to the fisherman–conservationist marine reserve designation dilemma.
    Description: M. G. Neubert acknowledges the support of the National Science Foundation (DMS-0532378, OCE-1031256) and a Thomas B. Wheeler Award for Ocean Science and Society. H. V. Moeller acknowledges support from a National Science Foundation Graduate Research Fellowship. This research is based in part on work supported by Award No. USA 00002 made by King Abdullah University of Science and Technology (KAUST).
    Keywords: Bioeconomics ; Destructive fishing practices ; Fisheries ; Habitat damage ; Marine protected areas ; Marine reserves ; Optimal control ; Optimal harvesting ; Spatial management
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
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  • 16
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    Ministerio de Medio Ambiente y Medio Rural y Marino | Madrid (Espagne)
    Publication Date: 2021-05-19
    Description: Description du secteur de la pêche Avec la Mauritanie, le Sénégal est de loin le plus grand producteur de produits de pêche de la sous région. Avec 718 km de cote et un territoire maritime de 198km2, 15 745 km2 de superficie fluviale, 2 estuaires, des mangroves et un lac de 350km2, le Sénégal possède tous les atouts des plus grands producteurs de pêche. Le potentiel annuel de captures s’élève à 500 000 tonnes. Le secteur a subi une croissance spectaculaire ces trente dernières années : les débarquements sont passés 50 000 tonnes en 1965 à plus de 450 000 en 1997. Le secteur se compose principalement de deux sous-secteurs : la pêche industrielle et la pêche traditionnelle ou artisanale. Cette dernière, vielle de plusieurs siècles a su s’adapter et se moderniser au cours des dernières décennies. La flotte de pêche artisanale est dynamique et diversifiée ; selon les estimations, en 2005 il y avait plus de 13 000 pirogues. La pêche artisanale se concentre dans sept régions maritimes et fluviales du pays: Dakar, Thiès, Saint Louis, Fatick, Zinguinchor, Louga et Kaolack. Le port de Kayar dans la région de Thiès correspond à la principale zone de débarquement de la pêche artisanale avec environ 70% des débarquements. Dans le secteur industriel, les pêcheurs travaillent à bord d’une flottille de petits sardiniers, de 143 chalutiers destinés à la pêche d’espèces demersales, de 3 sardiniers et de 42 thoniers. Alors que le Sénégal domine largement le sous-secteur demersale avec 70% des chalutiers opérants, le pays ne possède que 6 thoniers contre 38 étrangers, dont une partie seulement des captures est débarquée au Sénégal. La pêche industrielle est concentrée autour de la capitale dans le Port autonome de Dakar et des ports secondaires de Saint Louis, Kaolack et Ziguinchor. Aujourd’hui, le secteur de la pêche sénégalaise est largement dominé par la pêche artisanale, qui constituait 90% des cargaisons totales des produits de la mer en 2006 avec 350 000 tonnes. Plus de 60% des produits de la pêche artisanale sont destinés à l’exportation et la transformation. En 2006, le secteur dans son ensemble représentait 9% du PIB du secteur primaire, 1.5% du PIB total, et 1/3 des devises étrangères (250 millions de dollars par an). Plus importante que le poids économique du secteur, est son poids social : la pêche génère indirectement 600 000 emplois, dont 67% au sein du secteur artisanal. En outre, les produits de la pêche comblent les besoins en protéines animales de la population sénégalaise à hauteur de 75%1. La pêche a connu une expansion spectaculaire au cours des dernières décennies grâce à l’impulsion de politiques publiques de développement basées sur une logique sectorielle productiviste. Une flotte nationale artisanale et industrielle a été progressivement mise en place ainsi que de fortes capacités de transformation industrielle. Cet engagement de l’Etat a ensuite connu un net ralentissement du fait, entre autre, des politiques d’ajustement structurel. Le renchérissement des coûts de production subséquents à la dévaluation du franc CFA en 1994 a lourdement affecté les pêcheurs. Parallèlement, avec la forte demande en produits halieutiques et en l’absence de politiques adéquates et cohérentes de gestion durable des ressources exploitables, une situation de surexploitation des ressources halieutiques s’est installée. En conséquence de la raréfaction des ressources halieutiques, la pêche sénégalaise traverse une crise sans précédent, dont les effets commencent à se faire sentir à tous les niveaux : appauvrissement des communautés de pêcheurs, menace de l’approvisionnement en poisson des populations, baisse des captures à haute valeur ajoutée, baisse des exportations, baisse de la rentabilité et des revenus des unités de pêche. Par ailleurs, de plus en plus d’établissements de transformation industrielle ferment (23 entreprises entre 1999 et 2006).
    Description: Ministerio de Medio Ambiente Y Medio Rural y Marino
    Description: Pablo Manuel Xandri Royo CTP Proyecto (INT/07/16M/SPA) Este trabajo se ha realizado en el marco del Convenio de Colaboración entre el actual Ministerio de Medio Ambiente y Medio Rural y Marino de España y la Organización Internacional del Trabajo de 28 de diciembre de 2007
    Description: Published
    Description: environnement; socio-économie; pêche; capture; débarquement; engin de pêche; femme; pêcheur; convention internationale; réglementation
    Keywords: Fisheries ; Marine environment ; Socioeconomic aspects ; Capture fisheries ; Landing statistics ; Fishing gear ; Women ; Fishermen ; Conventions ; Fishery regulations
    Repository Name: AquaDocs
    Type: Report , Non-Refereed
    Format: 208
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  • 17
    Publication Date: 2021-05-19
    Description: Programme KURUKAN FUGAN (Union Européenne/Gouvernement du Sénégal/EndaGraf/GRET)
    Description: Published
    Description: politique de pêche; environnement marin; socio-économie; co-gestion; aquaculture; pêche artisanale; pêche industrielle; pêcherie; ONG; AMP; ressource halieutique; organisations professionnelles
    Keywords: Marine environment ; Socioeconomic aspects ; Fishery management ; Aquaculture ; Artisanal fishing ; Fisheries ; Industrial fish ; Fishery resources ; Fishing policy ; Protected areas ; Professionals
    Repository Name: AquaDocs
    Type: Book , Non-Refereed , Article
    Format: 26
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  • 18
    Publication Date: 2021-09-18
    Description: En la época colonial algunas especies de peces cubanos retienen sus nombres por los cuales eran conocidos por los aborígenes: biajaca, biajaiba, cojinúa, jiguagua, cibí. Aún hoy se designan de igual forma. En esta época aparece la primera obra científica impresa en Cuba, los primeros pueblos pescadores y los primeros científicos.
