Animal Production

All Items

• Invited paper Virtual Fencing – A path to precision livestock farming

  Sharl Liebergreen

  583-584
• Invited paper The role of livestock in enhancing agricultural systems: insights from mixed crop-livestock models

  Paulo Cesar de Faccio Carvalho

  851-856
• Invited paper Building a Regional Approach for Sustainable Cattle in the Americas: a first experience in the Southern Cone and Bolivia

  Diego Gauna

  841-844
• Invited paper The key role played by livestock in the ecology of farming systems including the ability to deliver nutritious foods from non-human edible ingredients

  Frank Dunshea

  931-938
• Invited paper A new conceptual model to guide professional action in sustainable animal production system

  Julio Otavio Jardim Barcellos, Tamara Esteves de Oliveira Oliveira, Marcela K Rocha, Giovana Giacomelli, Carolina Decimo

  845-850
• Invited paper Biodiversity in livestock systems: measuring, managing and valuing

  Oscar Ricardo Blumetto Velazco

  339-346
• Invited paper Sustainability in animal production systems: research and implementation in Switzerland and beyond

  Joel Berard

  347-348
• The concentrations of IGF-I, glucose and testosterone in 140-day-old male lambs born to ewes fed a nutritional supplement from day 70 of gestation to term.

  Helen Viotti, Beatriz Mernies, Andrea Fernández, Narine Balemian, Lilena Folgar, Javier Cambruzzi, Paula Lombide, Graeme Martin, Nelida Rodriguez-Osorio, Graciela Pedrana

  839-840
• Application of the GWP* to estimate the contribution to global warming of enteric methane emissions from Uruguayan livestock farming

  Juan Manuel Soares de Lima

  561-562
• Effect of inclusion of brown algae (Durvillaea antarctica) on the productive parameters of pigs.

  Gastón Sepúlveda-Truan, Alex Muñoz, Isabela Perez-Nuñez , Natalia Rebolledo, John Quiñones, Nestor Sepulveda

  367-368
• Milk production and solids composition in Holstein cows under different feeding strategies in intensive production systems

  Maria Noel Mendez Pereira, Andrea Garay, Maximiliana Muniz, Esteban Krall, Santiago Jorcin, Edinson Bejarano, Ignacio Vieitez, Tomás López-Pedemonte, Lucía Grille

  555-556
• Cattle performance in natural pastures of the Pampas in years with climatic anomalies due to the ENSO phenomenon

  Luciano Pinto Marques, Bárbara Centeno, Anelise Pereira Hundertmarck, Carolina Bremm, Pedro Arthur De Albuquerque, Paulo C. de Faccio Carvalho

  553-554
• Effect of temporarily reducing milking to once a day on milk production in Holstein dairy cows

  Micaela Rodano Rivero

  541-542
• Evolution of litter quality on the degree of footpad and skin lesions in broiler chickens

  Sebastián Brambillasca

  335-336
• Peak milk production and lactation duration of Sindi P.O cows in the Cerrado biome

  Júlia Carvalho de Melo, Isabel Cristina Ferreira, Adriano Queiroz de Mesquita, Carlos Frederico Martins

  1001-1002
• Crossbreeding parameters in a rotational scheme between Corriedale and Dohne Merino sheep: effects on wool production and live weight in ewe hoggets

  Washington Bell

  527-528
• Average weight and daily gain of ½ Sindi ½ Montbéliard calves in the rearing phase in the Cerrado Biome

  Júlia Carvalho de Melo, Alvimara Felix dos Reis, José Ricardo Sobral da Silva, Carlos Frederico Martins, Adriano Queiroz de Mesquita, Isabel Cristina Ferreira

  531-532
• Productive performance of purebred Highlander lambs and those crossed with the Dorper breed: preliminary results

  Ana Laura Sánchez, Washington Bell

  529-530
• Morphometric measurements of crossbred calves ½ Sindi ½ Montbéliard up to 113 days of age Português

