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  • Magnetism  (3,542)
  • Fisheries
  • General Chemistry
  • Inorganic Chemistry
  • 2010-2014  (3,616)
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  • 1
    Publication Date: 2021-05-19
    Description: The genus Ctenochaetus is reportad in the waters of the Colombian Pacific based on two specimens of C. marginatus (Valenciennes) collected in 1993 at Gorgona Island (2°59' N, 78° 12' W). These specimens differ inseveral morphometric characteristics from thosepreviously examined. Such differences appear to be an artifact of the small number of specimens formerly examined and the consequent narrow ranges reportad. We suggest that temperature variability affects the distribution of C. marginatus in the tropical eastern Pacific.
    Description: El género es Ctenochaetus reportad en las aguas del Pacífico colombiano a partir de dos especímenes de C. marginatus (Valenciennes) recogidos en 1993 en la Isla Gorgona (2 ° 59 'N, 78 ° 12' W). Estos ejemplares difieren inseveral características morfométricas de thosepreviously examinados. Estas diferencias parecen ser un artefacto del pequeño número de muestras examinadas anteriormente y reportad los rangos estrechos consecuente. Sugerimos que la variabilidad de la temperatura afecta la distribución de marginatus C en el Pacífico tropical oriental.
    Description: Published
    Keywords: Fisheries ; Fisheries
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 2
    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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  • 3
    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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  • 4
    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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  • 5
    Publication Date: 2021-05-19
    Description: Production of mangrove oyster (Crassostrea rhizophorae Guilding, 1828), north of Villa Clara, Cuba Province, tends to decline since 1980, accentuating from 2003 on. Despite regulations to protect the resource, minimum legal size and catch closures, the year 2008 presents the landing smaller volumes of the past 50 years. An analysis of the variability of catches in relation to natural and human factors, allows for precipitating causes of low productivity of this fishery resource; between the most representatives are expanding storage capacity of river water, salinity increment, the increase in frequency and intensity of hurricanes and the mismanagement of the extraction of oyster.
    Description: La producción de ostión de mangle (Crassostrea rhizophorae, Guilding, 1828), al norte de la provincia de Villa Clara, Cuba, tiende a la disminución desde de 1980, acentuándose a partir del año 2003. A pesar de regulaciones para la protección del recurso, talla mínima legal y vedas de captura, el año 2008 presenta los menores volúmenes de desembarque de los últimos 50 años. Un análisis de la variabilidad de las capturas, en relación con factores naturales y antrópicos, permite establecer causas desencadenantes de la baja productividad de este recurso pesquero; las más representativas son, la ampliación en la capacidad de embalse de aguas fluviales, aumentos de la salinidad, el incremento en la frecuencia e intensidad de los huracanes y un manejo inadecuado de la actividad extractiva de ostión.
    Description: Crassostrea rhizophorae, Cuba
    Keywords: Fisheries ; Environmental effects ; Fisheries
    Repository Name: AquaDocs
    Type: Preprint
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  • 6
    Publication Date: 2021-05-19
    Description: Las capturas de langosta espinosa Panulirus argus (Latreille, 1804) en Cuba alcanzaron sus mayores volúmenes en la década de 1980 con un promedio anual de 11565 ton. En la década de 1990, la captura descendió a un promedio de 9327 ton, lo cual se ha visto agudizado entre 2000 y 2007 con un promedio de 6262 ton y una mayor variabilidad de las capturas, a pesar de un perfeccionamiento del sistema de manejo pesquero dado por: la disminución del esfuerzo pesquero y de la tasa de mortalidad por pesca desde 1999, el aumento del período de veda desde 2001 y el incremento gradual de la talla mínima legal de captura a partir de 2004. Los análisis más recientes sobre el estado de esta pesquería fueron presentados en el Quinto Taller Regional sobre la Evaluación y la Ordenación de la Langosta Común del Caribe en septiembre 2006 (Puga et al, 2006; FAO, 2007), donde se reconoció por la comunidad científica especializada que la pesquería de langosta cubana se encontraba bien manejada y plenamente explotada (no sobre- explotada) y se concluyó que además de la mortalidad por pesca, otros factores ajenos al sector pesquero estaban produciendo afectaciones en la abundancia del recurso, al causar daños al hábitat 1 en zonas de cría, influyendo negativamente por esta vía sobre el reclutamiento y la producción de langostas. Entre estos aspectos para Cuba se señalaron: la mayor frecuencia e intensidad de huracanes durante el último decenio, el desarrollo de las zonas costeras, la construcción de presas en las cuencas de captación de los ríos y de carreteras en el Archipiélago Sabana-Camagüey comunicando la isla principal con los cayos y los cayos entre si (pedraplenes).
    Description: Published
    Keywords: Fisheries ; Lobster fisheries ; Fisheries ; Environment management ; Recruitment ; Coastal zone management
    Repository Name: AquaDocs
    Type: Book Section
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  • 7
    Publication Date: 2021-05-19
    Description: Se efectúa un estudio de la fauna acompañante del Mero, Epinephelus morio, en la pesquería con palangre de fondo del Banco de Campeche, México, durante el periodo 1987-2009. En la investigación se consideró información de 32 cruceros de investigación realizados en la etapa como parte del convenio pesquero firmado por Cuba y México para la evaluación sistemática del recurso. Se determinó la composición por especie y talla de las capturas, sus variaciones en la abundancia relativa, estructura de tallas, así como el índice de diversidad de Brillouin, la riqueza de especies (Margalef, 1980), la dominancia numérica y la constancia, estas ultimas valoradas según el esquema propuesto por Bodenheimer (1955). Se encontró que la fauna acompáñate de E. morio esta representada por 69 especies, agrupadas en 3 clases y 12 órdenes. De ellos, el orden mejor representado lo constituyó Perciformes con las familias Serranidae, Lutjanidae, Scombridae, Carangidae y Haemulidae como las más abundantes en número. Dentro de estas, dominaron las especies L. campechanus y O. chrysurus, apreciándose que las entidades mejor representadas son, L. campechanus (100%), O. chrysurus (96,87%) y M. bonaci (73,2%). Los largos medios observados se encontraron por encima de las tallas de primera maduración reportadas en la literatura. Sólo E. nigritus y L. analis presentaron individuos inmaduros. Se reportan tallas máximas superiores a las reportadas en la bibliografía en M. interstitiaslis (150cm), M. bonací (155cm) y E. nigritus (125cm). Se determinó que el rendimiento (cpue) y la diversidad de la fauna acompañante poseen una relación inversa con la disminución de la biomasa de mero. Por su parte, la diversidad y riqueza de especie presentaron sus mayores valores concordando con las temporadas de lluvias.
    Description: Mero Epinephelus morio, fauna acompañante, Banco de Campeche, México,
    Keywords: Fisheries ; Fauna ; Fisheries ; Fauna
    Repository Name: AquaDocs
    Type: Preprint
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  • 8
    Publication Date: 2021-05-19
    Description: Se presentan los resultados de monitoreo de las poblaciones comerciales de cobo en el área comprendida entre los cayos El Cabezo y Boca de Sagua (220 49`N--230 04`N y los 790 35W—800 07´ `W), plataforma Norte de la Provincia de Villa Clara. A partir de los resultados de las densidades de individuos como índice de la abundancia y la estructura poblacional encontrada, se propone un potencial de captura de 104 TM (peso entero). Además, se definen las medidas de manejo para el uso sostenible del recurso Eustrombus gigas en esta zona. El aprovechamiento en carne desembarcada (Eviscerada y sin manto) para individuos adultos con talla comercial se obtiene por un factor de 0,074 (7,4%) del peso entero, que representa 7,7 TM. Se excluye el área protegida desde Las Picúas hasta Cayo Cristo.
