Consulta: subjectFacets:"Age"
Registros recuperados: 97
Data/hora: 05/06/2024 09:20:08

Género, edad y pobreza como determinantes de vulnerabilidad y adaptación ante desastres: El impacto del huracán Karl en La Antigua, Veracruz.
Provedor de dados: 32
Autores: Sosa Capistrán, Dulce María.
En el presente trabajo se describen las experiencias de dos localidades impactadas por el huracán Karl en septiembre de 2010. El objetivo de la investigación es analizar la respuesta institucional e identificar las condiciones de vulnerabilidad y acciones de respuesta ante el huracán Karl considerando diferencias de género, edad y pobreza entre la población de la localidad de Nicolás Blanco y la colonia de desplazados (as) Huitzilapan del municipio de La Antigua, Veracruz. Se utilizó una metodología mixta. Por medio de entrevistas, talleres y una encuesta se abordaron las preguntas de investigación. Se identificaron las acciones de respuesta al huracán y las que se han desarrollado actualmente; se analizaron las diferentes condiciones de vulnerabilidad de...
Palavras-chave: Huracán; Estrategias; Roles de género; Edad; Reubicación; Hurricane; Strategies; Gender roles; Age; Relocation; Desarrollo Rural; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2240

Rules Compliance and Age: Experimental Evidence with Fishers from the Amazon River
Provedor de dados: 7
Autores: Lopez, Maria Claudia; Department of Community Sustainability, Michigan State University, USA; mclopezperez@gmail.com.
We report the results of common-pool resource economic experiments conducted with indigenous communities in the Colombian Amazon. The experiments recreate two contexts: a limited open access with no institutions regulating the fisheries and a nonmonetary external regulation that limits individual extraction when a fisher is found to be overextracting. We find that variables that did not explain behavior under limited open access do so under the regulatory institution. In particular, when the nonmonetary external regulation was introduced, we found a nonlinear significant effect of age on individual harvest. This result implies a negative relationship between age and individual extraction that reaches a peak around age 54. Our results suggest that in our...
Tipo: Peer-Reviewed Reports
Palavras-chave: Age; Common-pool resources; Field experiments  regulations; Social dilemmas.
Ano: 2013

Age of Jack mackerel Trachrus murphyi (Carangidae) using daily growth rings in sagittae otoliths
Provedor de dados: 72
Autores: 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

Glutathione S-transferase Mu (GSTM1) null genotype in relation to gender, age and smoking status in a healthy Brazilian population
Provedor de dados: 74
Autores: Losi-Guembarovski,Roberta; D’Arce,Luciana Paula Grégio; Cólus,Ilce Mara de Syllos.
The glutathione S-transferase mu (GSTM1) gene which acts during phase II of xenobiotic metabolism is polymorphic in the population, being absent in about 30-50% of individuals depending on the ethnic group from which they come. Epidemiological studies suggest that individuals who are homozygous null at the GSTM1 locus may have an increased risk of developing various types of neoplastic disease. We used the polymerase chain reaction (PCR) to estimate the frequency of GSTM1 in 176 healthy individuals from the north of Paraná (Brazilian state), the null genotype being detected in 48.86% of these individuals. The Student’s t-test was used to evaluate the frequency of the glutathione S-transferase null genotype in relation to age, gender and smoking habit and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glutathione S-transferase Mu (GSTM1); Control individuals; Brazilian population; Age; Smoking habit.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000400001

Морфоструктура бурой водоросли Dilophus fasciola (Roth) Howe в прибрежных фитоценозах района Севастопольской бухты (Черное море)
Provedor de dados: 13
Autores: Танковская, И. Н.; Евстигнеева, И. К.
Описана морфологическая структура слоевища бурой водоросли Dilophus fasciola в зависимости от возраста его отдельных участков и сезона. Установлена степень возрастной и сезонной вариабельности размеров слоевища, клеток и их формы с поверхности и на поперечном срезе пластины. Выделены морфопараметры, отличающиеся достаточной степенью константности (ширина пластины, количество и размеры боковых ветвей, форма всех клеток в основании слоевища, ширина центральных клеток)
Tipo: Journal Contribution
Palavras-chave: Морфоструктура; Дилофус; Возраст; Сезон; Dilophus; Age; Season; Morphological structure Age Seasons Seasons Age http://aims.fao.org/aos/agrovoc/c_6911 http://aims.fao.org/aos/agrovoc/c_186.
Ano: 2002
URL: http://repository.ibss.org.ua/dspace/handle/99011/384

Ртуть в мидиях Mytilus galloprivincialis Lam. из бухт крымского побережья Черного моря
Provedor de dados: 13
Autores: Рябушко, В. И.; Егоров, В. Н.; Козинцев, А. Ф.; Костова, С. К.; Шинкаренко, В. К.
Исследовано содержание ртути в мягких тканях и раковинах мидии Mytilus galloprovincialis Lam. из бухт Крымского побережья Черного моря в зависимости от индивидуального возраста моллюсков. Линейные размеры мидии (L, мм) в зависимости от времени (t, годы) хорошо аппроксимируются экспоненциальной функцией: L = L0 + b lg t, а концентрация ртути (C, мкг/гсух): C = C0 + b1 lg t. Коэффициенты уравнения отражают различия в экологических условиях обитания животных и уровнях загрязнения среды. Индивидуальный возраст двустворчатых моллюсков является хорошим интегральным биомаркером для изучения распределения токсикантов, в частности ртути, в популяциях мидий из различных районов шельфа Черного моря. Зависимость между содержанием ртути в мягких тканях мидий из...
Tipo: Journal Contribution
Palavras-chave: Мидия; Возраст; Ртуть; Черное море; Mussel; Age; Mercury; The Black Sea Age Mercury Age Mercury http://aims.fao.org/aos/agrovoc/c_186 http://aims.fao.org/aos/agrovoc/c_4751.
Ano: 2002
URL: http://repository.ibss.org.ua/dspace/handle/99011/144

Ртуть в мидиях Mytilus galloprivincialis Lam. из бухт крымского побережья Черного моря
Provedor de dados: 13
Autores: Шинкаренко, В. К.; Егоров, В. Н.; Рябушко, В. И.; Козинцев, А. Ф.; Костова, С. К.
Исследовано содержание ртути в мягких тканях и раковинах мидии Mytilus galloprovincialis Lam. из бухт Крымского побережья Черного моря в зависимости от индивидуального возраста моллюсков. Линейные размеры мидии (L, мм) в зависимости от времени (t, годы) хорошо аппроксимируются экспоненциальной функцией: L = L0 + b lg t, а концентрация ртути (C, мкг/гсух): C = C0 + b1 lg t. Коэффициенты уравнения отражают различия в экологических условиях обитания животных и уровнях загрязнения среды. Индивидуальный возраст двустворчатых моллюсков является хорошим интегральным биомаркером для изучения распределения токсикантов, в частности ртути, в популяциях мидий из различных районов шельфа Черного моря. Зависимость между содержанием ртути в мягких тканях мидий из...
Tipo: Journal Contribution
Palavras-chave: Мидия; Возраст; Ртуть; Черное море; Mussel; Age; Mercury; The Black Sea Age Mercury Age Mercury http://aims.fao.org/aos/agrovoc/c_186 http://aims.fao.org/aos/agrovoc/c_4751.
Ano: 2002
URL: http://repository.ibss.org.ua/dspace/handle/99011/144

Размерно-возрастной ключ азово-черноморской хамсы
Provedor de dados: 13
Autores: Мельникова, Е. Б.; Бондарев, В. А.; Мурзин, Ю. Л.; Новосёлова, Ю. В.
The size-age key intended for operative determination of age composition of catches of European anchovy is developed. The key is simple in usage and can be used in the fisheries conditions.
Tipo: Book Section
Palavras-chave: European anchovy; Size distributing; Age; Ke.
Ano: 2010
URL: http://repository.ibss.org.ua/dspace/handle/99011/1858

Skull morphometry and vault sutures of Myrmecophaga tridactyla and Tamandua tetradactyla
Provedor de dados: 76
Autores: Hossotani,Camila M. de S.; Ragusa-Netto,José; Luna,Helder S. e.
ABSTRACT This study aimed to examine the relationship between skull size and the level of cranial vault suture closure. A total of 50 Myrmecophaga tridactyla Linnaeus, 1758 and 178 Tamandua tetradactyla Linnaeus, 1758 skulls were analyzed in relation to 18 skull dimensions. The skulls were grouped into three levels of suture closure: no sutures closed (level 0), one or all the fallowing sutures closed: interfrontalis, sagitalis and coronalis (level 1) and all sutures closed (level 2). The results indicated that among the 18 variables measured, 17 showed significant differences (p ≤ 0.01) between level 0 and level 1 skulls of T. tetradactyla; as well as between level 0 and level 1, and level 0 and level 2 skulls of M. tridactyla. M. tridactyla level 1 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Anteater; Cranial morphology; Xenarthra.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212017000100238

Idade à primeira cria em bubalinos no Trópico Úmido brasileiro.
Provedor de dados: 14
Autores: MARQUES, J. R. F.; BATISTA, H. A. M.; NASCIMENTO, C. N. B. do; LOURENÇO JUNIOR, J. de B.; CARVALHO, L. O. D. de M.; COSTA, N. A. da; ANDRADE, V. J.; PIMENTEL, E. S.
bitstream/item/31935/1/CPATU-BP70.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Bubalino; Mestico; Murrah; Mediterraneo; Campo Experimental Felisberto Camargo; Belem; Pará; Brasil; Buffalo; Management; Breed.; Animal; Criação; Idade; Manejo; Parto; Raça; Reprodução.; Age; Amazonia; Calving; Reproduction.
Ano: 1985
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/380954

Conhecer a idade das árvores: importância e aplicação.
Provedor de dados: 14
Autores: BOTOSSO, P. C.; MATTOS, P. P. de.
bitstream/item/17085/1/doc75.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Anéis de crescimento.; Manejo; Dendrologia; Árvore; Idade.; Age; Growth rings; Trees.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/280995

Influência da idade de plantas de juta na suscetibilidade a Colletotrichum corchorum.
Provedor de dados: 14
Autores: DUARTE, M. de L. R.; ALBUQUERQUE, F. C. de.
bitstream/item/57755/1/CPATU-ComTec48.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Disease; Plant.; Corchorus Capsularis; Fungo; Doença; Idade; Juta; Planta.; Age; Fungi; Jute.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383163

