132 research outputs found

    Assessment of reliability of fish consumption as an indicator of reef fish catches in small Pacific islands : the example of Ouvea Island in New Caledonia

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    Fishing pressure on reef fish stocks, in relation to exploitable biomass, is a useful parameter for fishery resource management but difficult to assess in subsistence fisheries. A methodology for indirect fishery output assessment in island environments is proposed based on estimates of consumption and the relevant seafood trade. Ouvea atoll in the South Pacific (Loyalty Islands, New Caledonia), where subsistence fishing is the main activity, was used as the IPF experimental site. A consumer survey of the islands' households was conducted in June 2000. The sampling plan was determined on the basis of data already available on the population concerned, making it possible to give quantitative and qualitative information on catches. Total catch is estimated to be 212 ty(-1) composed mainly of Lethrinidae, Serranidae and Gerreidae. Subsistence activity is the main source of supply for two-thirds of households. These results were validated by a survey carried out on fishers at the same time that confirms the reliability of fish Consumption as an indicator of reef fish catches. This study also showed that shoreline fishing remains the main activity in Ouvea: it's practised by 71% of households and provides almost 48% of total landings. A second stage was the identification of variables liable to influence consumption patterns: fishing practice (frequency and gear type), income, and household size seemed to be the main determining factors. These variables were integrated into a multi-dimensional analysis in order to define types Of Consumers. This consumption-based approach underlies a sampling strategy that could be a extrapolated to other small South Pacific islands. It involves advantages of various kinds-accuracy, reliability, and cost-effective implementation-that make it a powerful tool for monitoring island fishery development.La pression de pĂȘche, reliĂ©e Ă  la biomasse exploitable, est un paramĂštre utile pour la gestion des stocks de poissons rĂ©cifaux, mais elle est difficile Ă  Ă©valuer pour la pĂȘche de subsistance. Une mĂ©thodologie d'Ă©valuation indirecte de la production halieutique est proposĂ©e, basĂ©e sur des estimations de consommation et d'Ă©changes de produits de la mer. L'atoll d'OuvĂ©a dans le Pacifique sud (Ăźles LoyautĂ©, Nouvelle-CalĂ©donie), oĂč la pĂȘche de subsistance est l'activitĂ© principale, a servi de site expĂ©rimental. Une enquĂȘte de consommation a Ă©tĂ© conduite chez les mĂ©nages de l'Ăźle en juin 2000. Le plan d'Ă©chantillonnage, dĂ©fini Ă  partir de donnĂ©es disponibles sur la population, a permis d'apporter des informations quantitatives et qualitatives sur les captures: la production totale, estimĂ©e Ă  212 t par an, se compose principalement de LethrinidĂ©s, SerranidĂ©s et GerrĂ©idĂ©s. La pĂȘche de subsistance reprĂ©sente la principale source d'approvisionnement pour les deux tiers des foyers. Ces rĂ©sultats ont Ă©tĂ© validĂ©s par une enquĂȘte conduite simultanĂ©ment auprĂšs des pĂȘcheurs qui a confirmĂ© la fiabilitĂ© de la consommation de poisson comme indicateur des captures de poissons rĂ©cifaux. Cette Ă©tude de la production halieutique a Ă©galement montrĂ© que la pĂȘche littorale reste l'activitĂ© principale Ă  OuvĂ©a: 71 % des mĂ©nages la pratiquent et elle reprĂ©sente prĂšs de 48 % des dĂ©barquements. Dans un second temps, l'Ă©tude a portĂ© sur les variables susceptibles d'influencer la consommation de produits de la mer: la pratique de la pĂȘche (frĂ©quence et types d'engins utilisĂ©s), les revenus et la taille des mĂ©nages semblent ĂȘtre les facteurs dĂ©terminants. Ces variables ont Ă©tĂ© introduites dans une analyse multi-dimensionnelle afin de dĂ©finir des types de consommateurs. Cette mĂ©thode basĂ©e sur la consommation de poisson dĂ©crit une stratĂ©gie d'Ă©chantillonnage qui pourrait ĂȘtre extrapolĂ©e Ă  d'autres petites Ăźles du Pacifique sud. Elle prĂ©sente divers avantages (prĂ©cision, fiabilitĂ©, facilitĂ© et rapiditĂ© de mise en Ɠuvre) qui en font un outil performant pour suivre le dĂ©veloppement des pĂȘcheries insulaires

