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Registros recuperados: 13
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Age and growth estimation of bigeye tuna, Thunnus obesus (Teleostei: Scombridae) in the southwestern Atlantic Neotropical Ichthyology
Duarte-Neto,Paulo; Higa,Fábio M.; Lessa,Rosangela P..
The purpose of the current study was to supply the first information on age and growth for Thunnus obesus caught in the equatorial south-western Atlantic using dorsal spines, an approach that has been successfully employed for ageing tuna species. The study was conducted using a multi-model inference based on information theory for back-calculated and observed length-at-age data. Uncertainty associated with the parameter estimation was verified and results were compared to other accounts on the species, considering both the statistical and methodological contexts. Samples were collected in Natal city (Rio Grande do Norte State, Brazil) from February 1999 to January 2000, of tuna vessels and from surveys, aimed at providing information on the Brazilian...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ageing techniques; Dorsal-fin spine; Growth parameters; Multi-model inference.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000100014
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Age and growth of the Argentine hake Merluccius hubbsi Marini, 1933 in the Brazilian South-Southeast Region during 1996-2001 Neotropical Ichthyology
Vaz-dos-Santos,André M.; Rossi-Wongtschowski,Carmen Lúcia D. B..
This is the first detailed study on the age and growth of the Argentine hake Merluccius hubbsi in Brazilian waters. A total of 3,651 specimens obtained from surveys and sampling landings using trawlers and long-lines in the South-Southeast Region (21ºS to 34ºS) between 1996 and 2001 were analyzed. Readings of sliced and burned otoliths were conducted on 686 individuals (397 females, 129 males and 160 young - sex not identified), identifying opaque and translucent zones. Marginal increment and edge type percentage methods were used for validation, resulting in one ring per year, formed during summer-autumn. Fish with no more than eight rings and six years of age were found, the two first rings after the core being formed during the first year....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Merluccius hubbsi; Growth parameters; Otolith; Age structure; South-Southeastern region of Brazil.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000300017
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Age and growth of the white croaker Micropogonias furnieri (Perciformes: Sciaenidae) in a coastal area of Southeastern Brazilian Bight Neotropical Ichthyology
Santos,Rosa S.; Costa,Marcus R. da; Araújo,Francisco G..
ABSTRACT Studies on age and growth of fish populations have direct application in fisheries and contribute for policies of conservation. Our aim was update information on the Micropogonias furnieri growth parameters based on sagittae otoliths annulis readings, and we expected that the studied population from Southeast Brazil can reach more longevity than the reported in the available literature. We examined 286 individuals between August-2010 and July-2011 from Ubatuba Bay, SP. The Total Length ranged 200-480 mm. The determined growth parameters were: Males, L∞ =523.4mm, k = 0.05×year-1, t0 = -8.78 year; Females L∞ = 573.5mm, k = 0.06 × year-1, t0 = -7.49 year. The MI and % of edge type evidenced the formation of one ring per year during autumn/winter,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coastal fishes; Growth parameters; Longevity; Marginal increment; Ubatuba.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000100223
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Comparison of the Quality Adjusting of Nonlinear Models for Organs, Carcass and Body Components in Meat-Type (Coturnix Coturnix Coturnix) and Laying-Type (Coturnix Coturnix Japonica) Quail Rev. Bras. Ciênc. Avic.
Grieser,DO; Furlan,AC; Ribeiro,PM; Zancanela,V; Del Vesco,AP; Gasparino,E; Zardin,AMSO; Marcato,SM.
ABSTRACT The objective of this study was to evaluate the adjustment quality of nonlinear models to data organs growth, carcass and body components of meat-type (Coturnix coturnix coturnix) and japanese laying-type (Coturnix coturnix japonica) quail. A total of 1350 quails from one to 42 d old were distributed in a completely randomized design, with five replicates each. To determine the organs growth (gut, heart, liver and gizzard), carcass and body components (wing, thigh and drumstick, back and breast), two quails per repetition were slaughtered weekly. The data were evaluated in function of different nonlinear models (Logistical, Brody, Richards, Von Bertalanffy and Gompertz). All models studied adjusted the data, differing in adjustment quality. Brody...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gompertz equation; Growth parameters; Breast; Number of interaction; Strains.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000400701
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Determination of optimum levels of nitrogen, phosphorus and potassium of oil palm seedlings in solution culture Bragantia
Mohidin,Hasmah; Hanafi,Mohamed Musa; Rafii,Yusop Mohd; Abdullah,Siti Nor Akmar; Idris,Abu Seman; Man,Sulaiman; Idris,Juferi; Sahebi,Mahbod.