    Description: Published
    Keywords: Fisheries
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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  • 19
    Publication Date: 2021-09-18
    Description: Published
    Description: especies nativas
    Description: pesca
    Keywords: Fisheries ; Indigenous species ; Indigenous fishing
    Repository Name: AquaDocs
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  • 20
    Publication Date: 2021-09-18
    Description: Published
    Keywords: Fisheries
    Repository Name: AquaDocs
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  • 21
    Publication Date: 2021-09-18
    Description: Recuento en forma breve de las pesquerías de estas especies durante varios siglos, en los cuales los sabios Parra y Felipe Poey ofrecen descripciones. Precios, lugares de captura y pescadores son los protagonistas.
    Description: Published
    Description: Emperador-Xiphias gladius
    Description: pez espada
    Description: castero-Makaira nigricans
    Description: aguja blanca-Tetrapturus albidus
    Keywords: Fisheries ; Fishes
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 22
    Publication Date: 2021-09-18
    Description: Causas del descenso en las pesquerías de estas especies a partir de 1975. Se describen las técnicas y artes de pesca empleadas y se abunda en la complejidad de las capturas y las características de los palangres empleados para cada especie. Una comparación es establecida además con países del área. De forma muy didáctica e instructiva.
    Description: Published
    Description: castero-Makaira nigricans
    Description: Emperador-Xiphias gladius
    Description: aguja blanca-Tetrapturus albidus
    Keywords: Fisheries ; Fishes
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 23
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    American Physical Society (APS)
    Publication Date: 2013-09-10
    Description: Author(s): Sandipan Sengupta Motivated by a recent proposal (by Koslowski-Sahlmann) of a kinematical representation in loop quantum gravity (LQG) with a nondegenerate vacuum metric, we construct a polymer quantization of the parametrized massless scalar field theory on a Minkowskian cylinder. The diffeomorphism covariant kinema... [Phys. Rev. D 88, 064016] Published Mon Sep 09, 2013
    Keywords: General relativity, gravitation
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  • 24
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    American Physical Society (APS)
    Publication Date: 2013-09-12
    Description: Author(s): Florian Kühnel Stability about cosmological background solutions to the bimetric Hassan-Rosen theory is studied. The results of this analysis are presented, and it is shown that a large class of cosmological backgrounds is classically unstable. This sets serious doubts on the physical viability of the Hassan-Rosen... [Phys. Rev. D 88, 064024] Published Wed Sep 11, 2013
    Keywords: General relativity, gravitation
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  • 25
    Publication Date: 2013-09-14
    Description: Author(s): Nicolai Friis, Antony R. Lee, and Jorma Louko We analyze quantized scalar, spinor, and photon fields in a mechanically rigid cavity that is accelerated in Minkowski spacetime, in a recently introduced perturbative small-acceleration formalism that allows the velocities to become relativistic, with a view to applications in relativistic quantum ... [Phys. Rev. D 88, 064028] Published Fri Sep 13, 2013
    Keywords: General relativity, gravitation
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  • 26
    Publication Date: 2013-09-18
    Description: Author(s): Caio F. B. Macedo, Luiz C. S. Leite, Ednilton S. Oliveira, Sam R. Dolan, and Luís C. B. Crispino We consider planar massless scalar waves impinging upon a Kerr black hole, for general angles of incidence. We compute the absorption cross section via the partial wave approach, and present a gallery of results. In the low-frequency regime, we show that the cross section approaches the horizon area... [Phys. Rev. D 88, 064033] Published Tue Sep 17, 2013
    Keywords: General relativity, gravitation
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  • 27
    Publication Date: 2013-09-18
    Description: Author(s): Wilson G. Brenna, Eric G. Brown, Robert B. Mann, and Eduardo Martín-Martínez We explore the effects of different boundary conditions and coupling schemes on the response of a particle detector undergoing uniform acceleration in optical cavities. We analyze the thermalization properties of the accelerated detector via nonperturbative calculations. We prove nonperturbatively t... [Phys. Rev. D 88, 064031] Published Tue Sep 17, 2013
    Keywords: General relativity, gravitation
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  • 28
    Publication Date: 2013-09-20
    Description: Author(s): J. L. Hernandez-Pastora, L. Herrera, and J. Ospino We analyze the behavior of the geodesic motion of test particles in the spacetime of a specific class of axially symmetric static vacuum solutions to the Einstein equations, hereafter referred to as the linearized multipole solution. We discuss its suitability to describe a quasispherical spacetime.... [Phys. Rev. D 88, 064041] Published Thu Sep 19, 2013
    Keywords: General relativity, gravitation
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  • 29
    Publication Date: 2013-09-20
    Description: Author(s): Inyong Cho and Hyeong-Chan Kim We present a new manifestation of the nonlinearity of gravity-matter interactions. We show explicitly that there exists a nongravitating dynamical scalar field solution in Eddington-inspired Born-Infeld gravity. This kind of solution has not been found in previous literature based on general relativ... [Phys. Rev. D 88, 064038] Published Thu Sep 19, 2013
    Keywords: General relativity, gravitation
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  • 30
    Publication Date: 2013-09-20
    Description: Author(s): José P. S. Lemos and Gonçalo M. Quinta The thermodynamic equilibrium states of a static thin ring shell in a (2+1)-dimensional flat spacetime is analyzed. Inside the ring the spacetime is flat, whereas outside it is conical flat. The first law of thermodynamics applied to the thin shell leads to a shell’s entropy, which is a function of ... [Phys. Rev. D 88, 067501] Published Thu Sep 19, 2013
    Keywords: General relativity, gravitation
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  • 31
    Publication Date: 2013-09-24