    Description: cobo (Eustrombus gigas), Caibarién, Villa Clara
    Keywords: Monitoring ; Fisheries management ; Fisheries
    Repository Name: AquaDocs
    Type: Preprint
    Format: 4
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  • 9
    Publication Date: 2021-05-19
    Description: La Commission Sous Régionale des Pêches (CSRP), qui est un organisme intergouvernemental de coopération halieutique dont l’objectif global est l’harmonisation à long terme, des politiques des pays membres en matière de préservation, de conservation et d'exploitation durable de leurs ressources halieutiques et le renforcement de leur coopération au profit du bien-être de leurs populations respectives, a obtenu par l’intermédiaire de la Banque mondiale, un Don du Fonds pour l’Environnement Mondial (FEM) et du Gouvernement du Japon, pour la préparation d’un Projet Régional des Pêches en Afrique de l’Ouest (PRAO) pour trouver une solution à la problématique susvisée. Ce projet implique 9 pays côtiers: la Mauritanie, le Cap Vert, le Sénégal, la Gambie, la Guinée Bissau, la Guinée, le Sierra Léone (Etats membres de la CSRP), ainsi que le Libéria et le Ghana. Le PRAO comprend trois composantes : (1) Bonne Gouvernance et Gestion Durable des Pêches ; (2) Réduction de la Pêche Illicite ; (3) Augmentation de la Contribution des Ressources Halieutiques dans les Economies Locales (incluant la réalisation d’infrastructures et équipements dans les pêcheries). Certes, les activités prévues dans le cadre du PRAO sont pressenties pour contribuer au développement du secteur de la pêche dans les pays ciblés et apporter des bénéfices aux populations locales. Toutefois, elles pourraient engendrer dans certains cas des effets négatifs aux niveaux environnemental et social (notamment celles prévues dans la composante 3), si des mesures adéquates ne sont pas prises au préalable. Afin de minimiser ces effets défavorables, il a été requis l’élaboration de la présente Evaluation Environnementale et Sociale (EES).
    Description: Commission Sous Régionale des Pêches (CSRP)
    Description: Published
    Description: ressource marine, ressource côtière, politique de pêhce, environnement, qualité des produits, pollution, gestion des pêches,aire marine protégée
    Keywords: Marine resources ; Fisheries ; Fishery management ; Coastal fisheries ; Quality assurance ; Environment management ; Marine resources ; Fisheries ; Fishery management ; Coastal fisheries ; Coastal zone ; Fishery regulations ; Fishery economics ; Marine pollution ; Quality control ; Illegal fishing ; Fishery organizations ; Quality assurance
    Repository Name: AquaDocs
    Type: Report
    Format: 111
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  • 10
    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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  • 11
    Publication Date: 2021-05-19
    Description: El presente artículo da una descripción detallada de la elaboración y del "curado" de cuerdas de curricán, utilizadas anteriormente para la pesca en Taganga, un pueblo pescador en la costa norte de Colombia. Antes del "curado", estas cuerdas de fibras de algodón y de fabricación industrial, eran o destorcidas o torcidas a mano nuevamente, o tensionadas y envueltas con una cuerda más delgada del mismo material. El "curado" que siguió a estas operaciones se efectuó tanto en una cocción de corteza de las raíces zanconas de mangle, y/o por medio de un frote de estas cuerdas con los hypocotylos del mismo árbol (Rhizophora manglr). Por medio de las técnicas aquí descritas, los pescadores aspiraban a aumentar la resistencia de sus aparejos de pesca en el agua de mar.
    Description: The present paper gives a detailed description of the elaboration and curing of curricán Unes, formerly used as fishing lines in Taganga, a small fishing village on the northem coast of Colombia. These lines, made of cotton fibers and produced industrially, were disassembled and then retwisted by hand, or tightened and then carefully covered with a thinner string of the same material. The curing {"curado") that followed these operations was achieved by immersion of the lines into a boiled infusión of the bark of the prop roots of mangroves (Rhizophora mangle) and/or a rinsing with the hypocotyls of the same trees. By means of the techniques mentioned, the fishermen sought to improve the resistance of their fishing gear to sea water.
    Description: Published
    Keywords: Fisheries ; Fishing ; Gear construction ; Fisheries ; Fishing
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 12
    Publication Date: 2021-05-19
    Description: During a 3 week study, a total of 55 individuals of the redlip blenny (Ophioblennius atlanticus) were observed for at least two 15-minute periods, and several for ten of such periods. The sizes of their territories were estimated, the color pattern of each specimen an intra and interspecific interactions were recorded. The mean territory size of the redlip blenny in the study area appeared to be greater than that of these blennies studied in Curacao and Barbados by NURSALL (1977), the difference reflecting perhaps different methods of identifying the territories or a lower density of O. atlanticus in the Santa Marta área. Territories did not appear to be as consistently defended at the study area as at Barbados/Curacao and our impression ¡s that individuals holding large territories are less likely to defend their borders. It seems possible that light colored individuals are protected by their coloration from attack by dark colored territory owners. In territorial defense the redlip blennies grabbed each other tighthy by the mouth and struggled in this position repeatedly for about 15 seconds. Interspecific antagonism was common in the present study, the redlip blennics defended their territory frequently against Eupomacentrus dorsopunicans or E. partitus.
    Description: Durante un estudio de tres semanas, un total de 5 i individuos del bií'nido Ojih'toblcnnius atlnniicur. fueron observados por lo menos durante dos períodos de 1 í minutos para cada individuo y en algunos casos hasta por 10 de estos periodos. Se estimó el área de sus respectivos territorios y se tomó notí de los patrones de coloración de cada espécimen y de las relaciones intra e interespecificas de ellos. El tamaño promedio del territorio de estos blénidos resultó ser mayor que el de los respectivos territorios estudiados por NURSALL (1977) en Curacao y Barbados. Esta diferencia posiblemente se debe a un método diferente de definir los territorios o refleja una densidad menor de la población de O. aílanticus en Santa Marta, Los territorios del área fueron defendidos con menor intensidad a como lo fueron los de Barbados/ Curacao y es nuestra impresión que individuos ocupando un territorio extenso tienden a defender sus límites en menor grado. El color claro de algunos individuos probablemente los protege de agresiones por parte de individuos de color oscuro. En el acto de defensa territorial intraespecífica, los blénidos se agarran por sus bocas y se sacuden mutuamente durante aproximadamente 15 segundos , pudiéndose repetir esti varias veces. Con frecuencia se observarondefensas de los territorios dirigidas hacia los peces doncella Eupomacentrus dorsopunicnas y E. partitus.
    Description: Published
    Keywords: Fisheries ; Biology ; Fisheries ; Biology
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 13
    Publication Date: 2021-05-19
    Description: Se registra por primera vez el fenómeno de albinismo en la familia de peces Muraenesocidae, con base en dos ejemplares de Cynoponticits savanna capturados en la Península de la Guajira. Caribe colombiano.
    Description: The phenomenom of albinism is reported for the first time in che fish family Muraenesocidae. Two anomalous individuals of Cynoponticus savanna were collected from the Guajira Península colombian Caribbean.
    Description: Published
    Keywords: Fisheries ; Albinism ; Fisheries ; Albinism ; New records
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 14
    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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  • 15
    Publication Date: 2021-05-19
    Description: Se ha estudiado la variación anual de la condición de la lisa Mugil incilis Hancock en la Ciénaga Grande de Santa Marta (CGSM), la mayor laguna costera del Caribe Colombiano, haciendo énfasis en la influencia ejercida por factores ambientales como la salinidad, la temperatura y la transparencia de las aguas sobre la condición de esta especie de Mugilidae. Las diferencias estacionales observadas en la condición de M. incilis están evidentemente relacionadas con su desarrollo gonadal y dependen de la disponibilidad de alimento. La dieta de M. incilis se basa en detritos y su suministro de alimento parece ser muy afectado por el aporte fluvial a la CGSM, el cual es también responsable de los cambios en la salinidad de la laguna, esto explica la relación inversa (r = -0.82) hallada entre la salinidad y la condición de M. incilis expresada por C = 0.9949 - 0.0057 S(°/oo). La variación anual de la salinidad sigue un patrón rítmico de cambios estacionales, no precisamente "in situ", sino en regiones continentales distantes: las cabeceras de los tributarios de la CGSM. Estas lisas desovan en aguas del Caribe adyacente a la CGSM y su período de migración (dic-marzo) comienza con su mejor condición física, y retornan a sus áreas de alimentación en la CGSM 2 a 4 semanas después, hasta el final de la migración, con su condición mínima ya que al parecer estas lisas no se alimentan durante su migración de desove. No se observaron cambios relacionados con las variaciones de la temperatura. Las aguas más turbias coincidieron con los sitios de alimentación de M. incilis.
    Description: The annual variation in condition of the mullet Mugil incilis Hancock has been studied in the Ciénaga Grande de Santa Marta (CGSM). The largest coastal lagoon on the Colombian Caribbean, with emphasis on the influence of such environmental factors as salinity, temperature and transparence of the waters on the condition of this species of Mugilidae. Seasonal differences observed in condition of M. incilis are evidently related to gonadal development and depend on food availability. The diet of M, incilis is based on detritus and its food supply seems to be very influenced by river discharge which also accounts for the salinity changes in the lagoon. this explains the in verse correlation (r = -0.82) found between salinity and condition of the mullets expressed as C = 0.9949 - 0.0057 S (°/oo). Annual salinity variation follows a rhythmic pattern of seasonal changes. not precisely "in situ", but in distant continental regions: the headwaters of the tributarles of the CGSM. These mullets spawn in Caribbean waters adjacent to the CGSM and their migración period (Dec-March) begins with their best physical condición, returning to their feeding áreas in the CGSM 2 or 4 weeks lacer, until the end of the migración, with their lowest condition since these mullets apparently do not feed at all during the spawning migration. No change related to temperature variations was observed. and turbid waters were the rule in M. incilis feeding sites.