Suivi 2014 des captures d'anguilles pour la DCF : analyse des otolithes
Provedor de dados: 5
Autores: Elleboode, Romain; Oudard, Clemence; Bellamy, Elise; Penil, Caroline; Mahe, Kelig.
Ce rapport synthétise l'analyse des otolithes d'anguilles prélevés en 2014 dans le cadre du suivi des captures de cette espèce inscrite à la DCF (Data Collection Framework règlement CE n°199/2008 du conseil du 25 février 2008). 212 anguilles ont été prélevées de septembre à décembre 2014 dans le lac de Grand Lieu (n=49), la Loire fluviale (n=51), la Dordogne (n=59) et la Garonne (n=53). La relation entre la longueur totale (Lt) et le poids total (W) des anguilles prélevées en 2014 dans toute la France est du type W = 4.10-4.Lt3,41. Ainsi, les anguilles présentent une allométrie majorante (b=3,41) c’est-à-dire que le poids croit plus vite que la longueur. L'institut IFREMER à travers le pôle national de Sclérochronologie à Boulogne-sur-mer a préparé et...
Tipo: Text
Palavras-chave: Anguille; Otolithe; Age; Dordogne; Loire; Garonne; Lac de Grand Lieu.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00310/42082/41385.pdf

Suivi 2011 des captures d'anguilles pour la DCF : analyse des otolithes
Provedor de dados: 5
Autores: Mahe, Kelig; Penil, Caroline; Sevin, Karine.
Ce rapport synthétise l'analyse des otolithes d'anguilles prélevés en 2011 dans le cadre du suivi des captures de cette espèce inscrite à la DCF (Data Collection Framework règlement CE n°199/2008 du conseil du 25 février 2008). 140 anguilles ont été prélevées entre fin juillet et fin octobre 2011 dans la Loire, la Dordogne et la Gironde. La relation entre la longueur totale (Lt) et le poids total (Wt) des anguilles prélevées en 2011 dans toute la France (Loire, Garonne et Dordogne) est du type Wt = 5.10-7.Lt3,21. Ainsi, les anguilles présentent une allométrie majorante (b=3.21) c’est-à-dire que le poids croit plus vite que la longueur. L'institut IFREMER à travers le pôle national de Sclérochronologie à Boulogne-sur-mer a préparé et interprété les...
Tipo: Text
Palavras-chave: Anguille; Otolithe; Age; Dordogne; Garonne; Loire.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00310/42080/41383.pdf

Age and growth of the striped seabream, Lithognathus mormyrus (Actinopterygii: Perciformes: Sparidae), in the central coast of Algeria, Mediterranean Sea
Provedor de dados: 5
Autores: 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

Growth of an Inshore Antarctic ﬁsh, Trematomus newnesi (Nototheniidae), off Adelie Land
Provedor de dados: 5
Autores: Mahe, Kelig; Elleboode, Romain; Loots, Christophe; Koubbi, Philippe.
Dusky rockcod, Trematomus newnesi, is a widely distributed neritic circumpolar Antarctic fish species. We conducted a study on age and growth of Trematomus newnesi in coastal waters of Adélie Land in East Antarctica. A total of 289 specimens were collected in 2003, 2005, 2006 and 2009. They consisted of 122 females, 132 males and 35 immature specimens. Total length (TL) and total weight (W) of these fish ranged from 13.5 to 25 cm and 19.7 to 174 g respectively for females and from 12 to 20.9 cm and from 24.1 to 144.1 g for males. The TL/W relationship was described by the following parameters: a=7.2.10-3 and b=3.127, showing no significant difference between sex (ANCOVA, P&lt;0.05). Fish age was estimated by counting annual growth increments on polished...
Tipo: Text
Palavras-chave: Antarctic fish; Trematomus newnesi; Otoliths; Growth; Age; Adelie land.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00333/44440/44156.pdf

Age, condition and dominance-related sexual ornament size before and during the breeding season in the black grouse     Lyrurus tetrix
Provedor de dados: 5
Autores: 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

Age, growth and mortality of the striped seabream   Lithognathus mormyrus   (Linnaeus, 1758) in the Gulf of Tunis (Central Mediterranean Sea)
Provedor de dados: 5
Autores: Khaldi, Asma; Chater, Ines; Elleboode, Romain; Mahé, Kelig; Chakroun-marzouk, Nadia.
Despite the high commercial value of the striped seabream Lithognathus mormyrus (Linnaeus, 1758) in the Gulf of Tunis, biological data on its age, growth and exploitation rate are lacking. With the aim of estimating growth parameters, 516 individuals, ranging from 6–27.5 cm total length and from 3.5–293.5 g total weight, were collected from the artisanal fishing fleet between February 2014 and July 2016. The somatic growth presented a positive allometry and was described by the equation TW = 6.54 10−3TL3.213. The monthly analysis of the marginal increment of the otoliths revealed that only one annulus was deposited per year. The estimated von Bertalanffy growth parameters were: L∞ = 30.18 cm, k = 0.303 year−1 and t0 = −1.42 years. Total and natural...
Tipo: Text
Palavras-chave: Age; Growth; Gulf of Tunis; Lithognathus mormyrus; Lopt; Mortality; Otolithometry; Sparidae; Weight–length relationship.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00676/78770/80945.pdf

Relationships between age, growth, diet and environmental parameters for anchovy (Engraulis encrasicolus L.) in the Bay of Benisaf (SW Mediterranean, west Algerian coast)
Provedor de dados: 5
Autores: Bacha, Mahmoud; Moali, Aissa; Benmansour, Nasr-eddine; Brylinski, Jean-michel; Mahe, Kelig; Amara, Rachid.
Age, growth and diet of anchovy were studied for the first time from samples collected in the Bay of Benisaf (west Algerian coast) during summer (spawning period) and autumn (recruitment period) 2007. Age structure and growth parameters were determined by otolith (sagitta) analyses. The von Bertalanffy growth function fitted to age-length data showed that most of anchovy growth is achieved during the first year of life, suggesting that this stock is primarily supported by the smallest age groups and has a strong dependence on recruitment. There were no significant differences between males and females, and pooled mean parameters were: L infinity = 15.61 cm, k = 0.75 per year and to, -1.32 years. Whatever the age-class anchovy is strictly zooplanktivorous....
Tipo: Text
Palavras-chave: Engraulidae; Engraulis encrasicolus; MED; West Algeria; Anchovy; Growth; Age; Diet; Ontogenetic.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00011/12212/9046.pdf

Suivi 2015 des captures d'anguilles pour la DCF : analyse des otolithes
Provedor de dados: 5
Autores: Elleboode, Romain; Sorriaux, Marion; Penil, Caroline; Mahe, Kelig.
Ce rapport synthétise l'analyse des otolithes d'anguilles prélevés en 2015 dans le cadre du suivi des captures de cette espèce inscrite à la DCF. 306 anguilles ont été prélevées de mai à octobre 2015 dans l’Adour fluvial (n=104), la Dordogne (n=51), la Garonne (n=50), au lac de Grand Lieu (n=50) et dans la Loire fluviale (n=51). Lors du prélèvement, quelques règles sont à respecter pour optimiser l'utilisation des données: · prélever la paire de sagittae (paires d’otolithes les plus grands et non cassés), · noter de façon précise la date de prélèvement (JJ/MM/AA), · noter de façon précise le lieu de capture et fournir les cartes avec les lieux référencés à l'IFREMER, · identifier le sexe du poisson, · mesurer le poids total, la longueur totale et si...
Tipo: Text
Palavras-chave: Anguille; Otolithe; Age; Adour fluvial; Dordogne; Garonne; Grand Lieu; Loire fluviale.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00371/48183/48298.pdf

Synthèse française des procédures d'estimation d'âge
Provedor de dados: 5
Autores: Mahe, Kelig; Bellail, Robert; Dufour, Jean-louis; Boiron-leroy, Anne; Dimeet, Joel; Duhamel, Erwan; Elleboode, Romain; Felix, Jerome; Grellier, Patrick; Huet, Jerome; Labastie, Jacques; Le Roy, Didier; Lizaud, Oceann; Manten, Marie-line; Martin, Stephane; Metral, Luisa; Nedelec, Daniel; Verin, Yves; Badts, Vincent.
This document presents all the techniques used in routine by Ifremer to estimate the age of fish from the calcified piece. The procedure for estimating age describes each technical stage from the taking of the calcified piece through to the supplying of key sizes/ages to the European work groups. This procedure is specific to each species and even each population of fish.
Tipo: Text
Palavras-chave: Poisson; TNPC; Préparation; Procédure; Age; Ecaille; Illicium; Otolithe; Sclérochronologie; Fish; TNPC; Preparation; Procedure; Age; Scale; Illicium; Otolith; Sclerochronology.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00000/7294/rapport-7294.pdf

Manual of Fish Sclerochronology
Provedor de dados: 5
Autores: Panfili, Jacques; De Pontual, Helene; Troadec, Herve; Wrigh, Peter J.
Sclerochronology, the study of calcified structures to reconstruct the past history of living organisms, is central to fish biology and fisheries management. This manual aims to provide an overview of the current theoretical and practical aspects of sclerochronological studies. By providing information on the nature of calcified structures (otoliths, scales, skeleton), their uses in fish research and methods for preparation and examination, the manual constitutes a comprehensive guide for researchers, technicians and students either new to the field or interested in expanding their range of expertise. The enclosed multimedia version (DVD) is supplemented by videos illustrating the main technical procedures with an alternative navigation mode based on...
Tipo: Text
Palavras-chave: Age; Age determination; Biological aging; Chemistry; Growth; Otolith reading; Otoliths; Scale reading; Scales; Skeleton.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00017/12801/9742.pdf

Biological and ecological factors related to trace element levels in harbour porpoises (Phocoena phocoena) from European waters
Provedor de dados: 5
Autores: Lahaye, V; Bustamante, Paco; Law, J.r; Learmonth, J.a; Santos, M.b.; Boon, J.p.; Rogan, E; Dabin, W; Addink, M.j.; Lopez, A; Zuur, A.f.; Pierce, G.j.; Caurant, Florence.
Selected trace elements (Cd, Cu, Hg, Se, Zn) were measured in the kidneys and the liver of 104 harbour porpoises (Phocoena phocoena) stranded along the coasts of France, Galicia (Spain), Ireland, Scotland (UK), and the Netherlands. Generally, relatively low concentrations of toxic elements were encountered in the tissues of European porpoises, except for two individuals, which displayed high hepatic Hg concentrations. Also, elevated Cd levels obtained in Scottish porpoises could be related to their feeding preferences and this result suggests an increase of the proportion of cephalopods in their diet with latitude. Moreover, significant geographical differences were seen in hepatic Zn concentrations; the elevated Zn concentrations displayed by porpoises...
Tipo: Text
Palavras-chave: Tracers; Multivariate analysis; Diet; Age; Marine mammals; Zinc; Cadmium; Mercury; Heavy metals.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2920.pdf

