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A preliminary investigation of age and growth of Otolithes ruber from KwaZulu-Natal, South Africa OceanDocs
Fennessy, S.T.; Brash, J.M..
This study investigated age and growth of Otolithes ruber, found in KwaZulu-Natal, South Africa. The specimens were collected from prawn trawlers that operate off the shallow water Tugela Bank and from a recreational boat fishery in Durban. Estimates of age and growth parameters were based on the examination of sectioned sagittal otoliths. There was difficulty in estimating growth parameters for separate sexes because the small fish were not sexed and the numbers of males was low. Periodicity of growth zone formation was assumed to be annual although periodicity of growth zone deposition could not be established by marginal zone analysis. The von Bertalanffy growth curve was used to describe the combined male and female growth of O. ruber: Lt = 419mm TL...
Tipo: Journal Contribution Palavras-chave: SCIAENIDAE; Age; Growth; Type specimens; Growth; Age; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_186.
Ano: 2005 URL: http://hdl.handle.net/1834/1130
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Adoption of strategic management to promote gains in meat lambs of Morada Nova breed. Repositório Alice
LIMA, L. D. de; SHIOTSUKI, L.; ALBUQUER, F. H. M. A. R. de; FACO, O.; DUARTE, T. F.; KATO, H. C. de A.; BATISTA, A. S. M.; SOUSA, D. R. de..
2014
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Creep feeding; Rendimento de carcaça; Raça Morada Nova; Ovino; Cordeiro; Abate; Idade; Sheep; Age; Lamb meat; Mutton.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1009119
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Age and growth of blackfin tuna (Thunnus atianticus) caught under moored fish aggregating devices, around Martinique Island ArchiMer
Doray, Mathieu; Stequert, Bernard; Taquet, Marc.
Daily growth increments measured in the otolith of Thunnus atlanticus were used to estimate the age and growth of individuals. which were sampled from an artisanal fishery operating around fish aggregating devices (FADs) moored off Martinique Island. In this study, 76 otoliths were analysed for fish ranging from 20 to 68 cm fork lengths (FL). The fish were caught using trolling lines at depths ranging from 0 to 10 m. Counts were made, under a light microscope, on the external part of the transverse section of the sagittae, from the primordium to the ventral edge. The mean coefficient of variation of the age reading was 2.4%. To validate readings, the number of increments for 11 individuals was counted using both optic and scanning electron microscopes. The...
Tipo: Text Palavras-chave: Thunnus atlanticus; Daily increment; Otolith; Age.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/publication-396.pdf
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Age and growth of the striped seabream, Lithognathus mormyrus (Actinopterygii: Perciformes: Sparidae), in the central coast of Algeria, Mediterranean Sea ArchiMer
Boufersaoui, Samira; Kassar, Abderrahmane; Mokrane, Zakia; Elleboode, Romain; Mahe, Kelig.
Background. Striped seabream, Lithognathus mormyrus (Linnaeus, 1758), is a bony fish, which has a high economic value on the Algerian coast. Because of the increasing fishing pressure, however, a close monitoring is recommended. The information about the biology of this species, occurring in the south-western Mediterranean Sea and especially in the north African coast, is very limited. The presently reported study provides new estimated data on age and growth parameters of striped seabream in Algeria. Materials and methods. A total of 449 specimens of L. mormyrus were sampled for 2 years (January 2013 to December 2014) from the commercial fishery in the central part of the Algerian coast. The samples were collected monthly. The fish ranged in size from...
Tipo: Text Palavras-chave: Lithognathus mormyrus; Otolith; Age; Growth; Algerian coast; Mediterranean Sea.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00473/58448/61028.pdf
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Age, condition and dominance-related sexual ornament size before and during the breeding season in the black grouse Lyrurus tetrix ArchiMer
Harris, Sarah; Kervinen, Matti; Lebigre, Christophe; Pike, Thomas W.; Soulsbury, Carl D..