Balanced nutrient elements in fertilizer play a critical role in oil palm seedling successful growth and development, and at the same time reduces of fertilizer losses in the environment. This study examines the effect of different levels of N, P2O5 and K2O for oil palm seedlings in solution culture on growth traits, nutrient uptake in plant tissues and biomass accumulation under nursery conditions. Five concentration levels of N (50, 100, 300, 600 and 900 mg L–1), P2O5 and K2O (15, 30, 60, 90 and 120 mg L–1) were used in a completely randomized design (CRD) with five replications for each. Parameters measured during the growing period include - plant height, leaf number/plant, stem diameter, SPAD chlorophyll value, and at harvest – total leaf area, root...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Growth parameters; Solution culture; Oil palm; Optimum level.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000300247
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Effects of pH and temperature on growth and glycerol production kinetics of two indigenous wine strains of Saccharomyces cerevisiae from Turkey BJM
Yalcin,Seda Karasu; Ozbas,Z. Yesim.
The study was performed in a batch system in order to determine the effects of pH and temperature on growth and glycerol production kinetics of two indigenous wine yeast strains Saccharomyces cerevisiae Kalecik 1 and Narince 3. The highest values of dry mass and specific growth rate were obtained at pH 4.00 for both of the strains. Maximum specific glycerol production rates were obtained at pH 5.92 and 6.27 for the strains Kalecik 1 and Narince 3, respectively. Kalecik 1 strain produced maximum 8.8 gL-1 of glycerol at pH 6.46. Maximum glycerol concentration obtained by the strain Narince 3 was 9.1 gL-1 at pH 6.48. Both yeasts reached maximum specific growth rate at 30ºC. Optimum temperature range for glycerol production was determined as 25-30ºC for the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Production kinetics; Glycerol; Growth parameters; Saccharomyces cerevisiae.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000200024
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Efficacy of a Synthetic Antioxidant Treatment in Stabilizing Poultry Byproduct Meal and Subsequent Impact of the Treated Meal on Selected Growth Parameters of Broilers Rev. Bras. Ciênc. Avic.
Ahmad,H; Khalique,A; Naveed,S; Zia,MW; Rasool,Z; Zahid,U; Moeed,A.
ABSTRACT This study was conducted to investigate the effect of a commercial antioxidant (CAO; Rendox Plus®) treatment in stabilizing the poultry byproduct meal (PBPM) and then the subsequent effect of the treated PBPM on growth of broilers. Five batches A, B, C, D and E of PBPM were treated with CAO at 0, 250, 500, 750 and 1000 mL/ton, respectively and stored for 42 days. Oxidative stability of PBPM was estimated on day 0 and then weekly using Peroxide Value and Thiobarbituric Acid tests. PBPMs treated with 750 &1000 mL/ton presented the least oxidation and were selected to be included in broiler diets. A total of 240 one-day-old non-sexed Hubbard broilers were randomly divided into two flocks of 120 birds each. Each flock was further divided into four...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Broiler; Growth parameters; Poultry byproduct meal; Fat oxidation; Antioxidant slaughter traits.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000300471
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Flooding tolerance of tomato genotypes during vegetative and reproductive stages Braz. J. Plant Physiol.
Ezin,Vincent; Pena,Robert De La; Ahanchede,Adam.
A greenhouse experiment was conducted to investigate the effect of flooding on two tomato cultivars and two wild related species. Forty days old tomato plants were subjected to a continuous flooding stress of different durations: 0, 2, 4 and 8 days. Plant pots were placed inside larger plastic pots; they were irrigated with excessive quantity of tap water at 25ºC so that the level of water above the surface of soil was 15 cm throughout the flooding period. At the bottom of each plastic pot a drilled hole allowed complete drainage of the pot after flooding. Parameters studied include plant height, number of leaves, leaf length, chlorophyll fluorescence, chlorophyll content, wilting, leaf senescence, adventitious root formation, number of flowers and fruits...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tomato genotypes; Flooding conditions; Chlorophyll; Growth parameters; Yield and yield components.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202010000200007
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Germination of Mansonia altissima (A. Chev.) A. Chev. var. altissima: an endangered valuable timber species in Africa Biological Sciences
Oseni, Ojo Michael; Nailwal, Tapan Kumar; Pande, Veena.
The in vitro seed germination which results in the production of disease-free seedlings and greenhouse germination of the seeds of Mansonia altissima was investigated in order to establish a better way of germination of the timber species. Five levels of GA3 treatment were used in in vitro germination with three replicate and two seeds were inoculated in each of the jam bottle. Whereas, in greenhouse germination, five levels of different treatments were used, replicated three times and each Petri plate contained 15 seeds. The experiment was repeated twice and the data from each experiment was put together and used for the statistical analysis. The results showed that seeds germination occurred eight days after inoculation in in vitro but in the case of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: MS médium; GA3; In vitro; Growth parameters; Greenhouse; Seed.
Ano: 2020 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/47448
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Heritability estimation and genetic correlations for mature weight, visual scores, and growth traits in Nellore cattle R. Bras. Zootec.
Koetz Junior,Celso; Roso,Vanerlei Mozaquatro; Fávaro,Patricia da Cruz; Pereira,Gabriel Ribas; Borges,Marcelo Henrique Favaro; Barca Junior,Flávio Antônio; Barcellos,Júlio Otávio Jardim; Ribeiro,Edson Luis de Azambuja.
