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Registros recuperados: 62
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A bio-economic analysis of experimental selective devices in the Norway lobster (Nephrops norvegicus) fishery in the Bay of Biscay ArchiMer
Raveau, Adriana; Macher, Claire; Mehault, Sonia; Merzereaud, Mathieu; Le Grand, Christelle; Guyader, Olivier; Bertignac, Michel; Fifas, Spyros; Guillen Garcia, Jordi.
Several fleets with various fishing strategies operate as a mixed fishery in the Bay of Biscay. Among the main fleets, bottom trawlers target Norway lobster (Nephrops norvegicus) and, together with gillnetters, they also catch hake (Merluccius merluccius). Trawling leads to average-size catches that are below the minimum landing size (MLS); such catches are discarded since they cannot be sold. These discards result in negative impacts on stock renewal, as most of them do not survive. This also results in an economic loss for both bottom trawlers and gillnetters since these discards represent a future loss of rent. This study, based on the 2009 and 2010 selectivity experiments at sea, assesses the short- and long-term bio-economic impacts of four...
Tipo: Text Palavras-chave: Demersal trawl fishery; Bio-economic analysis; Selectivity; Simulation; Selective device; Nephrops norvegicus; Merluccius merluccius; Atlantic Ocean.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00110/22135/19774.pdf
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A catch curve analysis for east Atlantic and Mediterranean bluefin tuna ArchiMer
Kell, Laurence; Bonhommeau, Sylvain; Fromentin, Jean-marc.
A catch-curve analysis using catch-at-age (CAA) data is performed to evaluate recent changes in selection pattern of the eastern Atlantic and Mediterranean bluefin tuna fishery. This was done in order to detect changes following the implementation of the Recovery Plan.
Tipo: Text Palavras-chave: Bluefin tuna; Catch curves; Management; Selectivity; Stock assessment.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00191/30272/28732.pdf
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A cost-benefit analysis of improving trawl selectivity in the case of discards: The Nephrops norvegicus fishery in the Bay of Biscay ArchiMer
Macher, Claire; Guyader, Olivier; Talidec, Catherine; Bertignac, Michel.
The Nephrops trawl fishery is one of the most important fisheries in the Bay of Biscay. The fishery management essentially relies on conservation measures, a total at I owed catch (TAC) for Nephrops together with a mini mum landing size (MLS) and minimum trawl mesh size (70 mm stretched mesh). These measures have failed to prevent high discard levels of many species that characterize the fishery. Nephrops trawlers thus discard about half of their Nephrops catches in numbers (a third in weight) of which only 30% survive. Nephrops discards mainly occur in younger Nephrops age groups below the MLS. This is a waste for the already overexploited Nephrops stock as well as for the fleet. Based on a bio-economic simulation model, the paper analyses the...
Tipo: Text Palavras-chave: Fisheries management; Discards; Selectivity; Cost benefit analysis; Bio economic simulations; Nephrops norvegicus.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4478.pdf
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African star grass response to postemergence herbicides. Repositório Alice
BRIGHENTI, A. M.; BENITES, F. R. G.; SOUZA SOBRINHO, F. de.
ABSTRACT Cynodon nlemfuensis Vanderyst, commonly called African star grass, is excellent forage in pasture formation and herd feeding. However, little information is available regarding weed management in areas of star grasses. Two field experiments were carried out in 2017 and 2018 to evaluate the response of African star grass to postemergence herbicides. The treatments applied were as follows: 2,4-D (1,340.0 g ae ha-1); 2,4-D + picloram (720.0 +192.0 g ae ha-1 + 0.3% v/v nonionic surfactant); fluroxypyr + picloram (80.0 + 80.0 g ae ha-1 + 0.3% v/v mineral oil); fluroxypyr + aminopyralid (160.0 + 80.0 g ae ha-1 + 0.3% v/v mineral oil); fluroxypyr + triclopyr (320.0 + 960.0 g ae ha-1 + 0.3% v/v mineral oil); bentazon (720.0 g ai ha-1 + 0.5% v/v mineral...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Selectivity; Chemical control; Forage; Pastures; Cynodon nlemfuensis.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118012
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Amélioration de la sélectivité des chalutiers Pêcherie multispécifique – Manche - Mer du Nord (selecmer) ArchiMer
Leonardi, Sophie; Rubin, Alex; Meillat, Marc; Coppin, Franck; Delpech, Jean-paul; Morandeau, Fabien; Larnaud, Pascal.
