Results 71 to 80 of about 2,606 (160)

Eficiência de utilização de nutrientes em novilhas das raças Canchim e Nelore e cruzadas Canchim-Nelore [PDF]

open access: yesRevista Brasileira de Zootecnia, 1999
O objetivo deste trabalho foi estudar a eficiência de utilização de nutrientes por novilhas em crescimento das raças Canchim (CA) e Nelore (NE) e 1/2 Canchim + 1/2 Nelore (CANE) em três dietas: mantença, relação volumoso:concentrado: (RVC) de 75:25 (Teste 1); dieta para ganhos de 700 g/animal/dia, RVC de 60:40 (Teste 2); e dieta para ganhos de 1200 g ...
Manzano, Airton   +4 more
openaire   +3 more sources

Genetic Parameters of Resilience Indicators Across Growth in Beef Heifers and Their Associations With Weight, Reproduction, Calf Performance and Pre‐Weaning Survival

open access: yesJournal of Animal Breeding and Genetics, Volume 143, Issue 1, Page 79-91, January 2026.
ABSTRACT In tropical extensive beef cattle systems, heifers raised on pasture are exposed to various environmental challenges that affect their growth and reproductive performance during the first breeding. Resilience indicators derived from deviations in longitudinal traits can quantify the magnitude of these challenges and the ability of an animal to
Gustavo R. D. Rodrigues   +11 more
wiley   +1 more source

Análise de sensibilidade da margem bruta da receita e dos custos do confinamento de diferentes grupos genéticos Gross margin sensitivity analyses of the income and costs of feedlot for different genetic groups

open access: yesArquivo Brasileiro de Medicina Veterinária e Zootecnia, 2005
Análises de sensibilidade da margem bruta foram realizadas com dados de desempenho e custos de 149 animais confinados por períodos variáveis de acordo com acabamento de carcaça dos grupos genéticos: Nelore sobreano, Nelore desmamado, ½ Valdostana ½ ...
I.C. Ferreira   +8 more
doaj   +1 more source

In vitro embryo production in Nelore cows supplemented with calcium salts of long-chain fatty acid

open access: yesSemina: Ciências Agrárias, 2020
This study was performed to evaluate the effects of supplementation of lactating Nelore cows with calcium salts of long-chain fatty acids (Ca-LCFA) of soybean oil on in vitro oocytes competency, cleavage rate, embryo production rate, pregnancy rate, and ...
Moacir Rogério de Souza   +7 more
doaj   +1 more source

Fertility of Crossbred Dairy Cattle After Progesterone‐Supplemented Co‐Synch in Southwestern Ethiopia

open access: yesVeterinary Medicine International, Volume 2026, Issue 1, 2026.
In Ethiopia, the reproductive efficiency of dairy cattle utilizing artificial insemination (AI) is low, and implementing estrus and ovulation synchronization protocols could enhance the efficiency. Therefore, this study was designed to evaluate the effect of progesterone (P4) supplementation during Co‐Synch on estrus response (ER) and pregnancy per AI (
Aregaw Abera Dodicho   +3 more
wiley   +1 more source

Estimating Linkage Disequilibrium and Effective Population Size Across Generations in Holstein Cattle

open access: yesVeterinary Medicine and Science, Volume 11, Issue 6, November 2025.
This study reveals a significant historical decline in effective population size (Ne) in Holstein cattle due to intensive breeding, with recent stabilization reflecting improved genetic management. Maintaining genetic diversity is vital for sustainable dairy cattle breeding programs.
Ronak Salehi   +3 more
wiley   +1 more source

Utilizing Indigenous Animal Genetic Resources—Based on Research Into Indigenous Cattle Breeds in the Basque Country in Northern Spain and Indigenous Pig Breeds in Vietnam

open access: yesAnimal Science Journal, Volume 96, Issue 1, January/December 2025.
ABSTRACT Biodiversity, climate change, and food security are closely related and increasing worldwide concerns. Therefore, sustainable productivity and changes to the livestock industry are required for the maintenance or amelioration of the global environment and the future of humanity.
Masaaki Taniguchi
wiley   +1 more source

Transcriptome Analysis Revealed the Affecting Mechanism of Two Diets, Trash Fish or Compound Feed, on Flesh Quality of Largemouth Bass (Micropterus salmoides)

open access: yesAquaculture Research, Volume 2025, Issue 1, 2025.
This study revealed the affecting mechanism of trash fish (TF) and compound feed (CF) on the flesh quality of largemouth bass (Micropterus salmoides) based on muscle transcriptome. Largemouth bass weighing 75.0 ± 0.1 g were given TF or CF for a period of 12 weeks. The CF group presented significantly higher feed efficiency (FE) than the TF group (p < 0.
Min Feng   +5 more
wiley   +1 more source

AVALIAÇÃO DAS VÍSCERAS DE NOVILHOS NELORE E F1 NELORE X SINDI AOS 36 E 48 MESES DE IDADE

open access: yesCiência Animal Brasileira, 2007
Objetivou-se com esta pesquisa avaliar o peso das vísceras de novilhos de dois grupos genéticos. Utilizaramse dezesseis machos castrados, sendo oito bovinos Nelore e oito F1 Nelore x Sindi com 36 e 48 meses de idade, confinados em baias separadas.
Dorival Pereira Borges da Costa   +5 more
doaj   +1 more source

Estrutura populacional da raça Nelore Mocho

open access: yesArquivo Brasileiro de Medicina Veterinária e Zootecnia, 2002
Descreveu-se a estrutura populacional da raça Nelore Mocho utilizando dados do registro genealógico de animais nascidos entre 1969 e 1998. O banco de dados foi separado em quatro períodos de 1979-1983, 1984-1988, 1989-1993 e 1994-1998. Calcularam-se as estatísticas descritivas do número de criadores, de reprodutores e de reprodutrizes.
Faria, F.J.C.   +3 more
openaire   +4 more sources

Home - About - Disclaimer - Privacy