    Description: Published
    Description: Mugil incilis
    Keywords: Fisheries ; Estuaries ; Ecology ; Coastal lagoons ; Fishery biology ; Fisheries ; Coastal lagoons ; Estuaries ; Fishery biology ; Ecology
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 16
    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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  • 17
    Publication Date: 2021-05-19
    Description: Se describen y se ilustran seis especies de parásitos pertenecientes a la familia Acanthocolpidae encontradas en 19 especies de peces en su mayoría de considerable importancia económica. El estudio taxonómico de estos parásitos se realizó en la Ciénaga Grande de Santa Marta, al norte de Colombia, desde Enero de 1978 hasta Junio de 1979.
    Description: A taxonomic study for parasites found in 19 mostly economically important fish species was carried out in ihe Ciénaga Grande de Santa Marta (Northern Colombia) from January 1978 uritil June 1979. Six species of fish parasites belonging to the family Acanthocolpidae are described and illustrated herein.
    Description: Published
    Keywords: Fisheries ; Ecology ; Parasites ; Parasites ; Fisheries ; Ecology
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 18
    Publication Date: 2021-05-19
    Description: En 1987, se inicia un programa de muestreos biológicos del calamar argentino ///ex argentinas a bordo de barcos comerciales de la flota cubana de pesca que operan en la plataforma patagónica. La talla de los organismos para ambos sexos presenta un comportamiento estratificado por profundidades, los ejemplares de mayor tamaño se encuentran a profundidades superiores y viceversa, lo cual se ajusta a una recta de regresión (r2 = 0.88; a = 0.05). Las hembras alcanzaron largos promedio del manto superior a los machos, incrementándose la presencia de machos en las capturas desde enero a abril. Se estimaron los largos promedio de primera maduración, como 20.5 y 26.5 cm de largo del manto para machos y hembras respectivamente. Se observó un aumento de la proporción de individuos maduros de febrero a abril, haciéndose más marcado este fenómeno en los machos, que en su mayoría presentaban abundantes espermatóforos en el saco. Se obtuvo la relación largo-peso para hembras y machos y para la combinación de ambos sexos.
    Description: In 1987 a program for the biological sampling of squid ///ex argentinas, was begun on board of a fishing ship belonging to the Cuban Fisheries-Fleet, wich operates in the Patagonian Shelf. The lengths of both sexes presented a estratified pattern with individuals of larger size found in higher depths and viceversa; this pattern is adjusted to a regression line (r2 = 0.88; a = 0.05). Pernales reached average length larger (han males and the rate of males in catches increased from january to april. The first maturation average length was estimated about 20.5 cm for males and 26.5 cm for females. An increase of the rate of mature individuals was observed between february and april emphazasing ¡n males which showed abundant espermatophores in the sac.
    Description: Published
    Description: squid, Flota Cubana
    Keywords: Fisheries ; Squid culture ; Biological charts ; Biological data ; Fisheries ; Squid culture
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 19
    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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  • 20
    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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  • 21
    Publication Date: 2021-01-30
    Description: The first meeting of the South West Indian Ocean EAF Regional Task Group (RTG) was held in Mombasa, Kenya, from 27 to 30 January 2009, together with an ecological risk assessment methodology workshop. It was attended by 20 partic ipants from the South West Indian Ocean (SWIO) countries, the South West Indian Ocean Fisheries Project (SWIOFP), the Agulhas and Somali Currents Large Marine Ecosystems (ASCLME) project, the Scientific Committee of the South West Indian Ocean Fisheries Commission, the United Nations Environment Programme (UNEP)/Nairobi Convention Implementation Unit, the African Union Commission and FAO. The RTG is an implementation structure under the EAF-Nansen project GCP/INT/003/NOR and serves as the forum for training in ecological risk assessment that is the methodology used for the identification and prioritization of issues requiring management attention. The main objectives of the meeting and workshop we re to discuss and facilitate key processes and activities for the implementation of the ecosystem approach to fisheries management in the South West Indian Ocean region including the modalities for the formation and functioning of the RTG and National Task Groups (NTGs). It was explained that, to be able to achieve the objectives of implementing an ecosystem approach to fisheries at the national level, certain key structures have to be in place including the NTG with representatives of key stakeholders in a given fishery and that would take the lead in the process. An overview of the key concepts and process of the ecological risk assessment methodology were clarified. Participants were also introduced to the preparation of EAF baseline reports to be used as initial input for the work on ecosystems approach to fisheries. It was explained that the preparation of the report is to be led by national and regional experts and overseen by the NTG. For the exercises the participants worked in three subgroups formed during the meeting with each group selecting a chairman who moderate d the discussions and a rapporteur. The participants expressed satisfaction with the development of a communication strategy for the project and especially with the participatory approach used.
    Description: FAO, NORAD, Institute of Marine Research
    Description: Published
    Description: National task groups
    Description: Regional task groups
    Description: Ecosystem Approach to Fisheries
    Keywords: Ecosystems ; Fisheries ; Ecosystems ; Fishery resources ; Fisheries management
    Repository Name: AquaDocs
    Type: Report , Non-Refereed
    Format: 36
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  • 22
    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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  • 23
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    Nigerian Institute for Oceanography and Marine Research | Lagos, Nigeria
    Publication Date: 2021-01-30
    Description: Published
    Description: Fisheries newsletter
    Keywords: Fisheries ; Marine sciences ; Fisheries literature
    Repository Name: AquaDocs
    Type: Report , Non-Refereed
    Format: 30pp.
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  • 24
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    Nigerian Institute for Oceanography and Marine Research | Lagos, Nigeria
    Publication Date: 2021-01-30
    Description: Published
    Description: Fisheries newsletter
    Keywords: Fisheries ; Marine sciences ; Fisheries literature
    Repository Name: AquaDocs
    Type: Report , Non-Refereed
    Format: 34pp.
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  • 25
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    Nigerian Institute for Oceanography and Marine Research | Lagos, Nigeria,
    Publication Date: 2021-01-30
    Description: Published
    Description: Fisheries newsletter
    Keywords: Fisheries ; Fisheries literature
    Repository Name: AquaDocs
    Type: Report , Non-Refereed
    Format: 11pp.
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  • 26
    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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  • 27
    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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  • 28
    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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  • 29
    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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  • 30
    Publication Date: 2021-05-19
    Description: Agriculture, Nature and Food Quality, Den Haag (Netherlands); Ministerie Van Buitenlandse Zaken, Brussel (Belgium); Wageningen International, Wageningen (Netherlands)
    Description: Projet BBI 13286 : Pêche durable des petits pélagiques en Afrique Nord Ouest Ce rapport a été préparé avec le soutien financier de la Coopération néerlandaise (DGIS) dans le cadre de son Programme de politique internationale en matière de biodiversité (BBI).
    Description: Published
    Description: pêche traditionnelle; taille; échantillonnage; écosystème; upwelling; biomasse; filet maillant dérivant; senne tournante; senne moustiquaire; senne de plage; maquereau; chinchard; sardinelle; ethmalose; reproduction; courant; stocks; réglementation; pêche par espéce; engin de pêche; pélagique; zone côtière; pirogue; pêche artisanale; pêcheur
    Keywords: Biomass ; Ecosystems ; Fisheries ; Fishermen ; Stocks ; Ocean currents ; Winds ; Size ; Fishing effort ; Pelagic fisheries ; Sexual reproduction ; Multispecies fisheries ; Fisheries ; Artisanal fishing ; Fishermen ; Fishing effort ; Canoe fisheries ; Coastal zone ; Fishery engineering ; Protected resources ; Pelagic fisheries ; Cycles ; Sexual reproduction ; Multispecies fisheries ; Stocks ; Ocean currents ; Winds ; Biomass ; Upwelling ; Ecosystems ; Maritime legislation ; Size
    Repository Name: AquaDocs
    Type: Report
    Format: 53
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  • 31
    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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  • 32
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    Nigerian Institute for Oceanography and Marine Research, | Lagos, Nigeria,
    Publication Date: 2021-01-30
    Description: Published
    Description: Fisheries newsletter
    Keywords: Fisheries ; Fisheries literature
    Repository Name: AquaDocs
    Type: Report , Non-Refereed
    Format: 8pp.