Ce rapport fait la synthèse des travaux réalisés en 2008 et en 2009 au cours du programme Selecmer. Celui-ci, réalisé à l'initiative des professionnels de la pêche en partenariat avec l'Ifremer, avait pour objectif de travailler à améliorer la sélectivité du chalut de fond qu'ils utilisent afin de diminuer les rejets des individus hors-tailles1, en particulier pour le merlan, tout en limitant les pertes commerciales immédiates. Une première phase a consisté à tester l'efficacité de fenêtres à mailles carrées. La deuxième phase a eu pour objectif de développer une grille sélective. Des essais en bassin et des campagnes vidéo en mer ont permis d'apporter des ajustements aux dispositifs sélectifs. L'ensemble des essais de sélectivité à bord des navires de...
Tipo: Text Palavras-chave: Professional fishermen; Square mehs; Flume tank; Selective grid; North Sea; Channel; Bottom trawl; Selectivity; Fishing; Professionnels; Mailles carrées; Campagnes à la mer; Bassin d'essais; Grille sélective; Mer du Nord; Manche; Chalut de fond; Sélectivité; Pêche.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/rapport-6776.pdf
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Application of Sulfentrazone in Stages of Germination of IAC 90 Cassava Cuttings in Clay Soils and Sandy Planta Daninha
Zimmer,J.S.; Ferreira,S.D.; Ramella,J.R.; Rodrigues-Costa,A.C.P.; Costa,N.V..
Weeds interfere dramatically in the productive potential of cassava; however, information regarding herbicides that are selective to crops is still scarce. Thus, the aim in this study was to assess the initial growth of IAC 90 cassava plants after the application of sulfentrazone at different stages of germination of cassava in clayey and sandy soils. Three experiments were simultaneously deployed: the first experiment consisted in the application of sulfentrazone in the non-germinated stage of cassava cuttings; the second one in the stage of germinated cassavas cuttings (0.9 cm shoots); and the third one in applications in the stage of cassava cuttings with buds emerging (6.5 cm shoots and emerging from the soil). For each experiment the experimental...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Herbicide; Manihot esculenta; Protox inhibitor; Selectivity.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200305
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Associations Between Herbicides and Glyphosate in Agronomic Performance of RR2 Intact Soybean Planta Daninha
CESCO,V.J.S.; ALBRECHT,A.J.P.; RODRIGUES,D.M.; KRENCHINSKI,F.H.; ALBRECHT,L.P..
ABSTRACT: The Roundup Ready (RR) soybean was developed for weed control with the use of glyphosate. Some herbicide combinations with glyphosate has been used in weed control and some effects of this practice may be undesirable in the agronomic performance of RR soybean. The present study evaluated the agronomic performance of RR2 intact soybean applied with associations between herbicides and glyphosate at post-emergence, in two experiments conducted in two municipalities in the state of Paraná, Palotina and Marechal Cândido Rondon. This experiment consisted of seven treatments in a randomized block design with four replications, totaling 28 plots for each municipality. The cultivar used in both experiments was Monsoy 6210 Intact RR2 IPROTM. The variables...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Susceptibility; Selectivity; Phytotoxicity.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100212
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Avaliação da eficiência de herbicidas no controle de plantas daninhas em alfafa. Repositório Alice
SILVA, W. da; VILELA, D.; COBUCCI, T.; HEINEMANN, A. B.; REIS, F. A.; PEREIRA, A. V.; FERREIRA, R. de P..
Objetivou-se neste trabalho avaliar a seletividade e a eficiência de herbicidas no controle de plantas daninhas na cultura da alfafa. Foram desenvolvidas dois experimentos em Anápolis, GO.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Medicago sativa; Seletividade; Mistura de herbicidas; Efficiency; Selectivity.