ABSTRACT This study was intended to estimate the genetic associations between growth traits and visual scores with possible changes in mature weight (MW) in 397,900 Nellore animals. A bi-character analysis was performed to estimate the (co)variances and genetic parameters for MW, which comprises the following traits: conformation, finishing precocity, musculature at weaning (WC, WP, and WM) and yearling (YC, YP, and YM), birth weight (BW), weight from birth to weaning (WG), weight from weaning to yearling (YG), and final index (FIND). The observed mean MW was 417.6±56.2 kg, and the direct genetic effect mean estimated heritability ( h 2 a 1) of MW was 0.45. Overall, the BW was 31.0±3.7 kg, and the estimated h² was 0.34. The heritability estimate of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beef cattle; Growth parameters; Productive traits; Selection.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100301
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Models for the analysis of growth curves for rearing tinamous (Rhynchotus rufescens) in captivity Rev. Bras. Ciênc. Avic.
Tholon,P; Queiroz,SA.
Growth curves models provide a visual assessment of growth as a function of time, and prediction body weight at a specific age. This study aimed at estimating tinamous growth curve using different models, and at verifying their goodness of fit. A total number 11,639 weight records from 411 birds, being 6,671 from females and 3,095 from males, was analyzed. The highest estimates of a parameter were obtained using Brody (BD), von Bertalanffy (VB), Gompertz (GP,) and Logistic function (LG). Adult females were 5.7% heavier than males. The highest estimates of b parameter were obtained in the LG, GP, BD, and VB models. The estimated k parameter values in decreasing order were obtained in LG, GP, VB, and BD models. The correlation between the parameters a and k...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Growth parameters; Growth evaluation; Non-linear models; Wild birds.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000100004
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Relationship of post-weaning growth and age at puberty in crossbred beef heifers R. Bras. Zootec.
Pereira,Gabriel Ribas; Barcellos,Júlio Otávio Jardim; Sessim,Amir Gil; Tarouco,Jaime Urdapilleta; Feijó,Fernanda Dornelles; Braccini Neto,José; Prates,Ênio Rosa; Canozzi,Maria Eugênia Andrighetto.
ABSTRACT This study was intended to evaluate body size structure and growth parameters of crossbred heifers fed at four nutritional levels to achieve puberty earlier. Animals were classified depending on their level of crossing between Nelore and Hereford and subjected to four nutritional levels (kg day−1) as follows: 0.5 (light; n = 32), 0.75 (medium; n = 32), 1.00 (high; n = 29), and 1.25 (very high; n = 27). Heifers at puberty and at weaning were individually classified for growth parameters. The fat thickness and longissimus muscle area throughout the experimental period were determined by ultrasonography. The height, heart girth, frame, and weight:height ratio were variables used to evaluate body traits. Univariate analysis of variance using the GLIM...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Beef heifers; Growth parameters; Nutrition diets; Productivity; Ultrasonography.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000500413
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水芋在不同栽培季節之生長分析 Taiwan Agricultural Research Institute
陳烈夫; 呂椿棠; 呂秀英; Lit-Fu Chan;Chun-Tang Lu;Hsiu-Ying Lu.
[[abstract]]本研究在台灣省農業試驗所進行水田檳榔心芋之週年栽培試驗,自1995年l月至1996年11月每隔二個月種植一次,共兩年十二個種植期,調查不同栽培季節下水芋在各生育期間的葉數、葉面積及植株各部位乾物質重,並估算各種生長介量,藉以解析不同栽培季節水芋全生育期間的生長差異,同時檢視氣象因素對水芋生長分析之季節變異性的影響。結果得知,氣溫及日射量是影響水芋生長的重要氣象因素。而不同栽培季節間的同化物質之累積及球莖產量之不同,受葉片生長差異影響甚於淨同化速率。水芋葉片的生長主要決定於葉面積的擴展速率及持續期,至於葉片數目及葉片密度的影響則不大。本省中部地區以l~3月種植期為水芋最適栽培季節,其地上部生長旺盛期高溫及高日射量,葉片生長速率較快且持續時間較長,可使LAI曲線達到較大的高峰值,故供源強度充足,可加速球莖膨大充實。反之,7~9月種植期較不利於栽種水芋,其地上部生長旺盛期低溫及低日射量,芋葉生長不良且持續時間較短,LAI曲線沒有明顯的高峰值,使早期供源不足及分配過程受到限制,故不利於球莖膽大。5月及11月種植期的葉片發育表現則介於1~3月及7~9月種植期之間,但因為地上部生長旺盛期容易受到颱風之異常氣候影響,生長表現較不穩定,故生產風險相對較大。
Palavras-chave: 芋 週年栽培試驗 生長介量 球莖產量 氣象因素 季節性變異 Taro; Year-round experiment; Growth parameters; Net assimilation rates; Corm yield; Climate factors; Seasonal variation [[classification]]1.
Ano: 1998
Registros recuperados: 13
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