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A HMM-based model to geolocate pelagic fish from high-resolution individual temperature and depth histories: European sea bass as a case study ArchiMer
Woillez, Mathieu; Fablet, Ronan; Tran-thanh Ngo,; Lalire, Maxime; Lazure, Pascal; De Pontual, Helene.
Numerous methods have been developed to geolocate fish from data storage tags. Whereas demersal species have been tracked using tide-driven geolocation models, pelagic species which undertake extensive migrations have been mainly tracked using light-based models. Here, we present a new HMM-based model that infers pelagic fish positions from the sole use of high-resolution temperature and depth histories. A key contribution of our framework lies in model parameter inference (diffusion coefficient and noise parameters with respect to the reference geophysical fields—satellite SST and temperatures derived from the MARS3D hydrodynamic model), which improves model robustness. As a case study, we consider long time series of data storage tags (DSTs) deployed on...
Tipo: Text Palavras-chave: Fish movement; Archival tagging; Migration; Population structure; Hidden Markov Model (HMM); State-space model.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00300/41097/40270.pdf
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A length-structured spatially explicit model for estimating hake growth and migration rates ArchiMer
Drouineau, Hilaire; Mahevas, Stephanie; Bertignac, Michel; Duplisea, Daniel.
Drouineau, H., Mahevas, S., Bertignac, M., and Duplisea, D. 2010. A length-structured spatially explicit model for estimating hake growth and migration rates. - ICES Journal of Marine Science, 67: 1697-1709.
Tipo: Text Palavras-chave: Growth; Length-structured model; Merluccius merluccius; Migration; Spatial model.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00016/12714/9767.pdf
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A re-evaluation of evidence raises questions about the fasting migration hypothesis for Swainson's Hawk (Buteo swainsoni) Hornero
Bechard,Marc J.; Sarasola,Jose H.; Woodbridge,Brian.
We examined the fasting migration hypothesis for Swainson's Hawks (Buteo swainsoni) by estimating the length, duration, and speed of the migration between North and South America and measuring changes in their body masses at various times throughout the year. We instrumented 34 adult Swainson's Hawks with satellite radios on their breeding grounds in western North America to determine the duration, length, and speed of the migration. Migrating south at 188 km/day, it took Swainson's Hawks 51 days to complete their 13504 km migration to their austral summer grounds. Averaging only 150 km/day on their return migration, it took them 60 days to complete the shorter 11952 km migration back to North America. Adult male and female Swainson's Hawks had average...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Body mass; Buteo swainsoni; Fasting; Migration; Swainson's Hawk.
Ano: 2006 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072006000200002
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A spleen tyrosine kinase inhibitor attenuates the proliferation and migration of vascular smooth muscle cells Biol. Res.
Seo,Hyang‑Hee; Kim,Sang Woo; Lee,Chang Youn; Lim,Kyu Hee; Lee,Jiyun; Choi,Eunhyun; Lim,Soyeon; Lee,Seahyoung; Hwang,Ki‑Chul.
Abstract Background Pathologic vascular smooth muscle cell (VSMC) proliferation and migration after vascular injury promotes the development of occlusive vascular disease. Therefore, an effective chemical agent to suppress aberrant proliferation and migration of VSMCs can be a potential therapeutic modality for occlusive vascular disease such as atherosclerosis and restenosis. To find an anti-proliferative chemical agent for VSMCs, we screened an in-house small molecule library, and the selected small molecule was further validated for its anti-proliferative effect on VSMCs using multiple approaches, such as cell proliferation assays, wound healing assays, transwell migration assays, and ex vivo aortic ring assay. Results Among 43 initially screened...
Tipo: Journal article Palavras-chave: Syk kinase inhibitor; BAY61-3606 VSMC; Proliferation; Migration.
Ano: 2017 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602017000100403
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A Theory of Migration as a Response to Occupational Stigma AgEcon
Stark, Oded; Fan, C. Simon.
Drawing on the literature of occupational status and social distance, a theory is developed of labor migration that is prompted by a desire to avoid “social humiliation.” A closed-economy general equilibrium model that incorporates occupational status and examines the interaction between the goods market and the labor market is constructed. This framework is then extended from a closed, single economy to an open economy setting in a world that consists of two countries or two regions. It is shown that as long as migration can reduce humiliation sufficiently, migration will occur even between two identical economies. Hence, a new model of migration is presented in which migration arises from a wish to reap social exposure gains. The model shows that...