Ano: 2004 URL: http://www.alice.cnptia.embrapa.br/handle/doc/213635
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Biochemical and Physiological Changes in Rice Plants Due to the Application of Herbicides1 Planta Daninha
LANGARO,A.C.; AGOSTINETTO,D.; OLIVEIRA,C.; SILVA,J.D.G.; BRUNO,M.S..
ABSTRACT The application of herbicides, even if selective, can cause biochemical and physiological changes, resulting in oxidative stress. This stress comes from the accumulation of reactive oxygen species produced due to exposure to the herbicide. However, plants have developed defense strategies, which can be enzymatic or non-enzymatic. The objective of this study was to evaluate the morphological and metabolic changes such as photosynthetic parameters, oxidative damage and antioxidant enzyme activity of rice plants after applying herbicides. For this, a study was conducted in a greenhouse and laboratory and the treatments consisted of application of imazapic + imazapyr, quinclorac, bentazon, cyhalofop-butyl, penoxsulan, bispyribac-sodium and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oryza sativa; Oxidative stress; Lipid peroxidation; Selectivity.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000200277
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Bycatch and discards: from improved knowledge to mitigation programmes Introduction ArchiMer
Rochet, Marie-joelle; Catchpole, Tom; Cadrin, Steve.
Discarding is considered by many as an important problem in world fisheries. In many regions, data collection onboard commercial vessels has intensified, and the understanding of both human and ecological drivers of discards is improving quickly. Discarding patterns vary widely across regions, fisheries, gears, and species. Fishers' responses to regulations and markets explain these complex patterns, on top of resource availability partly driven by environmental fluctuations. This expanded knowledge base provides an appropriate basis for discussing the discard mitigation measures proposed in various settings. In September 2012, a theme session was convened at the ICES Annual Science Conference in Bergen, Norway, to discuss these issues. This themed set of...
Tipo: Text Palavras-chave: Bycatch and discards; Catch quotas; Compliance; Landing obligation; Landing quotas; Market incentives; Minimum landing sizes; Onboard observer programmes; Selectivity.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00202/31353/29911.pdf
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Caractérisation empirique et détaillée des captures : Contribution à l'approche écosystémique des pêches ArchiMer
Fauconnet, Laurence.
The ecosystem approach of sheries requires to rethink sheries management at integrated scales. Knowledge on shing pressure at the community level remains limited while pressure is the lever by which management operates. This work aims at characterizing in detail catches, that is indirectly shing pressure, and to link its components to different management objectives. For doing so, this work relies on analyses of at-sea observer data. The ecosystem approach of sheries requires to rethink sheries management at integrated scales. Knowledge on shing pressure at the community level remains limited while pressure is the lever by which management operates. This work aims at characterizing in detail catches, that is indirectly shing pressure, and to link its...
Tipo: Text Palavras-chave: Pression de peche; Metriques de diversite; Rejets; Communautes marines; Gestion ecosystemique des peches; Selectivite; Observations a bord des navires de peche professionnelle; Comparaison d'engins; Analyses multivariees.; Shing pressure; Diversity metrics; Discards; Marine communities; Ecosystem approach to fisheries; Selectivity; Observations onboard professionnal fishing vessels; Gear comparison; Multivariate analyses.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00256/36717/35331.pdf
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Changes in Photosynthesis and Oxidative Stress in Wheat Plants Submmited to Herbicides Application Planta Daninha
AGOSTINETTO,D.; PERBONI,L.T.; LANGARO,A.C.; GOMES,J.; FRAGA,D.S.; FRANCO,J.J..
The use of herbicides, even in tolerant crops, can cause stress evidenced by increase phytotoxicity affecting growth and development. The objectives of this study were to evaluate herbicides effect from different mechanisms of action in photosynthetic and oxidative stress parameters, as well visual phytotoxicity and wild radish control in wheat crop, cultivar Quartzo. Two trials were conducted where the first one evaluated the photosynthetic parameters on wheat plants in two seasons collection, following the application of herbicides bentazon, clodinafop, iodosulfuron, metribuzin, metsulfuron and 2,4-D; and the second one evaluated wild radish (Raphanus sativus) control, wheat phytotoxicity and yield due to bentazon, iodosulfuron, metribuzin, metsulfuron...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum; Selectivity; ROS; Antioxidant enzymes.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100001
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Chemical control of Pileamicrophylla in cattleya seedlings (Cattleyatenebrosa x Cattleyaleopoldy) Planta Daninha
Battistus,A.G.; Klein,J.; Costa,N.V.; Guimarães,V.F.; Hoffmann,V..
