Results 181 to 190 of about 1,362 (210)
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Forage Mass Production, Forage Nutritive Value, and Cost Comparisons of Three‐Way Cover Crop Mixes
Crop, Forage & Turfgrass Management, 2018Core Ideas Oat/radish/clover and oat/turnip/clover are the lowest cost for tonnage and energy. Cover crop mixes differ in protein but exceed requirements for cattle needs. Cover crop mixes differ in fiber, but no effect on cattle intake is expected. Biomass production in wetter and hotter environments results in slightly more tonnage. The use of annual
Jaymelynn K. Farney +3 more
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The regulatory mechanism in mass foraging and the recruitment of soldiers inPheidole
Insectes Sociaux, 1970Observations of the recruitment behaviour ofPheidole within the nest reveal the existence of a complex behavioural mechanism which operates in the recruitment of nestmates, including the soldiers, to mass foraging. Highly excited recruiters, arriving at the nest, perform, in addition to trail-laying, a motor recruitement display comprising running ...
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Pyrolysis-gas-chromatography-mass-spectrometry for the analysis of forages and by-products
Journal of Analytical and Applied Pyrolysis, 1997Abstract 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, 2006In 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, 2010We 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 +3 more
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Pyrolysis—gas chromatography/mass spectrometry of lignocellulosics in forages and by-products
Journal of Analytical and Applied Pyrolysis, 1991Abstract 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, 2009The 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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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 +6 more
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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 +6 more
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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. +3 more
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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. +3 more
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The Body Mass Allometries as Evolutionarily Determined by the Foraging of Mobile Organisms
Journal of Theoretical Biology, 1995Abstract 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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