Animal Production

All Items

• Abstracts

  Managing Editor

  161-182
• Sustainable tropical animal production

  Omar Araujo-Febres, Juan A. Vergara-Lopez

  101-106
• Maternal genetic and environment factors influencing lamb birth weight in a pastoral extensive system

  Raquel Pérez-Clariget, Valeria Anastasia, Livia Pinto Santini, Ana Carolina Espasandín

  9-21
• Characterization of dairy farms with a rope grazing system in the southern highlands of Ecuador

  Gonzalo Castro, Graciela A. Castro, Diego V. Maza, Fernando P. Perea

  145-149
• Beef cattle: do we really want them that docile?

  Ana Clara Gonzalez, Héctor Ricardo Ferrari

  117-119
• Good livestock practices to promote animal welfare in Carora crossbred cattle grazing in the Venezuelan Andean foothills

  Darisbel del Valle Cegarra-Quintero, Daniel Antonio Perdomo-Carrillo, María Aidée García-Linares, Miguel F. Perea-Brugal, José Arnoldo Piña-Monsalve, Alejandro José Barreto-Bastidas, Fernando Pedro Perea Ganchou

  199-210
• Induction of estrus with male effect, using vasecomized rams associated or not with ewes in heat in Merino ewes during seasonal anestrus: practical experiences in Uruguay

  Eduardo Lorenzelli, Rodolfo Ungerfeld

  29-35
• Consumption of expanded polystyrene by Tenebrio molitor and Zophobas atratus, and use of their meal as feed for Piaractus brachypomus

  Miguel F. Bonilla-Amaya, Adriana P. Muñoz-Ramírez, Fredy A. Aguilar-Aguilar, Karol Bibiana Barragán-Fonseca

  121-136
• Approach to the current state of insect production for human and animal consumption in Latin America

  Karol Bibiana Barragán-Fonseca, Rodrigo Llaurado

  77-88
• Characterization of cattle ranching in piedmont of Monagas state, Venezuela

  Yenny Garcia, Renny Barrios-Maestre, Guillermo Romero-Marcano, Ernesto Hurtado

  59-68
• G1 mutation of GDF9 gene and its relationship with birth weight in Pelibuey sheep

  Miriam Rosas-Rodríguez, Juan Salazar-Ortiz, Josafhat Salinas Ruiz, Jaime Gallegos-Sánchez, Martha Herández-Rodríguez, Cesar Cortez-Romero

  243-249
• Effect of bougainvillea (Bouganvillea glabra choisy) on egg quality in hens

  Airam Itzel Cacahuatitla Sosa, Maricela Ayala Martínez, Sergio Soto Simental, Liliana Ortega Gonzaález

  147-151
• Different incubation temperatures of Cobb-500 fertile eggs and their effect on weight loss and chick weight performance

  Vicente Alejandro Intriago Muñoz, Freddy Antonio Coveña Rengifo, Robert Ignacio Zambrano Loor

  403-409
• Supplementary material to Life cycle analysis of beef exports from Argentina

  Rodolfo Gustavo Bongiovanni

  89-91
• Use of Biocolina® in the feeding of Ambystoma velasci pre-adults

  Gabriela Vázquez-Silva, J. Antonio Martínez García, Jordan D Martínez Alvarado, Guido S. Rayo Leyva, A. Karen López De la Rosa, Pedro A. Hernández García, Germán D. Mendoza Martínez, César Díaz Galván

  165-168
• Vitamin A and E and its influence on free radical scavenging activity in goat kids

  Reyna Lucero Camacho Morales, Juan González Maldonado, Néstor Arce Vazquez, Bayron Pérez Bustillos, José Alfredo Martínez Quintana, Monserrath Félix Portillo, Lorenzo Buenabad Carrasco

  263-268
• Effect of the size and sex of the pigs at the beginning of the finishing phase on productive indicators at the end of fattening

  Pablo Gómez Montejo, Marleni Michelle Montiel Pérez, Antonio González de Bulnes López, Elena Castillo Cavero, Jonathan Emanuel, Rufino López Ordaz, Agustín Ruíz Flores

  121-130
• Effect of a polyherbal mixture on methane abatement: an in vitro study

  Cesar Díaz Galván, German David Mendoza Martínez, Pedro Abel Hernández García, Enrique Espinosa Ayala, Gabriela Vázquez Silva, Pablo Benjamín Razo Ortíz, Adrián Gloria Trujillo