Male ornaments function as honest cues of male quality in many species and are subject to intra‐ and intersexual selection. These ornaments are generally studied during peak expression, however their size outside the breeding season may determine ultimate ornament size and costliness, and as such reproductive success. We investigated whether male black grouse Lyrurus tetrix eye comb size was related to age, condition and measures of male dominance before and during the breeding season. Total combined eye comb size began to increase ~70 days before the start of the breeding season. Adult males (aged ≥ 2 years old) had consistently larger eye combs than younger males (1 year old) both before and during the breeding season. Heavier and more dominant adult...
Tipo: Text Palavras-chave: Age; Ornament expression; Dominance.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00440/55121/56577.pdf
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AGE DIFFERENCES AND MACROECONOMIC EFFECTS ON FOOD STAMP PROGRAM PARTICIPATION AgEcon
Lim, So Yeong; Chen, Susan E.; Waldorf, Brigitte S..
Low income populations are more severely affected by economic downturns than their high income counterparts because they are at high risk of unemployment and face reduced earnings in recessions. The use of food stamp benefits and other types of welfare are one mechanism that families can use to buffer the economic shock brought about by income losses due to unemployment during a recession. As a result, during unfavorable economic conditions, low income households disproportionately rely on public assistance including food stamps. What is less understood are the differential effects of macroeconomic conditions on the participation propensities of different population subgroups. Of particular importance are differential effects by age. Depending on their...
Tipo: Working or Discussion Paper Palavras-chave: Food Stamp Program; Age; Macroeconomy; Transition; Agricultural and Food Policy; Food Consumption/Nutrition/Food Safety; I38; J64.
Ano: 2011 URL: http://purl.umn.edu/103783
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AGE DIFFERENCES AND MACROECONOMIC EFFECTS ON FOOD STAMP PROGRAM PARTICIPATION AgEcon
Lim, So Yeong; Chen, Susan E.; Waldorf, Brigitte S..
This study examines Food Stamp Program (FSP) participation patterns with an emphasis on macroeconomic effects and age differences. Entry into and exit out of the program are examined with data from the Survey of Income and Program Participation 2004 panel using probit techniques. The results indicate that young adults easily enter the FSP but quickly move out. Older people are hesitant to enter the FSP but they stay on longer compared to their younger counterparts. The estimation results confirm the common belief that economic dynamics and FSP participation are negatively related. When the unemployment rates rise, the likelihood of entry and continuation on food stamps increases. This study also documents that the macroeconomic effects on FSP transitions...
Tipo: Working or Discussion Paper Palavras-chave: Food stamps; Age; Macroeconomy; Transition; Agricultural and Food Policy; Food Security and Poverty; I38; J64.
Ano: 2011 URL: http://purl.umn.edu/108558
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Age Effect in the Morphological Traits Performance for Sex Determination in Human Skulls and Mandibles International Journal of Morphology
Suazo Galdames,Iván; Zavando,Daniela.
In this study we tested the hypothesis that diagnostic performance of the morphological indicators for sexual dimorphism are reduced as they are applied in skull and mandibles of older subjects. We used 275 adult human skulls, 250 of these with mandible, all subjects with sex and age registry. Sixteen classic morphological indicators of sexual dimorphism were evaluated, this information was compared with the registry and results noted in terms of precision. The best general performance of morphological indicators of sexual dimorphism were recorded in the 31 - 40 and 61 - 70 years, age range groups. Lowest precision ws recorded in the group corresponding to subjects between 21 ­ 30 years. Our results do not support the proposed hypothesis and suggest a...
Tipo: Journal article Palavras-chave: Sexual dimorphism; Sex determination; Aging; Age; Skull.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000100053
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Age et croissance de <Pagrus caeruleostictus> (Valenciennes,1830) des côtes de Nouakchott OceanDocs
Dia, M.; Ghorbel, M.; Kone, Y.; Bouaîn, A..
L’étude de la croissance de Pagrus caeruleostictus des côtes de Nouakchott (Mauritanie) a été réalisée par scalimétrie. L’analyse des variations mensuelles de l’allongement marginal (A.M.) a permis de montrer que la période d’apparition des anneaux d’arrêt de croissance est située en février. Par rétro-calcul, nous avons déterminé la longueur à la fourche (LF) à l’apparition de chaque anneau d’arrêt de croissance en utilisant la relation liant la longueur du poisson au rayon de l’écaille. L’application du modèle de Von Bertalanffy sur ces longueurs, a permis d’obtenir les paramètres de la croissance moyenne en longueur et en masse de l’espèce pour les 2 sexes pris séparément. Ce modèle s’applique bien à la croissance de ce poisson du fait que les valeurs...
