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Adjustment of growth parameters for the major body components of pullets Rev. Ciênc. Agron.
Silva,Edney Pereira da; Sakomura,Nilva Kazue; Dorigam,Juliano Cesar de Paula; Malheiros,Euclides Braga; Peruzzi,Nelson José.
ABSTRACT The purpose of this research was analyze the fit of Gompertz function with or without fixing some of the parameters to describe body growth and major bodily chemical constituents of growing pullets. Weekly, data of body weight and chemical components of body free of feathers and feathers were collected from 1,200 chicks of four laying strains (Hisex Brown, Hisex White, Hy Line Brown and Hy Line White W36) until 18 weeks of age. The variables were subjected to two adjustments fixing, or not, some parameters of Gompertz function. The allometric model parameters were calculated for the chemical components. The lipid and protein composition of the body free of feathers were the components with the biggest change in the last weeks. Moreover, the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carcass; Growth curve; Weight protein; Feather.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000300572
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Cell suspension culture as a means to produce polyphenols from date palm (Phoenix dactylifera L.) Ciência e Agrotecnologia
Naik,Poornananda Madhava; Al-Khayri,Jameel Mohammed.
ABSTRACT Date palm accumulates a wide range of secondary metabolites high in nutritional and therapeutic value. In the present study, date palm (Phoenix dactylifera L., cv. Shaishi) shoot-tip-induced callus was used to establish cell suspension cultures in Murashige and Skoog (MS) liquid medium containing 1.5 mg L-1 2-isopentenyladenine (2iP) and 10 mg L-1 naphthaleneacetic acid (NAA). To study the growth kinetics, cultures were maintained for 12 weeks during which weekly measurements were carried out to determine the biomass accumulation based on packed cell volume (%), fresh weight and dry weight (g). In addition, weekly determination of polyphenols (catechin, caffeic acid, kaempferol, and apigenin) was carried out using high performance liquid...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biomass; Growth curve; Packed cell volume..
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000500464
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Comparison of free range broiler chicken strains raised in confined or semi-confined systems Rev. Bras. Ciênc. Avic.
Santos,AL; Sakomura,NK; Freitas,ER; Fortes,CMS; Carrilho,ENVM.
The present study was carried out to compare the growth curve, performance and carcass yield of two broiler strains, Paraíso Pedrês (PP) and ISA Label (ISA), raised in confined or semi-confined systems. It was used a completely randomized design with five replicates, consisting of 20 and 29 birds in semi-confined and confined systems, respectively. Semi-confined birds had free access to pasture at 28 days of age. Performance data were recorded weekly by building growth curves as well as calculating the growth rate. After reaching the recommended body weight (2.5 kg), male birds were slaughtered for physicochemical analysis of carcass, parts and organs. Semi-confined PP and ISA birds showed higher growth potential, higher weight gain, lower feed intake and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Growth curve; ISA Label; Meat quality; Paraíso Pedrês; Raising system.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000200004
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Description of growth and body composition of freshwater angelfish (Pterophyllum scalare) by Gompertz model R. Bras. Zootec.
Espitia-Manrique,Carmen Helena; Fernandes,João Batista Kochenborger; Sakomura,Nilva Kazue; Arias-Vigoya,Ángel Andrés; Nascimento,Thiago Matias Torres do; Silva,Edney Pereira da; Mansano,Cleber Fernando Menegasso.
ABSTRACT The objective of this study was to describe the growth of freshwater angelfish (Pterophyllum scalare) using the Gompertz model, determining the relative growth and allometric coefficients of body components in relation to body weight and protein weight. Six hundred animals were grown until 233 days of age. Data on chemical composition (water, lipid, protein, and ash) and weight measurements were obtained each 30 days. The Gompertz growth equation was used to analyze chemical allometry and to estimate growth parameters. The relationship between chemical components and body protein was estimated. Protein and body weight increased proportionally, with ash being the earliest nutrient (209.2 days), while lipid deposition occurred later. Linear...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allometry; Growth curve; Ornamental fish.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000800631
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Gender on the growth of Criollo foals from birth to three years of age Ciência Rural
Pimentel,Anelise Maria Hammes; Rodrigues,Walvonvitis Baes; Martins,Charles Ferreira; Montanez,Nathanael Ramos; Boligon,Arione Augusti; Souza,João Ricardo Malheiros de.