  201-205
• Effect of Saccharomyces cerevisiae dietary supplementation on productive parameters and nutrient utilization of growing Japanese quail (Coturnix coturnix japonica)

  Carlos Alfredo Gaona Rodríguez, Hugo Bernal Barragán, Nydia Corina Vásquez Aguilar, Jesús Jaime Hernández Escareño, Adriana Morales Trejo, Miguel Cervantes Ramírez

  153-157
• Polyherbal formulas in lamb feeding to improve productive performance

  Pablo Benjamín Razo Ortíz, Germán David Mendoza Martínez, Pedro Abel Hernández García, Gabriela Vázquez Silva, Cesar Díaz Galván, Enrique Espinosa Ayala

  187-190
• Shape of curve lactation affects the fitting of empirical and mechanistic models applied to dairy sheep lactations in Mexico

  Lilian Paola Guevara Muñeton, Leonardo Siquieira Gloria, Mohamed Benaouda, Isaac Alberto Teuntle-Lopez, Ximena Sofia Valdes-Cordoba, Juan Carlos Angeles-Hernandez, Elon Souza Aniceto, Armando Peláez Acero

  305-311
• Performance of beef cattle in integrated agricultural production systems with marandu grass and cassava

  Katia F. Gobbi, Mateus Carvalho Basílio de Azevedo, Simony Marta Bernardo Lugão, Vanderlei Bett, Mario Takahashi

  397-401
• Lunar phases and their influence on reproductive variables of bovines in the dry tropics Lunar phases and their influence on reproductive variables of bovines in the dry tropics

  Canuto Muñoz-García, Rosendo Cuicas-Huerta, Jairo Vargas-Díaz, Juan González-Maldonado, Efrén Estrada-Paqui, Isidro Jauregui-Plata , Julio Cesar Gómez-Vargas

  35-38
• The economic value of the Carbon Footprint in dairy farms in Argentina

  Patricia L. Engler

  313-320
• Vaginally use of iButton loggers to measure body temperature in grazing red deer (Cervus elaphus)

  Lorenzo Alvarez Ramirez, Gabriela Arteaga-Salazar, Alejandra Sánchez-Cervantes

  187-194
• Carbon cycle of native pasture-based beef cattle production systems in the Pantanal area of the Paraguayan Chaco

  Diego Avilio Ocampos Olmedo, Pedro Luis Paniagua, Luis Alberto Alonzo Griffith, Guido Arnaldo Portillo

  103-114
• Effect of the Covid-19 pandemic on milk production per hectare in Ecuadorian herds

  Guillermo Emilio Guevara Viera, Raúl Victorino Guevara Viera, Carlos Santiago Torres Inga, Ángel Eduardo Ceró Rizo

  95-97
• Pecan shelling by-product as an alternative feedstuff in diets of laying hens: performance and yolk color

  Luis Raúl García Flores, Néstor Arce-Vazquez, Mario Alberto García Quiñonez, Esteban Eduardo Martínez Álvarez, José Alfredo Martínez-Quintana, Iván Adrián García Galicia, Juan González Maldonado, Román González-Escobedo, Lorenzo Buenabad Carrasco

  163-165
• Use of feed additives to improve feed efficiency and growth of feedlot cattle

  Marcos V. C. Ferraz Junior, Pedro H. V. Carvalho

  27-35
• Repeatability and variability of measurements of methane and carbon dioxide production in cattle housed in open-circuit respiration chambers

  Ever del Jesus Flores Santiago, Juan Carlos Ku Vera, Roberto González Garduño, Humberto Vaquera Huerta , Paulina Vásquez Mendoza, Jesús Miguel Calzada Marin

  319-329
• Effect of the energy level of the diet in the last third of gestation on the productive and reproductive performance of beef cows and their offspring. Nutrición preparto y desempeño de la vaca y su descendencia

  Carlos Batista, José Ignacio Velazco, Graciela Quintans

  331-329
• Egg quality of commercial laying hens stored at different temperatures and periods

  Ralston Borges da Silva, Ana Carolina de Souza Guedes , Michele Laboissière, Carlos de Melo e Silva Neto, Paulo Vitor Divino Xavier de Freitas

  69-75
• Cashmere in Criolla Neuquina goats: influence of the shearing period on the quantity and quality of the fiber