  Isabel Ferreira, Julia Carvalho de Melo, Carlos Frederico Martins, Alvimara Felix dos Reis, Adriano Queiroz de Mesquita

  525-526
• Solute carrier transporters in bovine ocular squamous cell carcinoma (BOSCC)

  Nariné Balemian, Tamara Fernández-Calero, Eileen Armstrong, Graciela Pedrana

  329-330
• Incorporation of chia seeds into the diet of grazing Pampa Rocha pigs: bioactive peptide and mineral content in fresh pork shoulder

  Cecilia Carballo

  999-1000
• Cattle farming in Latin America: enteric methane and main emitting countries

  Carolina Lizarralde, Laura Astigarraga

  941-942
• Trajectories of change in economic and productive indicators and in producer practices, based on a longitudinal analysis of three co-innovation cycles in livestock systems on natural grasslands in Uruguay.

  Varinia Figueroa Sturini, Pablo Soca, Ignacio Paparamborda

  909-910
• Correlation between weight and body measurements in ½ Sindi ½ Montbéliard calves

  Isabel Ferreira, Julia Carvalho de Melo, Alvimara Felix dos Reis, Sara Adna Santos de Oliveira, Adriano Queiroz de Mesquita, Carlos Frederico Martins

  523-524
• Models for predicting saleable meat in steer slaughter

  Mario Lema, Diego Gimeno

  977-978
• Ecological intensification applied in a family livestock production system on natural land based on an input-based production approach – Case study

  Marcello Adolfo Martinelli Varela, Luisina Torres, Ignacio Paparamborda

  915-916
• Assessment of Environmental Footprints in Pasture-Based Dairy Systems with Different Levels of Intensification

  Cecilia Loza Acosta, Lucía Gil Zibil, José Ignacio Gere, Pablo Chilibroste Simonds, María Paz Tieri

  519-520
• Broad bean pods as a sustainable alternative for controlling ovine coccidiosis: evaluation of antiparasitic efficacy

  Cyntia Airagna Fortes dos Santos, Andressa Carvalho de Sousa, Nítalo André Farias Machado, Thalia Caldas da Silva, Joana Kellany Goncalves de Andrade, Gabrielle de Melo Oliveira, Henrique Nunes Parente, Ivo Alexandre Leme da Cunha

  327-328
• Relationship between live weight and robustness in Holstein cows: productive, reproductive, and health analysis in a mixed dairy grazing system

  Mariel Regueiro, Ana Ines Trujillo, Alejandra Jasinsky, Clara Panissa, Ana Laura Astessiano, Ezequiel Jorge Smeding

  981-982
• Estimation of the population density of white-tailed deer (Odocoileus virginianus mexicanus) in three UMAs of the Sierra de Huautla

  Laura Karen Trejo Arista, Enrique Cortés Díaz, Giovany Tonatiuh González Bonilla, Aarón Alejandro Molho-Ortiz

  513-514
• Forage consumption and grazing strategy of breeding cows in response to changes in natural field structure

  Fernanda Dupuy, Cristina Genro, Ignacio Paparamborda, Martin Claramunt, Martin Do Carmo, Pablo Soca

  803-804
• The inclusion of legumes in sheep diets and its effect on forage consumption and methane emissions

  María Abud Clariget, Hugo Naya, Jean Savian, Diego Giorello, Taciara Lima de Arruda, Gabriel Ciappesoni, Elly Navajas, Ignacio de Barbieri

  799-800
• Biopulp as a functional food: a safe mineral source from fruit and vegetable waste in a circular economy approach

  Cecilia Carballo

  939-940
• Grazing management as a key tool to increase animal production in natural fields

  Jean Savian, Fernanda Bentancur Coppetti

  507-508
• Relationship between available soil water and the economic and productive performance of livestock systems on grasslands under different climatic scenarios

  Luisina Torres, Ignacio Paparamborda, Pablo Soca

  907-908
• Communication strategy for adding environmental value to livestock farming

  Joaquín Lapetina

  861-862
• Macrominerals in tank milk: seasonal variations and their impact on coagulation properties in ten artisanal cheese factories in the Uruguayan dairy basin.