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  • 33
    Publication Date: 2021-01-30
    Description: En Afrique de l'Ouest, la zone littorale et ses ressources représentent une composante essentielle pour le développement. Près de 60% de la population est concentrée à moins de 20 km des côtes . La part des ressources halieutiques dans l'alimentation des populations est très importante et croissante. Au Sénégal par exemple, elles contribuent jusqu'à 70% des apports en protéines. A cela s'ajoute le poids socio-économique très important de la pêche en général et de la pêche artisanale en particulier devenue l'un des secteurs les plus stratégiques pour l'économie nationale en Mauritanie notamment. Le Cadre Stratégique de Lutte contre la Pauvreté du Gouvernement Mauritanien considère que : "compte tenu des possibilités qu'elle offre en terme de création d'emplois et de sécurité alimentaire notamment pour les populations pauvres, mais également de génération de recettes en devises, la pêche artisanale revêt une grande priorité, un plan décennal de développement lui sera consacré ".
    Description: Published
    Description: pêche artisanale; littoral; carpe; ethmalose; donnée; mulet; pélagique; pourtague; stock halieutique; pêche; communauté de pêcheurs; effort de pêche; PNBA; technique de pêche; senne tournante; sardinelle; gonade; filet de pêche; courbine; migration d'espèces; campagne de pêche; écosystème; dégradation d'habitats de poissons; enjeux socioéconomiques; commercialisation; conservation
    Keywords: Fisheries ; Fishermen ; Stocks ; Fish fillets ; Ecosystems ; Fishing effort ; Pelagic fisheries ; Artisanal fishing ; Fisheries ; Fishermen ; Stocks ; Capture fishery economics ; Fish eggs ; Fish fillets ; Fishing effort ; Fishery technology ; Mullet fisheries ; Pelagic fisheries ; Ecosystems
    Repository Name: AquaDocs
    Type: Report
    Format: 6
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  • 34
    Publication Date: 2022-05-25
    Description: Author Posting. © The Author(s), 2012. This is the author's version of the work. It is posted here by permission of Taylor & Francis for personal use, not for redistribution. The definitive version was published in Aquaculture Economics & Management 16 (2012): 167-181, doi:10.1080/13657305.2012.678551.
    Description: This study presents a framework for analyzing the interactions between aquaculture and capture fisheries in the context of ecosystem-based management. We extend a model of the economic and ecological systems in coastal New England by incorporating an aquaculture sector in a computable general equilibrium (CGE) model and by examining the forage fish and aquaculture link in a marine food web. We show that aquaculture and commercial fisheries interact in a complex way throughout the economic and ecological systems.
    Description: This work was supported by the NOAA Saltonstall-Kennedy Grant Program (Award No. NA09NMF4270097), the MIT Sea Grant College Program (NOAA Award No. NA10OAR4170086, Subaward No. 5710002974), and the Johnson Endowment of the WHOI Marine Policy Center.
    Description: 2013-06-08
    Keywords: Aquaculture ; Fisheries ; Ecosystem-based management ; CGE model ; Food web model ; Forage fish
    Repository Name: Woods Hole Open Access Server
    Type: Preprint
    Format: application/pdf
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  • 35
    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
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  • 36
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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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  • 37
    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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  • 38
    Publication Date: 2021-01-30
    Description: Ministère des Affaires Etrangères (Sénégal); Ambassade du Sénégal à Rôme (Italy)
    Description: "Action 21"; FAO; application de l'accord; responsabilité de l'état du pavillon; échange d'informations; tiers à l'accord; règlement des différents; adhésion; entrée en vigueur; réserves; amendements; retraits; fonction du dépositaire.
    Keywords: Fisheries ; International agreements ; International cooperation ; Fisheries ; International agreements ; Maritime legislation ; International cooperation
    Repository Name: AquaDocs
    Type: Other
    Format: 14
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  • 39
    Publication Date: 2017-04-04
    Description: The complex magnetic and gravity anomaly fields of the Southern Tyrrhenian Sea provide a record of the complicated properties and evolution of the underlying crust. Geologic interpretation of these anomalies is hindered by the effects of anomaly superposition and source ambiguity inherent to potential field analysis. A common approach to minimizing interpretational ambiguities is to consider analyses of anomaly correlations. Spectral correlation filters are used to separate positively and negatively correlated anomaly features based on the correlation coefficient given by the cosine of the phase difference between common wavenumber components. This procedure is applied to reduced-to-pole magnetic and first vertical derivative gravity anomalies for mapping correlative crustal magnetization and density contrasts. Adding and subtracting the standardized outputs of the filters yield summed (SLFI) and differenced (DLFI) local favorability indices that, respectively highlight positive and negative feature correlations in the anomaly data sets. Correlative maxima mainly reflect volcanic structures, and secondarily intrusive bodies and pre- Tortonian carbonates of the Maghrebian chain and the basement rocks of the Sardinia eastern margin. Correlative minima mostly mark sediment-filled peri-Tyrrhenian structural basins related to the Pliocene extensional tectonics, and intra-slope marine depressions related to post-Pliocene and still-active compressional tectonics off Northern Sicily. Prominent inverse anomaly correlations mainly reflect crustal features around the southern margin of the Tyrrhenian Sea that include higher density, lower magnetization pelagic-to-terrigenous and flysch-type nappes of the Sicilian-Maghrebian chain, as well as lower density, higher magnetization sediments filling depressions of the chain, and syn-rift sediments of Southeastern Sardinia.
    Description: Published
    Description: 27-41
    Description: 3.2. Tettonica attiva
    Description: 3.4. Geomagnetismo
    Description: 5.7. Consulenze in favore di istituzioni nazionali e attività nell'ambito di trattati internazionali
    Description: JCR Journal
    Description: restricted
    Keywords: Magnetism ; Gravity ; Modelling ; Back-arc basin ; Volcanism ; Tectonics ; Tyrrhenian Sea ; 04. Solid Earth::04.02. Exploration geophysics::04.02.99. General or miscellaneous ; 04. Solid Earth::04.05. Geomagnetism::04.05.04. Magnetic anomalies ; 04. Solid Earth::04.07. Tectonophysics::04.07.08. Volcanic arcs ; 04. Solid Earth::04.08. Volcanology::04.08.07. Instruments and techniques
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 40
    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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  • 41
    Publication Date: 2021-09-18
    Description: Published
    Description: especies nativas
    Description: pesca
    Keywords: Fisheries ; Indigenous species ; Indigenous fishing
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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  • 42
    Publication Date: 2021-09-18
    Description: Published
    Keywords: Fisheries
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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  • 43
    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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  • 44
    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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  • 45
    Publication Date: 2022-05-26
    Description: Author Posting. © John Wiley & Sons, 2010. This is the author's version of the work. It is posted here by permission of John Wiley & Sons for personal use, not for redistribution. The definitive version was published in Aquatic Conservation: Marine and Freshwater Ecosystems 21 (2011): 17-27, doi:10.1002/aqc.1158
    Description: 1. Interactions between cetaceans and fishing activity in the Archipelago of the Azores were examined using information contained in grey literature and previously unpublished data collected by observer programmes and research projects from 1998 to 2006. Together with a brief description of the economics, gear, fishing effort, and past and ongoing monitoring projects, levels of cetacean bycatch and interference were reported for each major fishery. 2. Cetaceans were present in 7% (n=973) and interfered in 3% (n=452) of the fishing events monitored by observers aboard tuna-fishing vessels. Interference resulted in a significantly higher proportion of events with zero catches but it was also associated with higher tuna catches. 3. There was a decreasing trend in the proportion of tuna-fishing events with cetacean presence or interference throughout this study, as well as a reduction in the estimates of dolphins captured annually by the whole fleet. 4. Observers reported cetacean depredation in 16% of the sets for demersal species and in 2% of the sets for swordfish. Cetacean presence and depredation were associated with higher overall catches and higher catches per unit effort in demersal fisheries. Bottlenose dolphins (Tursiops truncatus) were responsible for most depredation events in demersal fisheries, whereas in the swordfish fishery, depredation was associated with the presence of killer whales (Orcinus orca). There were no reports of cetacean bycatch in these fisheries. There were also no reports of cetaceans interacting in the experimental deep-sea fisheries that were examined. 5. Available data suggests that levels of interaction between cetaceans and Azorean fisheries are generally low and that the economic impact of cetacean interference is probably small. However, for several traditional fisheries there are no accurate data to determine levels of cetacean interaction. We recommend that existing observer programmes be expanded to increase observer coverage of the demersal and swordfish fisheries and allow monitoring of other existing and emerging fisheries.
    Description: M.A.S. was supported by an FCT postdoctoral (SFRH/BPD/29841/2006) grant, and R.P. was supported by an FCT doctoral grant (SFRH/BD/32520/2006).