Tipo: Working or Discussion Paper Palavras-chave: Migration; Social distance; Occupational status; Social exposure gains; General equilibrium; Consumer/Household Economics; Institutional and Behavioral Economics; Labor and Human Capital; F22; J61; R23.
Ano: 2009 URL: http://purl.umn.edu/55363
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ANÁLISIS DEL DESEMPLEO, LA MIGRACIÓN Y LA POBREZA EN MÉXICO AgEcon
Figueroa Hernandez, Esther; Ramirez Abarca, Orsohe; Gonzalez Elias, J. Martin; Perez Soto, Francisco; Espinosa Torres, Luis Enrique.
Undeveloped economies are dealing with very big issues such as low or null economic growth, higher rates of unemployment, high index of migration and millions of people living in extreme poverty. Therefore, the present investigation aims to analyze unemployment, migration and poverty in Mexico; since unemployment in Mexico has a rate of 5.5% according to INEGI, followed by migration and extreme poverty. One of the most important effects from the previous matters is that they have stimulated people to migrate. Because of the unemployment increase and the low wages in the country it has been stimulated the population to migrate. In addition, in the USA, the unemployment rate of Mexican migrants has raised from 8.0 to 12.0% (2009) approximately, inducing a...
Tipo: Article Palavras-chave: Unemployment; Migration; Poverty; Remittances and income.; Agribusiness.
Ano: 2012 URL: http://purl.umn.edu/120465
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Analysis and visualization of the glass eel behavior (Anguilla anguilla) in the Adour estuary and estimate of its upstream migration speed ArchiMer
Prouzet, Patrick; Odunlami, Marc; Duquesne, Elise; Boussouar, Ahmed.
The studies carried out on the Adour estuary on the migration of glass eels lead to the characterisation of their swimming behavior. Individuals migrate passively with the flood tide current behind the dynamic tide front, and their movements into the water column are linked to the surrounding luminosity and water turbidity. A numerical model was built from observations gathered on glass eel densities during scientific surveys. It uses the outputs of a hydrodynamic model accounting for the variations in the river flow and tide coefficient. It allows the simulation of the displacement of a particle in the longitudinal axis of the estuary. The variation of the vertical movements through the water column takes into account the cloud cover, the moon phases, the...
Tipo: Text Palavras-chave: Numerical modeling; Fish behavior; Migration; Estuary; Hydrodynamics; Exploitation rate; Glass eel; Anguilla anguilla; Atlantic Ocean.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00000/11171/7531.pdf
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Analysis of Vocational and Residential Preferences of Rural Population: Application of an Experimental Technique to Rural Slovenia AgEcon
Zanni, Alberto M.; Davidova, Sophia; Bailey, Alastair.
This study represents the first application of Choice Experiments to the analysis of the monetary and non-pecuniary determinants of vocational choice and spatial labor supply. It identifies the determinants of individual’s choice of jobs and place of residence, and provides a better understanding of the process of rural labor adjustments in a country in transition, Slovenia. The results indicate that the effect of wages, as the main factor influencing employment choice, is counterbalanced by other determinants affecting working conditions and residence. A considerable degree of immobility in terms of migration and commuting has been revealed. As a result, a rapid urbanisation process is unlikely to happen in the near future, according to individuals’...
Tipo: Conference Paper or Presentation Palavras-chave: Choice experiments; Labor supply; Migration; Rural; Slovenia; Community/Rural/Urban Development; Labor and Human Capital; J0; P0; C0.
Ano: 2006 URL: http://purl.umn.edu/25534
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Annual survival of Red Knots (Calidris canutus rufa) using the San Antonio Oeste stopover site is reduced by domino effects involving late arrival and food depletion in Delaware Bay Hornero
González,Patricia M.; Baker,Allan J.; Echave,María Eugenia.