  Ignacio Alcántara, Mauricio Calvo, Gabriela Banega, Sebastián Andrade, Jennifer Melendrez, Victor González, Nicolle Pomiés, Alvaro Gonzalez Revello

  107-108
• Multi-agent modeling of a heated bed dairy system to analyze nitrogen, phosphorus, and potassium accumulation

  María Belén López Pérez, Francisco Dieguez, Alsiane Capelesso

  791-792
• The intercropping of grasses and legumes increases nutrient availability for grazing beef cattle: evaluation of three pasture-finishing systems

  Althieres José Furtado, Rolando Pasquini Neto, Jaqueline Fernandes Bruno, Letícia Cássia da Silva, Matheus Sousa de Paula Carlis, Mariana Nunes Vieira de Melo, Flavio Perna Junior, Luiza Budasz de Andrade, Wilfredo Manuel Rios Rado, Ramos Jorge Tseu, Patrícia Perondi Anchão Oliveira, Paulo Henrique Mazza Rodrigues

  503-504
• Optimization of tropical pastures for sustainable beef cattle finishing: fertilization or intercropping of grasses and legumes

  Althieres José Furtado, Rolando Pasquini Neto, Jaqueline Fernandes Bruno, Letícia Cássia da Silva, Matheus Sousa de Paula Carlis, Mariana Nunes Vieira de Melo, Flavio Perna Junior, Luiza Budasz de Andrade, Wilfredo Manuel Rios Rado, Ramos Jorge Tseu, Patrícia Perondi Anchão Oliveira, Paulo Henrique Mazza Rodrigues

  499-500
• Preliminary study of the effect of Durvillaea antarctica on the ovine intestinal microbiome.

  John Quiñones Diaz, Rommy Díaz, Rodrigo Huaiquipan, Ailin Martinez, Matias Cortes, Nestor Sepúlveda

  775-776
• Strategies and perceptions of family livestock farming in southern Uruguay in the face of the 2020–2023 drought

  Guidahí Parrilla González, Laura Bruzzone, Maximiliano Piedracueva, Andrea González, Marcello Martinelli, Ismael Ibarra

  903-904
• Exploring the resilience and productive performance of grazing Holstein cows under an automatic milking system

  Ana Ines Trujillo Lezama

  973-974
• Natural shade access can attenuate heat stress: physiological responses in the dry period and carry-over effects on subsequent lactation

  María Victoria Pereira-Bernasconi, Celmira Saravia, Carlos Batista, Ezequiel Jorge-Smeding, Richard Möller, Maximiliano Cedrés, Laura Astigarraga, Ricardo Rodriguez-Palma, Andrea Alvarez-Oxiley

  289-290
• A suplementação de magnésio em borregos terminados aos pés das suas mães diminui a resposta ao stress pré-abate ao afetar a temperatura muscular e o pH post-mortem?

  Jimena Fernandez, Daniela Cauriaga, Messy Hannear de Andrade Pantoja, Alejandro Bielli, Florencia Silva, Aline Freitas de Melo, Javier Ithurralde

  281-282
• Heat production of beef heifers in silvopastoral systems

  Ana Clara Giribaldi, Martina Vicino, Federica Marin, Belén Morales, Mauricio Cáceres, Carolina Viñoles, Mariana Carriquiry

  467-468
• Genetic variability of body condition in cows at first weaning and its relationship with carcass characteristics measured by ultrasound in Angus cattle.

  Micaela Botta, Ana Carolina Espasandin, Olga Ravagnolo

  465-466
• Morphometric clustering of peruvian creole goats suggests divergence linked to farm origin rather than dry forest ecosystem

  Jose Antonio Haro-Reyes, Emmanuel Alexander Sessarego, Juancarlos Alejandro Cruz-Luis

  463-464
• Is a 45-day voluntary waiting period a strategy for any herd?