  Julia Maurino, Diego Sacchero, María Rosa Lanari

  321-329
• Assessing the impact of Bos taurus x Bos indicus crossbreeding and postmortem technologies on the eating quality of loins from pasturefinished young bulls

  Tomas Riera-Sigala, Nelson Huerta-Leidenz, Argenis Rodas-González, Margarita Arispe Zubillaga, Nancy C. Jerez Timaure

  263-273
• Carbon footprint of meat. Case study

  Rodolfo Gustavo Bongiovanni, Leticia Tuninetti

  49-63
• Cattle production in the Latin American region, scope and limitations

  Daniel Rearte

  7-14
• Urban and peri-urban livestock

  Managing Editor
• Nutrition and production of monogastric species

  Managing Editor
• International Congress of Dual Purpose Livestock

  Managing Editor
• Alternative food sources

  Managing Editor
• Life Cycle Analysis of export beef from Argentina .

  Rodolfo Gustavo Bongiovanni, Leticia Tuninetti, Verónica Charlón, Mariano Minaglia

  69-91
• Effect of litter size on stillbirths and mortality of Large White litters from birth to 21 days of age

  Francisco Antonio Tenorio Fireman, Frank Siewerdt , Alba Kyonara Barbosa Fireman

  83-90
• Welfare assessment of horses ridden in the Costa Rica National Horse Parade

  Ana Margarita Arias Esquivel, Luis A. Villalobos-Villalobos , Carissa L. Wickens, Erika Camacho

  311-319
• Characterization of productive and economic results in cattle and sheep farms with Voisin Rational Grazing in Uruguay

  María Belén López Pérez, Gustavo Benítez, Emiliano Guedes, Santiago Monteverde, Francisco Dieguez

  253-262
• In vivo carcass evaluation and body measurements of Dorper ewe in different age groups

  Carolina Freitas Rosa e Paula, Thaís Fitaroni Ramos Larcerda, Natalia Mercedes Vallejos, André Torres Geraldo, Camila da Conceição Cordeiro, Celia Raquel Quirino

  301-310
• Effect of different heating systems on the performance of suckling piglets

  Hugo Juan Petrocelli

  17-25
• Instruction to authors (E)

  Managing Editor

  59-64
• Instructions to authors (P)

  Managing Editor

  65-70
• Influence of different feeding strategies on carcass and meat quality of grassfed cull cows

  Ximena Lagomarsino, Fiorella Cazzuli, Maria Maria Font-i-Furnols, Santiago Luzardo, Fabio Montossi

  191-203
• Prediction of dry matter intake and average daily gain of the LRNS (1.0.33) and NRC (2000) nutritional models in confined bulls in Paraguay

  Guido Arnaldo Portillo, Diego Avilio Ocampos Olmedo, Pedro Luis Paniagua Alcaraz , Luis Alberto Alonzo Griffith

  9-17
• Technical note: The Dominican Criollo Dairy Cattle. An alternative to Climate Change

  Joaquín Caridad del Rosario, Miguel Ceballos Pouerie

  133-139
• Effect of frequency of protein energy supplementation on the performance of Nelore steers during the dry season

  Luiz Fernandes Montes, Milton Ghedini Cardoso, Marcos Aurélio Lopes, Adilson de Paula Almeida Aguiar, Joana Resende Paglis Brunoro, Henrique Salomão Queiroz, Mônica Auxiliadora Mesquita Cardoso

  1-7
• Preliminary observations on carcass traits and meat yield of five types of Brahman-influenced grass-fed bulls

  Tomas Riera Sigala, Nelson O. Huerta Leidenz, Nancy C Jerez Timaure, Argenis Rodas Gonzalez, Jorge A. Ordonez Vela, Alexis Moya

  67-77
• Preliminary analysis of growth, carcass and meat quality traits in Uruguayan Creole Cattle steers in comparison with Hereford steers.