Age and growth of blackfin tuna (Thunnus atianticus) caught under moored fish aggregating devices, around Martinique Island
Provedor de dados: 5
Autores: 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

Comparing growth in surface and cave morphs of the species Astyanax mexicanus: insights from scales
Provedor de dados: 5
Autores: Simon, Victor; Elleboode, Romain; Mahe, Kelig; Legendre, Laurent; Ornelas-garcia, Patricia; Espinasa, Luis; Retaux, Sylvie.
Background Life in the darkness of caves is accompanied, throughout phyla, by striking phenotypic changes including the loss or severe reduction in eyes and pigmentation. On the other hand, cave animals have undergone constructive changes, thought to be adaptive, to survive in this extreme environment. The present study addresses the question of the evolution of growth in caves, taking advantage of the comparison between the river-dwelling and the cave-dwelling morphs of the Mexican tetra, Astyanax mexicanus. Results A sclerochronology approach was undertaken to document the growth of the species in these two very distinct habitats. Scales from 158 wild Astyanax mexicanus specimens were analyzed from three caves (Pachón, Tinaja and Subterráneo) and two...
Tipo: Text
Palavras-chave: Cave; Fish; Size; Age; Scales; Growth; Food; Comparative biology; Life history traits.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00412/52337/53124.pdf

Frequency demodulation on otolith numerical images for the automation of fish age estimation
Provedor de dados: 5
Autores: Troadec, Herve.
A method to assist the reading of calcified structures with digital images is proposed. An a priori growth pattern is introduced in the image processing to take into account both the variability of the ring size and the non-linearity of their growth. The introduction of biological knowledge is performed within a demodulation processing using the reciprocal growth function. The ring number is estimated by spectral analysis. The constraints introduced by the growth model are weak since they are restricted to the definition of L0, in the case of an exponential model, or of L∞ in the case of a Von Bertalanffy model. When applied to larval Dover sole otoliths (Solea solea) results close to the expert's are obtained. In the case of saithe otoliths (Pollachius...
Tipo: Text
Palavras-chave: Otolithe; Image numérique; Âge; Croissance; Solea solea / Pollachius virens; Otolith; Digital image; Age; Growth; Solea solea / Pollachius virens.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00189/30072/28560.pdf

Effects of age and environment on survival of summer mortality by two selected groups of the Pacific oyster Crassostrea gigas
Provedor de dados: 5
Autores: Degremont, Lionel; Boudry, Pierre; Ropert, Michel; Samain, Jean-francois; Bedier, Edouard; Soletchnik, Patrick.
This study investigated the effects of age (first or second summer of life) and environment (three study sites on French coasts) on summer mortality in Crassostrea gigas, using three generations of oysters produced during the Morest project. For each generation, two groups of oysters, selected either as 'resistant' (R) or 'susceptible' (S) to summer mortality at the age of 6 months in Rivière d'Auray (RA, South Brittany), were evaluated. In Ronce (Marennes-Oléron Bay) and RA, R oysters had low mortality during their first and second summers, while mortality was higher during the second summer in Baie des Veys (BDV, Normandy). In RA, S oysters exhibited higher mortality during their first summer than during their second, while the opposite result was found...
Tipo: Text
Palavras-chave: Summer mortality; Age; Environment; Genetic; Crassostrea gigas.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/2009/publication-6972.pdf

Evidence of underestimation of European hake growth in the Bay of Biscay, and its relationship with bias in the agreed method of age estimation
Provedor de dados: 5
Autores: De Pontual, Helene; Groison, Anne-laure; Pineiro, Carmen; Bertignac, Michel.
In 2002, a pilot experiment on hake tagging was carried out using methodology specifically developed to catch and handle fish in,good condition. By the end of 2005, 36 hake and five tags had been returned to the laboratory (a 3.1% return rate) with a maximum time at liberty of 1066 days. The somatic growth of the recoveries proved to be twofold higher than that expected from published von Bertalanffy growth functions for the species in the Bay of Biscay. The growth underestimation was related to age overestimation, as demonstrated by two independent analyses. The first was based on a blind interpretation of marked otoliths conducted independently by two European experts involved in the routine age estimation of hake. The result shows that the age estimates...
Tipo: Text
Palavras-chave: Tagging; Otolith; Merluccius merluccius; Growth; European hake; Age validation; Age estimation method; Age.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2221.pdf

Identification of skipjack tuna juveniles based on DNA control region sequences and potential spawning area around reunion island
Provedor de dados: 5
Autores: Nikolic, Natacha; Jerome, Marc; Fonteneau, Alain; Evano, Hugues; Verrez-bagnis, Veronique.
In this study, we confirmed that DNA control region can be used to identify potential spawning area from pelagic juveniles species. We used the mitochondrial DNA control region to identify tuna juveniles predated by common dolphinfish and sampled in surface waters around Reunion Island. These were skipjack juveniles at an early stage (small length and young age). The biological results confirmed the species identification based on DNA analysis. Catch data by longline reveal a higher number of skipjack from October to December around Reunion Island corresponding to the period of our skipjack juvenile sampling
Tipo: Text
Palavras-chave: Skipjack tuna; Reunion island; DNA; Age; Juvenile.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00299/40993/42657.pdf

Etude du vieillissement de composites verre resine en milieu marin
Provedor de dados: 5
Autores: Gutierrez, J; Lelay, F; Hoarau, P.
Evolution of glass fibre-resin composites (polyester, epoxy and vinylester) after 30 years in a marine environment has been anticipated by the compilation of the Naval Construction Direction test results. This study showed that 120 degree C epoxy prepreg, in spite of improved initial performance, was more affected by water environment aging than other composites. Post-curing of epoxy and vinylester composites does not significantly improve resistance to water degradation except in the case of high temperature aging (60-70 degree C).
Tipo: Text
Palavras-chave: Ship technology; Age; Aging; Composite materials; Fibre glass; Vieillissement accéléré; Vieillissement naturel; Composite verre résine.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1056.pdf

Influence de la densite et de l'age des huitres japonaises (Crassostrea gigas ) sur la croissance et la composition biochimique en bassins de terre
Provedor de dados: 5
Autores: Bodoy, A; Geiaron, P; Garnier, Jacqueline; Heurtebise, S.
Two different biomasses (100 g multiplied by m super(-2) and 1 kg multiplied by m super(-2)) of oysters were put in identical sea-water ponds, thus leading to different trophic conditions, corresponding to rearing techniques. Changes in growth, biochemical composition and sexual maturation were recorded for two age groups. The first one included 9 month-old oysters and the second one 21 month-old oysters, at the beginning of the experiment. For both age groups, significant differences were observed in growth and biochemical composition. Lipids were accumulated faster for the lower biomass. However, the only difference concerning glycogen was observed on the older oysters. They showed a peak at the lowest biomass and a decrease at the larger biomass. Sexual...
Tipo: Text
Palavras-chave: Crassostrea gigas; Bivalvia; Sea water; Oyster culture; Glycogen; Age; Chemical composition; Lipids; Biochemistry; Sexual maturity; Rearing; Pond culture; Biomass; Growth; Density.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-916.pdf

Estimation de l’âge du merlan (Merlangius merlangus) ?
Provedor de dados: 5
Autores: Dufour, Jean-louis; Chantre, Celina; Elleboode, Romain; Mahe, Kelig.
Le merlan (merlangius merlangus) est une espèce commerciale importante suivie au niveau européen. La pièce calcifiée utilisée pour l’estimation de l’âge du merlan est l'otolithe. Parmi les 3 paires d'otolithes, ce sont toujours les plus gros, les sagittae qui sont utilisés. Ils conservent la séquence complète des marques de croissance enregistrées (Panfili et al., 2002). Pour observer au mieux ces structures, la technique de coupe transversale a été retenue comme la plus précise (ICES WKARWHG2 REPORT 2016). Les images obtenues sont soumises à l’interprétation par les experts européens. Ce rapport propose de décrire précisément les structures observables sur les images obtenues par la technique de coupe transversale. La variabilité des structures est...
Tipo: Text
Palavras-chave: Merlan; Otolithe; Age; Radiale; Analyse d’images; Croissance.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00627/73941/73376.pdf

Suivi 2013 des captures d'anguilles pour la DCF : analyse des otolithes
Provedor de dados: 5
Autores: Bellamy, Elise; Sevin, Karine; Penil, Caroline; Mahe, Kelig.
Ce rapport synthétise l'analyse des otolithes d'anguilles prélevés en 2013 dans le cadre du suivi des captures de cette espèce inscrite à la DCF (Data Collection Framework règlement CE n°199/2008 du conseil du 25 février 2008). 240 anguilles ont été prélevées en septembre/octobre 2013 dans le lac de Grand Lieu, la Dordogne et la Garonne. La relation entre la longueur totale (Lt) et le poids total (W) des anguilles prélevées en 2013 dans toute la France est du type W = 3.10-7.Lt3,273. Ainsi, les anguilles présentent une allométrie majorante (b=3,273) c’est-à-dire que le poids croit plus vite que la longueur. L'institut IFREMER à travers le pôle national de Sclérochronologie à Boulogne-sur-mer a préparé et interprété les otolithes, pièces calcifiées de...
Tipo: Text
Palavras-chave: Anguille; Otolithe; Age; Dordogne; Garonne; Lac de Grand Lieu.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00310/42081/41384.pdf

Size and genotype affect resistance to mortality caused by OsHV-1 in Crassostrea gigas
Provedor de dados: 5
Autores: Degremont, Lionel.
As with summer mortalities reported in France between 2001 and 2006, mortality caused by the Ostreid herpesvirus 1 (OsHV-1) in Crassostrea gigas affects mostly juveniles, although adults can also be impacted to a small extent. This could suggest that both mortalities have similar causes and that establishment of resistance, in particular to the Ostreid herpesvirus 1 (OsHV-1), depends on either the size or the age of oysters. The present study reports an investigation of both size and age using three cohorts produced during winter and three produced during summer. Each cohort contained oysters genetically selected to be resistant or susceptible to the summer mortality phenomenon, as well as unselected control oysters. Any abnormal mortality was recorded...
Tipo: Text
Palavras-chave: Mortality; Crassostrea gigas; Disease resistance; Size; Age; Ostreid herpesvirus.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00157/26799/24909.pdf

