Results 231 to 240 of about 20,560 (258)

Pyrolysis-gas-chromatography-mass-spectrometry for the analysis of forages and by-products

Journal of Analytical and Applied Pyrolysis, 1997
Abstract Forages and by-products, such as stovers and hulls, are important ruminant feedstuffs. Considerable effort is expended on composition determination, including research to better understand the relationship between composition and utilization by ruminants.
James B. Reeves, Barry A. Francis
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Capture and mass change: perceived predation risk or interrupted foraging?

Animal Behaviour, 2006
In animals such as birds that are capable of adjusting energy reserves behaviourally in response to starvation risk and predation risk, mass is a measure of an individual's perception of the risks in its environment. Although it is often necessary to capture and handle animals to allow the scientific study of animal behaviour, little is known about how
Ross Macleod, Andrew G. Gosler
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Bat heart mass: correlation with foraging niche and roost preference

Australian Journal of Zoology, 2010
We found that the spirit-preserved hearts of 34 species of Australian bat, representing 6 families, weighed from 0.3 to 0.65% of bat mass (mbat), a variation factor of two. The average mass of the heart specimens of the 34 species was 0.501% of bat mass and this did not vary with bat mass.
R. D. Bullen, N. L. McKenzie, K. E. Bullen, M. R. Williams   +3 more
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Pyrolysis—gas chromatography/mass spectrometry of lignocellulosics in forages and by-products

Journal of Analytical and Applied Pyrolysis, 1991
Abstract Pyrolysis—gas chromatography/mass spectrometry (Py-GC/MS) was performed on 14 forages and by-products treated with sodium chlorite (NaClO2), vegetative wheat plant collected over the course of a growing season and lignins extracted with dioxane/water (C4H8O2/H2O), NaOH, aqueous HCl and HF, and H2SO4 from alfalfa stem, corn stalk, red oak ...
Guido C. Galletti, James B. Reeves
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Foraging decisions in a capital breeder: trade-offs between mass gain and lactation

Oecologia, 2009
The high energetic costs of lactation can lead to fundamental trade-offs in life-history traits, particularly in young females that reproduce before completing body growth. We assessed whether lactating female mountain goats (Oreamnos americanus) used behavioural tactics at fine spatio-temporal scales to increase energy intake to compensate for the ...
Sandra, Hamel, Steeve D, Côté
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Forage mass, nutritional value and decomposition dynamics of forages intercropped with maize in an integrated system in a tropical climate

The Journal of Agricultural Science
Abstract The selection of suitable forages for intercropping with annual crops is a key factor in enhancing the resilience and sustainability of integrated crop-livestock systems (ICLS). This study aimed to evaluate the forage mass, nutritional value, and biomass decomposition dynamics of forages intercropped with maize in an ...
Gustavo Henrique Silva Camargos, Roberto Guimarães Júnior, Allan Kardec Braga Ramos, Marcelo Ayres Carvalho, Lúcio Carlos Gonçalves, Alan Figueiredo de Oliveira, Ângela Maria Quintão Lana   +6 more
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Central place foraging by breeding Cook’s petrel Pterodroma cookii: foraging duration reflects range, diet and chick meal mass

Marine Biology, 2010
Pelagic seabirds are central place foragers during breeding and variation in foraging trip duration and range reflect differences in diet and chick provisioning, through the exploitation of divergent habitats of varying productivity. We tested whether these relationships hold in small procellarriids by equipping chick-rearing Cook’s petrel Pterodroma ...
Rayner, M.J., Hartill, B.W., Hauber, M.E., Phillips, Richard A.   +3 more
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The Body Mass Allometries as Evolutionarily Determined by the Foraging of Mobile Organisms

Journal of Theoretical Biology, 1995
Abstract It is shown that the exponents of eight across species body mass allometries can evolve from the constraints associated to the foraging process of mobile organisms. The explained exponents include those of metabolic rate, lifespan, population density, home range, population energy use, maximum life-time reproduction, maximum rate of ...
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6 A Comparison of Methods for Estimating Forage Mass.

Journal of Animal Science, 2018
T Hudspeth, C A Ahrens, D S Hubbell, S Gadberry   +3 more
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Photosynthetic Physiological Basis of Forage Mass Stability in a Progeny of Rhizome-Rooted ‘Qingshui’ Medicago sativa L.

Agronomy, 2023
Li Xiaolong, Jing Fang, Zhang Huihui
exaly