Species of the orchidaceae family are grown for marketing flowers and among them the genus Cattleya stands out. However, due to its slow growth, the substrate is subjected to weed infestation. Therefore, this study aims to evaluate the selectivity and efficiency of herbicides in controlling Pilea microphylla in Cattleya orchid seedlings (Cattleya tenebrosa x Cattleya leopoldy). We used a completely randomized design with four replications. The evaluated herbicides were oxyfluorfen (0, 120, 240 and 480 g ha-1), flumioxazin (0, 12.5, 25 and 40 g ha-1), nicosulfuron (0, 20, 40 and 80 g ha-1) mesotrione (0, 96, 144 and 192 g ha-1), clethodim (0, 60, 84 and 108 g ha-1) and metsulfuron-methyl (0, 1.2, 1.8 and 2.4 g ha-1). At post-emergence applying time, the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Weed; Herbicide; Floriculture; Selectivity.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000400015
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Compatibility of Beauveria bassiana with acaricides Neotropical Entomology
Oliveira,Renato C. de; Neves,Pedro M.O.J..
The in vitro compatibility of the entomopathogenic fungus Beauveria bassiana (Bals.) Vuil. with 12 acaricide formulations was evaluated. The active ingredients Clorfenapyr, Fenpyroximate, Amitraz, Acrinathrin, Hexythiazox, Abamectin, Pyridine, Dimethoate, Pyridaphethion, Fenbutatin Oxide, Azocyclotin and Cyhexatin were tested in three different concentrations (mean concentration - MC, half MC and twice the MC). The formulations tested affected conidial germination, vegetative growth and sporulation of the fungus in different levels. The formulations more compatible with B. bassiana were Avermectin and the pyrethroids. The acaricides belonging to the organophosphate and organostanic chemical groups, however, drastically affected conidial germination as well...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Selectivity; Fungitoxicity; Entomopathogenic fungus; IPM.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000300013
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Compatibility of the fungus Beauveria Bassiana (Bals.) Vuill. (Deuteromycetes) with extracts of neem seeds and leaves and the emulsible oil Neotropical Entomology
Depieri,Rogério A.; Martinez,Sueli S.; Menezes Jr.,Ayres O..
The compatibility of a commercial formula of emulsible neem oil (Azadirachta indica A. Juss.) and of aqueous extracts of neem seeds and leaves with Beauveria bassiana (Bals.) Vuill. was evaluated in vitro. Three experiments were conducted to evaluate the effect of each product on the fungus vegetative growth and on conidia production and viability. The products were incorporated to a culture medium (BDA+E) and distributed into petri dishes, in the following concentrations: 0.15%; 1.5% and 15% (leaf aqueous extract), 1%; 2% and 4% (seed aqueous extract) and 0.5%; 1% and 1.5% (emulsible oil). Vegetative growth and conidia production were the basis for characterization of the aqueous extracts of seeds and leaves and of the emulsible oil, using the T...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Azadirachta indica; Selectivity; Biological control; Entomopathogenic fungus.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000400010
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Diel variation in the ascent of fishes up an experimental fish ladder at Itaipu Reservoir: fish size, reproductive stage and taxonomic group influences Neotropical Ichthyology
Fernandez,Domingo Rodriguez; Agostinho,Angelo Antonio; Bini,Luis Mauricio; Pelicice,Fernando Mayer.