  Eileen Armstrong, Danilo Fila, Juan Carlos Boggio , Rafael Aragunde, Felipe Saravia, Agustín Isaurralde, Rody Artigas, Fernando Vila, Santiago Luzardo, Gustavo Brito, Gerardo Evia, Gerardo Dattele

  181-190
• Phenotypic characterization of Creole swine from the Center-South region of Paraná, Brazil

  Denyse Maria Leite, Ananda Aguiar, Valderes Aparecida Sousa, Maria Marta Loddi, Anna Paula Holzmann Mass, Marson Warpechowiski, Ricardo Zanella

  237-246
• Protein levels in concentrate from Curraleiro Pé Duro cows: intake, digestibility, production and milk composition

  Franscine Kelli Quinhones Bonatti, Paloma Maria Leite Franciscatti , Marcus Vinicius Morais de Oliveira, Dirce Ferreira Luz

  277-286
• Lactation curve of Pantaneira cows in the upper Pantanal Sul-Mato-Grossense/Brazil: characteristics and model adjustment

  Paloma Maria Leite Franciscatti, Franscine Kelli Quinhones Bonatti, Marcus Vinicius Morais de Oliveira, Dirce Ferreira Luz, Gustavo Eduardo Marcatti

  129-138
• Productive behavior, quality of beef and meat of Criollo Argentino steers, Braford and their F1 crosses fattened in the corral. preliminary information

  María Zimerman, Diego Bottegal, Jorge Ferrario, Maria Florencia Ortega Masague, Fernando Holgado, Sandra Martínez, Maria José Fernández Salom, Natalia Taboada, Victoria Royo, Álvaro Molina, Agustin Lopez, Olegario Hernández, José Nasca

  91-100
• A phenotypic characterization of Rarámuri Criollo cattle introduced into the Southwestern United States

  Matthew McIntosh, Alfredo Gonzalez, Andres Cibils, Rick Estell, Shelemia Nyamuryekunge, Felipe Rodriguez Almeida, Sheri Spiegal

  111-119
• Wool quality and daily weight gain in native lambs from the Central Region of Argentina

  María Bettina Gómez, Melina Castillo

  21-28
• The Slick Holstein as an alternative to cope with heat stress in tropical dairy operations

  Bianca Ortiz-Uriarte, Natalia Rosa-Padilla, Rafael López-López, Jaime Curbelo-Rodríguez, Verónica Negrón-Pérez, Guillermo Ortiz-Colón

  145-153
• Local breeds in environmental emergencies: performance and contributions from the repopulation with Neuquén Creole Goats in Patagonia, Argentina.

  Maria Rosa Lanari, Pablo Losardo, Marcelo Javier Pérez Centeno, Martin Moronta, Mercedes Ejarque, Sofia Lammel, Graciela Preda, Ana Maria Cumilaf, Alejandro Fornasa

  191-197
• Colombian Creole cattle Sanmartinero, their conservation and sustainable contribution to bovine production in the Colombian Orinoquia

  German Martinez Correal, Hernando Florez Diaz, G. C. Martinez Villarte

  69-86
• Sensory quality and nutritional composition of the Longissimus dorsi muscle of creole, Zebu cattle and their crossbreed in Colombia

  Hernando Florez Diaz, Leandro Mauricio León Llanos, Eudoro Moreno Moreno, Germán Martínez Correal

  163-179
• Current status of the Animal Germplasm Bank in Colombia: organization and management

  Hugo R. Jimenez, Diego H Bejarano, Jose Henry Velazquez Penagos, Eliana Neira Rivera, Luisa A. Rugeles Barandica, Carolina Gonzalez Almario

  151-162
• Quality and in vitro fertility of Uruguayan Criollo bulls’ semen cryopreserved in two commercial diluents

  Yael Filipiak, Eileen Armstrong, Rafael Aragunde, Danilo Fila, Jorge Alvaro Gil Laureiro, Valentina Alvarez, Marcos Pereira, Juan C. Boggio, Clara Larocca, Fernando Vila, María Silvia Llambi Dellacasa

  133-143
• Additive and non-additive effects for mature weight in beef cattle

  Ana Guillenea, Mario Lema, Diego Gimeno, Olga Ravagnolo, Ana Carolina Espasandín

  19-28
• Evaluation of an outdoor production system: 1. Sow performance until birth.

  Hugo Petrocelli, Cecilia Carballo, Nelson Barlocco

  47-57
• Effect of two energy levels during the last third of gestation of beef cows on characteristics of the placenta and offspring at birth.