Ecological conditions in breeding and non-breeding areas of migrant birds have been linked to their annual survival and production of young, but the role of stopover sites is under-appreciated. Through banding studies and censuses along the flyway from Tierra del Fuego to the Canadian Arctic, the drastic decline in 2000-2001 of Red Knots (Calidris canutus rufa) population summering in southern South America in the northern winter was shown to be related to the overharvesting of horseshoe crabs (Limulus polyphemus) in Delaware Bay, USA, their last stopover site before reaching their breeding grounds, and to the late arrival of the birds at this site. In San Antonio Oeste, Argentina, where 25-50% of the Tierra del Fuego Red Knots population congregates every...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Calidris canutus; Domino effects; Migration; Population decline; Red Knot; Stopover ecology; Ecología de escala migratoria; Efecto dominó; Migración; Playero Rojizo.
Ano: 2006 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072006000200006
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Aves migratórias ocorrentes no Pantanal: caracterização e conservação. Infoteca-e
NUNES, A. P.; TOMAS, W. M..
Periodicamente o Brasil é visitado por milhares de aves que realizam movimentos sazonais da América do Norte para a América do Sul e vice-versa (Sick 1983, Morrison et al. 1989, Chesser 1994). Dentre as aves que visitam o território nacional, destacam-se aquelas que migram com a proximidade do inverno boreal (Antas 1994). Os migrantes vêm ao Brasil à procura de locais de invernada, onde encontram alimentação farta, propiciando-lhes a continuidade do seu ciclo de vida (Telino Jr. et al. 2003). Estas aves apresentam extraordinária capacidade de percorrer longas distâncias (Hayman et al. 1986; Antas 1989; Morrison et al. 1989; Sick 1983, 1997; Azevedo Jr. et al. 2002, Alerstan et al. 2003). No período de inverno, a baixa oferta de recursos alimentares aliada...
Tipo: Documentos (INFOTECA-E) Palavras-chave: Ave; Migração; Conservação; Identificação; Pantanal; Bird; Migration; Conservation; Identification.
Ano: 2004 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/811658
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Avian Information Systems: Developing Web-Based Bird Avoidance Models Ecology and Society
Shamoun-Baranes, Judy; Universiteit van Amsterdam; shamoun@uva.nl; Bouten, Willem; Universiteit van Amsterdam; w.bouten@uva.nl; Buurma, Luit; Bird Strike Fund; LuitBuurma@worldmail.nl; DeFusco, Russell; BASH Inc.; BirdManRuss@aol.com; Dekker, Arie; Royal Netherlands Air Force; a.dekker@mindef.nl; Sierdsema, Henk; SOVON, Dutch Centre for Field Ornithology; Henk.Sierdsema@sovon.nl; Sluiter, Floris; Universiteit van Amsterdam; fsluiter@science.uva.nl; van Belle, Jelmer; Royal Netherlands Air Force; jelmer.van.belle@hetnet.nl; van Gasteren, Hans; Royal Netherlands Air Force; JR.v.Gasteren@mindef.nl; van Loon, Emiel; Universiteit van Amsterdam; vanloon@uva.nl.
Collisions between aircraft and birds, so-called “bird strikes,” can result in serious damage to aircraft and even in the loss of lives. Information about the distribution of birds in the air and on the ground can be used to reduce the risk of bird strikes and their impact on operations en route and in and around air fields. Although a wealth of bird distribution and density data is collected by numerous organizations, these data are not readily available nor interpretable by aviation. This paper presents two national efforts, one in the Netherlands and one in the United States, to develop bird avoidance nodels for aviation. These models integrate data and expert knowledge on bird distributions and migratory behavior to provide hazard...
Tipo: Peer-Reviewed Insight Palavras-chave: Birds; Distribution; Flight safety; Migration; Spatial modeling; Web services..
Ano: 2008
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Baby Boom Migration and Its Impact on Rural America AgEcon
Cromartie, John; Nelson, Peter.
Members of the baby boom cohort, now 45-63 years old, are approaching a period in their lives when moves to rural and small-town destinations increase. An analysis of age-specific, net migration during the 1990s reveals extensive shifts in migration patterns as Americans move through different life-cycle stages. Assuming similar age patterns of migration, this report identifies the types of nonmetropolitan counties that are likely to experience the greatest surge in baby boom migration during 2000-20 and projects the likely impact on the size and distribution of retirement-age populations in destination counties. The analysis finds a significant increase in the propensity to migrate to nonmetro counties as people reach their fifties and sixties and...
