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An adaptive view of caste differentiation in the neotropical wasp Polybia (Trichothorax) sericea Olivier (Hymenoptera: Vespidae) Neotropical Entomology
Desuó,IC; Souza-Galheico,CB; Shima,SN; Santos,GMM; Cruz,J D; Bichara Filho,CC; Dias,CTS.
The tribe Epiponini comprehends the swarm-founding Neotropical wasps, with several species endemic to Brazil, which are extremely important in studies of social evolution of wasps. The Epiponini diverge in several ways from the definitions of high eusociality, since caste syndromes range from species without morphological caste differentiation to those with complete caste dimorphism, and all species are polygynous. Frequently, indirect studies based on morphometry and physiology are the only solutions to collect data regarding the natural history and caste system in this tribe, since most species are extremely aggressive and build enveloped nests, usually in places of difficult access. We analyzed morphological parameters in seven colonies of the Epiponini...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Social insect; Morphological difference; Epiponini.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000600004
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Effects of glycerol on the metabolism of broilers fed increasing glycerine levels Rev. Bras. Ciênc. Avic.
Romano,GG; Menten,JFM; Freitas,LW; Lima,MB; Pereira,R; Zavarize,KC; Dias,CTS.
This study evaluated the metabolic response of broilers fed diets containing increasing crude glycerine levels in two bioassays. Birds were house in metabolic cages, and were distributed according to a completely randomized experimental design with five treatments of 4 replicates each (1st assay: 5 birds/ cage; 2nd assay: 1-20 days = 8 birds/ cage, and 21-42 days = 4 birds/cage). Treatments consisted of a control diet based on corn and soybean meal, and four other diets containing 2.5%, 5.0%, 7.5% and 10.0% glycerine derived from biodiesel. In experiment I, there was no effect (p>0.05) of glycerol level on liver weight or blood parameters. Serum blood glycerol levels of the birds fed 10% crude glycerine increased during the first nine days of diet...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alternative feedstuffs; Energy source; Nutrition; Feed.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000100014
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Evaluation of Dietary Glycerin Inclusion During Different Broiler Rearing Phases Rev. Bras. Ciênc. Avic.
Freitas,LW; Menten,JFM; Zavarize,KC; Pereira,R; Romano,GG; Lima,MB; Dias,CTS.
ABSTRACT The objective of this study was to evaluate the effect of the dietary addition of different levels of glycerin on the performance, litter moisture, pododermatitis incidence, and carcass and parts yield of broilers. In total, 1,610 broilers were reared in 35 pens with 46 birds each. A completely randomized experimental design, with five treatments with seven replicates was applied. The experimental treatments were: T1: control diet; T2: dietary inclusion of 5% glycerin from 1-42 days of age; T3: dietary inclusion of 10% glycerin from 1-42 days of age; T4: dietary inclusion of 5% glycerin from 7-42 days of age; T5: dietary inclusion of 10% glycerin from 7-42 days of age. The diets containing glycerin fed since the pre-starter period improved broiler...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alternative feedstuff; Biodiesel; Broiler litter nutrition; Pododermatitis.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000500091
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Metabolizable Energy For Chickens Of High And Low Density Corn Fractions Segregated In Densimetric Table Rev. Bras. Ciênc. Avic.
Komatsu,GSN; Dias,CTS; Suckeveris,D; Pereira,R; Fujikura,VK; Burin Jr,AM; Menten,JFM.
ABSTRACT Corn is the main energy feed used in broiler chickens rations in most countries. In the literature, there are indications that high density corn segregated in densimetric table contains higher value of metabolizable energy than the corresponding fraction of low density, but the reasons are not clear. This study was conducted to determine the metabolizable energy of different types of corn, segregated in densimetric table, for poultry. The corn types were selected by the texture of grain (flint, semi-dent and dent) and were planted in the same area. Semi-dent grain corn was used as standard, and the flint and dent grains were segregated in a densimetric table to separate 25% of the total as high density and 25% as low density. The flint, semi-dent...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Corn; Densimetric table; Hectoliter weight; Metabolizable energy.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000200303
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