    Keywords: Cetacean–fisheries interactions ; Depredation ; Bycatch ; Fisheries ; Atlantic Ocean ; Azores
    Repository Name: Woods Hole Open Access Server
    Type: Preprint
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  • 46
    Publication Date: 2022-05-26
    Description: Author Posting. © Inter-Research, 2006. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Marine Ecology Progress Series 310 (2006): 263-270, doi:10.3354/meps310263.
    Description: The longfin squid Loligo pealeii is distributed widely in the NW Atlantic and is the target of a major fishery. A previous electrophoretic study of L. pealeii was unable to prove genetic differentiation, and the fishery has been managed as a single unit stock. We tested for population structure using 5 microsatellite loci. In early summer (June), when the squids had migrated inshore to spawn, we distinguished 4 genetically distinct stocks between Delaware and Cape Cod (ca. 490 km); a 5th genetic stock occurred in Nova Scotia and a 6th in the northern Gulf of Mexico. One of the summer inshore stocks did not show genetic differentiation from 2 of the winter offshore populations. We suggest that squids from summer locations overwinter in offshore canyons and that winter offshore fishing may affect multiple stocks of the inshore fishery. In spring, squids may segregate by genetic stock as they undertake their inshore migration, indicating an underlying mechanism of subpopulation recognition.
    Description: We acknowledge funding from WHOI Sea Grant NA16RG2273, the Massachusetts Environmental Trust (#98-04), and the Sholley Foundation.
    Keywords: Fisheries ; Spawning migration ; Microsatellites ; Population structure ; Population recognition ; Null alleles
    Repository Name: Woods Hole Open Access Server
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  • 47
    Publication Date: 2022-05-26
    Description: Author Posting. © Foundation for Environmental Conservation, 2009. This article is posted here by permission of Cambridge University Press for personal use, not for redistribution. The definitive version was published in Environmental Conservation 36 (2009): 268-276, doi:10.1017/S0376892910000032.
    Description: No-take marine reserves are widely recognized as an effective conservation tool for protecting marine resources. Despite considerable empirical evidence that abundance and biomass of fished species increase within marine reserve boundaries, the potential for reserves to provide fisheries and conservation benefits to adjacent waters remains heavily debated. This paper uses statistical and population models to evaluate published empirical data on adult spillover from marine reserves and shows that spillover is a common phenomenon for species that respond positively to reserve protection, but at relatively small scales, detectable on average up to 800 m from reserve boundaries. At these small scales, local fisheries around reserves were likely unsustainable in 12 of 14 cases without the reserve, and spillover partially or fully offsets losses in catch due to reserve closure in the other two cases. For reserves to play a role in sustaining and replenishing larger-scale fished stocks, networks of reserves may be necessary, but as few exist this is difficult to evaluate. The results suggest reserves can simultaneously meet conservation objectives and benefit local fisheries adjacent to their boundaries.
    Description: Support was provided by a grant from the David and Lucille Packard Foundation to NCEAS for ecosystem-based management ofmarine systems, the Partnership for Interdisciplinary Studies of Coastal Oceans (PISCO) funded by the David and Lucile Packard Foundation and the Gordon and Betty Moore Foundation (contribution number 348), the Sustainable Fisheries Group supported by the Paul G. Allen Family Foundation and the Bahamas Biocomplexity Project (US NSF Biocomplexity grantOCE-0119976) andUS EPA Science to Achieve Results (R832223).
    Keywords: Adult fish movement ; Fisheries ; Global ; Marine protected areas ; No-take reserves ; Spillover effect ; Synthesis
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 48
    Publication Date: 2013-09-07
    Description: Author(s): A. Tan, J. Li, C. A. Jenkins, E. Arenholz, A. Scholl, C. Hwang, and Z. Q. Qiu Py/FeMn/Cu(001) and Py/FeMn/Ni/Cu(001) films were grown and studied as a function of both the FeMn and the Ni thicknesses using rotating magneto-optic Kerr effect and x-ray magnetic circular dichroism. For Py/FeMn/Cu(001), we find that the FeMn antiferromagnetic order switches the sign of the Py fou... [Phys. Rev. B 88, 104404] Published Fri Sep 06, 2013
    Keywords: Magnetism
    Print ISSN: 1098-0121
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  • 49
    Publication Date: 2013-09-14
    Description: Author(s): A. Hillion, A. Tamion, F. Tournus, O. Gaier, E. Bonet, C. Albin, and V. Dupuis We propose a theoretical framework enabling the simulation of isothermal remanence magnetization (IRM) curves, based on the Stoner-Wohlfarth model combined with the Néel macrospin relaxation time description. We show how low temperature IRM curves, which have many advantages compared to hysteresis l... [Phys. Rev. B 88, 094419] Published Fri Sep 13, 2013
    Keywords: Magnetism
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  • 50
    Publication Date: 2013-09-14
    Description: Author(s): A. A. Bush, N. Büttgen, A. A. Gippius, V. N. Glazkov, W. Kraetschmer, L. A. Prozorova, L. E. Svistov, A. M. Vasiliev, and A. Zheludev We present the results of magnetization, electron spin resonance (ESR), and nuclear magnetic resonance (NMR) measurements on single-crystal samples of the frustrated S =1/2 chain cuprate LiCu 2 O 2 doped with nonmagnetic Zn 2+ . As shown by the x-ray techniques, the crystals of Li(Cu 1− x Zn x ) 2 O 2 with x 〈0... [Phys. Rev. B 88, 104411] Published Fri Sep 13, 2013
    Keywords: Magnetism
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  • 51
    Publication Date: 2013-09-14
    Description: Author(s): D. T. Son and B. Z. Spivak We consider the classical magnetoresistance of a Weyl metal in which the electron Fermi surface possesses nonzero fluxes of the Berry curvature. Such a system may exhibit large negative magnetoresistance with unusual anisotropy as a function of the angle between the electric and magnetic fields. In ... [Phys. Rev. B 88, 104412] Published Fri Sep 13, 2013
    Keywords: Magnetism
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  • 52
    Publication Date: 2013-09-19
    Description: Author(s): Pascal Melchior, Markus Rollinger, Philip Thielen, Sabine Alebrand, Ute Bierbrauer, Christian Schneider, Matthias Gottwald, Michel Hehn, Stéphane Mangin, Mirko Cinchetti, and Martin Aeschlimann We report magnetic domain imaging of a terbium cobalt (TbCo) alloy thin film with a high perpendicular magnetic anisotropy in one- and two-photon photoemission electron microscopy (PEEM). Both photoemission processes deliver a clear magnetic circular dichroism (MCD) whose strength is strongly energy... [Phys. Rev. B 88, 104415] Published Wed Sep 18, 2013
    Keywords: Magnetism
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  • 53
    Publication Date: 2013-09-19
    Description: Author(s): V. Scagnoli, S. W. Huang, M. Garganourakis, R. A. de Souza, U. Staub, V. Simonet, P. Lejay, and R. Ballou We have used soft x-ray magnetic diffraction at the Fe 3+ L 2,3 edges to examine to what extent the Dzyaloshinsky-Moriya interaction in Ba 3 NbFe 3 Si 2 O 14 influences its low-temperature magnetic structure. A modulated component of the moments along the c axis is present, adding to the previously proposed ... [Phys. Rev. B 88, 104417] Published Wed Sep 18, 2013
    Keywords: Magnetism
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  • 54
    Publication Date: 2013-09-20
    Description: Author(s): K. I. Doig, F. Aguesse, A. K. Axelsson, N. M. Alford, S. Nawaz, V. R. Palkar, S. P. P. Jones, R. D. Johnson, R. A. Synowicki, and J. Lloyd-Hughes Coherent magnons and acoustic phonons were impulsively excited and probed in thin films of the room temperature multiferroic Bi 1− x − y Dy x La y FeO 3 using femtosecond laser pulses. The elastic moduli of rhombohedral, tetragonal, and rare-earth doped BiFeO 3 were determined from acoustic-mode frequencies in... [Phys. Rev. B 88, 094425] Published Thu Sep 19, 2013
    Keywords: Magnetism
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  • 55
    Publication Date: 2013-09-21
    Description: Author(s): Randy S. Fishman Multiferroic BiFeO 3 undergoes a transition from a distorted spiral phase to a G-type antiferromagnet above a critical field H c that depends on the field orientation m . We show that H c ( m ) has a maximum when oriented along a cubic diagonal parallel to the electric polarization P and a minimum in the e... [Phys. Rev. B 88, 104419] Published Fri Sep 20, 2013