  Edgar Alain Collao-Saenz, Lana Oliveira Plassa

  891-892
• Indicators for diagnosing the environmental dimension in family pig production farms

  Andrea González, Amabelia del Pino, Varinia Figueroa, Ana Alonso

  889-890
• Preliminary Evidence of Heat Stress Effect on Placentome Morphometry in Beef Cows

  Carlos Batista, Florencia Presentado, Victoria Pereira, Celmira Saravia, Richard Möller, Elize van Lier, Ricardo Rodríguez-Palma, Gimena Silvestri, Andrea Alvarez-Oxiley

  265-266
• Effect of a zeranol implant on the productive performance, carcass yield and carcass characteristics of Brahman bulls

  Carlos Mario Campos-Granados, Roger Molina-Coto, Ronny Vargas-Blanco, Claudio Pereira-Vargas

  77-78
• Evaluation of the effect on Rhipicephalus microplus tick counts in Holstein steers treated with the natural additive Factor P.

  Lauriston Fernandes, Luis Ferreira, Wellington Araujo, Ricardo Andrade, Renan Bin, Rafael Paranhoz, Isabel Santos

  263-264
• Bioeconomic modeling of cattle breeding systems: sensitivity analysis and production scenarios in native grasslands of Paraguay

  Diego Avilio Ocampos Olmedo

  971-972
• Bovine carcass quality by sex and conformation: a comprehensive analysis in Paraguay

  Diego Avilio Ocampos Olmedo

  71-72
• Physicochemical composition of milk from dual-purpose cows in the northeastern Sierra region of Puebla, Mexico

  Ethel Caterina García y González

  67-68
• Degradability and in situ ruminal kinetics of diets with forage corn silage (Zea mays) and green banana residues (Musa paradisiaca) for tropical sheep

  Pascual Espinoza

  729-730
• Feeding behavior of lambs under intermittent suckling management and fed with three crude protein levels in the total mixed ration

  Julia Almeida Cruz, João Victor Ferreira Machado, Antonio Carlos Polonio, Thiago Henrique Guidelli, Fernando Luiz Massaro Junior, Sergio Rodrigo Fernandes, Fernando Augusto Grandis

  253-254
• Expression of TPH1 and 5-HTR4 in epithelial cells of the duodenum and jejunum of Chihuahua Criollo cattle

  Ruth Lizbeth Armendáriz-Rivas, Agustín Corral-Luna, Francisco Joel Jahuey-Martínez, Adrian Omar Maynez-Perez, José Alfredo Martínez-Quintana, Monserrath Felix-Portillo

  247-248
• Ewe performance under intermittent suckling management and three crude protein levels in the total mixed ration provided to lambs

  Geovana Sartori, Antonio Carlos Polonio, Giovana Camila Silva, Mikaela de Barros Hiromori, Leandro Tamashiro Oda, Fernando Luiz Massaro Junior, Fernando Augusto Grandis, Sergio Rodrigo Fernandes

  703-704
• Intravenous Glucose Tolerance Test Reveals Altered Glycemic Response in Dairy Cows with Metritis

  Manoela Furtado, Maurilio Solorio Ochoa, Isadora Born, Yamila Pérez Gil, Laura Antunes de Souza Nogueira, Juliano Peres Prietsch, Leonardo Marins, Karen Freitas, Thaís Casarin da Silva, Rodrigo de Almeida, Eduardo Schmitt, Alejandro Mendoza, Eliza Rossi Komninou, Gustavo Desire Antunes Gastal, Marcio Nunes Corrêa

  231-232
• Effect of Andiroba oil (Carapa guianensis Aublet) on weight performance and morphometric measurements of sheep

  Janaira Cristina Silva de Souza, João Kalil de Sousa Cavalcante, Ester Chipaia de Souza, Wanderson da Silva Lopes, Ana Sylvia Gomes dos Santos, Mayana Penha Souza Costa, Jefferson Rodrigues Gandra, Érika Rosendo de Sena Gandra