Are hake otolith macrostructures randomly deposited? Insights from an unsupervised statistical and quantitative approach applied to Mediterranean hake otoliths
Provedor de dados: 5
Autores: 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

Age, growth and mortality of the starry weever Trachinus radiatus Cuvier, 1829 in the Tunisian waters
Provedor de dados: 5
Autores: Hamed, Oussama; Dufour, Jean-louis; Chakroun-marzouk, Nadia; Mahe, Kelig.
Age, growth and mortality of the Starry weever Trachinus radiatus were studied for the first time from 214 individuals collected in the Gulf of Tunis between February 2014 and January 2016. The significant relationship between length-weight was observed for males (a = 0.011, b = 2.992, R2 = 0.981, n = 77) and females (a = 0.010, b = 3.036, R² =0.957, n = 109). Age was estimated by the observation of otoliths transverse thin sections. Age of individuals ranged from 1 to 15 years. The precision was measured by two age estimations from two experts and indicated a good agreement between them (PA = 85.6%, CV = 3.8% and IAPE = 4.1%). The growth parameters of the von Bertalanffy model were TL∞ = 38.41 cm, W∞ = 507.47 g, K = 0.3396 year-1, t0 = 0 year for males...
Tipo: Text
Palavras-chave: Growth; Age; Mortality; Trachinus radiatus; Starry weever; Gulf of Tunis; South-Central Mediterranean Sea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00477/58905/61467.pdf

Age Effect in the Morphological Traits Performance for Sex Determination in Human Skulls and Mandibles
Provedor de dados: 77
Autores: 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

Age-Related Changes in the Expression of ICAM-1 in the Aorta of Wistar Albino Rats
Provedor de dados: 77
Autores: 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

The Morphometry of the Angle of Mandible and its Correlation with Age and Sex in the eThekwini Metropolitan Region: A Panoramic Study
Provedor de dados: 77
Autores: Pillay,S; Ishwarkumar,S; De Gama,B.Z; Pillay,P.
The angle of mandible is formed by the tangent line joining the posterior margin of the ramus and the base of the mandible. The angle of mandible has population-specific characteristics therefore; it is imperative to the field of forensic anthropology for age and sex determination. Literary reports regarding the use of the angle of mandible for age and sex determination vary, as some studies support it, while other studies have documented inefficiencies. Therefore, the aim of this investigation was to document the morphometry of the angle of mandible and to determine if a correlation between the angle of mandible, age and sex exists. Sixty four digital panoramic radiographs (n=128) of individuals between 16-30 years were morphometrically analysed using the...
Tipo: Journal article
Palavras-chave: Angle of mandible; Age; Sex; Mandible; Morphometry.
Ano: 2017
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000200045

Anthropometrical Characteristics and Somatotype of Young Macedonian Soccer Players
Provedor de dados: 77
Autores: 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

Relationship of the Parietal Foramen and Complexity of the Human Sagittal Suture
Provedor de dados: 77
Autores: Mann,Robert W; Manabe,Jiro; Byrd,John E.
The purpose of this paper is to report on the relationship between the parietal foramen and complexity of the human sagittal suture. Examination of 110 Japanese human skulls (males=67, females=43) with at least one parietal foramen revealed that the sagittal suture in the area of the Obelion was the simplest portion (i.e., fewest interdigitations and shortest length) of the suture (paired t-test, P&lt;0.0005), when compared to the outstretched suture length of three established sections: 1. Parietal foramen section (P); 2. Anterior to section P (B); and 3. Posterior to section P (L). Sutural complexity was also compared between individuals with unilateral foramen (n=48) and bilateral foramina (n=62) to see if there was a statistically significant...
Tipo: Journal article
Palavras-chave: Sagittal suture; Complexity; Parietal foramen; Age.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000200040

Population structure, growth and fishery yield of Leporinus acutidens (Valenciennes, 1837) (Teleostei: Anostomidae) in Yacyretá Reservoir (Argentina)
Provedor de dados: 83
Autores: Araya,Patricia R.; Agostinho,Angelo A.; Bechara,José A.
The population structure and dynamics of Leporinus acutidens (Valenciennes, 1837), upstream from Yacyretá Dam (Upper Paraná River, Argentina) were analyzed for their relation to age, condition factor, growth, mortality and fishery yield. The pre- (1990-94) and post- (1995-98) filling phases of the reservoir were compared with regard to age structure, condition factor, and the length/weight relationship of fish. Fish sampling was carried out at four sampling sites following a longitudinal gradient along the river. The catches took place monthly using eight monofilament gillnets (mesh 40 to 160 mm). The growth marks on the scales were annual (9-year maximum). The study of the variation in the monthly averages of the scale marginal increments revealed that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Mortality; Dam; Paraná River.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000100007

Life-history characteristics of Pseudoplatystoma metaense (Teleostei: Siluriformes: Pimelodidae) from the northwestern Orinoco River Basin
Provedor de dados: 83
Autores: Pérez,Alfredo; Fabré,Nidia Noemí.
ABSTRACT The tiger shovelnose catfish (Pseudoplatystoma metaense) identified in literature prior to 2007 as P. tigrinum is the most important catfish species in the Orinoco River fishery, because of its abundance and high market price. The aim of this study was to obtain age, growth and population parameters of the of tiger shovelnose catfish. A total of 2,183 catfish, were sampled during 1996-2003 from the commercial fishery of the northwestern Orinoco River Basin in Venezuela, and were aged by examination of otoliths. Validation of otolith annuli was achieved with marginal increment analysis. Results suggest that, the opaque and translucent zones of otoliths were formed once per year. Length-weight relation and the von Bertalanffy growth model parameters...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Growth; Otoliths; Overfishing; Venezuela.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000100209

Individual, spatial and inter-sex variation in somatic growth: a study of Piaractus mesopotamicus (Characiformes: Serrasalmidae), a long-distance freshwater Neotropical migratory fish
Provedor de dados: 83
Autores: Lourenço,Luzia da S.; Costa,Rosa Maria R. da; Rondon,Patrícia L.; Mateus,Lúcia A. F.
ABSTRACT Growth is a fundamental biological process, driven by multiple endogenous (intra-individual) and exogenous (environmental) factors that maintain individual fitness and population stability. The current study aims to assess whether individual, spatial (headwaters and floodplains) and inter-sex variation occurs in the growth of Piaractus mesopotamicus in the Cuiabá River basin. Samples were collected monthly from July 2006 to July 2007, at two areas in the Cuiabá River basin (headwaters and floodplain). Three growth models (individuals; individuals and sex factors; individuals and areas factors) were developed and compared the fish growth parameters using Akaike information criterion (AIC). The best fit to the length-at-age data was obtained by a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Growth models; Inter-sex variation; Otoliths; Von Bertalanffy.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000200214

Growth of the Cichla temensis Humboldt, 1821 (Perciformes: Cichlidae) from the middle rio Negro, Amazonas, Brazil
Provedor de dados: 83
Autores: Campos,Caroline Pereira; Freitas,Carlos Edwar de Carvalho; Amadio,Sidineia.
This study aimed to estimate age and growth of the peacock bass Cichla temensis from the rio Negro (Brazilian Amazonia) by analyzing scale annuli. Specimens were captured between October 2011 and September 2012 in the main channel of the river and in adjacent lakes in the municipality of Barcelos, AM, Brazil. Six growth checks were identified on the scales of specimens. The annual variation in body condition observed suggests that fat is accumulated during the dry season. Results for the GSI (gonadosomatic index) showed that peak reproduction occurred in the receding-water period, indicating that the fish had energy deficiencies as a result of reproductive activity. RMI (relative marginal increment) analysis revealed that an annulus is formed once a year...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Hydrological period; Peacock bass; Population parameters; Scales.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000200413

Estudio de edad y crecimiento de la raya hocicuda Dipturus chilensis (Guichenot,1848) en el Atlántico Sudoccidental (34º -55º LS y 52º -69º LW)
Provedor de dados: 20
Autores: Zavatteri, A.
This paper deals with the age and growth parameters of the Southwest Atlantic beaked skate Dipturus chilensis, as well as with some reproductive features of the species. Samples of individuals inhabiting 34°-55°S and 52°- 69°W were analyzed. They were taken during surveys carried out by the National Institute for Fisheries Research and Development (INIDEP) research vessels, as well as by a landing sampling at Mar del Plata port. The fish age was determined by counting growth rings from thin sections of the vertebral centra of 414 fish ranging 24-110 cm (203 males) and 24-115 cm (211 females) total length. The vertebral sections were stained using cobalt  hloride. Both average per cent error (APE=5.94) and precision (D=5.89) indexes suggested that the...
Tipo: Theses and Dissertations
Palavras-chave: Age; Age determination; Growth; Length-weight relationships; Sexual maturity; Age determination; Growth; Age; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_186; Http://aims.fao.org/aos/agrovoc/c_7016.
Ano: 2010
URL: http://hdl.handle.net/1834/3585

Etude de l'age et de la croissance de deux especes de Dentes (Dentex dentex et de Dentex maroccanus) des cotes tunisiennes
Provedor de dados: 20
Autores: Chammam-Abdelkader. B.; Kraiem. M.M.; El Abed. A.
The survey of age and growth of two Dentex species (Dentex dentex and Dentex maroccanus) from the Tunisian coasts shows a difference of the growth rate between the two species with a faster growth for Dentex dentex. Any difference of growth has been noticed within the same species. However females present superior maximal sizes comparing to the males for the two species. Concerning the weight growth, the males of Dentex dentex seemed heavier than the females, whereas for Dentex maroccanus the females show a weight growth superior to that of the males.Original Abstract: L'etude de l'age et de la croissance de deux especes de Dentes (Dentex dentex et Dentex maroccanus) des cotes tunisiennes nous a permis de degager une difference du taux de croissance entre...
Tipo: Journal Contribution
Palavras-chave: Dentex  Dentex dentex  Dentex maroccanus; Age; Comparative studies; Growth; Dentex; Dentex dentex; Dentex maroccanus; Http://aims.fao.org/aos/agrovoc/c_10333; Http://aims.fao.org/aos/agrovoc/c_43266; Http://aims.fao.org/aos/agrovoc/c_43269.
Ano: 2004
URL: http://hdl.handle.net/1834/4243