ABSTRACT: The objective of the present study was to evaluate the effect of gender on the growth of Criollo foals, in order to use this information as a reference for breeding as well as in future research. Body height, thoracic perimeter, and cannon bone perimeter of 75 foals were measured from two farms in Rio Grande do Sul, Brazil (Lat. 32°, 33′, 58″, Long. 53°, 22′, 33″) and from three generations over three years. In both farms, animals were kept under the same range and feeding conditions. Nonlinear regression models were applied to describe the growth curves for the three traits over the experimental period. Cannon bone perimeter was greater in males than in females (P<0.001) but the predicted curves for body height and thoracic perimeter did not...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Horses; Growth curve; Foal development; Morphology; Morphometry.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000100651
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Growth and photosynthetic responses during ex vitro acclimatization of Etlingera elatior (Jack) rm smith (torch ginger) Agronomy
Rodrigues, Marcelo; Paiva, Patrícia Duarte de Oliveira; Freitas, Rodrigo Therezan de; Mansur, Thaís de Oliveira Fontes; Paiva, Renato; Barbosa, João Paulo Rodrigues Alves Delfino.
Torch ginger (Etlingera elatior (Jack) RM Smith) can be propagated in vitro, but there is currently little information about the stages of acclimatization and adaptation for torch ginger in a greenhouse. The objective was to study the growth responses, survival and photosynthetic response during the acclimatization of plants maintained on three different substrates (Plantmax forestry®, sand and 1:1 Plantmax forestry® and sand) under three shading conditions (50% red and blue shading nets and control without shading nets). The highest leaf and shoot numbers per plant and survival rate were observed in treatments with the Plantmax forestry® type substrate in the absence of shading. In vitro culture plants behaved similarly or better than rhizome propagated...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.00.00.00-4 torch ginger; Growth curve; Gas exchange; Photoautotrophy. 5.01.03.06-7.
Ano: 2015 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19707
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Growth curve of Atlantoscia floridana (van Name) (Crustacea, Isopoda, Philosciidae) from a Brazilian Restinga Forest Zoologia
Araujo,Paula Beatriz; Bond-Buckup,Georgina.
The terrestrial isopod Atlantoscia floridana (van Name, 1940) occurs from the U.S.A. (Florida) to Brazil and Argentina. In the southernmost Brazilian State, Rio Grande do Sul, the species is recorded in many localities, in urban and in non-urban areas. The growth curve of Atlantoscia floridana based on field data is presented. The specimens were sampled from April, 2000 to October, 2001 at the Reserva Biológica do Lami (RBL), Rio Grande do Sul. Captured individuals were sexed and had their cephalothorax width measured, with the data analyzed with von Bertalanffy's model. The growth curves for males and females are described, respectively, by the equations: Wt = 1.303 [1 - e-0.00941 (t + 50.37)] and Wt = 1.682 [1 - e-0.00575 (t + 59.13)]. The curves showed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Growth curve; Oniscidea; Terrestrial isopod; Southern Brazil.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752004000100001
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Growth of the crabgrass species Digitaria ciliaris and Digitaria nuda Planta Daninha
Souza,R.C.; Dias,A.C.; Figueiredo,M.R.A.; Obara,F.E.B.; Christoffoleti,P.J.
The aim of this research paper was to compare the growth of D. ciliaris and D. nuda crabgrass species under non-competitive conditions. To this end, two experiments were conducted, one from March - July 2010 and the other from February - June 2011. The experimental design of both trials was completely randomized making a factorial (2 seasons x 2 species crabgrass x 12 evaluation periods) with four replications. Assessments began at 15 days after sowing (DAS), and repeated weekly until 92 DAS. The variables evaluated were total dry matter (roots+leaves+stems), leaf area, leaf number and tiller. The results were submitted to analysis of variance and the absolute growth rate, relative growth rate and leaf area ratio were calculated using the means, which were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Growth curve; Competitive ability and weed biology.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582012000200010
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Growth pattern of friable calluses from leaves of Capsicum annuum var. annuum cv. Iberaba Jalapeño Rev. Ciênc. Agron.