    Village Baseline Study: Site Analysis Report for Yatenga – Tougou, Burkina Faso

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    The village baseline study of Kononga village in the CCAFS site Yatenga-Tougou in Burkina Faso took place from 19th to 21st July 2011. Focus group discussions were conducted separately for men and women. Male and female participants believe that the natural resources in the village are deteriorating due to population increase and labour shortages related to the exodus of young people to gold mining sites. The village’s vision of the future includes more productive and fertile farmland, a denser forest, deeper and wider water reservoirs, and more boreholes. The men identified 21 organisations in the village, including 9 operating at the community level, while women identified 17 organisations, 10 of which operate at the community level. Men are considered the most important personal source of information in the village. The regional directorate for agriculture, hydrology and fishery resources (DRAHRA) is the single most relevant institutional source of climate and weather information for both male and female participants. Men and women gather information from outside the village via radio broadcasting and particularly Radio “Voix du paysan” (Voice of the Farmer). The market is the most important channel of information access for women. Women have a substantial role in agriculture and livestock production, as well as natural resource management but they have limited access to land or to improved technology or equipment, and few training opportunities

    Maternal and perinatal health research priorities beyond 2015 : an international survey and prioritization exercise

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    Background: Maternal mortality has declined by nearly half since 1990, but over a quarter million women still die every year of causes related to pregnancy and childbirth. Maternal-health related targets are falling short of the 2015 Millennium Development Goals and a post-2015 Development Agenda is emerging. In connection with this, setting global research priorities for the next decade is now required. Methods. We adapted the methods of the Child Health and Nutrition Research Initiative (CHNRI) to identify and set global research priorities for maternal and perinatal health for the period 2015 to 2025. Priority research questions were received from various international stakeholders constituting a large reference group, and consolidated into a final list of research questions by a technical working group. Questions on this list were then scored by the reference working group according to five independent and equally weighted criteria. Normalized research priority scores (NRPS) were calculated, and research priority questions were ranked accordingly. Results: A list of 190 priority research questions for improving maternal and perinatal health was scored by 140 stakeholders. Most priority research questions (89%) were concerned with the evaluation of implementation and delivery of existing interventions, with research subthemes frequently concerned with training and/or awareness interventions (11%), and access to interventions and/or services (14%). Twenty-one questions (11%) involved the discovery of new interventions or technologies. Conclusions: Key research priorities in maternal and perinatal health were identified. The resulting ranked list of research questions provides a valuable resource for health research investors, researchers and other stakeholders. We are hopeful that this exercise will inform the post-2015 Development Agenda and assist donors, research-policy decision makers and researchers to invest in research that will ultimately make the most significant difference in the lives of mothers and babies.</p

    Antimicrobial and antioxidant activity of kaempferol rhamnoside derivatives from Bryophyllum pinnatum

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    Abstract Background Bryophyllum pinnatum (Lank.) Oken (Crassulaceae) is a perennial succulent herb widely used in traditional medicine to treat many ailments. Its wide range of uses in folk medicine justifies its being called "life plant" or "resurrection plant", prompting researchers' interest. We describe here the isolation and structure elucidation of antimicrobial and/or antioxidant components from the EtOAc extract of B. pinnatum. Results The methanol extract displayed both antimicrobial activities with minimum inhibitory concentration (MIC) values ranging from 32 to 512 Όg/ml and antioxidant property with an IC50 value of 52.48 Όg/ml. Its partition enhanced the antimicrobial activity in EtOAc extract (MIC = 16-128 Όg/ml) and reduced it in hexane extract (MIC = 256-1024 Όg/ml). In addition, this process reduced the antioxidant activity in EtOAc and hexane extracts with IC50 values of 78.11 and 90.04 Όg/ml respectively. Fractionation of EtOAc extract gave seven kaempferol rhamnosides, including; kaempferitrin (1), kaempferol 3-O-α-L-(2-acetyl)rhamnopyranoside-7-O-α-L-rhamnopyranoside (2), kaempferol 3-O-α-L-(3-acetyl)rhamnopyranoside-7-O-α-L-rhamnopyranoside (3), kaempferol 3-O-α-L-(4-acetyl)rhamnopyranoside-7-O-α-L-rhamnopyranoside (4), kaempferol 3-O-α-D- glucopyranoside-7-O-α-L-rhamnopyranoside (5), afzelin (6) and α-rhamnoisorobin (7). All these compounds, except 6 were isolated from this plant for the first time. Compound 7 was the most active, with MIC values ranging from 1 to 2 Όg/ml and its antioxidant activity (IC50 = 0.71 Όg/ml) was higher than that of the reference drug (IC50 = 0.96 Όg/ml). Conclusion These findings demonstrate that Bryophyllum pinnatum and some of its isolated compounds have interesting antimicrobial and antioxidant properties, and therefore confirming the traditional use of B. pinnatum in the treatment of infectious and free radical damages.</p

    How useful are volunteers for visual biodiversity surveys? An evaluation of skill level and group size during a conservation expedition