  449-450
• Hematological response of nursery piglets supplemented with probiotics

  Janaira Cristina Silva de Souza, Maria Eduarda Santos Mendes Espíndola, Graziella Nunes de Oliveira Rodrigues, Layne Gabrielly de Almeida Oliveira, Rejane dos Santos Sousa, Jefferson Rodrigues Gandra, Joana Patrícia Lira de Sousa, Érika Rosendo de Sena Gandra

  233-234
• Fecal metabolites associated with feed efficiency and methane emission in Nellore cattle

  Karine Daenquele Silva Pinto, Jessica Moraes Malheiros , Luis Fernando Carneiro de Araújo, Letícia Del Fiume Lemes Pompolim, Joel Alves da Silva, Tainara Luana da Silva Soares, Viviane Andrade Ligori, Marina Alves Silva, Luiz A Conalgo, Wellison Jarles da Silva Diniz, Maria Eugênia Zerlotti Mercadante

  435-436
• Glucose Infusion Modulates Hematological Parameters in Postpartum Dairy Cows With and Without Clinical Metritis

  Manoela Furtado, Yamila Perez Gil, Maurilio Solorio Ochoa, Ana Clara Trindade Rodrigues, Emilia Hohgraefe, Laura Valadão Vieira, Thaís Casarin da Silva, Maria Amélia Agnes Weiller, Eduardo Schmitt, Fabio Celidonio Pogliani, Lisandre de Oliveira, Alejandro Mendonza, Eliza Rossi Komninou, Gustavo Desire Antunes Gastal, Marcio Nunes Corrêa

  193-194
• Estimates of genetic parameters of enteric methane emission per day of collection in Nellore cattle

  Fabieli Loise Braga Feitosa, Joel Alves da Silva, Julia de Paula Soares Valente, Lúcio Flavio Macedo Mota, Laura Beatriz da Costa Pereira, Lucia Galvão de Albuquerque , Maria Eugênia Zerlotti Mercadante

  433-434
• Variability in body condition score and reproductive parameters associated with calving season in pastoral dairy systems in Uruguay

  Karen Cruz Freitas, Diego Ubios, Alejandro Mendoza, Gustavo Gastal

  427-428
• Influence of type of delivery on mortality of lambs up to weaning

  Andreza Bordim de Oliveira, Matheus Spiniella Avelino, Isabelle Cristina da Silva Fernandes, Mônica Machado Barbosa, Graziela Zacariotto Sussai, Ana Vitoria Reis Silva, Luis Fernando Carneiro Araújo, Ricardo Lopes Dias da Costa

  213-214
• Influence of ewe body condition score at lambing on lamb weight at birth and weaning

  Andreza Bordim de Oliveira, Matheus Spiniella Avelino, Isabelle Cristina da Silva Fernandes, Mônica Machado Barbosa, Graziela Zacariotto Sussai, Ana Vitoria Reis Silva , Luis Fernando Carneiro Araújo, Ricardo Lopes Dias da Costa

  209-210
• Effect of feed conversion efficiency on the reproductive performance of Hereford females in extensive systems

  Thais Devincenzi, Mario Lema, Pablo Cuadro, Elly Navajas

  677-678
• Growth trajectories of Braford calves and their effect on reproductive development

  Thais Devincenzi, Juan Andrés Dufort, Martin Sorondo, Graciela Quintans

  675-676
• Evaluation of extant models for predicting methane emissions in sheep fed forage from Campos Rangeland

  Oluwagbemiga A. Dada, Maguy Eugène, Ana Ines Tafernabery, Jean Victor Savian, Ignacio De Barbieri, Martin Jaurena, Thais Devincenzi

  959-960
• Evolution of live weight from birth to weaning of calves from primiparous Criollo Uruguayo cows and its comparison with Hereford

  Cristian Carrillo, Eileen Armstrong, Juan Safi, Martin Claramunt

  399-400
• Effect of fibrolytic exogenous enzymes used in high forage diets of lactating Rambouillet ewes