Santos,Mauricio Reginaldo Alves dos; Souza,Carolina Augusto de; Paz,Eloísa Santana.
ABSTRACT The genus Capsicum belongs to the Solanaceae botanical family and is notable for the production of secondary metabolites of medicinal and economical importance. In vitro methods have been successfully utilized for the large scale production of plant secondary metabolites. The objective of this study was to establish a protocol for callus induction from leaves, nodal and internodal segments of the cultivar C. annuum var. annuum cv. Iberaba Jalapeño, and to determine the growth pattern of the calluses, aiming at the identification of the deceleration phase, when the callus cells must be subcultured for the establishment of cell suspensions and the production of secondary metabolites. The explants were inoculated into a medium supplemented with BA...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Callogenesis; Growth curve; Secondary metabolites.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000300523
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Impact of piglet birthweight and sow parity on mortality rates, growth performance, and carcass traits in pigs R. Bras. Zootec.
Zotti,Everson; Resmini,Fábio Arnhold; Schutz,Luis Gustavo; Volz,Nilson; Milani,Raul Pelissari; Bridi,Ana Maria; Alfieri,Amauri Alcindo; Silva,Caio Abércio da.
ABSTRACT A total of 5502 piglets from 435 sows were selected for evaluation of the effect of piglet birthweight and sow parity on mortality rate (MR), growth performance, and carcass traits in pigs. Piglets were distributed into one of eight categories according to their weight (<600, 601-800, 801-1000, 1001-1200, 1201-1400, 1401-1600, 1601-1800, and >1801 g) and sows were classified according to parity (1-5). The maximum MR during lactation (day 0 to day 21) was found in category <600 g, whereas the lowest was observed in categories ≥1401 g. Pigs with greater body weight (BW) at birth were equivalently greater until 59 days of age. Average daily weight gain (ADG) was improved by increasing piglet birthweight between 0 and 21 days as indicated by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carcass quality; Growth curve; Maternal effect; Pig production; Swine.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017001100856
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Mathematical models to predict growth, fillet traits, and composition of wild traíra, Hoplias malabaricus R. Bras. Zootec.
Furuya,Valéria Rossetto Barriviera; Michelato,Mariana; Salaro,Ana Lúcia; Cruz,Thais Pereira da; Urbich,Allan Vinnícius; Ribeiro,Jonathan Willian Andrade; Batista,Dayane Cheritt; Furuya,Wilson Massamitu.
ABSTRACT This study aimed to determine the length-weight relationship and mathematical models to predict dressed and fillet weight and yield and fillet composition of wild traíra, Hoplias malabaricus (Bloch, 1794). A total of 80 marketable-sized fish from 292.28 to 2879.57 g and 32.06 to 61.19 cm were used. The length:weight ratio was estimated using the equation: W = a × L b, in which W is body weight (g) and L is length (cm). The models of dressed and fillet weight and yield and body were elaborated using first-order ( y ^ i = β 0 + β 1 x i ) or second-order ( y ^ i = β 0 + β 1 x i + β 1 x i 2 ) linear regression analyses. The value of slope b in the length:weight ratio was 3.3732 and intercept was 0.0029. The prediction equations...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquaculture; Carcass; Fish; Growth curve; Meat quality.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100158
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Non-linear growth models for bullfrog tadpoles Ciência e Agrotecnologia
Mansano,Cleber Fernando Menegasso; Stéfani,Marta Verardino De; Pereira,Marcelo Maia; Macente,Beatrice Ingrid.