    Description: Author(s): Abhay Ashtekar, Miguel Campiglia, and Samir Shah Since black holes can be formed through widely varying processes, the horizon structure is highly complicated in the dynamical phase. Nonetheless, as numerical simulations show, the final state appears to be universal, well described by the Kerr geometry. How are all these large and widely varying d... [Phys. Rev. D 88, 064045] Published Mon Sep 23, 2013
    Keywords: General relativity, gravitation
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  • 32
    Publication Date: 2013-09-24
    Description: Author(s): Majd Abdelqader and Kayll Lake The Kerr metric is one of the most important solutions to Einstein’s field equations describing the gravitational field outside a rotating black hole. We thoroughly analyze the curvature scalar invariants to study the Kerr spacetime by examining and visualizing their covariant gradient fields. We di... [Phys. Rev. D 88, 064042] Published Mon Sep 23, 2013
    Keywords: General relativity, gravitation
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  • 33
    Publication Date: 2013-09-27
    Description: Author(s): Giorgos G. Anastasiou, M. R. Setare, and Elias C. Vagenas In this paper, we consider the structure of the AdS 3 vacua in R 3 expansion of new massive gravity ( R 3 -NMG). We obtain the degeneracies of the AdS 3 vacua at several points of the parametric space. Additionally, following a specific analysis we show that AdS 3 wave solutions are present. Using these wa... [Phys. Rev. D 88, 064054] Published Thu Sep 26, 2013
    Keywords: General relativity, gravitation
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  • 34
    Publication Date: 2013-09-27
    Description: Author(s): Shahar Hod A charged scalar field impinging upon a charged Reissner–Nordström black hole can be amplified as it scatters off the hole, a phenomenon known as super-radiant scattering. This scattering process in the super-radiant regime ω 〈 q Q / r + (here ω , q , Q , and r ± are the conserved frequency of the wave, th... [Phys. Rev. D 88, 064055] Published Thu Sep 26, 2013
    Keywords: General relativity, gravitation
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  • 35
    Publication Date: 2013-09-28
    Description: Author(s): Songbai Chen and Jiliang Jing We present firstly the master equation of an electromagnetic perturbation with Weyl correction in the four-dimensional black hole spacetime, which depends not only on the Weyl correction parameter, but also on the parity of the electromagnetic field. It is quite different from that of the usual elec... [Phys. Rev. D 88, 064058] Published Fri Sep 27, 2013
    Keywords: General relativity, gravitation
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  • 36
    Publication Date: 2013-09-28
    Description: Author(s): Raphael Bousso, Ben Freivogel, Stefan Leichenauer, Vladimir Rosenhaus, and Claire Zukowski We investigate the nature of the AdS/CFT duality between a subregion of the bulk and its boundary. In global AdS/CFT in the classical G N =0 limit, the duality reduces to a boundary value problem that can be solved by restricting to one-point functions of local operators in the conformal field theory ... [Phys. Rev. D 88, 064057] Published Fri Sep 27, 2013
    Keywords: General relativity, gravitation
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  • 37
    Publication Date: 2013-09-28
    Description: Author(s): Laura Sampson, Nicolás Yunes, and Neil Cornish Several model-independent parametrizations of deviations from general relativity have been developed to test Einstein’s theory. Although these different parametrizations were developed for different gravitational observables, they ultimately all test the same underlying physics. In this paper, we de... [Phys. Rev. D 88, 064056] Published Fri Sep 27, 2013
    Keywords: General relativity, gravitation
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  • 38
    Publication Date: 2013-10-02
    Description: Author(s): C. Barrabès and P. A. Hogan Postcollision space-times of the Cartesian product form M ′ × M ′′ , where M ′ and M ′′ are two-dimensional manifolds, are known with M ′ and M ′′ having constant curvatures of equal and opposite sign (for the collision of electromagnetic shock waves) or of the same sign (for the collision of gravitational s... [Phys. Rev. D 88, 087501] Published Tue Oct 01, 2013
    Keywords: General relativity, gravitation
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  • 39
    Publication Date: 2013-10-02
    Description: Author(s): Stephen R. Taylor and Jonathan R. Gair We present the results of simulated injections testing the first Bayesian search pipeline capable of investigating the angular structure of a gravitational-wave (GW) background influencing pulsar signals. A stochastic background of GWs from the incoherent superposition of many inspiraling supermassi... [Phys. Rev. D 88, 084001] Published Tue Oct 01, 2013
    Keywords: General relativity, gravitation
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  • 40
    Publication Date: 2013-10-03
    Description: Author(s): Gregory Gabadadze, Kurt Hinterbichler, David Pirtskhalava, and Yanwen Shang The unique ghost-free mass and nonlinear potential terms for general relativity are presented in a diffeomorphism and local Lorentz invariant vierbein formalism. This construction requires an additional two-index Stückelberg field, beyond the four scalar fields used in the metric formulation, and un... [Phys. Rev. D 88, 084003] Published Wed Oct 02, 2013
    Keywords: General relativity, gravitation
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  • 41
    Publication Date: 2013-10-03
    Description: Author(s): Eugeny Babichev and Marco Crisostomi We study static spherically symmetric solutions of massive bigravity theory, free from the Boulware-Deser ghost. We show the recovery of general relativity via the Vainshtein mechanism, in the weak limit of the physical metric. We find a single polynomial equation determining the behavior of the sol... [Phys. Rev. D 88, 084002] Published Wed Oct 02, 2013
    Keywords: General relativity, gravitation
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  • 42
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    American Physical Society (APS)
    Publication Date: 2013-09-11
    Description: Author(s): Steven B. Giddings If quantum mechanics governs nature, black holes must evolve unitarily, providing a powerful constraint on the dynamics of quantum gravity. Such evolution apparently must in particular be nonlocal, when described from the usual semiclassical geometric picture, in order to transfer quantum informatio... [Phys. Rev. D 88, 064023] Published Tue Sep 10, 2013
    Keywords: General relativity, gravitation
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  • 43
