29 research outputs found

    Prediction of fat and flight muscle mass of <i>piersmai</i> red knots upon arrival at breeding grounds.

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    <p>Fat and protein consumptions during flight were simulated according to <i>Flight</i> Program. Only birds with sufficient mass (body mass >158 g) for arrival at the breeding grounds were analyzed. The open symbols indicate a bird with a body mass of 178.7 g, which was the average body mass of birds captured during the last week of staging.</p

    Body mass (mean ± SD) of red knots (<i>Calidris canutus piersmai</i>) captured on different dates.

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    <p>A total of 486 birds were sampled in 2008–2012 on the coast of the north Yellow Sea during northward migration. The solid line indicates least-square linear regression of total birds and the dashed lines indicate the linear regression of the females (red) and the males (blue).</p

    Regression analyses of the relationship between body components and body mass of <i>piersmai</i> red knots.

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    <p>Fuel deposition models are described with body mass as the independent variable and different body components as dependent variables, including fat mass (A), total lean dry mass (B), lean dry mass of flight muscles (C), gizzard (D), other nutrient organs (E) and leg muscles (F). Each point represents data from an individual bird. Significant regressions are presented with solid lines and insignificant regressions with dashed lines. The regression models were selected according to AIC<sub>c</sub> in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0062551#pone.0062551.s001" target="_blank">Table S1</a>. The regression equations are listed in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0062551#pone.0062551.s003" target="_blank">Table S3</a>.</p

    The donkey - a livestock or a pet? (Breeding and use of donkeys in Polabí lowland - a case study)

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    Donkeys have been useful helpers to people especially at transporting burdens and in agriculture for thousands of years. Nowadays they make livelihoods of rural as well as urban inhabitants over all continents easier. The use of donkeys in agriculture and transport is vanishing in developing countries due to the mechanization. We know only little about how and why people keep breeding of donkeys in developing countries. Theoretical part of the thesis tries to summarize previous basic knowledge about breeding and using donkeys. It focuses on domestication of donkeys, their use in history in different parts of the world, current position of donkeys and partly on relations between men and animals from the view of Human-Animal Studies. A research in a part of Polabí lowland is added. The main practical aim of the thesis is to take a look at the phenomenon of breeding donkeys in the Czech Republic in the present and bring any findings about why do people breed donkeys in modern times in this developing country. Research finds how are donkeys bred, what reasons lead breeders to get donkeys and what their real use is. The thesis contributes to popularization of this theme among experts and laymen and suggests methodology for research of breeding donkeys in other areas as well
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