Tipo: Report Palavras-chave: Baby boomers; Migration; Rural development; Life-cycle migration; Population projections.; Agricultural and Food Policy; Community/Rural/Urban Development; Institutional and Behavioral Economics.
Ano: 2009 URL: http://purl.umn.edu/55947
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Behavioral Responses of Northern Leopard Frogs (Rana pipiens) to Roads and Traffic: Implications for Population Persistence Ecology and Society
Bouchard, Julie; Geomatics and Landscape Ecology Research Lab, Department of Biology, Carleton University; julie.bouchard@mail.mcgill.ca; Ford, Adam T.; Geomatics and Landscape Ecology Research Lab, Department of Biology, Carleton University; atford@gmail.com; Eigenbrod, Felix E; Geomatics and Landscape Ecology Research Lab, Department of Biology, Carleton University; felix.eigenbrod@gmail.com; Fahrig, Lenore; Geomatics and Landscape Ecology Research Lab, Department of Biology, Carleton University; lenore_fahrig@carleton.ca.
Tipo: Peer-Reviewed Reports Palavras-chave: Breeding dispersal; Habitat fragmentation; Highway; Migration; Movement; Road avoidance; Road mortality.
Ano: 2009
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Black scabbardfish, Aphanopus carbo, in the northeast Atlantic: distribution and hypothetical migratory cycle ArchiMer
Farias, Ines; Morales-nin, Beatriz; Lorance, Pascal; Figueiredo, Ivone.
The biology, ecology, and dynamics of the deep-sea teleost black scabbardfish in the northeast Atlantic are reviewed. The black scabbardfish is a commercial bathypelagic species found in the NE Atlantic mostly from Iceland to the Canary Islands and Western Sahara, at depths from 800 to 1300 m. The spatial structure of its population is still uncertain, although the existence of one single stock that migrates around the NE Atlantic driven by feeding and reproduction is the most likely hypothesis consistent with available data. This review is based on data from commercial fisheries off the Faroe Islands, Hatton Bank, the west of the British Isles, and Portugal (mainland, Azores, and Madeira) and from Icelandic and Scottish scientific surveys collected...
Tipo: Text Palavras-chave: Deep-water longline fisheries; Migration; Life cycle; Trichiuridae; Aphanopus carbo; North Atlantic Ocean.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00175/28636/27058.pdf
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Brain Drain in Rural America AgEcon
Waldorf, Brigitte S..
The paper aims at understanding changes in the distribution and accumulation of intellectual capital by analyzing migrants' educational profiles across a sample of 303 U.S. counties. The results suggest that newcomers are better educated than the resident population, and the education gap is most pronounced for newcomers from other states. The results further suggest that the educational status of newcomers "in-migrants" is positively related to the educational status of the resident population "stayers", thus implying a further agglomeration of human capital across space. However, for interstate migrants the effect is context-dependent, playing a greater role in urban than in rural settings.
Tipo: Conference Paper or Presentation Palavras-chave: Human Capital; Migration; Brain Drain; Community/Rural/Urban Development; J24; R23.
Ano: 2007 URL: http://purl.umn.edu/9866
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BRD4 inhibition suppresses cell growth, migration and invasion of salivary adenoid cystic carcinoma Biol. Res.
Wang,Limei; Wu,Xiuyin; Wang,Ruolin; Yang,Chengzhe; Li,Zhi; Wang,Cunwei; Zhang,Fenghe; Yang,Pishan.
Abstract Background: Bromodomain-containing protein 4 (BRD4) inhibition is a new therapeutic strategy for many malignancies. In this study, we aimed to explore the effect of BRD4 inhibition by JQ1 on in vitro cell growth, migration and invasion of salivary adenoid cystic carcinoma (SACC). Methods: The human normal epithelial cells and SACC cells (ACC-LM and ACC-83) were treated with JQ1 at concentrations of 0, 0.1, 0.5 or 1 μM. Cell Counting Kit-8 (CCK-8) assay was performed to evaluate cell proliferation. Cell apoptosis and cell cycle distribution was evaluated by Flow cytometry. Immunofluorescence staining was used to examine the expression of BRD4 in SACC cells. The quantitative real-time polymerase chain reaction (qRT-PCR) assay and western...