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    American Physical Society (APS)
    Publication Date: 2013-09-11
    Description: Author(s): S. Habib Mazharimousavi and M. Halilsoy We present a solution for the Einstein-Maxwell equations which unifies both the magnetic Bertotti-Robinson and Melvin solutions as a single metric in the axially symmetric coordinates { t , ρ , z , φ }. Depending on the strength of magnetic field the spacetime manifold, unlike the cases of separate Bertotti... [Phys. Rev. D 88, 064021] Published Tue Sep 10, 2013
    Keywords: General relativity, gravitation
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  • 44
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    American Physical Society (APS)
    Publication Date: 2013-09-14
    Description: Author(s): Takashi Arai We investigate nonperturbative infrared effects for the O ( N ) linear sigma model in de Sitter space using the two-particle irreducible effective action at the Hartree truncation level. This approximation resums the infinite series of so-called superdaisy diagrams. For the proper treatment of ultravio... [Phys. Rev. D 88, 064029] Published Fri Sep 13, 2013
    Keywords: General relativity, gravitation
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  • 45
    Publication Date: 2013-09-14
    Description: Author(s): Takashi Torii and Hisa-aki Shinkai We derive the simplest traversable wormhole solutions in n -dimensional general relativity, assuming static and spherically symmetric space-time with a ghost scalar field. This is the generalization of the Ellis solution (or the so-called Morris-Thorne’s traversable wormhole) into a higher dimension.... [Phys. Rev. D 88, 064027] Published Fri Sep 13, 2013
    Keywords: General relativity, gravitation
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  • 46
    Publication Date: 2013-09-18
    Description: Author(s): I. V. Tanatarov and O. B. Zaslavskii The Bañados-Silk-West effect consists in the possibility to obtain arbitrarily large energy E c.m. in the center of mass frame of two colliding particles near the black hole horizon. One of the common beliefs was that the action of force on these particles (say, due to gravitational radiation) should... [Phys. Rev. D 88, 064036] Published Tue Sep 17, 2013
    Keywords: General relativity, gravitation
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  • 47
    Publication Date: 2013-09-18
    Description: Author(s): Claudio Bunster, Marc Henneaux, and Sergio Hörtner The linearized Einstein equations in D spacetime dimensions can be written as twisted self-duality equations expressing that the linearized curvature tensor of the graviton described by a rank-2 symmetric tensor is dual to the linearized curvature tensor of the “dual graviton” described by a tensor ... [Phys. Rev. D 88, 064032] Published Tue Sep 17, 2013
    Keywords: General relativity, gravitation
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  • 48
    Publication Date: 2013-09-18
    Description: Author(s): S. Bellucci and A. A. Saharian We evaluate the two-point functions of the electromagnetic field in ( D +1)-dimensional spatially flat Friedmann–Robertson–Walker universes with a power-law scale factor, assuming that the field is prepared in the Bunch–Davies vacuum state. The range of powers is specified in which the two-point funct... [Phys. Rev. D 88, 064034] Published Tue Sep 17, 2013
    Keywords: General relativity, gravitation
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  • 49
    Publication Date: 2013-09-18
    Description: Author(s): Elcio Abdalla, Owen Pavel Fernandez Piedra, Fidel Sosa Nuñez, and Jeferson de Oliveira We study the complete time evolution of scalar fields propagating in spacetimes of higher-dimensional Lifshitz black holes with the dynamical critical exponent z =2, obtained from a theory including the most general quadratic curvature corrections to Einstein-Hilbert gravity in D dimensions. We also ... [Phys. Rev. D 88, 064035] Published Tue Sep 17, 2013
    Keywords: General relativity, gravitation
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  • 50
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    American Physical Society (APS)
    Publication Date: 2013-09-19
    Description: Author(s): Bahram Mashhoon and Yuri N. Obukhov We discuss the motion of spin in inertial and gravitational fields. The coupling of spin with rotation and the gravitomagnetic field has already been extensively studied; therefore, we focus here on the inertial and gravitational spin-orbit couplings. In particular, we investigate the classical and ... [Phys. Rev. D 88, 064037] Published Wed Sep 18, 2013
    Keywords: General relativity, gravitation
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  • 51
    Publication Date: 2013-09-20
    Description: Author(s): Claes Uggla In this paper we investigate the global dynamics for the minimally coupled scalar field representation of the modified Chaplygin gas in the context of flat Friedmann-Lemaître-Robertson Walker cosmology. The tool for doing this is a new set of bounded variables that lead to a regular dynamical system... [Phys. Rev. D 88, 064040] Published Thu Sep 19, 2013
    Keywords: General relativity, gravitation
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  • 52
    Publication Date: 2013-09-20
    Description: Author(s): Valeri P. Frolov We start with formulation of the generalized Fermat’s principle for light propagation in a curved spacetime. We apply Pontryagin’s minimum principle of the optimal control theory and obtain an effective Hamiltonian for null geodesics in a curved spacetime. We explicitly demonstrate that dynamical eq... [Phys. Rev. D 88, 064039] Published Thu Sep 19, 2013
    Keywords: General relativity, gravitation
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  • 53
    Publication Date: 2013-09-24
    Description: Author(s): Koray Düztaş and İbrahim Semiz It has been argued that, starting with a slightly subextremal Kerr black hole instead of an extremal one, it is possible to overspin a black hole past the extremal limit and turn it into a naked singularity by sending test bodies, if one neglects radiative and self-force effects. In this work we sho... [Phys. Rev. D 88, 064043] Published Mon Sep 23, 2013
    Keywords: General relativity, gravitation
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  • 54
    Publication Date: 2013-09-26
    Description: Author(s): Lasma Alberte and Andrei Khmelnitsky We consider the nonlinear massive gravity as a theory of a number of Stückelberg scalar fields minimally coupled to the Einstein-Hilbert gravity and argue that the counting of degrees of freedom can be done for scalar theory and gravity separately. In this paper we investigate the system with only t... [Phys. Rev. D 88, 064053] Published Wed Sep 25, 2013