    Keywords: Magnetism
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  • 56
    Publication Date: 2013-09-21
    Description: Author(s): Elisa Ercolessi, Stefano Evangelisti, Fabio Franchini, and Francesco Ravanini We show that the elliptic parametrization of the coupling constants of the quantum X Y Z spin chain can be analytically extended outside of their natural domain, to cover the whole phase diagram of the model, which is composed of 12 adjacent regions, related to one another by a spin rotation. This ext... [Phys. Rev. B 88, 104418] Published Fri Sep 20, 2013
    Keywords: Magnetism
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  • 57
    Publication Date: 2013-09-24
    Description: Author(s): Jie Ren and Jian-Xin Zhu We study the nonequilibrium transport for the asymmetric and negative differential magnon tunneling driven by temperature bias. We demonstrate that the many-body magnon interaction that makes the magnonic spectrum temperature-dependent is the crucial factor for the emergence of rectification and neg... [Phys. Rev. B 88, 094427] Published Mon Sep 23, 2013
    Keywords: Magnetism
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  • 58
    Publication Date: 2013-09-27
    Description: Author(s): X. Ke, T. Birol, R. Misra, J.-H. Lee, B. J. Kirby, D. G. Schlom, C. J. Fennie, and J. W. Freeland Octahedral distortion plays a key role in engineering the physical properties of heterostructures composed of perovskite oxides. We observe a strong in-plane uniaxial magnetic anisotropy in a strain-enabled multiferroic EuTiO 3 thin film epitaxially grown on a (110) o DyScO 3 substrate. First-principle... [Phys. Rev. B 88, 094434] Published Thu Sep 26, 2013
    Keywords: Magnetism
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  • 59
    Publication Date: 2013-09-27
    Description: Author(s): F. Michaud and F. Mila We study the spin S =1 antiferromagnetic Heisenberg model on the square lattice with, in addition to the nearest-neighbor interaction, a three-site interaction of the form ( S i · S j )( S j · S k )+H.c. This interaction appears naturally in a strong coupling expansion of the two-orbital, half-filled Hubbard mod... [Phys. Rev. B 88, 094435] Published Thu Sep 26, 2013
    Keywords: Magnetism
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  • 60
    Publication Date: 2013-09-27
    Description: Author(s): K. R. Shirer, J. T. Haraldsen, A. P. Dioguardi, J. Crocker, N. apRoberts-Warren, A. C. Shockley, C.-H. Lin, D. M. Nisson, J. C. Cooley, M. Janoschek, K. Huang, N. Kanchanavatee, M. B. Maple, M. J. Graf, A. V. Balatsky, and N. J. Curro We report 29 Si nuclear magnetic resonance measurements in single crystals and aligned powders of URu 2 Si 2 in the hidden order and paramagnetic phases. The spin-lattice relaxation data reveal evidence of pseudospin fluctuations of U moments in the paramagnetic phase. We find evidence for partial suppr... [Phys. Rev. B 88, 094436] Published Thu Sep 26, 2013
    Keywords: Magnetism
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  • 61
    Publication Date: 2013-09-27
    Description: Author(s): A. Rodríguez-Fernández, J. A. Blanco, S. W. Lovesey, V. Scagnoli, U. Staub, H. C. Walker, D. K. Shukla, and J. Strempfer Chiral properties of the two phases—collinear motif (below Morin transition temperature, T M ≈250 K) and canted motif (above T M )—of magnetically ordered hematite ( α -Fe 2 O 3 ) have been identified in single-crystal resonant x-ray Bragg diffraction using circular polarized incident x rays tuned near the ir... [Phys. Rev. B 88, 094437] Published Thu Sep 26, 2013
    Keywords: Magnetism
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  • 62
    Publication Date: 2013-09-27
    Description: Author(s): J. Z. Sun, S. L. Brown, W. Chen, E. A. Delenia, M. C. Gaidis, J. Harms, G. Hu, Xin Jiang, R. Kilaru, W. Kula, G. Lauer, L. Q. Liu, S. Murthy, J. Nowak, E. J. O’Sullivan, S. S. P. Parkin, R. P. Robertazzi, P. M. Rice, G. Sandhu, T. Topuria, and D. C. Worledge It is convenient to define the spin-torque switching efficiency in nanostructured magnetic tunnel junctions as the ratio between the free-layers thermal activation barrier height E b and the threshold switching current I c 0 . Recent device exploration has led to occasional observations of spin-torque i... [Phys. Rev. B 88, 104426] Published Thu Sep 26, 2013
    Keywords: Magnetism
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  • 63
    Publication Date: 2013-09-28
    Description: Author(s): Kiran Singh, Tathamay Basu, S. Chowki, N. Mahapotra, Kartik K. Iyer, P. L. Paulose, and E. V. Sampathkumaran We report the results of various measurements, namely magnetization, complex dielectric permittivity, and electric polarization ( P ), on Dy 2 BaNiO 5 as a function of temperature ( T ) and magnetic field ( H ), apart from heat capacity ( C ), with the primary motivation of exploring the existence of magnetoel... [Phys. Rev. B 88, 094438] Published Fri Sep 27, 2013
    Keywords: Magnetism
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  • 64
    Publication Date: 2013-10-01
    Description: Author(s): Hiroto Ohta, Daisuke Noguchi, Koichiro Nabetani, and Hiroko Aruga Katori We studied magnetism of Sr 2 ScO 3 CoAs, a member of the group of layered compound with CoAs conducting layers, by using successfully synthesized polycrystalline sample. As a result of magnetic and electric resistivity measurements, Sr 2 ScO 3 CoAs was revealed to be an itinerant electronic ferromagnet with... [Phys. Rev. B 88, 094441] Published Mon Sep 30, 2013
    Keywords: Magnetism
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  • 65
    Publication Date: 2013-10-01
    Description: Author(s): L. Caron, M. Hudl, V. Höglin, N. H. Dung, C. P. Gomez, M. Sahlberg, E. Brück, Y. Andersson, and P. Nordblad Magnetic and magnetocaloric properties of high-purity, giant magnetocaloric polycrystalline and single-crystalline Fe 2 P are investigated. Fe 2 P displays a moderate magnetic entropy change, which spans over 70 K and the presence of strong magnetization anisotropy proves this system is not fully itiner... [Phys. Rev. B 88, 094440] Published Mon Sep 30, 2013
    Keywords: Magnetism
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  • 66
    Publication Date: 2013-10-02
    Description: Author(s): Z. Liu, T. Waki, Y. Tabata, K. Yuge, H. Nakamura, and I. Watanabe Aiming to find magnetic states in the M n +1 A X n phases, we measured the magnetic susceptibility, the resistivity, and nuclear magnetic resonance of Cr 2 Ga X ( X =N and C). Zero-field and longitudinal-field muon spin relaxation experiments were also applied to Cr 2 GaN. A magnetic phase transition, most prob... [Phys. Rev. B 88, 134401] Published Tue Oct 01, 2013
    Keywords: Magnetism
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  • 67
    Publication Date: 2013-10-03
    Description: Author(s): Anne D. Lamirand, Márcio M. Soares, Aline Y. Ramos, Hélio C. N. Tolentino, Maurizio De Santis, Julio C. Cezar, Abner de Siervo, and Matthieu Jamet We report on the exchange coupling and magnetic properties of a strained ultrathin CoO/PtFe double layer with perpendicular magnetic anisotropy. The cobalt oxide growth by reactive molecular beam epitaxy on a Pt-terminated PtFe/Pt(001) surface gives rise to a hexagonal surface and a monoclinic disto... [Phys. Rev. B 88, 140401] Published Wed Oct 02, 2013
    Keywords: Magnetism
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  • 68
    Publication Date: 2013-09-07
    Description: Author(s): I. Fina, V. Skumryev, D. O’Flynn, G. Balakrishnan, and J. Fontcuberta In some magnetic ferroelectrics the polarization P direction can be selected by a magnetic field H . Here we show that in a (Y 1− x Sm x )MnO 3 single crystal, both the direction and the magnitude of P can be controlled solely by H . We argue that this remarkable dual control arises from both the phase coex... [Phys. Rev. B 88, 100403] Published Fri Sep 06, 2013
    Keywords: Magnetism
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  • 69
    Publication Date: 2013-09-11
    Description: Author(s): Sanhita Ghosh, Saiti Datta, Haidong Zhou, Michael Hoch, Christopher R. Wiebe, Pedro Schlottmann, and Stephen Hill Low-energy excitations in the rare earth kagome spin system Pr 3 Ga 5 SiO 14 (PGS) have been investigated using high-field electron spin resonance (ESR) techniques. Previous work has shown that PGS does not exhibit long-range magnetic order at temperatures down to 30 mK. The present low-temperature (1.3–... [Phys. Rev. B 88, 094414] Published Tue Sep 10, 2013
    Keywords: Magnetism