Ecología y conservación de los grandes tiburones costeros de Bahía Anegada, provincia de Buenos Aires, Argentina.
Provedor de dados: 20
Autores: Lucifora, L.O.
Reproduction, age, growth, feeding habits and population dynamics of four large temperate sharks (sand tiger shark Carcharias taurus, school shark Galeorhinus galeus, copper shark Carcharhinus brachyurus, and broadnose sevengill shark Notorynchus cepedianus) were studied in Anegada Bay (between 39°50' and 40°40'S), Argentina. Data were gathered from 1089 individuals examined during a three-year study period. Age and growth were studied through examination of vertebral centra only in the first three species. Population dynamics was modeled through stage matrix population models. Most sand tiger sharks examined were adults and evidence indicates that they use the study area as a mating ground. Sand tiger males mature at 193 and females at 223 cm total length...
Tipo: Theses and Dissertations
Palavras-chave: Reproductive behaviour; Feeding behaviour; Age; Growth; Exploitation; Shark fisheries; Reproductive behaviour; Feeding behaviour; Growth; Age; Http://aims.fao.org/aos/agrovoc/c_37902; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_186.
Ano: 2003
URL: http://hdl.handle.net/1834/1441

Age et croîssance du chinchard à quelque jaune (trachurus méditerraneus) dans la région nord de la Tunisie
Provedor de dados: 20
Autores: 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

Estudios sobre la edad y crecimiento de la Palma Calamus brachysomus (Lockington) (Pisces: Sparidae) en aguas ecuatorianas
Provedor de dados: 20
Autores: Martínez, J.
342 specimens of sparid Calamus brachysomus ”Palma”, collected during a demersal trawl survey by the R. V. Tohallí in April and May1983, were examined. The different techniques used to prepare scales and otoliths for ageing are described and analysed. The otoliths were determined to be the most reliable for ageing studies; 87% of otoliths were readable. The rings observed were assumed to be annual. The mean lengths at age were used to determine the parameters of the Von Bertalanffy growth formula, giving: Lt=50.13(1-e-0.1473(t+2.0704)). The growth curve obtained must be considered provisional due to possible biases in the interpretation of the otoliths, and also due to those arising from the selectivity of the fishing gear.
Tipo: Journal Contribution
Palavras-chave: Demersal fisheries; Age; Growth; Growth curves; Otoliths; Otolith reading; Demersal fisheries; Growth; Otoliths; Age; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_27091; Http://aims.fao.org/aos/agrovoc/c_186.
Ano: 1985
URL: http://hdl.handle.net/1834/3226

Age et croissance de &lt;Pagrus caeruleostictus&gt; (Valenciennes,1830) des côtes de Nouakchott
Provedor de dados: 20
Autores: 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

Dinámica de la metapoblación de almeja panopea Panopea abbreviata en los golfos norpatagónicos
Provedor de dados: 20
Autores: Zaidman, P.C.
Panopea abbreviata es el molusco bivalvo infaunal de mayor tamaño del Mar Argentino. Se distribuye desde Río de Janeiro (Brasil) hasta la Patagonia Argentina. En los golfos San Matías (GSM) y San José (GSJ), conforma una metapoblación que presenta una distribución discontinua, formada por una serie de poblaciones ubicadas a lo largo de las costas.Es el bivalvo más longevo explotado en el Atlántico Sur. En el GSM su pesquería comenzó en el año 2000 y, si bien la misma es incipiente, debido a las características biológico-poblacionales de P. abbreviata es un recurso que requiere de un manejo precautorio. Excepto por estudios preliminares sobre el crecimiento y el ciclo reproductivo, no se contaba con la información básica para manejo. El objetivo general del...
Tipo: Theses and Dissertations
Palavras-chave: Fishery biology; Marine molluscs; Population dynamics; Sustainable management; Age; Growth; Mortality rate; Recruitment; Population structure; Spatial variations; Sex composition; Reproductive cycle; Histology; Environmental conditions.
Ano: 2013
URL: http://hdl.handle.net/1834/5236

Etude préliminaire de l'âge et de la croissance de l'espadon &lt;Xiphias gladius&gt; des eaux tunisiennes.
Provedor de dados: 20
Autores: Hattour, A.; Gaamour, A.; Ben Smida, M.A.
Une clé préliminaire âge taille et âge poids est présentée à partir d’un échantillonnage mené sur 212 espadon (Xiphias gladius L.) pêchés le long des côtes tunisiennes entre mars et septembre 2004. les tailles des poissons sont rangées de 60 cm à 173 cm, correspondant à des poids variant de 1,5 kg à 55 kg. L’analyse des coupes de la 2ème épine de la nageoire anale des espadons échantillonnés ont révélé que les âges sont rangés entre 0 et 5 années.
Tipo: Journal Contribution
Palavras-chave: Tuna fisheries; Age; Composition; Weight; Growth; Cosmopolite species; Population structure; Size distribution; Growth; Population structure; Age; Weight; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_186; Http://aims.fao.org/aos/agrovoc/c_8349.
Ano: 2005
URL: http://hdl.handle.net/1834/1535

Evaluación de la pescadilla de red (Cynoscion striatus) en la Zona Común de Pesca argentino-uruguaya, en el otoño de 1989
Provedor de dados: 20
Autores: Cioffi, C.A.
Tipo: Theses and Dissertations
Palavras-chave: Population structure; Biomass; Size distribution; Age; Fishery surveys; Population structure; Biomass; Age; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_186.
Ano: 1992
URL: http://hdl.handle.net/1834/3554

Age et croissance de Pagellus bellottii (Sparidae) des cotes Mauritaniennes
Provedor de dados: 20
Autores: 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

A preliminary investigation of age and growth of Otolithes ruber from KwaZulu-Natal, South Africa
Provedor de dados: 20
Autores: 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

Edad, crecimiento y mortalidad de Lutjanus purpureus Poey, 1867 (Pisces: Lutjanidae) de la region de Guyanas
Provedor de dados: 20
Autores: González, L.W.; Eslava, N.; Silva, C,.
Se determinó la edad y se estimaron los parámetros de crecimiento y mortalidad del pargo colorado, Lutjanus purpureus Poey, 1867 con base en la lectura de 152 urohiales de 1561 individuos capturados durante 1988 de la región de Guayanas, comprendida entre los 06º - 10º LN y 54º - 61º LW, mediante la pesca exploratoria del B/I "Dr. Fridtjof Nansen". El recuento de zonas anuales en urohiales permitió establecer siete grupos de edad. La curva teórica de crecimiento en longitud se ajustó de acuerdo con los valores de los parámetros de crecimiento de von Bertalanffy : L∞ = 91.99 cm; K = 0.245 por año; to = -0.499 año. La mortalidad natural obtenida a través de la ecuación de Taylor fue igual a 0.255 por año y la mortalidad total calculada mediante el método de...
Tipo: Journal Contribution
Palavras-chave: Age; Growth; Mortality; Fish; Growth; Fish; Age; Mortality; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_15903; Http://aims.fao.org/aos/agrovoc/c_186; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1998
URL: http://hdl.handle.net/1834/3269

¿Existen variaciones interanuales en el crecimiento larval de anchoíta bonaerense (Engraulis anchoita)?
Provedor de dados: 20
Autores: Barretto, A.C.; Chandler, D.E.; Gómez, M.I.
Se determinaron las tasas de crecimiento de larvas de la anchoíta argentina (Engraulis anchoíta) provenientes de la plataforma bonaerense, contando y midiendo incrementos diarios en sus otolitos sagitta. Las larvas se capturaron en diferentes años y durante diferentes épocas (otoño de 1999; invierno de 2000 y primavera de 2002, 2003 y 2004)a los fines de analizar diferencias interanuales en el crecimiento. Se observó que tanto el crecimiento de las larvas como el del otolito estaban acoplados. Las tasas de crecimiento se calcularon en forma individual (para cada larva) o a partir de modelos largo-edad. Dichos valores no resultaron significativamente distintos entre las primaveras y promediaron 0.44 mm/día. Tampoco hubo diferencias entre las temperaturas...
Tipo: Theses and Dissertations
Palavras-chave: Age; Growth; Hydrography; Annual variations; Fish larvae; Growth; Age; Hydrography; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_186; Http://aims.fao.org/aos/agrovoc/c_3727; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 2005
URL: http://hdl.handle.net/1834/2605

Equations for estimating biomass of aereal compartementes of Eucalyptus benthamii
Provedor de dados: 190
Autores: Silva, Helton Damin da; Ferreira, Carlos Alberto; Corrêa, Robson Schaff; Bellote, Antonio Francisco Jurado; Tussolini, Elson Luiz.
This paper presents the results of the adjustment of equations for estimating biomass of aerial compartments of Eucalyptus benthamii trees. The percentile allocation of biomass, in the compartments wood, bark, leaves and branches is also presented. The trees of Eucalyptus benthamii were sampled from stands of 12, 24, 36 and 48 months of age, planted at the spacing 3 m x 2 m, in the region of Guarapuava-PR. For the compartments considered, the generalized logarithmic model gave better indices of adjustment for branches and, together with logarithmic combined variable, the minor error for bark variable. Leaves and wood had minor error with model lnY=b0 +b1*lnDBH and logarithmic combined variable, respectively. The allocation of biomass in the different...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Model; Variable Idade; Modelos; Variável.
Ano: 2004
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1588

Differences in Preferences Towards the Environment: The Impact of a Gender, Age and Parental Effect
Provedor de dados: 31
Autores: Torgler,   Benno; Valinas,   Maria A. Garcia; Macintyre,   Alison.
The paper investigates empirically the differences in preferences towards protection of the environment. Using seven different dependent variables to focus on the impact of age, gender and children we use a large micro data set covering data from 33 Western and Eastern European countries. The results indicate that women have both a stronger preference towards the environment and a stronger willingness to contribute. Moreover, we observe the tendency of a negative correlation between age and environmental preferences. However, a positive effect is visible once we focus on the impact of age on social norms (environmental morale). Finally, we were not able to observe that having children is positively correlated with a stronger preference towards the...
Tipo: Conference Paper or Presentation
Palavras-chave: Environmental Preferences; Environmental Morale; Gender; Age; Children; H260; H730; D640.
Ano: 2008
URL: http://purl.umn.edu/6371

Age, Health, and the Willingness to Pay for Mortality Risk Reductions: A Contingent Valuation Survey of Ontario Residents
Provedor de dados: 31
Autores: 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