Tipo: Journal Contribution Palavras-chave: Scalimétrie; Age; Growth; Growth; Age; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_186.
Ano: 2001 URL: http://hdl.handle.net/1834/3687
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Age et croissance de Pagellus bellottii (Sparidae) des cotes Mauritaniennes OceanDocs
Ould Yarba, L.; Ghorbel, M.; Bouain, A..
The red Pandora Pagellus bellottii is one of the most important demersal species in the fisheries of Mauritanian coasts. Several gears and fleet traditionally exploit it. The studies concerning this fish and particularly those of its age and growth are rare and haven't used the adequate method, which uses hard pieces like scale and vertebra. The objective of the present work is to contribute to the knowledge of the growth parameters of the red Pandora using the scales method not yet used in the studied area. To determine the age and to study the growth of Pagellus bellottii in Mauritanian coasts, we have used the scales of 544 individuals. We have taken, 8 scales under the fin pectoral and we have read the age using a binocular magnifying glass provided...
Tipo: Journal Contribution Palavras-chave: Pagellus bellottii Sparidae; Age; Age determination; Growth; Scale reading; Pagellus bellottii; Sparidae; Http://aims.fao.org/aos/agrovoc/c_43241; Http://aims.fao.org/aos/agrovoc/c_43233.
Ano: 2004 URL: http://hdl.handle.net/1834/4245
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Age et croîssance du chinchard à quelque jaune (trachurus méditerraneus) dans la région nord de la Tunisie OceanDocs
Fezzani Serbaji, S.; Chemmam-A, B.; Ben Salem, M..
Le chinchard à queue jaune est un Carangidae qui fait l’objet d’une exploitation par les différents types de pêche le long des côtes tunisiennes. Dans le présent travail on se propose d’étudier l’âge et la croissance sur la base de la distribution des fréquences de taille dans la région Nord de la Tunisie. La décomposition de ces fréquences de taille est réalisée suivant la méthode de Battacharya (1967). Deux périodes sont considérées, la première correspond à l’année 1998 et la seconde s’étale entre Novembre -1999 et Décembre -2000. Pour la première période, 6 classes d’âges ont pu être identifiées alors que pour la seconde cette valeur est de 7. Les équations de croissance linéaire annuelle suivant le modèle Von Bertalanffy (1938) ont été établies.
Tipo: Journal Contribution Palavras-chave: Trachurus mediterraneus; Age; Age composition; Frequency; Growth; Population structure; Size distribution; Horse mackerel fisheries; Age composition; Growth; Population structure; Age; Http://aims.fao.org/aos/agrovoc/c_29093; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_186.
Ano: 2006 URL: http://hdl.handle.net/1834/4276
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Age, Health, and the Willingness to Pay for Mortality Risk Reductions: A Contingent Valuation Survey in Japan AgEcon
Itaoka, Kenshi; Krupnick, Alan J.; Akai, Makoto; Alberini, Anna; Cropper, Maureen L.; Simon, Nathalie B..
A contingent valuation survey was conducted in Sizuoka, Japan, to estimate the willingness to pay (WTP) for reductions in the risk of dying and calculate the value of statistical life (VSL) for use in environmental policy in Japan. Special attention was devoted to the effects of age and health characteristics on WTP. We find that the VSLs are somewhat lower (103 to 344 million yen) than those found in the virtually identical survey applied in some developed countries. These values were subject to a variety of validity tests, which they generally passed. We find that the WTP for those over age 70 is lower than that for younger adults, but that this effect is eliminated in multiple regression. Rather, when accounting for other covariates, we find that WTP...
Tipo: Working or Discussion Paper Palavras-chave: Willingness to pay; Value of statistical life; Mortality risk; Contingent valuation; Age; Risk and Uncertainty.