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  • 70
    Publication Date: 2013-09-13
    Description: Author(s): Euna Jo, Byeongki Kang, Changsoo Kim, Sangil Kwon, and Soonchil Lee 63,65 Cu and 53 Cr nuclear magnetic resonance spectra for CuCr 2 O 4 were measured at various magnetic fields and temperatures. The microscopic evidence of orbital ordering in CuCr 2 O 4 was obtained from a dipolar hyperfine field, NQR, and magnetic anisotropy analysis of the linewidth broadening of the Cu ... [Phys. Rev. B 88, 094417] Published Thu Sep 12, 2013
    Keywords: Magnetism
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  • 71
    Publication Date: 2013-09-13
    Description: Author(s): T. R. Dasa, P. Ruiz-Díaz, O. O. Brovko, and V. S. Stepanyuk Thickness dependence of magnetic anisotropy energy (MAE) and spin polarization in Fe and Co multilayers on a Pt(001) substrate are investigated with ab initio techniques. As the thickness of the thin films is increased, an oscillatory behavior of the MAE of the systems is observed. For Fe multilayer... [Phys. Rev. B 88, 104409] Published Thu Sep 12, 2013
    Keywords: Magnetism
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  • 72
    Publication Date: 2013-09-13
    Description: Author(s): Aleksander Zujev and Pinaki Sengupta We investigate the magnetic properties of a heterostructure comprised of alternating metallic and Mott insulating layers of fermions with varying interlayer hybridization. Results from large-scale quantum Monte Carlo simulations at half-filling show clear evidence of induced magnetism in the metalli... [Phys. Rev. B 88, 094415] Published Thu Sep 12, 2013
    Keywords: Magnetism
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  • 73
    Publication Date: 2013-09-13
    Description: Author(s): Hadi Ebrahimnejad and Mona Berciu A hole in a two-dimensional Ising antiferromagnet was believed to be infinitely heavy due to the string of wrongly oriented spins it creates as it moves, which should trap it near its original location. Trugman showed that, in fact, the hole acquires a finite effective mass due to contributions from... [Phys. Rev. B 88, 104410] Published Thu Sep 12, 2013
    Keywords: Magnetism
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  • 74
    Publication Date: 2013-09-14
    Description: Author(s): M. Sera, H. Nohara, M. Nakamura, H. Tanida, T. Nishioka, and M. Matsumura We investigated the magnetic properties of the antiferromagnetic (AFM) compound Gd T 2 Al 10 ( T =Ru and Fe). Although GdRu 2 Al 10 could be understood well as a simple AFM compound, the exchange interaction in GdFe 2 Al 10 is found to be greatly varied with temperature. The magnitude of the AFM exchange intera... [Phys. Rev. B 88, 100404] Published Fri Sep 13, 2013
    Keywords: Magnetism
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  • 75
    Publication Date: 2013-09-17
    Description: Author(s): A. Rebello, Z. C. M. Winter, S. Viall, and J. J. Neumeier High-resolution thermal-expansion measurements of single-crystalline CuO (tenorite) are reported for the temperature range 5〈 T 〈350 K. The data reveal three transitions ( T N 1 = 213 K, T N 2 = 229.2 K, and T N 3 = 229.8 K), which corroborate the recently proposed magnetic phase diagram [ Villarreal, ... [Phys. Rev. B 88, 094420] Published Mon Sep 16, 2013
    Keywords: Magnetism
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  • 76
    Publication Date: 2013-09-17
    Description: Author(s): Christian Franz, Michael Czerner, and Christian Heiliger The dependence of tunneling magnetoresistance and spin-transfer torque in FeCo/MgO/FeCo tunnel junctions on the Co concentration and the bias voltage are investigated ab initio . We find that the tunneling magnetoresistance decreases with the Co concentration, in contradiction to previous calculation... [Phys. Rev. B 88, 094421] Published Mon Sep 16, 2013
    Keywords: Magnetism
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  • 77
    Publication Date: 2013-09-17
    Description: Author(s): Pavel Baláž, Maciej Zwierzycki, and Józef Barnaś We present a theoretical description of spin-transfer torque in a spin valve with perpendicularly magnetized polarizer. The polarizer consisting of several ultrathin layers is considered as a single interfacial magnetic scatterer between two nonmagnetic layers, and is included in the theory based on... [Phys. Rev. B 88, 094422] Published Mon Sep 16, 2013
    Keywords: Magnetism
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  • 78
    Publication Date: 2013-09-17
    Description: Author(s): M. B. Stone, G. Ehlers, and G. E. Granroth We examine the magnetic excitation spectrum in the S =2 Heisenberg antiferromagnet CrCl 2 . Inelastic neutron scattering measurements on powder samples are able to determine the significant exchange interactions in this system. A large anisotropy gap is observed in the spectrum below the Néel temperatu... [Phys. Rev. B 88, 104413] Published Mon Sep 16, 2013
    Keywords: Magnetism
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  • 79
    Publication Date: 2013-09-18
    Description: Author(s): P. Manuel, L. C. Chapon, G. Trimarchi, I. S. Todorov, D. Y. Chung, B. Ouladdiaf, M. J. Gutmann, A. J. Freeman, and M. G. Kanatzidis We have studied the magnetic structure of a Cr-doped iron-arsenide compound CaFe 4 As 3 by means of single crystal neutron diffraction. The neutron data reveal that below 90 K, an antiferromagnetic structure with propagation vector k =0 is adopted. Refinement of the magnetic structure using one of the m... [Phys. Rev. B 88, 104414] Published Tue Sep 17, 2013
    Keywords: Magnetism
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  • 80
    Publication Date: 2013-09-19
    Description: Author(s): R. Huber, T. Schwarze, and D. Grundler Spin wave transmission experiments are performed on a one-dimensional magnonic crystal (MC) where an injection pad for domain walls reverses the magnetization M of selected nanostripes independently from the otherwise saturated MC. The MC consists of a periodic array of 255-nm-wide permalloy nanostr... [Phys. Rev. B 88, 100405] Published Wed Sep 18, 2013
    Keywords: Magnetism
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  • 81
    Publication Date: 2013-09-19
    Description: Author(s): H. L. Wang, C. H. Du, Y. Pu, R. Adur, P. C. Hammel, and F. Y. Yang Epitaxial Y 3 Fe 5 O 12 thin films deposited by off-axis sputtering exhibit excellent crystalline quality enabling observation of large spin pumping signals in Pt/Y 3 Fe 5 O 12 and W/Y 3 Fe 5 O 12 bilayers driven by cavity ferromagnetic resonance. The inverse spin Hall voltages reach 2.10 and −5.26 mV in 5-mm-long... [Phys. Rev. B 88, 100406] Published Wed Sep 18, 2013
    Keywords: Magnetism
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  • 82
    Publication Date: 2013-09-19
    Description: Author(s): Angel M. Arévalo-López and J. Paul Attfield Magnetic order consistent with multiferroism has been observed in the acentric LiNbO 3 -type, high pressure form II of MnTiO 3 using neutron diffraction and magnetization measurements. Spin order below the 28 K magnetic transition has propagation vector (0 0 0), and spins lie in the a b plane. Represent... [Phys. Rev. B 88, 104416] Published Wed Sep 18, 2013
    Keywords: Magnetism
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  • 83
    Publication Date: 2013-09-20
    Description: Author(s): V. L. Krutyanskiy, I. A. Kolmychek, B. A. Gribkov, E. A. Karashtin, E. V. Skorohodov, and T. V. Murzina Nonlinear optical properties of a regular array of triangular-shaped vortex magnetic nanoparticles is studied using the optical second harmonic generation (SHG) technique. We demonstrate that the SHG azimuthal anisotropy is consistent with the 3 m symmetry of individual Co nanodots placed in a square... [Phys. Rev. B 88, 094424] Published Thu Sep 19, 2013
    Keywords: Magnetism
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  • 84
    Publication Date: 2013-09-24
    Description: Author(s): Nicola A. Spaldin, Michael Fechner, Eric Bousquet, Alexander Balatsky, and Lars Nordström We develop the formalism of the macroscopic monopolization—that is, the magnetoelectric monopole moment per unit volume—in periodic solids, and discuss its relationship to the magnetoelectric effect. For the series of lithium transition metal phosphate compounds, we use first-principles density func... [Phys. Rev. B 88, 094429] Published Mon Sep 23, 2013
    Keywords: Magnetism
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  • 85
    Publication Date: 2013-09-26