    Keywords: General relativity, gravitation
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  • 55
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    American Physical Society (APS)
    Publication Date: 2013-09-26
    Description: Author(s): Nicola Tamanini and Tomi S. Koivisto Theories with a nonminimal coupling between the space-time curvature and matter fields introduce an extra force due to the nonconservation of the matter energy momentum. In the present work the theoretical consistency of such couplings is studied using a scalar field Lagrangian to model the matter c... [Phys. Rev. D 88, 064052] Published Wed Sep 25, 2013
    Keywords: General relativity, gravitation
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  • 56
    Publication Date: 2013-09-26
    Description: Author(s): Roman Gold and Bernd Brügmann We perform a parameter study of nonspinning, equal- and unequal-mass black hole binaries on generic, eccentric orbits in numerical relativity. The linear momentum considered ranges from that of a circular orbit to ten times that value. We discuss the different manifestations of zoom-whirl behavior i... [Phys. Rev. D 88, 064051] Published Wed Sep 25, 2013
    Keywords: General relativity, gravitation
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  • 57
    Publication Date: 2013-10-01
    Description: Author(s): Daniel J. D’Orazio and Janna Levin As a black hole and neutron star approach during inspiral, the field lines of a magnetized neutron star eventually thread the black hole event horizon and a short-lived electromagnetic circuit is established. The black hole acts as a battery that provides power to the circuit, thereby lighting up th... [Phys. Rev. D 88, 064059] Published Mon Sep 30, 2013
    Keywords: General relativity, gravitation
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  • 58
    Publication Date: 2013-10-01
    Description: Author(s): Petr Tsatsin and Pedro Marronetti The starting point of any general relativistic numerical simulation is a solution of the Hamiltonian and momentum constraints that (ideally) represents an astrophysically realistic scenario. We present a new method to produce initial data sets for binary neutron stars with arbitrary spins and orbita... [Phys. Rev. D 88, 064060] Published Mon Sep 30, 2013
    Keywords: General relativity, gravitation
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  • 59
    Publication Date: 2013-10-04
    Description: Author(s): Richard A. Battye and Jonathan A. Pearson We consider a class of phenomenological modified gravity models where the terms added to the standard Einstein-Hilbert Lagrangian are just a function of the metric only. For linearized perturbations around an isotropic space-time, this class of models is entirely specified by a rank-4 tensor that en... [Phys. Rev. D 88, 084004] Published Thu Oct 03, 2013
    Keywords: General relativity, gravitation
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  • 60
    Publication Date: 2013-10-05
    Description: Author(s): Tanja Hinderer, Alessandra Buonanno, Abdul H. Mroué, Daniel A. Hemberger, Geoffrey Lovelace, Harald P. Pfeiffer, Lawrence E. Kidder, Mark A. Scheel, Bela Szilagyi, Nicholas W. Taylor, and Saul A. Teukolsky We compute the periastron advance using the effective-one-body formalism for binary black holes moving on quasicircular orbits and having spins collinear with the orbital angular momentum. We compare the predictions with the periastron advance recently computed in accurate numerical-relativity simul... [Phys. Rev. D 88, 084005] Published Fri Oct 04, 2013
    Keywords: General relativity, gravitation
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  • 61
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    Publication Date: 2013-10-05
    Description: Author(s): Yun Soo Myung We study the stability of Schwarzschild-Tangherlini (ST) black holes in fourth-order gravity which provides a higher dimensional linearized massive equation. The linearized Ricci tensor perturbations are employed to exhibit unstable modes featuring the Gregory-Laflamme (GL) instability of higher dim... [Phys. Rev. D 88, 084006] Published Fri Oct 04, 2013
    Keywords: General relativity, gravitation
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  • 62
    Publication Date: 2013-06-06
    Description: Author(s): Priscilla Canizares, Scott E. Field, Jonathan R. Gair, and Manuel Tiglio One of the main bottlenecks in gravitational wave (GW) astronomy is the high cost of performing parameter estimation and GW searches on the fly. We propose a novel technique based on reduced order quadratures (ROQs), an application and data-specific quadrature rule, to perform fast and accurate like... [Phys. Rev. D 87, 124005] Published Wed Jun 05, 2013
    Keywords: General relativity, gravitation
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  • 63
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    Publication Date: 2013-06-12
    Description: Author(s): Tim Johannsen According to the no-hair theorem, astrophysical black holes are uniquely described by the Kerr metric. In order to test this theorem with observations in either the electromagnetic or gravitational-wave spectra, several Kerr-like spacetimes have been constructed which describe potential deviations f... [Phys. Rev. D 87, 124010] Published Tue Jun 11, 2013
    Keywords: General relativity, gravitation
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  • 64
    Publication Date: 2013-06-08
    Description: Author(s): E. A. Huerta and Duncan A. Brown Binary neutron stars (BNSs) are the primary source of gravitational waves for the Laser Interferometer Gravitational-Wave Observatory (LIGO) and its international partners Virgo and KAGRA. Current BNS searches target field binaries whose orbits will have circularized by radiation reaction before the... [Phys. Rev. D 87, 127501] Published Fri Jun 07, 2013
    Keywords: General relativity, gravitation
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  • 65
    Publication Date: 2013-06-12
    Description: Author(s): Oleg Yu. Tsupko and Gennady S. Bisnovatyi-Kogan We investigate the influence of plasma presence on relativistic images formed by Schwarzschild black hole lensing. When a gravitating body is surrounded by a plasma, the lensing angle depends on a frequency of the electromagnetic wave due to refraction properties, and the dispersion properties of th... [Phys. Rev. D 87, 124009] Published Tue Jun 11, 2013
    Keywords: General relativity, gravitation
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  • 66