Describing animal growth rate using non-linear models allows a detailed evaluation of growth behavior. Four non-linear models were used to fit weight gain and total length data of bullfrog (Lithobates catesbeianus) tadpoles, as follows: Gompertz, Y = A exp (-exp (-b (t-T))); Von Bertalanffy, Y = A (1 - K exp (-B t))³; Logistic, Y = A (1+ K exp (-B t))-1 and Brody, Y=A (1 - K exp (-B t)). We used 3,240 tadpoles, with average initial weight 0.044 g and average total length 12.79 mm, stage 25 Gosner. The measurements were conducted every ten days on 10% of the animals in every tank. The criteria used to select the model that best described the growth curve were: Residual Mean Square (RMS); determination coefficient (R²); residual graphical analysis; residual...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Frog farm; Growth curve; Lithobates catesbeianus.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000400010
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O crescimento de Aegla leptodactyla Buckup &amp; Rossi (Crustacea, Anomura, Aeglidae) Zoologia
Noro,Clarissa Köhler; Buckup,Ludwig.
The growth study, in length and weight, of Aegla leptodactyla Buckup &amp; Rossi, 1977, was developed based on biometric data of 2,435 specimens collected from Rio da Divisa, a tributary of the Rio Silveira, district of São José dos Ausentes, Rio Grande do Sul State, Brazil. The samplings were realized from April/2000 to July/2001. The captured specimens had recorded the Sex and the length and width of cephalothorax. The specimens from June/2000, November and May/2001 were weighted, and those from June and July/2001 had recorded their length and width of the chelipeds. For the description of the growth the von Bertalanffy's model was utilized. The growth curves in length (mm), for data obtained through the modal progression, are described by the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crustacea; Aeglidae; Aegla leptodactyla; Growth curve.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000200003
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O crescimento de Parastacus defossus (Crustacea: Decapoda: Parastacidae) Rev. Bras. Zool.
Noro,Clarissa K.; Buckup,Ludwig.
The present study investigates the growth of Parastacus defossus Faxon, 1898, a fossorial species known only from Brazil (state of Rio Grande do Sul) and Uruguay. The estimated growth curve was calculated for animals from the wild and for juveniles cultivated in the laboratory. The specimens were collected monthly between January, 2003 to August, 2005, in Lami region, municipality of Porto Alegre, state of Rio Grande do Sul, Brazil. The VON BERTALANFFY (1938) growth model was used to estimate the growth curve . To calculate the modal values from the frequency distributions the software PeakFit 4.12© SeaSolve Inc., was employed. The growth curve for field animals is described by the equation: Lt = 30,98 [1 - e-0,0026 (t+44,86)] and for the juveniles...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crayfish; Growth curve; Von Bertalanffy.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000100009
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Purified glycerin in balanced diets of broiler chickens treated from 1 to 42 days of age R. Bras. Zootec.
Silva,Mônica Calixto da; Vaz,Roberta Gomes Marçal Vieira; Rodrigues,Kênia Ferreira; Stringhini,José Henrique; Sousa,Luciano Fernandes; Fonseca,Flávia Luzia Rodrigues; Augusto,Wescley Faccini; Bezerra,Latóya de Sousa.
ABSTRACT We evaluated the technical feasibility of purified glycerin inclusion in balanced diets of broiler chickens treated from 1 to 42 days of age. A total of 240 broiler chickens were distributed in a completely randomized design into four treatments (0, 2, 4, and 6% purified glycerin inclusion), with six replicates of 10 broilers each. We evaluated productive performance (at 7, 21, and 42 days), edible viscera (heart, liver, and gizzard), carcass yield and cuts, color, chemical and physical composition, as well as protein and fat deposition in the breast muscle. Dietary inclusion of purified glycerin reduced feed conversion and increased feed intake, weight gain, and weight at seven days. From 1 to 21 days, there was a decrease in feed conversion and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodiesel; Energetic feedstuff; Growth curve; Productive performance.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100515
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The population ecology of Securidaca longepedunculata Fresen. in the Nylsvley Nature Reserve, Limpopo Province, South Africa Phyton
Tshisikhawe,MP; Baloyi,O; Ligavha-Mbelengwa,MH; Bhat,RB.