  Carlos Batista, José Ignacio Velazco, Fernando Baldi, Georgget Banchero, Graciela Quintans

  9-18
• Non ruminant production

  Managing Editor
• Cattle production

  Managing Editor
• Dual-purpose cattle

  Managing Editor
• Importance of tropical sheep introduced into the country: productive and reproductive characteristics

  José A. Atto Mendives
• Use of goats to control undesirable vegetation

  Jean-Marie Luginbuhl, Silvana Pietrosemoli Castagni
• Current situation and projections of goat farming in Peru

  Óscar Arroyo
• A new perspective in perinatal lamb mortality

  Fernando Dutra Quintela
• Nutritional management alternatives to improve survival of newborn lambs

  Georgget Elizabeth Banchero Húnziker
• Comprehensive approaches to livestock production in the Peruvian Amazon

  Jorge Ríos Alvarado
• Use of local agricultural inputs in guinea pig feeding in inter-Andean valleys

  Ronald Jiménez Aliaga
• Reality and perspective of guinea pig breeding in the Andean countries

  Lilia Chauca Francia de Zaldívar
• Achievements obtained in the genetic improvement of guinea pig (Cavia porcellus) INIA experiences

  Lilia Chauca Francia de Zaldívar
• Importance of guinea pig and its competitiveness in the market

  Vladimir Gil Santos
• Facts and myths about South American camelids

  Julio Sumar
• Selection program in South American domestic camelids

  Carlo Renieri, Carlos Pacheco, Alessandro Valbonesi, Eduardo Frank, Marco Antonini
• Storage grain management, causes of deterioration and prevention

  Mario Bolívar Blancas
• Productive efficiency of dairy systems in temperate zones (with special reference to Latin America and Argentina)

  Eduardo Alberto Comeron
• Nutritional strategies to improve reproductive performance in beef cows

  Raquel Perez Clariget, Mariana Carriquiry, Pablo Soca
• Importance of animal welfare in bovine production

  Néstor Sepúlveda, Carmen Gallo, Rodrigo Allende
• Beef cattle and sheep systems management: Computer tools to design and evaluate productive scenarios

  Rodrigo Allende V., Claudio Aguilar G.

  120-126
• Stochastic model to estimate egg production in broiler breeders

  Ramón Alvarez, Paul M. Hocking
• Technologies management by meat beef production: cow-calf

  Júlio Otávio Jardim Barcellos, Ricardo Pedroso Oaigen, Luciana Fagundes Christofari
• Effect of the position of the antenna on the reading efficiency of different types of electronic identification devices in cattle in Argentina

  Enrique Pofcher, M. P. Silvestrini, M. Bonamy, E. Beretta, S. Nava, A. Baldo
• Climate change and animal production

  Arnaldo Álvarez Brito
• Contribution of livestock production to food and nutrition security and reducing poverty in Latin America and the Caribbean

  Tito Díaz
• Production of food of animal origin: news and perspectives

  Theodor Friedrich
• Non-ruminant production; produccion de no-rumiantes; produção de não ruminantes

  Managing Editor
• Sheep and goat production; produccion ovinos y caprinos; produção de ovinos e caprinos

  Managing Editor
• Cattle production; produccion bovinos; produção bovina

  Managing Editor
• Apiculture; apicultura; apicultura

  Managing Editor
• Evaluation of innovation opportunities in productive systems of beef with simulation models

  Claudio F. Machado, Franco Bilotto, Horacio Berger, Pablo Mangudo, Mauricio Arroqui
• The challenge of increasing production of the animal sector while reducing its environmental footprint

  Philippe Chemineau
• Strategic notes on Brazilian beef cattle

  Júlio O. J. Barcellos, Tamara Esteves Oliveira
• Lectures / Presentaciones Orales / Palestras

  Managing Editor
• Production systems/Sistemas de producción/Sistemas de produção

  Managing Editor
• Non-ruminants production/Producción monogástricos/Produção de monogástricos

  Managing Editor
• Milk production/Producción de leche/Produção de leite

  Managing Editor
• Beef production/Producción de carne/Produção de carne

  Managing Editor
• Reducing the Environmental Impact of Animal Production

  Phil C. Garnsworthy
• Conservation of creole cattle in Santa Cruz, Bolivia

  Juan Antonio Pereira
• Recursos zoogeneticos - Carteles

  Managing Editor
• Produccion de bovinos de leche - Carteles

  Managing Editor
• Produccion de bovinos de leche - orales

  Managing Editor
• Produccion de bovinos de carne - Carteles

  Managing Editor
• Produccion de bovinos de carne - orales

  Managing Editor
• Miscelanea - Carteles

  Managing Editor
• Effects of heat stress on milk yield of primiparous Holstein cows at regional scale using large data bases

