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| Registros recuperados: 50 | |
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| Le Floc'H, P.; Daures, Fabienne; Brigaudeau, Cecile; Bihel, J.. |
| Indicators of the economic performance of fishing vessels are frequently computed in various countries. In this paper, we use different types of information to assess capital value and the economic performance of fishing vessels. On the one hand, field surveys provide technical and financial information on the main components of fishing capital. On the other hand, book values are given in bookkeeping databases. Both sources of information on fishing capital are used for the same set of vessels, namely the commercial fishing fleet of the French region of Brittany. Based on these two sources, measures of economic performance can be produced for the short term using gross surplus; and for the long term including the cost of capital. The measures of... |
| Tipo: Text |
Palavras-chave: Fishery; Accounting; Production cost; Microeconomic data. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-6257.pdf |
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| Akpalu, Wisdom. |
| This paper employs a dynamic model for crimes that involve time and punishment to analyze the use of a net with illegal mesh size in a management regime where each community claims territorial use right over a fishery but has a discount rate that may differ from the social discount rate. The equilibrium stock and harvest levels are found to be much lower if the regulation is violated. Moreover, the optimal penalty for violation must be decreasing in the shadow cost of taking the risk to fish illegally, and increasing the risk of punishment increases the equilibrium stock level. |
| Tipo: Journal Article |
Palavras-chave: Crime; Dynamic model; Fishery; Regulation; Resource /Energy Economics and Policy. |
| Ano: 2010 |
URL: http://purl.umn.edu/61059 |
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| Ordines, Francesc; Lloret, Josep; Tugores, Pilar; Manfredi, Chiara; Guijarro, Beatriz; Jadaud, Angelique; Porcu, Cristina; Gil De Sola, Luis; Carlucci, Roberto; Sartini, Marina; Isajlovic, Igor; Massutti, Enric. |
| A new approach to recruitment overfishing diagnosis is presented. We hypothesize that condition of recruits should increase when recruitment failures are caused by fishing activity. This would be a consequence of the increase in trophic resource availability, because the population is smaller than that which the ecosystem could support. Temporal series of hake recruit condition were calculated from MEDITS survey data collected in Mediterranean geographical sub-areas (GSAs) 1, 6, 17 and 19 from 1994 to 2015. Multiple linear regressions were used to analyse the relationship between mean annual condition and abundance of recruits and climatic indices in each GSA. Significant correlations were only detected in GSA 6, where 69% of condition variability was... |
| Tipo: Text |
Palavras-chave: Merluccius merluccius; Fishery; Recruits; Condition index; Recruitment overfishing; MEDITS survey. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00513/62458/66762.pdf |
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| CATELLA, A. C.. |
| Informações pesqueiras - conhecer para decidir; Os produtos da pesca profissional artesanal e da esportiva; Delimitação de estoques pesqueiros; O peixe mudou de mão; Novas mudanças no perfil da pesca; Pesque e solte - intencional e não intencional; Nível de exploração da pesca; Espécies subaproveitadas; Agregando valor ao pescado; Peixe de granja e peixe caipira; Conhecimento ecológico tradicional; Perfil do pescador profissional artesanal; Crise do setor turístico pesqueiro; Alternativas para o setor turístico pesqueiro; Novas instituições no cenário da pesca; Gestão participativa; Fatores externos à pesca; Fatores naturais e antrópicos; Escolha do modelo de desenvolvimento. |
| Tipo: Folhetos |
Palavras-chave: Mato Grosso do Sul; Brasil; Fishery; Production; Peixe; Pesca; Produção; Brazil; Pantanal; Fish. |
| Ano: 2003 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/799005 |
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| Halouani, Ghassen; Le Loc'H, François; Shin, Yunne-jai; Velez, Laure; Hattab, Tarek; Romdhane, Mohamed Salah; Ben Rais Lasram, Frida. |
| In order to assist fisheries managers, ecological indicators are needed to evaluate the effects of fishing activities on marine ecosystems and to improve communication of these effects in both public and scientific contexts. Finding appropriate indicators is challenging given the complexity of marine food webs as well as the ecosystem response to fishing pressure. In this study, an end-to-end model developed in the Gulf of Gabes ecosystem (Tunisia) was used to compare the performance of a set of ecosystem indicators in assessing the impact of fishing. This end-to-end model aimed to represent the ecosystem functioning by coupling two existing sub-models, the multispecies individual-based model OSMOSE, representing the dynamics of exploited species and the... |