THE ROLE OF ECONOMICS IN EATING CHOICES AND WEIGHT OUTCOMES
Provedor de dados: 31
Autores: Mancino,   Lisa; Lin,   Biing-Hwan; Ballenger,   Nicole.
We use data from the USDA's 1994-96 Continuing Survey of Food Intakes by Individuals and the 1994-96 Diet and Health Knowledge Survey to ascertain whether economic factors help explain weight differences among adults. Weight differs among demographic subgroups, and differences in specific behaviors, health awareness, and eating patterns can be linked to weight outcomes. An economic framework helps explain how socioeconomic factors affect an individual's ability to achieve good health. Our results suggest that income, household composition, and formal education help explain variation in behaviors and attitudes that are significantly associated with weight outcomes.
Tipo: Report
Palavras-chave: Obesity; CSFII; DHKS; Weight; Age; Income; Education; Race/ethnicity; Food Consumption/Nutrition/Food Safety; Health Economics and Policy.
Ano: 2003
URL: http://purl.umn.edu/33781

The Impact of Age on the Ability to Perform under Pressure: Golfers on the PGA Tour
Provedor de dados: 31
Autores: Fried,   Harold O.; Tauer,   Loren W.
This paper is about aging and the ability to perform under pressure on the PGA tour. Performance increases with golfing skill, but may first increase and then decrease with age as experience interacts with changes in physical condition. Similarly, mental fortitude or the ability of a golfer to perform under pressure may first increase and then decrease with age as experience interacts with changes in the ability to concentrate. Net performance on the tour is the result of both physical golfing skill and the ability to perform under pressure. We control for changes in physical skill and focus on the mental side of the game. The role of experience suggests an inverted U shaped relationship between age and mental performance that could vary significantly...
Tipo: Working or Discussion Paper
Palavras-chave: Age; Efficiency; Order-m FDH; Golf; Performance under pressure; Productivity Analysis.
Ano: 2009
URL: http://purl.umn.edu/51103

AGE DIFFERENCES AND MACROECONOMIC EFFECTS ON FOOD STAMP PROGRAM PARTICIPATION
Provedor de dados: 31
Autores: 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

AGE DIFFERENCES AND MACROECONOMIC EFFECTS ON FOOD STAMP PROGRAM PARTICIPATION
Provedor de dados: 31
Autores: 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

Does the Value of a Statistical Life Vary with Age and Health Status? Evidence from the United States and Canada
Provedor de dados: 31
Autores: Alberini,   Anna; Cropper,   Maureen L.; Krupnick,   Alan J.; Simon,   Nathalie B.
Much of the justification for environmental rulemaking rests on estimates of the benefits to society of reduced mortality rates. Yet the literature providing estimates of the willingness to pay (WTP) for mortality risk reductions measures the value that healthy, prime-aged adults place on reducing their risk of dying, whereas the majority of statistical lives saved by environmental programs, according to epidemiological studies, appear to be the lives of older people and people with chronically impaired health. This paper provides an empirical assessment of the effects of age and baseline health on WTP for mortality risk reductions by reporting the results of two contingent valuation surveys designed to test the above hypotheses. One survey was...
Tipo: Working or Discussion Paper
Palavras-chave: Willingness to pay; Mortality; Contingent valuation; Age; Health status; Health Economics and Policy; D61; D62; Q20; Q26.
Ano: 2002
URL: http://purl.umn.edu/10769

Age, Health, and the Willingness to Pay for Mortality Risk Reductions: A Contingent Valuation Survey in Japan
Provedor de dados: 31
Autores: 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

Effect of dietary fiber, genetic strain and age on the digestive metabolism of broiler chickens
Provedor de dados: 89
Autores: Krás,RV; Kessler,A de M; Ribeiro,AML; Henn,JD; Bockor,L; Sbrissia,AF.
In this study, 360 male broilers, out of which 240 of a fast-growing strain (Cobb500), and 120 of a slow-growing strain (Label Rouge), were used to evaluate the effect of dietary fiber on digesta transit time and digestive metabolism during the period of 1 to 42 days of age. A completely randomized experimental design with a 3x2 factorial arrangement was applied, consisting of three groups of birds (slow-growing - SG; fast-growing fed ad libitum - FGAL; and fast-growing pair-fed with SG broilers - FGPF) and two iso-protein diets (a 3100 kcal ME/kg low-fiber diet - LFD- and a 2800 kcal ME/kg high-fiber diet - HFD- with 14% wheat bran and 4% oat hulls). HFD-fed birds presented lower ME retention (p &lt; 0.001) and lower dry matter metabolizability (DMM) (p...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Fiber; Metabolism; Pair-fed; Strain.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000200003

Assessment of Egg Quality in Native and Foreign Laying Hybrids Reared in Different Cage Densities
Provedor de dados: 89
Autores: Ozenturk,U; Yildiz,A.
ABSTRACT This study aimed to compare the eggs of the native-Turkish Atak-S (A-S) hybrid and the foreign brown layer Isa Brown (IB) and white layer Novogen White (NW) hybrids reared in two different cage densities (468.75 cm2/hen and 312.50 cm2/hen) in terms of the internal and external quality parameters of the eggs. A total of 540 hens including 180 from each genotype were used. To determine the egg quality characteristics, one randomly selected egg was taken out of each cage every 4 weeks in the yield period of 24-68 weeks, and analysis were carried out. A total of 648 eggs were used. In the study, the effect of genotype on all parameters was found to be significant. The shell thickness, Haugh unit and albumen index were lower in the Atak-S hybrid. In...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Atak-S; Cage density; Egg quality; Laying hens.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000300313

Beak trimming methods and their effect on the performance and egg quality of Japanese quails (Coturnix japonica) during lay
Provedor de dados: 89
Autores: Pizzolante,CC; Garcia,EA; Saldanha,ESPB; Laganá,C; Faitarone,ABG; Souza,HBA; Pelicia,K.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Beak trimming; Feathering; Performance; Quails.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000100003

Effect of Exogenous Emulsifier (Lyso-Phospholipid) Supplementation in the Broiler Diet, on the Feed Intake and Growth Performance During Grower Phase
Provedor de dados: 89
Autores: Shahid,I; Sharif,M; Yousaf,M; Ahmad,F; Virk,MR; Bilal,MQ; Anwar,U; Ali,A; Hussain,M; Chishti,MFA; Rahman,MA.
ABSTRACT The objective of this experiment was to investigate the effect of supplementation of an exogenous emulsifier (lyso-phospholipid) in the diet of growing broilers on growth performance and digestibility. A total of 1224 Ross-308 ten day old broiler chicks were distributed into two experimental treatments in such a way that each treatment had twelve replicates with fifty-one birds per replicate. Two experimental diets were formulated with and without emulsifier supplementation according to the nutrition standards of Ross 308. Feed intake and body weight gain of the broilers were measured on a daily basis and feed conversion ratio was also calculated. Nutrient digestibility was determined on the 25th day of age. Analysis of variance under completely...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Additivies; Broiler chicks; Carcass; Ross 308.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2021000100307

Assessment of Egg Quality in Native and Foreign Laying Hybrids Reared in Different Cage Densities
Provedor de dados: 89
Autores: Ozenturk,U; Yildiz,A.
ABSTRACT This study aimed to compare the eggs of the native-Turkish Atak-S (A-S) hybrid and the foreign brown layer Isa Brown (IB) and white layer Novogen White (NW) hybrids reared in two different cage densities (468.75 cm2/hen and 312.50 cm2/hen) in terms of the internal and external quality parameters of the eggs. A total of 540 hens including 180 from each genotype were used. To determine the egg quality characteristics, one randomly selected egg was taken out of each cage every 4 weeks in the yield period of 24-68 weeks, and analysis were carried out. A total of 648 eggs were used. In the study, the effect of genotype on all parameters was found to be significant. The shell thickness, Haugh unit and albumen index were lower in the Atak-S hybrid. In...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Atak-S; Cage density; Egg quality; Laying hens.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000400313

Age and multiple mating effects on reproductive success of Grapholita molesta (Busck) (Lepidoptera, Tortricidae)
Provedor de dados: 92
Autores: Morais,Rosana M. de; Redaelli,Luiza R.; Sant'Ana,Josué.
The reproductive success of the oriental peach moth was evaluated in four experiments: 1) assessment of the mating duration, fecundity, fertility and longevity of females paired with virgin and immediately mated males; 2) mating duration, spermatophore size, fecundity, fertility and longevity in females paired with virgin and up to four times mated males; 3) receptivity of females to additional copulations after mating with virgin or mated males, and the effects of this behavior in female fecundity, fertility and longevity; 4) influence of insects age in the reproductive output. Males (33%) could copulate immediately after a previous copula. They were fertile until the fourth mating, but only in the first copula they transferred the longest (1.43 ± 0.10...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Copulations; Fertility; Oriental fruit moth.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262012000300009

Spatial and temporal variation in population structure of Hemigrammus marginatus (Characiformes: Characidae) in streams of the Ivinhema River Basin, Brazil
Provedor de dados: 103
Autores: Lourenço,Luzia da Silva; Fernandes,Izaias Médice; Súarez,Yzel Rondon.
The present study has assessed spatial and temporal variations in the length structure of Hemigrammus marginatus Ellis, 1911 and estimated growth parameters for the species. Sampling was carried out in five streams in the Vitória and Piravevê sub-basins of the Ivinhema River from January to December 2002. A total of 933 specimens of H. marginatus were caught (97 in the Vitória sub-basin and 836 in the Piravevê sub-basin). Mean length of the individuals caught in the Piravevê sub-basin was shorter (21.58 mm, SD = 4.67) than that of individuals caught in the Vitória sub-basin (29.24 mm, SD = 4.42). Analysis of condition factor calculated from the weight/length relationship revealed that the values were constant both spatially (between sub-basins) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Growth; Mortality; Recruitment; Weight-length relationship.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000400003

Technological quality of eggs in relation to the age of laying hens and Japanese quails
Provedor de dados: 96
Autores: Zita,Lukas; Ledvinka,Zdenek; Tumova,Eva; Klesalova,Ludmila.
This investigation was carried out to evaluate certain egg quality characteristics of ISA Brown laying hens and Japanese quails (Coturnix coturnix japonica) in relation to their age. One hundred forty-four brown-egg ISA Brown laying hens and one hundred female quails were used in the study. A total of 1,678 eggs of laying hens and 2,060 eggs of Japanese quails were used during the experiment. The eggs for technological values were collected during two consecutive days in a 4-week period when the laying hens were from 20 to 60 weeks of age and the quails were from nine to 49 weeks of age. The results show that egg weight was affected by the age of the hens and quails (overall means 61.13 g and 12.52 g, respectively). Despite frequens fluctuations, as the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Egg quality; ISA Brown; Layers; Quails.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000900016