  Gabriela Silvia Cruz, Jorge I. Urioste, Celmira G. Saravia
• Management of pig manure in anaerobic lagoons with added biological substrates

  Rodolfo Oscar Braun, M V Muñoz, S H Pattacini, G. E. Scoles
• Animal production II abstracts

  Managing Editor
• Animal production I abstracts

  Managing Editor
• Strategic notes on Brazilian beef cattle

  Júlio Otávio Barcellos, Tamara Esteves de Oliveira, Cristiane Soares Simon Marques
• Variance components and repeatability of productive and textil traits of the fiber of Huacaya alpacas (Vicugna pacos) raised in a communal system

  Edgar Carlos Quispe Pena, Rolando Quispe Ramos
• Health and performance of female dairy calves given additional immunoglobulins via a colostrum supplement in combination with high quality maternal colostrum

  Marília Ribeiro de Paula, Carla Maris Machado Bittar, Eduardo de Souza Campos Pinheiro, Felipe Zanforlin Freitas, Tatiana Dalossi
• Dairy production systems of Colombia: challenges and opportunities

  Juan E Carulla, Enrique Ortega
• Lean beef production systems for a growing world

  Susan K. Duckett, B. M. Koch, John G. Andrae
• Trabajos Cortos: Sistemas de Produccion

  Assistant Editor
• Producción Sostenible de Carne y Lana en Sistema Pastoriles: Desafíos y Oportunidades

  F. Montossi, J.M. Soares de Lima, M. del Campo, G. Brito
• La lechería uruguaya en el contexto internacional: competitividad de los sistemas de producción

  Jorge Artagaveytia
• Ganadería de base pastoril: amenaza u oportunidad para Uruguay país agroexportador

  Laura Astigarraga
• Producción porcina en el Uruguay: desafíos y oportunidades

  Hugo Petrocelli, Andrea Gonzalez
• Utilizacion de recursos genéticos en produccion animal en el Uruguay con especial referencia a ovinos

  Raul W Ponzoni, Roberto C Cardellino
• Research to develop nutritional and genetic strategies that optimize the fatty acid content and profile of Uruguayan beef. Review.

  Carolina Eva Realini Cujó, Gustavo Walter Brito, Fabio Montossi
• Zootechnical profile of the dairy farms in southern Minas Gerais State, Brazil

  Fabio Raphael Pascoti Bruhn, Debora Oliveira Daher, Christiane Maria Barcellos Magalhães Rocha, Jonata Melo Barbieri, Juliana Ribeiro Lucci, Antonio Marcos Guimarães
• Quantification of environmental impacts from traditional systems beef cattle production in southern Brazil by a life cycle assessment method

  Marcelo Abreu da Silva, Milene Dick
• Comparing environmental impacts of beef cattle production systems in grassland from Southern Brazil

  Milene Dick, Marcelo Abreu da Silva, Homero Dewes
• Ethno-zootechnical characterization of the population of fiber bearing lamas from the province of Jujuy, Argentina

  Michel Victor Hubert Hick, Eduardo Narciso Frank, Alejandro Prieto, María Flavia Castillo
• Beef cattle production and quantification of carbon emissions: an analysis in Rio Grande do Sul State, Brazil

  Letícia Paludo Vargas, Vicente Celestino Pires Silveira
• Use of robotic cow milking: A review

  Agnelo Franco Franco Neto, Marcos Aurélio Lopes
• Actual situation and prospective of Argentina livestock sector A Regional approach

  Daniel Rearte
• Produccion de Bovinos de leche

  Editor Index
• Produccion de Cerdos

  Editor Index
• Produccion de Aves

  Editor Index
• Produccion de Bovinos para Carne

  Editor Index
• Equinos

  Editor Index
• Sustainability: an updated look to dry matter intake and energy metabolism regulation on dairy cows

  Ayelen Chiarle, M. Sirini, Alejandro Relling
• The impact of R&D in broiler breeding: past, present and future

  Santiago Avendaño
• Importance of the expression and activity of B-carotene 15, 15’ monooxygenase and vitamin A. Its role in animal production. A Review.