  Héctor Aarón Lee-Rangel, German D Mendoza Martínez, Anayeli Vázquez Valladolid, Jose Alejandro Roque Jimenez

  665-666
• Main causes of the annual culling of female bovine and their bioproductive implications in specialized dairy farms in Panama

  Ingrid Saldaña, Edil E. Arauz, Neftali Aparicio, Reinaldo de Armas

  201-202
• Perenniality enhances soil biological function in U.S. farming systems

  Maria Soledad Orcasberro, Kim Cassida, John Guretzky, Marisol Berti, Carol Williams, Priscila Pinto, Valentin Picasso

  953-954
• Comparison of two enteric methane measurement techniques in pasture-based dairy systems

  Joaquina Fernandez, Mariana Carriquiry, Hugo Naya, Alejandro La Manna, Cecilia Loza

  957-958
• Integrating rumen microbiome profiles to predict feed efficiency and methane emissions in Hereford beef cattle

  Pablo Peraza, Guillermo Martínez-Boggio, Hugo Naya, José Sotelo-Silveira, Elly Ana Navajas

  1007-1008
• Relationship between productive indicators, liver function, and ovarian activity in dairy cows

  Arturo Fuentes, Carolina Bespalhok Jacometo, José Isaac Norato Arroyo, Samantha A. Martínez Santiago

  637-638
• Reactivity is associated with greater subcutaneous fat deposition in young Canchim bulls

  Mônica Machado Barbosa, Matheus Vargas , Viviane Andrade Ligori , André Crespilho , Giovanna Lemos Lazarini, Graziela Sussai, Isabelle Fernandes, Andreza Bordim de Oliveira, Ana Vitoria Reis Silva, Fábio Morato Monteiro , Joel Alves da Silva

  171-172
• Predominant housing systems in the 20 largest dairy farms in Brazil

  Marina Fortes, Samela da Silva, Edgar Alain Collao-Saenz

  865-866
• Quota 481: Main Variables in the Cattle Feedlot Business in Uruguay

  Sebastían Frade, Gonzalo Fernández Turren, Francisco Dieguez

  17-18
• Performance and carcass characteristics of feedlot lambs fed different levels and sources of phosphorus

  Nicoly Leon Brun, Thainara Tintori Falcão, Ariolino Moura de Oliveira Neto, Roberta de Lima Valença, Rafael Assis Torres de Almeida, Rodrigo de Nazaré Santos Torres, Marco Tulio Costa Almeida

  31-32
• Assessment of Production and Health of Dairy Cows in Confinement Systems in the Southern Region of Espírito Santo, Brazil

  Ueldiane Quintiliano Lins, Aparecida de Fátima Madella de Oliveira, Roberta de Lima Valença, Rafael Assis Torres de Almeida, Marco Tulio Costa Almeida

  149-150
• Sustainable poultry production: reducing the environmental footprint of eggs in the context of climate change

  Liliana Marquez Benavides

  943-944
• An approach to some characteristics of Dual-Purpose Livestock Farming in Venezuela at the beginning of the third decade of the 21st century

  Gustavo Enrique Nouel-Borges

  949-950
• Nutritional and economic evaluation of black soldier fly (Hermetia illucens) larvae in broiler chicken diets in a community-based model Larvas de Hermetia illucens en pollos de engorde

  Laura Priscila Moreno, Liliana Lucía Betancourt López, Katherine Y. Barragán-Fonseca, Karol Bibiana Barragán-Fonseca

  107-122
• Sustainability index approach of the Paraguayan Chaco dry biome in Integrated systems of animal production (ISAP).

  Diego Avilio Ocampos Olmedo, Pedro Luís Paniagua Alcaraz

  73-82
• 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
• In vitro digestibility of six supplements including forage trees from the Amazonian foothills

  Adrian Rolando Riascos Vallejos, Rafael Rodríguez Hernández, Diana Patricia Vargas Muñoz

  23-31
• 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