    Publication Date: 2013-06-12
    Description: Author(s): Hiroya Nemoto, Umpei Miyamoto, Tomohiro Harada, and Takafumi Kokubu For particle collision near rapidly rotating Kerr black holes, the center-of-mass energy can be arbitrarily high if the angular momentum of either of the colliding particles is fine-tuned. Recently, it has been shown that particles which are produced by such a particle collision and escape to infini... [Phys. Rev. D 87, 127502] Published Tue Jun 11, 2013
    Keywords: General relativity, gravitation
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  • 67
    Publication Date: 2013-06-11
    Description: Author(s): Tatsuya Narikawa, Tsutomu Kobayashi, Daisuke Yamauchi, and Ryo Saito We explore the possibility of testing modified gravity exhibiting the Vainshtein mechanism against observations of cluster lensing. We work in the most general scalar-tensor theory with second-order field equations (Horndeski’s theory), and derive static and spherically symmetric solutions, for whic... [Phys. Rev. D 87, 124006] Published Mon Jun 10, 2013
    Keywords: General relativity, gravitation
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  • 68
    Publication Date: 2013-06-11
    Description: Author(s): Donato Bini and Thibault Damour We complete the analytical determination, at the 4th post-Newtonian approximation, of the main radial potential describing the gravitational interaction of two bodies within the effective one-body formalism. The (nonlogarithmic) coefficient a 5 ( ν ) measuring this 4th post-Newtonian interaction potenti... [Phys. Rev. D 87, 121501] Published Mon Jun 10, 2013
    Keywords: General relativity, gravitation
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  • 69
    Publication Date: 2013-04-02
    Description: Author(s): Hal M. Haggard and Carlo Rovelli The zeroth principle of thermodynamics in the form “temperature is uniform at equilibrium” is notoriously violated in relativistic gravity. Temperature uniformity is often derived from the maximization of the total number of microstates of two interacting systems under energy exchanges. Here we disc... [Phys. Rev. D 87, 084001] Published Mon Apr 01, 2013
    Keywords: General relativity, gravitation
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  • 70
    Publication Date: 2013-04-02
    Description: Author(s): Masoud Allahverdizadeh, José P. S. Lemos, and Ahmad Sheykhi We construct a new class of perturbative extremal charged rotating black hole solutions in five dimensions in the Einstein-Born-Infeld theory. We start with an extremal five-dimensional Myers-Perry black hole seed in which the two possible angular momenta have equal magnitude, and add a Born-Infeld ... [Phys. Rev. D 87, 084002] Published Mon Apr 01, 2013
    Keywords: General relativity, gravitation
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  • 71
    Publication Date: 2013-04-10
    Description: Author(s): Francesco Cianfrani and Giovanni Montani A procedure to define the Becchi-Rouet-Stora-Tyutin (BRST) charge from the Noether one in extended phase space is given. It is outlined how this prescription can be applied to a Friedmann-Robertson-Walker space-time with a differential gauge condition and it allows us to reproduce the results of Ref... [Phys. Rev. D 87, 084025] Published Tue Apr 09, 2013
    Keywords: General relativity, gravitation
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  • 72
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    Publication Date: 2013-04-10
    Description: Author(s): Xiangdong Zhang, Michal Artymowski, and Yongge Ma The spatially flat and isotropic cosmological model of Brans-Dicke theory with coupling parameter ω ≠-3/2 is quantized by the approach of loop quantum cosmology. An interesting feature of this model is that although the Brans-Dicke scalar field is nonminimally coupled with curvature, it can still pla... [Phys. Rev. D 87, 084024] Published Tue Apr 09, 2013
    Keywords: General relativity, gravitation
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  • 73
    Publication Date: 2013-04-10
    Description: Author(s): Giovanni Amelino-Camelia, Valerio Astuti, and Giacomo Rosati Several approaches to the quantum-gravity problem predict that spacetime should be “fuzzy,” but so far these approaches have been unable to provide a crisp physical characterization of this notion. An intuitive picture of spacetime fuzziness has been proposed on the basis of semiheuristic arguments ... [Phys. Rev. D 87, 084023] Published Tue Apr 09, 2013
    Keywords: General relativity, gravitation
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  • 74
    Publication Date: 2013-04-06
    Description: Author(s): A. Sheykhi and S. H. Hendi A class of higher dimensional rotating solutions in R + f ( R ) theory coupled to a conformally invariant Maxwell field is presented. These solutions have asymptotically anti–de Sitter behavior but exist only for dimensions which are multiples of four. These solutions represent black branes with cylindri... [Phys. Rev. D 87, 084015] Published Fri Apr 05, 2013
    Keywords: General relativity, gravitation
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  • 75
    Publication Date: 2013-04-06
    Description: Author(s): Hajime Sotani, Kostas D. Kokkotas, Pablo Laguna, and Carlos F. Sopuerta Gravitational perturbations of neutron stars and black holes are well-known sources of gravitational radiation. If the compact object is immersed in or endowed with a magnetic field, the gravitational perturbations would couple to electromagnetic perturbations and potentially trigger synergistic ele... [Phys. Rev. D 87, 084018] Published Fri Apr 05, 2013
    Keywords: General relativity, gravitation
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  • 76
    Publication Date: 2013-04-06
    Description: Author(s): Jan Govaerts and Simone Zonetti In the investigation and resolution of the cosmological constant problem, the inclusion of the dynamics of quantum gravity can be a crucial step. In this work we suggest that the quantum constraints in a canonical theory of gravity can provide a way of addressing the issue: we consider the case of t... [Phys. Rev. D 87, 084016] Published Fri Apr 05, 2013
    Keywords: General relativity, gravitation
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  • 77
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    Publication Date: 2013-04-06
    Description: Author(s): J. Klusoň In this short note, we perform the Hamiltonian analysis of bimetric gravity with one particular form of potential between two metrics. We find that this theory has eight secondary constraints. We identify four constraints that are the first-class constraints on condition when the interaction term ob... [Phys. Rev. D 87, 084017] Published Fri Apr 05, 2013