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    The ability of volunteers to undertake different tasks and accurately collect data is critical for the success of many conservation projects. In this study, a simulated herpetofauna visual encounter survey was used to compare the detection and distance estimation accuracy of volunteers and more experienced observers. Experience had a positive effect on individual detection accuracy. However, lower detection performance of less experienced volunteers was not found in the group data, with larger groups being more successful overall, suggesting that working in groups facilitates detection accuracy of those with less experience. This study supports the idea that by optimizing survey protocols according to the available resources (time and volunteer numbers), the sampling efficiency of monitoring programs can be improved and that non-expert volunteers can provide valuable contributions to visual encounter-based biodiversity surveys. Recommendations are made for the improvement of survey methodology involving non-expert volunteers

    Spitzer Follow-up of Extremely Cold Brown Dwarfs Discovered by the Backyard Worlds: Planet 9 Citizen Science Project

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    We present Spitzer follow-up imaging of 95 candidate extremely cold brown dwarfs discovered by the Backyard Worlds: Planet 9 citizen science project, which uses visually perceived motion in multiepoch Wide-field Infrared Survey Explorer (WISE) images to identify previously unrecognized substellar neighbors to the Sun. We measure Spitzer [3.6]–[4.5] color to phototype our brown dwarf candidates, with an emphasis on pinpointing the coldest and closest Y dwarfs within our sample. The combination of WISE and Spitzer astrometry provides quantitative confirmation of the transverse motion of 75 of our discoveries. Nine of our motion-confirmed objects have best-fit linear motions larger than 1'' yr⁻Âč; our fastest-moving discovery is WISEA J155349.96+693355.2 (ÎŒ ≈ 2.”15 yr⁻Âč), a possible T-type subdwarf. We also report a newly discovered wide-separation (~400 au) T8 comoving companion to the white dwarf LSPM J0055+5948 (the fourth such system to be found), plus a candidate late T companion to the white dwarf LSR J0002+6357 at 5 5 projected separation (~8700 au if associated). Among our motion-confirmed targets, five have Spitzer colors most consistent with spectral type Y. Four of these five have exceptionally red Spitzer colors suggesting types of Y1 or later, adding considerably to the small sample of known objects in this especially valuable low-temperature regime. Our Y dwarf candidates begin bridging the gap between the bulk of the Y dwarf population and the coldest known brown dwarf

    Analyse écorégionale marine de Nouvelle-Calédonie : atelier d'identification des aires de conservation prioritaires

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    Dans le cadre de l'initiative pour les rĂ©cifs coralliens du Pacifique sud (CRISP), le WWF-France a souhaitĂ© dĂ©velopper un projet pour la protection des rĂ©cifs et des lagons nĂ©o-calĂ©doniens. L'atelier, qui s'est dĂ©roulĂ© les 10 et 11 aoĂ»t Ă  NoumĂ©a, avait pour objectif de rassembler les scientifiques et les experts du lagon nĂ©ocalĂ©donien pour identifier, sur la base de leur connaissance experte, les zones les plus remarquables du lagon (richesse, endĂ©misme, originalitĂ© des faunes et flores, espĂšces emblĂ©matiques, zones d'intĂ©rĂȘt fonctionnel) sur lesquelles doivent porter en prioritĂ© les efforts de conservation. Il a permis d'identifier 20 aires prioritaires pour la conservation, parmi lesquelles 6 ont un intĂ©rĂȘt mondial, 4 ont un intĂ©rĂȘt sur le plan rĂ©gional, les autres ayant un intĂ©rĂȘt local

    Maternal and perinatal health research priorities beyond 2015 : an international survey and prioritization exercise

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    Abstract Background: Maternal mortality has declined by nearly half since 1990, but over a quarter million women still die every year of causes related to pregnancy and childbirth. Maternal-health related targets are falling short of the 2015 Millennium Development Goals and a post-2015 Development Agenda is emerging. In connection with this, setting global research priorities for the next decade is now required. Methods: We adapted the methods of the Child Health and Nutrition Research Initiative (CHNRI) to identify and set global research priorities for maternal and perinatal health for the period 2015 to 2025. Priority research questions were received from various international stakeholders constituting a large reference group, and consolidated into a final list of research questions by a technical working group. Questions on this list were then scored by the reference working group according to five independent and equally weighted criteria. Normalized research priority scores (NRPS) were calculated, and research priority questions were ranked accordingly. Results: A list of 190 priority research questions for improving maternal and perinatal health was scored by 140 stakeholders. Most priority research questions (89%) were concerned with the evaluation of implementation and delivery of existing interventions, with research subthemes frequently concerned with training and/or awareness interventions (11%), and access to interventions and/or services (14%). Twenty-one questions (11%) involved the discovery of new interventions or technologies
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