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Individuals exhibit consistent differences in their metabolic rates across changing thermal conditions ArchiMer
Auer, Sonya K.; Salin, Karine; Anderson, Graeme J.; Metcalfe, Neil B..
Metabolic rate has been linked to growth, reproduction, and survival at the individual level and is thought to have far reaching consequences for the ecology and evolution of organisms. However, differences in metabolic rate among individuals must be consistent (i.e. repeatable) over at least some portion of their lifetime in order to predict their longer-term effects on population dynamics and how they will respond to selection. Previous studies demonstrate that metabolic rates are repeatable under constant conditions but potentially less so in more variable environments. We measured the standard (= minimum) metabolic rate, maximum metabolic rate, and aerobic scope (= interval between standard and maximum rates) in juvenile brown trout (Salmo trutta)...
Tipo: Text Palavras-chave: Aerobic scope; Consistency; Maximum metabolic rate; Standard metabolic rate; Stability; Thermal repeatability.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00414/52585/53425.pdf
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Systematic notes on Asian birds. 51. Dates of avian names introduced in early volumes of the Journal of the Asiatic Society of Bengal Naturalis
Dickinson, E.C.; Pittie, A..
The Journal of the Asiatic Society of Bengal contains many new names of birds and other animals but accurate dating of the new names is difficult. The Society wanted it to contain a monthly meteorological report and in many, if not most, years deliberately issued the journal early in the month after that covered by this report, thus the December issue would normally have appeared in January. However, this pattern broke down due to the ill-health of the editor and periodic financial crises, resulting in backlogs of four months or more. Here, we focus solely on papers in which new birds are named and where it has been suggested that the imprint year was not the year of publication. We note the inconsistent dating of these papers in the past and recommend the...
Tipo: Article / Letter to the editor Palavras-chave: Bibliography; Consistency; Dates of publication; Charles Davies Sherborn; Charles Richmond; 42.83.
Ano: 2006 URL: http://www.repository.naturalis.nl/record/209965
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Testing for Consistency in Tourists' Willingness to Pay for New Nature Reserves in the Gulf of Morbihan (France) AgEcon
Voltaire, Louinord; Nassiri, Abdelhak; Bailly, Denis; Boncoeur, Jean.
In this paper, we develop an empirical test of consistency in contingent willingness to pay (WTP) responses, which is based on the following a priori expectation. In economics, when an individual considers paying for public goods, his decision to pay, and his WTP are based on utility-maximising behaviour. Accordingly, supposing other factors are identical, if individual A expresses greater interest in paying for public goods in general than individual B, that is because A receives more benefits from the use and/or the non-use of these goods than B. Continuing with this logic, if both individuals are asked about their WTP for a precise public good, A should logically be more likely to pay and should be willing to pay more than B. Thus, the test consists in...
Tipo: Conference Paper or Presentation Palavras-chave: Contingent valuation; Consistency; Endogeneity; Consumer/Household Economics; Resource /Energy Economics and Policy; C24; D12; Q26.
Ano: 2011 URL: http://purl.umn.edu/114378
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CONSISTENCY OF QUALITY CHARACTERISTICS IN HARD RED SPRING WHEATS; SUMMARY AgEcon
Dahl, Bruce L.; Wilson, William W..
Greater sophistication of buyers in the wheat market has increased demands for higher quality wheats and focused attention on the consistency of the quality of wheat purchased. In this study, the variability of wheat quality characteristics was examined at different stages of the marketing chain. Variability was measured by variety and at farm and export levels. Comparisons were made with Canada where similar data were available. Different measures of variability were utilized where data were available. Inter-year variability, intra-year variability, and within-lot variability of wheat quality characteristics were measured at different points in the wheat marketing chain in the United States and Canada. Variability of many characteristics was...
Tipo: Working or Discussion Paper Palavras-chave: Quality; Consistency; Quality Variability; Wheat Export Quality; Farm Production Quality; Wheat Variety Quality; Canada; United States; Production Economics.
Ano: 1998 URL: http://purl.umn.edu/23305
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IS A PUBLIC REGULATION OF FOOD PRICE VOLATILITY FEASIBLE IN AFRICA? AN ARCH APPROACH IN KENYA AgEcon
Maitre d'Hotel, Elodie; le Cotty, Tristan; Jayne, Thomas S..
The 2007-2008 food crisis and current food price swings led economists to re-evaluate the potential for policy instruments to manage food price volatility. Many developing countries recently pursued price regulation policies, but the difficulties of these policies in promoting price stability is not fully understood. In particular, the ability of a stabilization policy to lower food price volatility does not depend on the nature of the policy instrument only, but also on the institutional conditions of its implementation. Kenya is a particularly interesting case as it is characterized by a rather long tradition of public intervention, and by the persistence of highly volatile prices. The consistency of the policy use appears to be key factor influencing...