    Keywords: General relativity, gravitation
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  • 78
    Publication Date: 2013-04-09
    Description: Author(s): A. Bonanno and M. Reuter We discuss the stabilization of the conformal factor by higher derivative terms in a conformally reduced R + R 2 Euclidean gravity theory. The flat spacetime is unstable towards the condensation of modes with nonzero momentum, and they “condense” in a modulated phase above a critical value of the coupl... [Phys. Rev. D 87, 084019] Published Mon Apr 08, 2013
    Keywords: General relativity, gravitation
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  • 79
    Publication Date: 2013-04-09
    Description: Author(s): Jorge Bellorín, Alvaro Restuccia, and Adrián Sotomayor We consider a Hořava theory that has a consistent structure of constraints and propagates two physical degrees of freedom. The Lagrangian includes the terms of Blas, Pujolàs, and Sibiryakov. The theory can be obtained from the general Horava’s formulation by setting λ =1/3. This value of λ is protect... [Phys. Rev. D 87, 084020] Published Mon Apr 08, 2013
    Keywords: General relativity, gravitation
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  • 80
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    Publication Date: 2013-04-09
    Description: Author(s): Ewa Czuchry and Włodzimierz Piechocki The mathematical structure of higher-dimensional physical phase spaces of the nondiagonal Bianchi IX model is analyzed in the neighborhood of the cosmological singularity by using dynamical system methods. Critical points of the Hamiltonian equations appear at infinities and are of a nonhyperbolic t... [Phys. Rev. D 87, 084021] Published Mon Apr 08, 2013
    Keywords: General relativity, gravitation
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  • 81
    Publication Date: 2013-04-03
    Description: Author(s): Daniel Flassig, Alexander Pritzel, and Nico Wintergerst It has recently been suggested that black holes may be described as condensates of weakly interacting gravitons at a critical point, exhibiting strong quantum effects. In this paper, we study a model system of attractive bosons in one spatial dimension which is known to undergo a quantum phase trans... [Phys. Rev. D 87, 084007] Published Tue Apr 02, 2013
    Keywords: General relativity, gravitation
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  • 82
    Publication Date: 2013-04-03
    Description: Author(s): Tetsuya Shiromizu and Seiju Ohashi In the Einstein gravity, it is well known that strictly stationary and vacuum regular spacetime should be the Minkowski spacetime. In the Einstein-Gauss-Bonnet theory, we shall show that strictly static (no event horizon), vacuum, and asymptotically flat spacetimes with conformally static slices are... [Phys. Rev. D 87, 087501] Published Tue Apr 02, 2013
    Keywords: General relativity, gravitation
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  • 83
    Publication Date: 2013-04-04
    Description: Author(s): M. H. Dehghani, Ch. Shakuri, and M. H. Vahidinia In this paper, we investigate the thermodynamics of Lifshitz black branes in the presence of a nonlinear massless electromagnetic field. We begin by introducing the appropriate action in grand-canonical and canonical ensembles for a nonlinear electromagnetic field. The condition on the parameters of... [Phys. Rev. D 87, 084013] Published Wed Apr 03, 2013
    Keywords: General relativity, gravitation
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  • 84
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    Publication Date: 2013-09-10
    Description: Author(s): Orest Hrycyna and Marek Szydłowski The dynamics of the Brans-Dicke theory with a scalar field potential function is investigated. We show that the system with a barotropic matter content can be reduced to an autonomous three-dimensional dynamical system. For an arbitrary potential function, we found the values of the Brans-Dicke para... [Phys. Rev. D 88, 064018] Published Mon Sep 09, 2013
    Keywords: General relativity, gravitation
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  • 85
    Publication Date: 2013-09-10
    Description: Author(s): Francois Foucart, Luisa Buchman, Matthew D. Duez, Michael Grudich, Lawrence E. Kidder, Ilana MacDonald, Abdul Mroue, Harald P. Pfeiffer, Mark A. Scheel, and Bela Szilagyi We present the first direct comparison of numerical simulations of neutron star-black hole and black hole-black hole mergers in full general relativity. We focus on a configuration with nonspinning objects and within the most likely range of mass ratio for neutron star-black hole systems ( q =6). In t... [Phys. Rev. D 88, 064017] Published Mon Sep 09, 2013
    Keywords: General relativity, gravitation
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  • 86
    Publication Date: 2013-09-10
    Description: Author(s): Orfeu Bertolami, Riccardo March, and Jorge Páramos We extend the analysis of Chiba et al. [ Phys. Rev. D 75 124014 (2007)] of Solar System constraints on f ( R ) gravity to a class of nonminimally coupled (NMC) theories of gravity. These generalize f ( R ) theories by replacing the action functional of general relativity with a more general form involvin... [Phys. Rev. D 88, 064019] Published Mon Sep 09, 2013
    Keywords: General relativity, gravitation
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  • 87
    Publication Date: 2013-09-11
    Description: Author(s): P. H. Nguyen and J. F. Pedraza Spherical systems with polytropic equations of state are of great interest in astrophysics. They are widely used to describe neutron stars, red giants, white dwarfs, brown dwarfs, main sequence stars, galactic halos, and globular clusters of diverse sizes. In this paper we construct analytically a f... [Phys. Rev. D 88, 064020] Published Tue Sep 10, 2013
    Keywords: General relativity, gravitation
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  • 88
    Publication Date: 2013-09-11
    Description: Author(s): Cosimo Bambi and Daniele Malafarina The nature of the supermassive black hole candidates in galactic nuclei can be tested by analyzing the profile of the K α iron line observed in their x-ray spectrum. In this paper, we consider the possibility that the spacetime in the immediate vicinity of these objects may be described by some nonva... [Phys. Rev. D 88, 064022] Published Tue Sep 10, 2013
    Keywords: General relativity, gravitation
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  • 89
    Publication Date: 2013-09-13