Ano: 2005 URL: http://purl.umn.edu/10829
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Age, Health, and the Willingness to Pay for Mortality Risk Reductions: A Contingent Valuation Survey of Ontario Residents AgEcon
Krupnick, Alan J.; Alberini, Anna; Cropper, Maureen L.; Simon, Nathalie B.; O'Brien, Bernie; Goeree, Ron; Heintzelman, Martin.
Much of the justification for environmental rulemaking rests on estimates of the benefits to society of reduced mortality rates. This research aims to fill gaps in the literature that estimates the value of a statistical life (VSL) by designing and implementing a contingent valuation study for persons 40 to 75 years of age, and eliciting WTP for reductions in current and future risks of death. Targeting this age range also allows us to examine the impact of age on WTP and, by asking respondents to complete a detailed health questionnaire, to examine the impact of health status on WTP. This survey was self-administered by computer to 930 persons in Hamilton, Ontario, in 1999. The survey uses audio and visual aids to communicate baseline risks of death and...
Tipo: Working or Discussion Paper Palavras-chave: Mortality risk valuation; Canada; Contingent valuation; Age; Health status; Risk and Uncertainty; I1; Q20; Q26.
Ano: 2000 URL: http://purl.umn.edu/10888
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Age of Jack mackerel Trachrus murphyi (Carangidae) using daily growth rings in sagittae otoliths Gayana
Cisterna,Lilian; Arancibia,Hugo.
ABSTRACT Growth of Jack mackerel (Trachurus murphyi) was estimated using daily growth rings in fish collected in central-south Chile from 2004 to 2011. The von Bertalanffy growth curve at length for both sexes (n=210 individuals) is FLt = 75*[1-e -0.16( t +0.13)] where FLt is fork length (cm) at time t (years).
Tipo: Journal article Palavras-chave: Age; Chile; Daily growth rings; Jack mackerel; Sagittae otoliths; Trachurus murphyi.
Ano: 2017 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382017000100028
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Age-Related Changes in the Expression of ICAM-1 in the Aorta of Wistar Albino Rats International Journal of Morphology
Ketani,Sennur; Karakoç,Zelal; Ketani,M. Aydin; Kilinç,Mehmet.
ICAM-1 which is expressed by endothelial cells and leukocytes are observed as first markers in diseases such as transplant rejection, diabetes and atherosclerosis and in infections caused by various pathogens. In the present study, it is aimed to reveal the age-related changes in the expression of ICAM-1 on rats. Therefore, a total of 30 albino rats were taken at the age of 6, 18 and 24 months without gender discrimination. Rats were fed with standard pellet feed during the study. Afterwards, rats were sacrificed and tissue samples were collected from their rats, and the samples were evaluated under the light microscope by staining with immnunohistochemical method. It was determined that the expression of both aortic endothelial cells and endothelial cells...
Tipo: Journal article Palavras-chave: ICAM-1; Rat; Aortic endothelium; Age.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000400049
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Alocação de biomassa e ajuste de equações para estimativa de biomassa em compartimentos aéreos de Eucalyptus benthamii. Repositório Alice
SILVA, H. D. da.; FERREIRA, C. A.; CORRÊA, R. S.; BELLOTE, A. F. J.; TUSSOLINI, E. L..
Este trabalho tem por objetivo apresentar os resultados do ajuste de modelos para determinação da biomassa seca de compartimentos aéreos e a alocação percentual de biomassa nos compartimentos madeira, casca, folhas e galhos em árvores de Eucalyptus benthamii de 12, 24, 36 e 48 meses de idade e plantios com espaçamento 3 m x 2 m, no município de Guarapuava-PR. Para os compartimentos considerados, o modelo logarítmico generalizado foi de melhor índice de ajuste para a variável galho e, juntamente com o modelo variável, combinada logarítmica, o de menor erro para casca. Com relação aos compartimentos folha e madeira, foi mais adequado o uso do modelo lnY=b 0 +b 1 *lnDAP e variável combinada logarítmica, respectivamente. A alocação de biomassa foi diferenciada...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Eucalyptus benthami; Idade; Modelo; Variável; Age; Model; Variable.