| Tipo: Text |
Palavras-chave: Ecological indicators; OSMOSE; Ecosystem model; End-to-end model; Marine ecosystem; Fishing impacts; Fishery; Gulf of Gabes. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00464/57604/60172.pdf |
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| Patucca, Audrey. |
| The works carried out during this course (March-August 2015) alowed to correct the datasets and to study the variation in catches of albacore tuna from 1967 to 2014 (except for the years 1987 to 1990) based on 3 gears: the trolling line, the line with cane and the pelagic trawl. Simultaneously, key ICCAT delivred was provide information to expert groups, with a view to defining fishing quotas. Catches released and fishing effort (defined by the number of vessels and the time spent at sea) have varied considerably over these 50 years, and have been increasing in recent years, after having decreased sharply. Fishing today is concentrated on the edge of the continental shelf, whereas it was very oceanic before. It is mainly juveniles that are caught, while... |
| Tipo: Text |
Palavras-chave: Thunnus alalunga; Captures; Atlantique; Pêcheries; Thunnus alalunga; Catch; Atlantic; Fishery. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00388/49927/50501.pdf |
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| Fox, Kevin J.; Grafton, R. Quentin; Kompas, Tom; Che, Tuong Nhu. |
| We present the first ex post study that quantitatively analyses the effects of a licence buyback and enhanced quota trading on the profitability and productivity of individual vessels in a fishery. Using firm-level data and a profit index decomposition method, we find that small and large vessels and three different trawler fleets all experienced substantial productivity gains in the year immediately following a licence buy-back and the establishment of a quota brokerage service. The apparent ongoing benefits of the buy-back and increased quota trading over the sample period are in stark contrast to the generally unfavourable long-term outcomes commonly associated with vessel buy-backs in input-controlled fisheries. |
| Tipo: Journal Article |
Palavras-chave: Capacity reduction; Fishery; Productivity; Quota trading; Productivity Analysis. |
| Ano: 2006 |
URL: http://purl.umn.edu/116929 |
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| Kane, A.. |
| L'aptitude et l'efficience à induire la maturation finale de Prochilodus magdalenae (Steindachner 1878) ont été testées avec deux inducteurs chez des femelles et mâles de bocachico sélectionnés avec des critères morphologiques externes . Leurs effets ont été testés avec deux types de doses (hypothèse de dose définitive haute avec 10 mgkg et 0,075 mg/kg respectivement pour CPE et LHRHa associée à du pimozide à 5 mgkg; hypothèse de dose définitive basse avec e g k g et 0,05 mgkg pour respectivement CPE et LHRHa) et deux schémas d'injections dont l'une avec une seule dose préliminaire (contenant le diième de la dose définitive et espacée de 15 à 16 heures de celle ci) et le second avec deux injections préliminaires (espacées de 24 h). Parallèlement, nous... |
| Tipo: Theses and Dissertations |
Palavras-chave: Fishery; Fishery biology; Fishery biology; Http://aims.fao.org/aos/agrovoc/c_2937. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/2613 |
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| Jordan, Stephen J; United States Environmental Protection Agency, Gulf Ecology Division; jordan.steve@epa.gov; Smith, Lisa M; United States Environmental Protection Agency, Gulf Ecology Division; smith.lisam@epa.gov; Nestlerode, Janet A; United States Environmental Protection Agency, Gulf Ecology Division; nestlerode.janet@epa.gov. |
| Coastal habitat alterations such as the loss of submersed aquatic vegetation (SAV) and hardening of shorelines could have cumulative effects on valuable fishery resources. To investigate this effect, we developed a multiscale modeling framework for blue crab (Callinectes sapidus) in the northern Gulf of Mexico. Areal coverage of shoreline land cover and SAV for Mobile Bay, Alabama, were combined with information from small-scale biological studies and long-term, large-scale commercial fishery data to model the potential effects of marginal habitat losses on the blue crab fishery. We applied stochastic variation in annual recruitment to the fishery to estimate probabilities for sustainable harvests under scenarios of habitat loss. The simulations suggested... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Blue crab; Callinectes sapidus; Fishery; Gulf of Mexico; Habitat; Population model. |