    Description: Author(s): Dirk Puetzfeld and Yuri N. Obukhov We derive multipolar equations of motion for gravitational theories with general nonminimal coupling in spacetimes admitting torsion. Our very general findings allow for the systematic testing of whole classes of theories by means of extended test bodies. One peculiar feature of certain subclasses o... [Phys. Rev. D 88, 064025] Published Thu Sep 12, 2013
    Keywords: General relativity, gravitation
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  • 90
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    Publication Date: 2013-09-13
    Description: Author(s): Steffen Gielen In canonical gravity, the choice of a local time direction is not obviously compatible with local Lorentz invariance. One way to address this issue is to view gravity as a gauge theory on observer space , rather than spacetime. In a Lorentz covariant theory, observer space is the space of unit future... [Phys. Rev. D 88, 064026] Published Thu Sep 12, 2013
    Keywords: General relativity, gravitation
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  • 91
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    Publication Date: 2013-09-17
    Description: Author(s): C. M. Gregory and A. Pinzul We analyze the question of possible quantum corrections in the entropic scenario of emergent gravity. Using a fuzzy sphere as a natural quasiclassical approximation for the spherical holographic screen, we analyze whether it is possible to observe such corrections to Newton’s law in principle. The m... [Phys. Rev. D 88, 064030] Published Mon Sep 16, 2013
    Keywords: General relativity, gravitation
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  • 92
    Publication Date: 2013-09-24
    Description: Author(s): Fabrizio Canfora, Alex Giacomini, and Sergey A. Pavluchenko In this paper we study dynamical compactification in Einstein-Gauss-Bonnet gravity from an arbitrary dimension for generic values of the coupling constants. We show that, when the curvature of the extra-dimensional space is negative, for any value of the spatial curvature of the four-dimensional spa... [Phys. Rev. D 88, 064044] Published Mon Sep 23, 2013
    Keywords: General relativity, gravitation
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  • 93
    Publication Date: 2013-09-24
    Description: Author(s): Caio F. B. Macedo, Paolo Pani, Vitor Cardoso, and Luís C. B. Crispino Compact bosonic field configurations, or boson stars, are promising dark matter candidates which have been invoked as an alternative description for the supermassive compact objects in active galactic nuclei. Boson stars can be comparable in size and mass to supermassive objects, and they might be h... [Phys. Rev. D 88, 064046] Published Mon Sep 23, 2013
    Keywords: General relativity, gravitation
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  • 94
    Publication Date: 2013-09-25
    Description: Author(s): Stefan Hofmann, Florian Niedermann, and Robert Schneider According to folklore in general relativity, the Weyl tensor can be decomposed into parts corresponding to Newton-like, incoming and outgoing wavelike field components. It is shown here that this one-to-one correspondence does not hold for space-time geometries with cylindrical isometries. This is d... [Phys. Rev. D 88, 064047] Published Tue Sep 24, 2013
    Keywords: General relativity, gravitation
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  • 95
    Publication Date: 2013-09-25
    Description: Author(s): Olivier Minazzoli The post-Newtonian parameter γ resulting from a universal scalar-matter coupling is investigated in Brans-Dicke–like scalar-tensor theories where the scalar potential is assumed to be negligible. Conversely to previous studies, we use a perfect fluid formalism in order to get the explicit scalar-fie... [Phys. Rev. D 88, 064050] Published Tue Sep 24, 2013
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  • 96
    Publication Date: 2013-09-25
    Description: Author(s): Daniela Alic, Wolfgang Kastaun, and Luciano Rezzolla Following previous work in vacuum spacetimes, we investigate the constraint-damping properties in the presence of matter of the recently developed traceless, conformal and covariant Z4 (CCZ4) formulation of the Einstein equations. First, we evolve an isolated neutron star with an ideal gas equation ... [Phys. Rev. D 88, 064049] Published Tue Sep 24, 2013
    Keywords: General relativity, gravitation
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  • 97
    Publication Date: 2013-09-25
    Description: Author(s): Paolo Pani, Emanuele Berti, and Leonardo Gualtieri In Einstein-Maxwell theory, according to classic uniqueness theorems, the most general stationary black-hole solution is the axisymmetric Kerr-Newman metric, which is defined by three parameters: mass, spin and electric charge. The radial and angular dependence of gravitational and electromagnetic p... [Phys. Rev. D 88, 064048] Published Tue Sep 24, 2013
    Keywords: General relativity, gravitation
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  • 98
    Publication Date: 2013-09-25
    Description: Author(s): J. Ambjørn and A. Ipsen Two-dimensional causal dynamical triangulations provide a definition of the path integral for projectable two-dimensional Hořava-Lifshitz quantum gravity. We solve the theory coupled to gauge fields. [Phys. Rev. D 88, 067502] Published Tue Sep 24, 2013
    Keywords: General relativity, gravitation
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  • 99
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    Publication Date: 2013-09-25
    Description: Author(s): J. B. Formiga It is well known that the teleparallel equivalent of general relativity yields the same vacuum solutions as general relativity does, which ensures that this particular teleparallel model is in good agreement with experiments. A lesser known result concerns the existence of a wider class of teleparal... [Phys. Rev. D 88, 068501] Published Tue Sep 24, 2013
    Keywords: General relativity, gravitation
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  • 100
    Publication Date: 2013-01-17
    Description: Author(s): Luisa G. Jaime, Leonardo Patiño, and Marcelo Salgado We provide further numerical evidence which shows that R n models in f ( R ) metric gravity produce a late time acceleration in the Universe or a matter domination era (usually a transient one) but not both. Our results confirm the findings of Amendola et al. [ Phys. Rev. Lett. 98 131302 (2007) Phys. ... [Phys. Rev. D 87, 024029] Published Wed Jan 16, 2013
    Keywords: General relativity, gravitation
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