  Esperanza García-López, María Ofelia Mora Izaguirre
• Estimation of liveweight from chest circumference in double purpose crossbred calves during growth as a function of sex and racial group in the Maracaibo Lake basin

  Norkelin C. Salazar, Layneth Machado, Omar Araujo-Febres
• Effect of stocking rate on ecological sustainability measured through standardized indicators in a system of outdoor pig production

  Daniel Aldo Campagna, Luciana Dichio, Alfredo Ausilio, Pablo Bessón, Patricia Silvia Silva, Luciano Spinollo
• Comparison of growth curves in male and female goat kids of Saanen and of ⅞ Boer breeding during the suckling phase

  Samuel Figueiredo Souza, Juciléia Aparecida da Silva Morais, Marcos Jácome Araújo, Oscar Boaventura Neto, Roberto Germano Costa, Kleber Tomas Resende, Maria Emília Franco Oliveira, Roberta Machado Ferreira, Izabelle Auxiliadora Molina de Almeida Teixeira
• Wool fiber diameter change in Patagonian Merino ewes moved to the Pradera Pampeana Región

  Ana L. Frey, N Martin, A. De Caro, D. Álvarez Ugarte, M. Elvira
• Assessment of sexual behavior of young rams of Santa Inês breed, with and without prior experience with females

  Aline Pacheco, Celia R. Quirino, Aparecida de Fátima Madella Oliveira
• Evaluation of thermal comfort in a silvipastoral system in a tropical environment

  Lusimar L. G. G. da Silva, Alexander Silva de Resende, Paulo Francisco Dias, Sebastião Manhães Souto, Bruno Campbell de Azevedo, Marcia de Souza Vieira, Aline Alves Colombari, Anatoly Queiroz Abreu Torres, Patricia Morais da Matta, Thaisi Bertoldi Perin, Antonio Franco
• Indexes of primacy in sheep flocks of central Cordoba Province, Argentina

  Michel Hick, Eduardo Narciso Frank, Alejandro Prieto, F. Castillo
• Effect o energy levels in diets of constant energy: protein ratio on performance, metabolism and thyroid hormones of broilers

  Otto Mack Junqueira, Nadja Susano Mogyca Leandro, Marcos Macari, Lucio Francelino Araujo, Cristiane Soares da Silva Araujo
• The effect of calving season on milk production in water buffalo (Bubalus bubalis)

  Guido Bufano, D. Carnicella, Pasquale De Palo, Vito Laudalio, Gaetano V. Celano, Cataldo Dario
• Dual purpose cattle production systems and the challenges of the tropics of Mexico

  Juan G. Magaña-Monforte, G. Rios-Arjona, J. C. Martinez-Gonzalez
• Dual purpose abstracts
• Growth of beef heifers from 7 to 11 months of age

  Eduardo Castro da Costa, Jorge López, Júlio Otávio Barcellos, Gustavo Angel Crudeli
• Milk yield of a Holstein herd in the high area of venezuelan Andes

  J. Suniaga, A. Betancourt, M. Castillo, J. Petit, Fidel Pariacote
• FR 47. Chinchilla (Chinchilla lanigera) body growth in a commercial production, province of Buenos Aires. Argentina

  M. Alvarez, Hector Quintana, G. Mallo, M. E. Quinn
• Formaldehyde protection of syrup off based diets for pigs.Feeding value and nutrient utilization

  Julio Ly, L. J. Blanco, J. Castillo, R. Perez
• An approach to the characterization of english and welsh dairy farmers as to progressiveness and attitude toward computerized information systems

  Magda Maria Guilhermino, I. B. Sampaio
• Calculating economic values for milk components in a pasture-based-dairy-system: the case of Argentina

  L. Pruzzo, Jose Luis Danelon, R. J. Cantet
• Integral farming models for Bahía Blanca and Coronel Rosales, Argentina

  Alfredo Gargano, Miguel Aduriz
• The simulation models. A supporting tool for the livestock management

  Claudio Aguilar, H. Cortes, R. Allende

  226-231
• The investigation of agricultural systems in Latin America. A descriptive model

  Claudio Aguilar, Julia S. Morales

  184-192
• Use of some mathematical models to study the lactation curve of Murrah buffaloes and their crossbreeds under a semi-extensive system in the state of Sao Paulo

  M. Muñoz-Berrocal, H. Tonhati, M. Cerón-Muñoz, J. M. Duarte, R. L Chabariberi
• Perspectives for livestock on grazinglands

  Wolfang Pittroff, T. C. Cartwright, M. M. Kothmann
• Sheep production systems at pasture

  R. Oficialdegui
• Anatomy-histopathologic and ultrastructure of turkey’s testis (Meleagris gallopavo) treated with furazolidone in its diets

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