Tipo: Presentation Palavras-chave: Volatility; Predictability; Consistency; Food; Policy; Kenya; Food Security and Poverty; International Development; Risk and Uncertainty; D84; Q13; Q18.
Ano: 2012 URL: http://purl.umn.edu/122551
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CONSISTENCY OF QUALITY CHARACTERISTICS IN HARD RED SPRING WHEATS AgEcon
Dahl, Bruce L.; Wilson, William W..
Greater sophistication of buyers in the wheat market has increased demands for higher quality wheats and focused attention on the consistency of the quality of wheat purchased. In this study, the variability of wheat quality characteristics was examined at different stages of the marketing chain. Variability was measured by variety and at farm and export levels. Comparisons were made with Canada where similar data were available. Different measures of variability were utilized where data were available. Inter-year variability, intra-year variability, and within-lot variability of wheat quality characteristics were measured at different points in the wheat marketing chain in the United States and Canada. Variability of many characteristics was...
Tipo: Working or Discussion Paper Palavras-chave: Quality; Consistency; Quality Variability; Wheat Export Quality; Farm Production Quality; Wheat Variety Quality; Canada; United States; Production Economics.
Ano: 1998 URL: http://purl.umn.edu/23455
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Definitions of Biodiversity and Measures of Its Value AgEcon
Simpson, R. David.
The destruction of natural habitats has prompted concerns about the loss of biological diversity. Regrettably, however, there is no consensus among either biologists or economists on the most meaningful measures of biodiversity. Fundamentally different definitions are useful in asking fundamentally different questions. Considerable attention has been given to the value of diversity in search models. A measure of "aggregate variability" is appropriate to such models. Values derived from search models tend to be well behaved; they exhibit diminishing returns in diversity. In contrast, a definition of diversity as "relative abundance" is more appropriate to more complex objective functions. Values derived in these models are not necessarily well behaved. The...
Tipo: Working or Discussion Paper Palavras-chave: Biological diversity; Biodiversity; Diversity index; Abundance; Search; Variability; Consistency; Contingent valuation; Diminishing returns; Increasing returns; Environmental Economics and Policy; D43; D83; Q20.
Ano: 2002 URL: http://purl.umn.edu/10551
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Incorporation of lactations with non-conventional drying-off causes in genetic evaluation of Gyr dairy cattle R. Bras. Zootec.
Reis Filho,João Cruz; Toral,Fábio Luiz Buranelo; Verneque,Rui da Silva; Vercesi Filho,Anibal Eugênio; Torres,Robledo de Almeida; Euclydes,Ricardo Frederico.
Test-day records of milk yields from the first three lactations were used to verify consequences of incorporation of lactation with non-conventional drying-off causes in genetic evaluation of Gyr dairy cattle. The first file (File1) was composed of test-day records of lactations with conventional drying-off causes. In the second file (File2), the test-day records of lactations with non-conventional drying-off causes were included, such as drying-off by death or separation of the calf, disease, death or sale of cow, and removal of cow from milking control. Data were analyzed by mixed models, using an autoregressive process to adjust the random effects of long-term and short-term environment. The inclusion of test-day records from lactations with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Autoregressive; Consistency; Database; Environmental; Genetic parameters.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000900008
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Use of testicular tone and echogenicity in identifying boars with low sperm quality Arq. Bras. Med. Vet. Zootec.
Paschoal,A.F.L.; Santos,J.T.; Mellagi,A.P.G.; Bernardi,M.L.; Wentz,I.; Bortolozzo,F.P..
ABSTRACT This study aimed to evaluate the use of some testicular traits to identify boars with low sperm morphological quality. The consistency (scores from 1 to 5), tone with tonometry (mm), parenchyma echogenicity and heterogeneity with ultrasound (pixel) were assessed in 402 mature boars (18.5 months on average). Sperm abnormality thresholds (≤ 25% of total sperm abnormalities, ≤ 5% of heads, acrosome, neck or midpiece defects, ≤ 10% tail defects, and 15% cytoplasmic droplets) were used to classify boars as approved or disapproved. Three classes of testicular traits were formed (extremely low and high values, approximately 15% each, were kept in separated classes). When the traits were individually evaluated, fewer boars were approved if the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Andrology; Breeding soundness; Consistency; Echotexture; Morphology; Spermatozoa.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000401277
Registros recuperados: 9
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