In this study, we evaluated the fish ascent in the experimental ladder at Itaipu Reservoir (Paraná State, Brazil), in relation to diel variation, fish size, reproductive stages and species composition. The study was carried out from October, 1995 to February, 1996 and from November, 1996 to January, 1997 at two points on the ladder (boxes at heights of 10 and 27 m). Twenty-two species were recorded, and Prochilodus lineatus, Pimelodus maculatus, Leporinus obtusidens, Schizodon borellii and Leporinus friderici accounted for 86.6 % of the total catch. Fish length did not differ between diel periods and boxes. On the other hand, fish abundance of the main species was significantly influenced by box position, reproductive stage and diel period. The higher box...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish migration; Fish passage; Selectivity; Non-reproductive fish; Management.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000200016
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Different means contributing to anchored FAD's fishing selectivity in the Lesser Antilles ArchiMer
Reynal, Lionel; Guyader, Olivier; Pau, Cedric; Mathieu, Heloise; Dromer, Clement.
In order to improve the sustainable development of FADs fishing, it is important to reduce the capture of juveniles or species that need a decrease in fishing effort, temporarily or definitively. Through previous statistics data coming from commercial fishing trips and new experimental fishing trips, we compared different gears and techniques selectivity for the species and the size of the capture around FADs. We also compared different type of bait used, the best hours to fish for better productivity and to target adults. Finally we look at the influence of the FAD distance from shore. We observed that fishers’ strategies have a critical influence on FADs setting and targeted species. The further the FAD is deployed and the better yield the fisherman...
Tipo: Text Palavras-chave: Anchored FAD; Artisanal and small scale fishing; Selectivity.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00230/34091/32527.pdf
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DIFFERENTIAL TOLERANCE OF SUGARCANE CULTIVARS TO CLOMAZONE Planta Daninha
BARCELLOS JÚNIOR,L.H.; PEREIRA,G.A.M.; GONÇALVES,V.A.; MATOS,C.C.; SILVA,A.A..
ABSTRACT Weed control is one of the most relevant costs of sugarcane production. If weeds are not controlled at the right time, the productivity and longevity of sugarcane plantations are reduced. In this crop, chemical control is the most used method, since it is efficient and it has a lower cost. Differentiated tolerance of sugarcane cultivars to the herbicide clomazone has been observed in the fields. However, there is no scientific evidence of this effect on the productivity of crops. This study evaluated the effects of clomazone on three sugarcane cultivars (RB966928, RB93579 and RB867515). Herbicide application was performed 40 days after the emergence of sugarcane plants and 7, 14, 21 and 28 days after the application, the toxicity caused by the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Selectivity; Saccharum spp.; Herbicide.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100267
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Disponibilidade de fitomassa do estrato herbáceo de uma caatinga raleada submetida ao pastejo alternado ovino-caprino. Repositório Alice
PEREIRA FILHO, J. M.; ARAUJO FILHO, J. A. de; CARVALHO, F. C .; REGO , M. C ..
O trabalho foi realizado no Centro Nacional de Pesquisa de Caprinos - CNPC/Embrapa, Sobral Estado do CE, de 1988 a 1994, com o objetivo de avaliar a disponibilidade de matéria seca do estrato herbáceo de uma Caatinga raleada, submetida ao pastejo alternado ovino-caprino. Foram utilizadas fêmeas ovinas Morada Nova e caprinas SRD (Sem Raça Definida) que, em grupos de 10, foram distribuídas em piquetes de 4, 6 e 8 ha. Foi avaliada a disponibilidade de matéria seca de gramíneas e dicotiledôneas herbáceas. O delineamento adotado foi em parcelas subdivididas, com 2 blocos e tratamentos em esquema fatorial cruzado de 3 x 19 (3 taxas de lotação nas parcelas e 19 épocas do ano como subparcelas). A disponibilidade de matéria seca do estrato herbáceo aumentou nas...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Dicotiledônea herbácea; Seletividade; Brasil; Ceará; Sobral; Caprino; Ovino; Gramínea; Taxa de lotação; Goats; Sheep; Grasses; Selectivity; Stocking rate; Feed crops; Brazil.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/531889
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Efeito de inseticidas sobre a emergência de Trichogramma atopovirilia e Anagasta Kuehniella. Repositório Alice
CIOCIOLA JUNIOR, A.; CRUZ, I.; FIGUEIREDO, M. de L .C..
1995
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Milho; Pragas; Controle biologico; Seletividade; Inseticida; Zea mays; Maize; Biological control; Insecticide; Selectivity.
Ano: 1995 URL: http://www.alice.cnptia.embrapa.br/handle/doc/476102
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