Brazilian consumers' perception of tenderness of beef steaks classified by shear force and taste
Provedor de dados: 63
Autores: Delgado,Eduardo Francisquine; Aguiar,Ana Paula; Ortega,Edwin Moisés Marcos; Spoto,Marta Helena Fillet; Castillo,Carmen Josefina Contreras.
The knowledge of consumer perception of meat tenderness and taste is essential to forecast a Brazilian quality value-based beef market. This study aimed to verify perception of tender (WBSF &lt; 4.1 kg) from tough (&gt; 4.8 kg) strip loin steak or uncharacteristic (calcium-treated/Ca-IM) and normal (non-calcium/NO-Ca) meat taste by consumers according to gender, age, education and income levels. Steaks were previously classified by shear force measurements as tender or tough. Each consumer was served a paired sample of one tender and of one tough steak, which were either Ca-IM or NO-Ca treated before tenderness classification. Three hundred and eight consumers answered a nine-point intensity (tenderness) and hedonic (taste) scales evaluation questionnaire....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gender; Age; Education; Income; Calcium.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000300004

Age and growth of Hypophthalmus edentatus (Spix), (Siluriformes, Hypophthalmidae) in the Itaipu Reservoir, Paraná, Brazil
Provedor de dados: 104
Autores: Ambrósio,Ângela Maria; Gomes,Luiz Carlos; Agostinho,Ângelo Antônio.
Age and growth of Hypophthalmus edentatus (Spix, 1829) (Siluriformes, Hypophthalmidae) was determined. Data were collected from December 1983 to November 1984 and from April 1997 to March 1998 in the Itaipu Reservoir. To evaluate reading consistency, it was analyzed the coefficient of variation of the total length for each annulus observed in the otoliths. Through marginal increment analysis, it was determined that the annuli formed annually (April) indicating that otoliths may be used in the study of age and growth of the species. Food supply was considered the main factor affecting growth and annuli formation in both periods. Back-calculated data were used to assess if the Rosa Lee phenomenon, commom in selective samples like commercial fishing, occured....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Growth; Hypophthalmus edentatus; Itaipu Reservoir; Otoliths.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000200002

Crescimento de Schizodon Intermedius Garavello &amp;amp; Britski (Ostheichthyes, Anostomidae) do Rio Tibagi (Sertanópolis, Paraná)
Provedor de dados: 104
Autores: Orsi,Mário Luís; Shibatta,Oscar Akio.
This work consists of age, growth, and circuli formation period determination and the relation of reproduction, temperature, and pluviosity on the growth of S. intermedius Garavello &amp;amp; Britski, 1990. The growth curve was adjusted by the Bertalanfy's expression and the relationship between weight and size was made by the minimum square method to determine the conditioning factor. Gonadossomatic index (IGS) was used to study the reproduction. The assintotic values for length were 33,94 cm and 44,81 cm for males and females, respectively. The circulus were formed annually and the growth was slow and the maximum age was determined to be nine years. The formation of the circuli was influenced by the reproduction, probably allied to other abiotic factors...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Schizodon intermedius; Age; Growth; Tibagi river.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000300009

Determining factors for an increase in consumption of fresh vegetable by habitants in the Caribbean region of Colombia
Provedor de dados: 109
Autores: Martínez-Reina,Antonio María.
Abstract The aim of this study was to establish elements to understand the consumers reasons to increase the quantities of fresh vegetables consumed in the Caribbean Region of Colombia. With information from 308 surveys applied randomly in seven cities of the Caribbean Region and using a structured survey that included variables such as age, family composition, prices, income, a Logit econometric model was formulated. Furthermore, with the contingent valuation method, parameters were estimated using maximum likelihood; moreover, the reasons that explain the possibility that families increase vegetable consumption were identified. Results allow us to appreciate first that 53 % of the surveyed respondents would be willing to increase consumption. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Preferences; Decisions; Prices; Income; Age; Schooling; Quantity; Quality; Vegetable consumption.
Ano: 2019
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122019000100001

Analysis of growth curves in different lineages of Caipira broiler type
Provedor de dados: 2
Autores: 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

Habitat use by Atherinella brasiliensis (Quoy &amp; Gaimard, 1825) in intertidal zones of a subtropical estuary, Brazil
Provedor de dados: 3
Autores: Carvalho, Barbara Maichak de; Spach, Henry Louis.
Habitat use is different along the ontogenetic development of some species and may be influenced by environmental parameters. This study described the interaction of Atherinella brasiliensis caught in intertidal areas of the Paranaguá Estuarine Complex with environmental parameters. We caught 10024 individuals between August 2010 and July 2011, with total mean length of 44.32 mm (SD ± 25.37 mm), variation range between 12 and 142 mm, and weight between 0.01 and 73 g, averaging 1.35 g (SD ± 2.66 g) and ages estimated between &lt; 1 and 22 months. Significant differences were detected between sectors and periods for number of individuals and weight at capture, with higher mean values in the mean sector during the rainy period. The spatial and temporal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ciências Biológicas Atheriniformes; Distribution; Age; Environmental parameters Ecologia.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/25205

Contrasting life-histories in two syntopic amphibians of the Leptodactylus fuscus group (Heyer 1978)
Provedor de dados: 42
Autores: MARANGONI,FEDERICO; COURTIS,AZUL; PIÑEIRO,JOSE M.; INGARAMO,MARÍA DEL ROSARIO; CAJADE,RODRIGO; STĂNESCU,FLORINA.
Abstract Abstract: We used skeletochronology to compare age, size, reproductive parameters and growth patterns of two related, anuran amphibians from Northern Argentina: Leptodactylus bufonius(n=69) andL. latinasus(n=56), in order to better understand their coexistence in syntopy. Previous studies showed that the two species overlap in their dietary requirements and utilize the same habitats for feeding and breeding. We found that their life-history patterns are significantly different,L. bufoniusbeing larger, and having a higher reproductive output and lifespan, compared to the smaller and shorter-livingL. latinasus. Since none of the species exhibited sexual size dimorphism, and both acquired sexual maturity after the first year of life, we suggest that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Anura; Body size; Growth; Leptodactylus bufonius; Leptodactylus latinansus.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500605

Identification of microchips through diagnostic imaging helps to determine the longevity of the golden lancehead (Bothrops insularis) in captivity
Provedor de dados: 45
Autores: Garcia,V.C.; Unruh,S.M.; Almeida-Santos,S.M.
RESUMO As serpentes vindas da natureza e encaminhadas para centros de reabilitação ou de pesquisa têm uma idade incerta. Na natureza, esses animais, muitas vezes atingem um tamanho corpóreo menor do que os indivíduos cativos devido a uma menor frequência de alimentação. Assim, a idade de uma cobra recém-chegada da natureza é geralmente estimada com base em seu tamanho corpóreo, o qual é comparado com dados em cativeiro. A utilização dos meios de diagnóstico por imagem tem auxiliado a medicina na análise das serpentes em cativeiro, mediante avaliação da estrutura óssea, dos órgãos e de alterações. Este trabalho relata o uso de diagnóstico por imagem (radiografia e ultrassonografia) para identificar a presença de microchips e, consequentemente, estimar a...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Snake; Radiology; Ultrasound; Body size; Age.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352020000100281

Weight evaluation of Tabapuã cattle raised in northeastern Brazil using random-regression models
Provedor de dados: 45
Autores: 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

Detection of Clostridium sp. and its Relation to Different Ages and Gastrointestinal Segments as Measured by Molecular Analysis of 16S rRNA Genes
Provedor de dados: 52
Autores: Mirhosseini,Seyed Ziaeddin; Seidavi,Alireza; Shivazad,Mahmoud; Chamani,Mohammad; Sadeghi,Ali Asghar; Pourseify,Reza.
The objective of this study was to establish a specific, sensitive and rapid PCR approach for the detection of Clostridium sp. at the genus level. Clostridium sp. in the duodenum, jejunum, ileum and cecum of broiler chickens were analyzed by 16S rRNA genes. The PCR detected the presence of Clostridium spp. in naturally contaminated intestinal samples. For the total gastrointestinal segments, 53.125, 65.625 and 59.375% samples were positive for naturally occurring Clostridium spp. at the ages 4, 14 and 30d, respectively. Analysis of the microbial contents indicated that Clostridium sp. was not consistently detected in all intestinal segments. These results can put in evidence the hypothesis that Clostridium spp. may be interfering in health and performance...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Clostridium spp.; Broiler; Gastrointestinal; Age; 16S rRNA genes.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000100009

Gladius and statolith as tools for age and growth studies of the squid Loligo plei (Teuthida: Loliginidae) off southern Brazil
Provedor de dados: 52
Autores: Perez,José Angel Alvarez; Aguiar,Daniela Cordella de; Santos,João Antônio Teixeira dos.
Statolith and gladius were investigated for their suitability as tools for age and growth studies in the loliginid squid Loligo plei off southern Brazil. Statoliths when polished, revealed a series of concentric increments deposited around a nucleus. Consistent increment counts covered the squid's entire life-time and could be considered suitable for individual age estimation. Growth increments were observed on the dorsal surface as delimited by consecutive marks formed during low growth periods. Because early growth was masked during chitin deposition, total increment counts underestimated individual age. Gladius growth was highly correlated with somatic growth, and gladius increments could be used to reconstruct individual growth histories. Both...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cephalopods; Statolith; Gladius; Age; Loligo plei; Growth.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000600009

Epidemiological estimates of Respiratory diseases in the hospital population, Faisalabad, Pakistan.
Provedor de dados: 52
Autores: Sultana,Tayyaba; Afzal,Aqsa; Sultana,Salma; Al-Ghanim,Khalid; Shahid,Tehniat; Jabeen,Zahra; Turab,Nusrat; Ahmed,Z.; Mahboob,Shahid.
ABSTRACT  A cross sectional study was conducted in two types of respiratory patients in hospital population. It was found that tuberculosis (T.B) was the most common type (29.66%) followed by the asthma (28.08%) and chronic obstructive pulmonary disease (COPD) (11.31%). Average age of diagnosis was 42.15 ± 0.65 years and average age at present 47.99 ± 0.70 years. Age group 51-60 years was more prone to this disease (21.13%). Most of the patients were married (80.06%). The highest representation of patients with respiratory diseases was observed in 1st birth order (30.36%) followed by 2nd (26.49%) and 3rd (18.45%), while the lowest was in 10th birth order (0.40%). Tuberculosis, asthma and COPD are the most prevalent types of respiratory diseases....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Respiratory; Age; Sex; Urban; Rural; Income.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132017000100418