Tipo: Journal article Palavras-chave: Salivary adenoid cystic carcinoma; BRD4 inhibition; Proliferation; Migration; Epithelial-mesenchymal transition.
Ano: 2017 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602017000100213
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CINCO NUEVOS REGISTROS DE ESPECIES DE AVES PARA LA ISLA MALPELO, PACÍFICO COLOMBIANO Boletín de Investigaciones
Zamudio,Jeisson Andrés.
Five species of birds were recorded for the first time in Malpelo Island. With this information, the total number of birds recorded in the island ascends to 65 species. The new bird records are Upland Sandpiper, Semipalmated Sandpiper, Surfbird, Great Crested Flycatcher and the Northern Waterthrush.
Tipo: Journal article Palavras-chave: Malpelo Island; New bird records; Shorebirds; Landbirds; Migration.
Ano: 2011 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612011000300010
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Cod (Gadus morhua) Migrations in the Gulf of St. Lawrence and Areas South of Newfoundland ArchiMer
Moguedet, Philippe.
During the years 1975, 1976, 1980 and 1982 cod (Gadus morhua) tagging experiments were conducted, inside the Gulf of St. Lawrence and outside in areas south of Newfoundland, by French scientists from IFREMER St. Pierre and Miquelon laboratory, in order to study the population distribution and migration and to complement the experiments carried out by Canadian scientists. The analysis from all recoveries and results from these experiments are presented here. The relevance is that the comparison with the Canadian results would lead to a better understanding of the cod stock exchanges in the area. The migratory patterns were believed to be mainly a response to seasonal environmental condition changes. In winter the cod were noted to migrate from the central...
Tipo: Text Palavras-chave: Cod; Distribution; Environment; Migration; Northwest Atlantic.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/00435/54612/55995.pdf
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Comigrants and friends: informal networks and the transmission of traditional ecological knowledge among seminomadic pastoralists of Gujarat, India Ecology and Society
Patel, Hanoz H. R.; The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India; write2hanoz@gmail.com; Rubio-Campillo, Xavier; Barcelona Supercomputing Center (BSC), Barcelona, Spain; xavier.rubio@bsc.es.
Previous research has shown that social organization may affect the distribution of traditional ecological knowledge (TEK) within local communities of natural resource users in multiple ways. However, in this line of research the potential role of informal relationships has mostly been overlooked. In this article, we contribute toward filling this research gap by studying how two types of informal relationships, namely migration partnership and friendship, affect the distribution of TEK within a community of seminomadic pastoralists from the Kutch area, Gujarat, India. Using social network analysis, we map three networks, migration, men friendship, and women friendship, and compare with similarity-based quantitative approaches the clusters extracted from...
Tipo: Peer-Reviewed Reports Palavras-chave: Friendship; India; Informal relationships; Migration; Pastoralists; Rabari; Social network analysis; Social organization; Traditional ecological knowledge.
Ano: 2016
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COMPARATIVE ANALYSIS OF THE IMPACT OF LABOR OUT MIGRATION AND REMITTANCES ON INCOME AND RICE PRODUCTIVITY IN THE PHILIPPINES, THAILAND AND VIETNAM AgEcon
Paris, Thelma R.; Rola-Rubzen, Maria Fay; Luis, Joyce; Thi Ngoc Chi, Truong; Wongsanum, Chaicharn; Villanueva, Donald.
Out migration from rural areas is increasingly becoming a strategy to get out of poverty. While rice–based agriculture remains to be the backbone in Southeast Asia, majority of the farming households particularly those who produce rice under rainfed conditions remain poor and insecure. This paper examines the relationship between migration and other socio-economic factors on household income using data from 1,874 rice sample farming households in Vietnam (north and south), Thailand (northeast) and Philippines (Luzon island). In the Philippines, remittances contribute about 60 per cent of household income of recipient families. In Thailand and Vietnam, these constitute about 40 per cent of total household income. International migration is most prevalent in...
Tipo: Conference Paper or Presentation Palavras-chave: Migration; Remittances; Income; Rice; Farming systems.
Ano: 2009 URL: http://purl.umn.edu/48030
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