    Description: Author(s): Martin Schlipf, Markus Betzinger, Marjana Ležaić, Christoph Friedrich, and Stefan Blügel We analyze the structural, electronic, and magnetic properties of the europium chalcogenide series Eu X ( X =O, S, Se, and Te) using density-functional theory (DFT). To describe the localized 4 f states of Eu, we utilize the parameter-free PBE0 and HSE hybrid functionals and found a systematic qualitati... [Phys. Rev. B 88, 094433] Published Wed Sep 25, 2013
    Keywords: Magnetism
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  • 86
    Publication Date: 2013-09-26
    Description: Author(s): Maria Stamenova and Stefano Sanvito We report on ab initio time-dependent spin-dynamics simulations for a two-center magnetic molecular complex within the framework of the time-dependent noncollinear spin-density functional theory. In particular, we discuss how the dynamical behavior of the ab initio spin-density in the time domain ca... [Phys. Rev. B 88, 104423] Published Wed Sep 25, 2013
    Keywords: Magnetism
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  • 87
    Publication Date: 2013-09-26
    Description: Author(s): Z. Sabsabi, F. Vernay, O. Iglesias, and H. Kachkachi We study the interplay between the effects of surface anisotropy and dipolar interactions in monodisperse assemblies of nanomagnets with oriented anisotropy. We derive asymptotic formulas for the assembly magnetization, taking into account temperature, applied field, core and surface anisotropy, and... [Phys. Rev. B 88, 104424] Published Wed Sep 25, 2013
    Keywords: Magnetism
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  • 88
    Publication Date: 2013-09-26
    Description: Author(s): Voicu Popescu and Peter Kratzer The longitudinal thermopower of a Cu/Co/Cu trilayer system exhibits an oscillatory dependence on the thickness of the Co layer, a behavior related to the formation of quantum well states in the minority spin channel. In addition, it is found to be very sensitive to a switching between an in-plane an... [Phys. Rev. B 88, 104425] Published Wed Sep 25, 2013
    Keywords: Magnetism
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  • 89
    Publication Date: 2013-10-01
    Description: Author(s): Yuta Kumano, Koji Hukushima, Yusuke Tomita, and Masaki Oshikawa We study response to a twist in the two-dimensional p -state clock model, which has the discrete Z p symmetry. The response is measured in terms of helicity modulus, which is usually defined with respect to an infinitesimal twist. However, we demonstrate that such a definition is inappropriate for the... [Phys. Rev. B 88, 104427] Published Mon Sep 30, 2013
    Keywords: Magnetism
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  • 90
    Publication Date: 2013-10-01
    Description: Author(s): Alan Kalitsov, Whasington Silvestre, Mairbek Chshiev, and Julian P. Velev We derive expressions for both parallel and perpendicular components of spin transfer torque (STT) in magnetic tunnel junctions (MTJs), which have several important advantages over the currently available expressions: First they are derived in a more realistic approximation, resulting in excellent a... [Phys. Rev. B 88, 104430] Published Mon Sep 30, 2013
    Keywords: Magnetism
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  • 91
    Publication Date: 2013-10-01
    Description: Author(s): D. E. Gonzalez-Chavez, R. Dutra, W. O. Rosa, T. L. Marcondes, A. Mello, and R. L. Sommer The magnetization dynamics of coupled and uncoupled spin valves with the structure NiFe (20 nm)/Cu( t Cu )/NiFe (20 nm)/IrMn (10 nm) is probed by broadband ferromagnetic resonance absorption measurements. The coupling intensity between the free and the pinned layers is tailored by varying the Cu thickn... [Phys. Rev. B 88, 104431] Published Mon Sep 30, 2013
    Keywords: Magnetism
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  • 92
    Publication Date: 2013-10-01
    Description: Author(s): Emanuele Levi, Olalla A. Castro-Alvaredo, and Benjamin Doyon We carry out a numerical study of the bipartite entanglement entropy in the gapped regime of two paradigmatic quantum spin chain models: the Ising chain in an external magnetic field and the antiferromagnetic XXZ model. The universal scaling limit of these models is described by the massive Ising fi... [Phys. Rev. B 88, 094439] Published Mon Sep 30, 2013
    Keywords: Magnetism
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  • 93
    Publication Date: 2013-10-01
    Description: Author(s): Kirill Kovnir, Corey M. Thompson, V. Ovidiu Garlea, Daniel Haskel, Anatolii A. Polyanskii, Haidong Zhou, and Michael Shatruk Magnetic behavior of La 0.75 Pr 0.25 Co 2 P 2 was investigated by a combination of magnetic measurements, magneto-optical imaging, neutron diffraction, and x-ray absorption spectroscopy, including x-ray magnetic circular dichroism. The material crystallizes in the ThCr 2 Si 2 structure type and exhibits three... [Phys. Rev. B 88, 104429] Published Mon Sep 30, 2013
    Keywords: Magnetism
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  • 94
    Publication Date: 2013-10-01
    Description: Author(s): Guo-Qiang Liu The ferromagnetic phase of Ca 2 RuO 4 has been puzzling because the observed magnetic moment m ≈ 0.4 μ B /Ru is surprisingly small, compared with the predicted 2 μ B /Ru. This discrepancy is resolved by considering the interplay of the spin-orbit coupling and Coulomb repulsion, which results in a large enhan... [Phys. Rev. B 88, 104428] Published Mon Sep 30, 2013
    Keywords: Magnetism
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  • 95
    Publication Date: 2013-10-03
    Description: Author(s): Ersoy Şaşıoğlu, Iosif Galanakis, Christoph Friedrich, and Stefan Blügel Correlation effects play an important role in the electronic structure of half-metallic (HM) magnets. In particular, they give rise to nonquasiparticle states above (or below) the Fermi energy at finite temperatures that reduce the spin polarization and, as a consequence, the efficiency of spintroni... [Phys. Rev. B 88, 134402] Published Wed Oct 02, 2013
    Keywords: Magnetism
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  • 96
    Publication Date: 2013-10-04
    Description: Author(s): Anson W. C. Wong, Zhihao Hao, and Michel J. P. Gingras Motivated by recent experimental and theoretical progress on the Er 2 Ti 2 O 7 pyrochlore X Y antiferromagnet, we study the general problem of quantum order-by-disorder in pyrochlore X Y systems. We consider the nearest-neighbor pseudo-spin-1/2 Hamiltonian for such a system characterized by anisotropic spi... [Phys. Rev. B 88, 144402] Published Thu Oct 03, 2013
    Keywords: Magnetism
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  • 97
    Publication Date: 2013-10-04
    Description: Author(s): A. M. Tsvelik and Wei-Guo Yin We discuss a possible realization of overscreened N -channel Kondo model in quasi-one-dimensional magnets. We suggest that it is feasible to have arrangements for N from 2 to 6 and discuss the related quantum chemistry problems. [Phys. Rev. B 88, 144401] Published Thu Oct 03, 2013
    Keywords: Magnetism
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  • 98
    Publication Date: 2013-10-04
    Description: Author(s): A. M. Vasiliev, L. A. Prozorova, L. E. Svistov, V. Tsurkan, V. Dziom, A. Shuvaev, Anna Pimenov, and A. Pimenov Using the electron-spin-resonance technique we investigate the magnetic structure of CuCrO 2 , a quasi-two-dimensional antiferromagnet with a weakly distorted triangular lattice. Resonance frequencies and the excitation conditions in CuCrO 2 at low temperatures are well described in the frame of cycloi... [Phys. Rev. B 88, 144403] Published Thu Oct 03, 2013
    Keywords: Magnetism
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  • 99
    Publication Date: 2013-10-05
    Description: Author(s): Marjana Ležaić, Phivos Mavropoulos, Gustav Bihlmayer, and Stefan Blügel We explore the derivation of interatomic exchange interactions in ferromagnets within density-functional theory (DFT) and the mapping of DFT results onto a spin Hamiltonian. We delve into the problem of systems comprising atoms with strong spontaneous moments together with atoms with weak induced mo... [Phys. Rev. B 88, 134403] Published Fri Oct 04, 2013
    Keywords: Magnetism
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  • 100
    Publication Date: 2013-10-05
    Description: Author(s): W. Schnelle, A. Leithe-Jasper, H. Rosner, F. M. Schappacher, R. Pöttgen, F. Pielnhofer, and R. Weihrich Single crystalline Sn 2 Co 3 S 2 with the shandite-type structure was investigated by magnetization, magnetoresistance, Hall effect, and heat capacity measurements and by 119 Sn Mößbauer spectroscopy. Sn 2 Co 3 S 2 orders ferromagnetically at 172 K with an easy-axis magnetization of ≈1 μ B along the hexagonal c ... [Phys. Rev. B 88, 144404] Published Fri Oct 04, 2013
    Keywords: Magnetism
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