| Ano: 2009 |
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| PINHEIRO,MARCELO A.A.; SOUZA,MARCELO R.; SANTOS,LUCIANA C.M.; FONTES,ROBERTO F.C.. |
| ABSTRACT Ucides cordatus is a relevant fishery resource of Brazilian mangroves and requires legal normative to sustainable use based on stock assessment and management. This study evaluated some population parameters (structure, density, abundance, fishery potential and stock) of this crab species in Brazil Southeast (São Paulo, State), discussing the use of the results to delineate fishery management strategies. Density was monthly evaluated (September 1998 to August 1999), using five sample quadrats of 2x2 m. Density (ind.m-2) was indirectly estimated by counting the opened (with biogenic activity) and closed galleries, and contrasted with flooding level by tides using the vertical distribution of macroalgae in the base of trees. Density of U. cordatus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crab; Crustacean; Fishery; Management; Mangrove; Population. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401381 |
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| Vaini,Jussara Oliveira; Mota,Kenneth Gabriel; Ojeda,Alejandra Paola; Barreiros,João Pedro; Moreira,Renata Guimarães; Hilsdorf,Alexandre Wagner Silva. |
| Abstract The dusky grouper, Epinephelus marginatus, is a well-known and widespread marine fish assessed as endangered by the International Union for the Conservation of Nature. Analyzing the genetic diversity of this species is, therefore, of utmost importance and necessary for conservation purposes. Microsatellites are molecular tools with advantages that are ideal for population analyses. This study provides the first set of species-specific microsatellite loci for E. marginatus that can be applied when assessing both intra- and interpopulation genetic variation. Twenty microsatellite loci were isolated and characterized for the dusky grouper by genotyping 20 individuals obtained from the North Eastern Atlantic Ocean (n = 4) and from the South Western... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Short tandem repeat; Population genetics; Conservation; Fishery; Marine resources. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000100074 |
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| Bertignac, Michel; Auby, Isabelle; Sauriau, Pierre-guy; De Montaudouin, Xavier; Foucard, Julie; Martin, Sophie. |
| As part of a larger project financed by the European Union programme "Community initiative PESCA" on the study of "small scale fisheries" in Aquitaine (France), an estimation of the stock of clams in the Bassin d'Arcachon has been conducted. A two-stage stratified random sampling survey has been designed. Samples have been collected using a Hamon bottom sampler in 237 locations distributed over 24 km2. The clam Tapes philippinarum, which appeared in the basin following a series of aquaculture experiments in the mid eighties, is now the main species accounting for more than 90% of the abundance and the biomass, largely overcoming the European species Tapes decussata. The mean abundance and biomass (26 clams / m2 et l28g / m2) are above those estimated in... |
| Tipo: Text |
Palavras-chave: Palourde; Tapes philippinarum; Tapes decussata; Evaluation stock; Pêche; Pêche à pied; Echantillonnage; Bassin d'Arcachon; Clam; Tapes philippinarum; Tapes decussata; Stock assessment; Fishery; Sampling; Bassin d'Arcachon. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00105/21658/19240.pdf |
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| Tissière, Laurie; Mahévas, Stephanie; Trouillet, Brice. |
| In marine fisheries science, the application of social sciences and the increasing use of a multidisciplinary approach have enriched fisheries research through new paradigms. The stance on fisheries governance aims to complement bio-economic approaches and to break with the “tragedy of the commons” premise by focusing on the institutions and network actors at the heart of knowledge, representations, actions and decisions systems. Although the French-European context is largely determined by The Common Fisheries Policy, governance levers and an organised network of actors have been identified in demersal and benthic fisheries. In the present study, the observation of dialogue meetings identified the stakeholder strategies and interactions used to activate... |
| Tipo: Text |
Palavras-chave: Governance; Fishery; Common Fisheries Policy; Stakeholders; Social interactions. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00423/53474/55105.pdf |
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| Registros recuperados: 50 | |
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