Relationship between dental morphology, sex, body length and age in Pontoporia blainvillei and Sotalia fluviatilis (Cetacea) in Northern Rio de Janeiro, Brazil
Provedor de dados: 57
Autores: RAMOS,R. M. A.; DI BENEDITTO,A. P. M.; LIMA,N. R. W.
The relationship between dental morphology, sex, body length and age of small cetaceans can be used to determine ontogeny, sexual dimorphism and geographical variation. The objective of this study was to determine the relationship between dental morphology, sex, body size and age. A total of 91 specimens of P. blainvillei and 80 specimens of S. fluviatilis accidentally captured in fisheries or stranded in northern Rio de Janeiro (21º37'-22º25'S), from September 1988 to November 1996 were analysed. The teeth root diameter in P. blainvillei was significantly different between the sex; the values for females were larger than males. In neither species aid we observed significant in variations dimension and number of teeth, thickness of dentine and cemental...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pontoporia blainvillei; Sotalia fluviatilis; Dental morphology; Age; Small cetaceans.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000200012

Association of IL-8-inducing strains of diffusely adherent Escherichia coli with sporadic diarrheal patients with less than 5 years of age
Provedor de dados: 55
Autores: Meraz,Ismail Mustafa; Arikawa,Kentaro; Nakamura,Hiromi; Ogasawara,Jun; Hase,Atsushi; Nishikawa,Yoshikazu.
The role of diffusely adherent Escherichia coli (DAEC) in diarrheal disease has been controversial. However, DAEC strains were recently implicated in diarrheal disease in developing countries. To clarify whether DAEC are prevalent among sporadic cases of diarrheal illness in Osaka City, Japan, E. coli strains isolated between July 1997 and March 2000 during diarrheagenic E. coli (DEC) investigation were retrospectively examined. DAEC strains were recognized among 41 (4.4%) of 924 patients and formed the biggest subgroup of DEC. Previously, we reported that some DAEC strains caused epithelial cells to secrete as much IL-8 as enteroaggregative E. coli strains did. In this study, we attempted to evaluate epidemiologically whether the ability of DAEC to induce...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: DAEC; IL-8; Afa; Age; Epidemiology.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702007000100012

Leptospirosis in elderly patients
Provedor de dados: 55
Autores: Gancheva,Galya Ivanova.
Leptospirosis is a re-emerging zoonosis with broad clinical spectrum and high mortality in severe forms. The aim of this study was to analyze clinical manifestations, laboratory findings, epidemiological data, and management in elderly patients with leptospirosis. Toward that end, we performed a descriptive analysis of 15 leptospirosis elderly cases (age 60-78 years) treated at the Clinic of Infectious Diseases of University Hospital - Pleven (1976-2012). Patients were serologically confirmed by microscopic agglutination test. Twelve cases (80%) presented with the severe form of leptospirosis. Co-morbidity (hypertonic diseases, chronic pulmonary diseases, chronic alcohol abuse, and diabetes) was registered in 13 cases. All cases had fever, oliguria,...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Acute renal failure; Age; Leptospirosis; Outcome.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702013000500012

A study of the abilities in oral language comprehension of the Boston Diagnostic Aphasia Examination - Portuguese version: a reference guide for the Brazilian population
Provedor de dados: 56
Autores: Mansur,L.L.; Radanovic,M.; Taquemori,L.; Greco,L.; Araújo,G.C.
We analyzed the performance of 162 normal subjects, subdivided into groups according to age and schooling, in the oral comprehension tasks of the Boston Diagnostic Aphasia Examination translated and adapted to Brazilian Portuguese to obtain a profile of performance for the Brazilian population, as well as cut-off scores for each task, and to determine the best combination of tasks that distinguish normal from aphasic subjects, as a guide for clinicians. The normal subjects were compared to 69 aphasics. Age alone influenced the performance in the designation of actions (subjects above 70 years showing the worst performance); schooling alone influenced the comprehension of forms, colors and numbers (subjects with less than four years of education showing a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oral comprehension; Age; Schooling; Boston Diagnostic Aphasia Examination; Brazilian Portuguese.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000200017

Variability of Vernier acuity measurements in untrained subjects of different ages
Provedor de dados: 56
Autores: Abbud,C.M.M.; Cruz,A.A.V.
The Vernier acuity of 50 normal untrained subjects (20 males and 30 females) was measured by the method of adjustment. Subjects were divided into five age ranges with 10 subjects in each age group: 5-10, 11-20, 21-30, 31-40, and 41-50 years. All subjects had normal visual acuity (20/20) and volunteered to participate in the experiment. Children were selected from a local school and adults recruited from the technical staff of the Department of Ophthalmology of the School of Medicine. Vernier acuity was higher in adults compared to children. Intraindividual variability was high and it was estimated that for most individuals of all age groups a range of 100 to 700 trials was necessary to obtain a mean with a precision of 10%. These results suggest that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vernier acuity; Variability; Age.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000200011

Reference value of brachial-ankle pulse wave velocity for the eastern Chinese population and potential influencing factors
Provedor de dados: 56
Autores: Zi-Sheng,Ai; Jue,Li; Zhong-Min,Liu; Hui-Min,Fan; Zhang,Dai-Fu; Yun,Zhu; Zhang,Li-Juan; Zhu,Wen-Qing; Bao,Yan.
The present study was conducted to obtain reference values for brachial-ankle pulse wave velocity (baPWV) and to evaluate influencing factors of baPWV according to gender. Using automatic devices, baPWV was measured simultaneously in 2095 subjects. A total of 647 healthy subjects, none of whom presented atherosclerotic risk factors, were analyzed in the present study. Two different statistical methods were used to obtain reference values for baPWV according to subject gender and age. The association between baPWV value and gender, as well as other features, were analyzed. For male subjects, multiple stepwise analysis showed that age, systolic blood pressure (SBP), heart rate (HR), and plasma levels of triglycerides (TG) were independent predictors of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pulse wave velocity; Reference value; Age; Gender; Influencing factor.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011001000004

Age effects on the pharmacokinetics of tityustoxin from Tityus serrulatus scorpion venom in rats
Provedor de dados: 56
Autores: Nunan,E.A.; Arya,V.; Hochhaus,G.; Cardoso,V.N.; Moraes-Santos,T.
The pharmacokinetics of scorpion venom and its toxins has been investigated in experimental models using adult animals, although, severe scorpion accidents are associated more frequently with children. We compared the effect of age on the pharmacokinetics of tityustoxin, one of the most active principles of Tityus serrulatus venom, in young male/female rats (21-22 days old, N = 5-8) and in adult male rats (150-160 days old, N = 5-8). Tityustoxin (6 µg) labeled with 99mTechnetium was administered subcutaneously to young and adult rats. The plasma concentration vs time data were subjected to non-compartmental pharmacokinetic analysis to obtain estimates of various pharmacokinetic parameters such as total body clearance (CL/F), distribution volume (Vd/F),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Scorpion venom; Tityustoxin; Pharmacokinetics; Age; Bootstrapping resampling; Non-compartmental analysis.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000300016

Stem and soil CO2 efflux responses of Pinus radiata plantations to temperature, season, age, time (day/night) and fertilization
Provedor de dados: 118
Autores: Bown,Horacio E; Watt,Michael S.
Stem CO2 efflux is a highly variable component of the carbon budget of forest ecosystems. It reflects the balance between the CO2 respired by the living stem tissues, less the CO2 dissolved in the xylem sap moving upward in the transpiration stream, plus the CO2 transported from the roots and released at the stem. Although knowledge about such fluxes at different spatial and temporal scales has markedly increased, knowledge of the effects of silviculture treatments, such as fertilization, on stem CO2 effluxes are still limited, particularly when connecting above- and belowground processes. Using measurements obtained from twin plots (one control, one fertilized) installed in five-, 12- and 23-year-old stands of Pinus radiata, the objective of this study...
Tipo: Journal article
Palavras-chave: Aboveground; Age; Belowground; CO2 efflux; Fertilization; Forest plantation.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000100009

Nonlinear modeling growth body weight of Mangalarga Marchador horses
Provedor de dados: 65
Autores: Souza,Felipe Amorim Caetano; Fernandes,Tales Jesus; Moura,Raquel Silva de; Meirelles,Sarah Laguna Conceição; Ribeiro,Rafaela Aparecida; Cunha,Fabiana Oliveira; Muniz,Joel Augusto.
ABSTRACT: The analysis of the growth and development of various species has been done using the growth curves of the specific animal based on non-linear models. The objective of the current study was to evaluate the fit of the Brody, Gompertz, Logistic and von Bertalanffy models to the cross-sectional data of the live weight of the MangalargaMarchador horses to identify the best model and make accurate predictions regarding the growth and maturity in the males and females of this breed. The study involved recording the weight of 214 horses, of which 94 were males and 120 were non-pregnant females, between 6 and 153 months of age. The parameters of the model were estimated by employing the method of least squares, using the iteratively regularized...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Body weight; Cross-sectional method; Statistical models.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000400657

Seroprevalence of bovine echinococcusis in Pakistan
Provedor de dados: 65
Autores: Aziz,Fariha; Tasawar,Zahida; Lashari,Mushtaq Hussain.
ABSTRACT: Cystic echinococcosis is a parasitic infection of worldwide distribution, which, despite causing significant loss of health and money, is still a neglected disease. The present study was performed to determine the prevalence of bovine hydatid disease at Research Centre for the Conservation of Sahiwal Cattle, Jahangirabad, Khanewal, Pakistan. Five hundred bovine serum samples were tested for the detection of bovine Echinococcus antibodies (IgG), using the ELISA kits. Antibodies of bovine Echinococcus were detected in 24.2% cattle. Female cattle showed higher disease prevalence (33.2%) compared to (6.02%) in male cattle. There was positive association between sex of cattle and prevalence (P&lt;0.05). Positive correlation between disease prevalence...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Echinococcus antibodies; Seroprevalence; ELISA; Age; Sex.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000400501