Ano: 2004 URL: http://www.alice.cnptia.embrapa.br/handle/doc/311927
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Analysis of growth curves in different lineages of Caipira broiler type Animal Sciences
Araujo, Caroliny Costa; Rodrigues, Kênia Ferreira; Vaz, Roberta Gomes Marçal Vieira; Conti, Ana Carolina Muller; Amorim, Aline Ferreira; Campos, Carla Fonseca Alves.
The objective of this work was to identify, by means of different statistical criteria the ideal nonlinear regression model to describe the growth curve of three lineages of caipira broiler for meat production. A total of 90 birds were used, being 30 birds from each of the following lineages: Pescoço Pelado, Carijó and Pesadão Vermelho. The individual body weight of broilers (1, 7, 14, 21,28, 35, 42, 49, 56, 63, 70, 77, 84 and 91 days of age) was collected weekly for determination of growth curves by means of Models von Bertalanffy, Gompertz, Logistic, Richards and Brody. The parameters of Brody model did not converge to the weight of strains. The model that better adjusted to the data was Logistic. 
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zootecnia e Produção Animal statistical model; Birds; Weight; Age; Lineage..
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/38806
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Anatomia e dendrometria de Mimosa artemisiana e Eucalyptus grandis. Repositório Alice
PAULA, J.E. de.
A madeira torna-se mais pesada a medida que a arvore envelhece, pois a densidade basica da parte mais interna do tronco, que foi formada quando a arvore era mais nova, e mais baixa, quando comparada com a densidade de parte mais externa. Com este trabalho pretendeu-se conferir a densidade e verificar se a madeira apresentava diferencas anatomica com o aumento da idade, bem como gerar conhecimento biotecnologico seguro que sirva de subsidio ao melhor aproveitamento da madeira, especialmente no que concerne a geracao de energia. O estudo baseou-se em quatro areas da secao circular do tronco, obtidas na altura do DAP (a 1,30 m do solo), orientandas do centro para o alburno. As arvores estudadas tinham 24 anos de idade. A densidade basica de Mimosa artemisiana...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Madeira; Arvore; Tronco; Idade; Biotecnologia; Energia; Wood; Tree; Stem; Age; Biotechnology; Energy.
Ano: 1995 URL: http://www.alice.cnptia.embrapa.br/handle/doc/104237
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Anthropometrical Characteristics and Somatotype of Young Macedonian Soccer Players International Journal of Morphology
Gontarev,Seryozha; Kalac,Ruzdija; Zivkovic,Vujica; Ameti,Vullnet; Redjepi,Agim.
The success in sport performance is closely related to the physical condition of the sportsman. In the assessment of the physical status except physiological and fitness parameters, significant influence have the anthropometric parameters. The aim of the study was dual: to assess the changes in the anthropometric characteristics and the somatotype of young soccer players at different ages and to compare these characteristics with the general population. The analyzed measurements of 486 young soccer players who play in teams of the First national league, with an average age 15.8±1.4. The soccer players were divided into five subgroups, at age difference of 1 year. In the sample height, weight, BMI index, diameters, volumes and skin folds were measured, also...
Tipo: Journal article Palavras-chave: Soccer; Young; Anthropometry; Somatotype; Growth; Age.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000100024
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Are hake otolith macrostructures randomly deposited? Insights from an unsupervised statistical and quantitative approach applied to Mediterranean hake otoliths ArchiMer
Courbin, Nicolas; Fablet, Ronan; Mellon-duval, Capucine; De Pontual, Helene.
Individual fish age data are crucial to fish stock assessment, so their accuracy and precision are vital. The acquisition of age data most often relies on interpreting fish otoliths, a complex task in which expert subjectivity increases with the complexity of the structural patterns of the otoliths. The question arises for certain fish species (e.g. hake, Merluccius merluccius) whether the deposition of otolith macrostructures is meaningful for age estimation. A quantitative method based on the evaluation of otolith similarity in terms of structural patterns is presented to investigate this issue. It relies on the determination of a typology of otolith macrostructures from an unsupervised statistical analysis of the distributions of their characteristics....
Tipo: Text Palavras-chave: Quality control; Otolith; Merluccius merluccius; Growth; Age estimation method; Age.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2678.pdf
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