Securidaca longepedunculata Fresen., commonly known as the violet tree, belongs to the family Polygalaceae. It is widely distributed in tropical Africa, Mozambique, as well as in the North- West and Limpopo provinces of South Africa. The Vhavenda people use the roots of this species as an aphrodisiac. The species is co-dominant in the savanna vegetation of the Nylsvley Nature Reserve. This research looked at the ecology of the study species within the Nylsvley Nature Reserve because of its importance there. Understanding the population structure and environmental factors that impact on the species might help in assessing the population in urban areas. The population of the study species in the reserve displayed an adequate growth curve, when looking at its...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Securidaca longepedunculata; Aphrodisiac; Co-dominant species; Urban areas; Growth curve.
Ano: 2012 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572012000100015
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Traditional and alternative nonlinear models for estimating the growth of Morada Nova sheep R. Bras. Zootec.
Souza,Laaina de Andrade; Carneiro,Paulo Luiz Souza; Malhado,Carlos Henrique Mendes; Silva,Fabyano Fonseca e; Silveira,Fernanda Gomes da.
In the present study, alternative and traditional nonlinear models to describe growth curves of Morada Nova sheep reared in the state of Bahia, Brazil, were applied. The nonlinear models were: Schnute, Mitscherlich, Gompertz, Logistic, Meloun I Meloun II, III Meloun, Gamito and Meloun IV. The model adjustment was evaluated by using: Adjusted Coefficient of Determination (R²aj), Akaike Information Criterion (AIC), Bayesian Information Criterion (BIC), Mean Squared Error of Prediction (MEP) and Coefficient of Determination of Prediction (R²p). The selection of the best model was based on cluster analysis, using the evaluators as variables. Six out of the nine tested models converged, while Meloun I and Meloun IV were equally effective in explaining animal...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cluster analysis; Growth curve; Naturalized breed.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000900007
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Use of mathematical models in the study of bodily growth in GIFT strain Nile tilapia Rev. Ciênc. Agron.
Amancio,Alda Lúcia de Lima; Silva,José Humberto Vilar da; Fernandes,João Batista Kochenborger; Sakomura,Nilva Kazue; Cruz,George Rodrigo Beltrão da.
The objective of this study was to evaluate the accuracy of five mathematical models (Gompertz, Logistic, Linear Hyperbolic, Quadratic and Quadratic Logarithmic) to describe the growth curve of GIFT strain Nile tilapia, Oreochromis niloticus, and to characterize the growth trajectory of body parts. To do this, 1,000 fingerlings, with an initial weight of 2.4 g were placed into 20 brick tanks of 2 m³ each, at a density of 25 fish m-3, for 180 days. The animals were fed daily, using the protein levels and number of meals appropriate to each stage. Every two weeks 20 fish were randomly sampled, submitted to a fasting period of 48 h and then slaughtered by thermal shock, in order to determine the weight of the whole fish, the skin without scales, skinless...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oreochromis niloticus; Growth curve; Gompertz; Growth rate.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000200005
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Weight evaluation of Tabapuã cattle raised in northeastern Brazil using random-regression models Arq. Bras. Med. Vet. Zootec.
Oliveira,M.R.; Azevêdo,D.M.; Malhado,C.; Pires,L.; Martins Filho,R.; Sousa Júnior,S..
ABSTRACT The objective of this study is to compare random-regression models used to describe changes in evaluation parameters for growth in Tabapuã bovine raised in the Northeast of Brazilian. The M4532-5 random-regression model was found to be best for estimating the variation and heritability of growth characteristics in the animals evaluated. Estimates of direct additive genetic variance increased with age, while the maternal additive genetic variance demonstrated growth from birth to up to nearly 420 days of age. The genetic correlations between the first four characteristics were positive with moderate to large ranges. The greatest genetic correlation was observed between birth weight and at 240 days of age (0.82). The phenotypic correlation between...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Age; Covariance functions; Growth curve; Legendre polynomials; Livestock.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000200457
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