Results 61 to 70 of about 124,743 (197)

Genetic Relationships Between Residual Gain and Economically Important Traits in Nellore Cattle

Journal of Animal Breeding and Genetics, Volume 143, Issue 5, Page 658-666, September 2026.
ABSTRACT Sustainable beef production requires identifying animals with superior feed efficiency to reduce environmental impact and production costs. This study aimed to estimate heritability and genetic correlations between residual gain (RG) and growth, reproductive, carcass and feed efficiency traits in Nellore cattle.
Miller Teodoro, Gabriel Gubiani, Letícia Pereira, Amanda Santos Gubiani, Angélica Simone Cravo Pereira, Roberto Sainz, Cláudio Ulhôa Magnabosco, Fernando Baldi   +7 more
wiley   +1 more source

Plasma Pharmacokinetic Profile of Fipronil 1% Pour‐On in Cattle: Photodegradation and the Sustained Systemic Persistence of Fipronil Sulfone

Journal of Veterinary Pharmacology and Therapeutics, Volume 49, Issue 5, Page 515-524, September 2026.
ABSTRACT This study characterized the long‐term pharmacokinetic profile of a 1% fipronil pour‐on formulation in Nellore bulls under field conditions. Seventeen animals received a single topical dose (1 mg/kg), and plasma concentrations of fipronil and its metabolites (sulfone and desulfinyl) were monitored for 175 days using LC–MS/MS.
Stefani Maria Ferreira, Leonila Ester Reinert Raspantini, Giselle Kindlein, Fabiano Barreto, Caroline Andrade Tomaszewski, Tamara dos Santos Castilhos, Daniel Rodrigo Hillesheim, Silvana Lima Górniak, André Tadeu Gotardo   +8 more
wiley   +1 more source

Bos taurus contribution in Nellore (Bos indicus) breed.

, 2002
A espécie Bos indicus, particularmente a raça Nelore, é grande maioria no rebanho bovino da região acima do trópico no Brasil. Embora a habilidade desses animais em resistir às doenças parasitárias, condições climáticas e pastagens de baixa qualidade ...
Paula Ripamonte, Ripamonte, Paula
core   +1 more source

Long‐term changes in functional diversity and its implications for mammalian conservation and ecological restoration in a grassland ecosystem

Functional Ecology, Volume 40, Issue 8, Page 2379-2391, August 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Paleontological data provide information on natural environments prior to human influence, which are useful for tracking changes in ecosystem functioning through time. During the Late Pleistocene, about 10% of terrestrial mammalian species were extinct in South America.
Thayara S. Carrasco, Catalina Pimiento, Tiago B. Quental, Pedro L. Godoy   +3 more
wiley   +1 more source

Mitochondrial control region genetic diversity and maternal ancestry of a Brangus-Ibage cattle populations

Genetics and Molecular Biology, 2005
The genetic diversity of 277 nucleotides in the mitochondrial DNA control region (nt 15,964 to 16,240 in reference sequence) was analyzed in crossbreed beef cattle (Brangus-Ibage, 5/8 Bos primigenius taurus x 3/8 Bos primigenius indicus) as well as in ...
Luiz Ernani Henkes, Wilson Araújo Silva Jr, José Carlos Ferrugem Moraes, Tania Azevedo Weimer   +3 more
doaj   +1 more source

Coding and Noncoding Uterine Small Extracellular Vesicle Content Differs in the Early Stages of Pregnancies Produced by Artificial Insemination and In Vitro Fertilization in Cattle

Molecular Reproduction and Development, Volume 93, Issue 7, July 2026.
ABSTRACT Establishing a successful pregnancy relies on effective communication between the mother and fetus. Small extracellular vesicles (sEVs) are pivotal in facilitating intercellular communication, transferring messenger RNA (mRNA), noncoding RNA (ncRNA), and proteins. Considering the prevalence of in vitro fertilization (IVF) in bovine production,
Amanda de Oliveira Furlan, Alessandra Bridi, Jéssica Nora Drum, Liza Margareth Medeiros de Carvalho Sousa, Mariana Cordeiro Almeida, Juliana de Souza Felix, Luana Araujo Zutin, Isabelle Alexandrino dos Santos, Flávia Regina Florencio de Athayde, Natália Francisco Scaramele, Camila Azzolin de Souza, Paula de Carvalho Papa, Juliano Coelho da Silveira, Roberto Sartori Filho, Danila Barreiro Campos, Flavia Lombardi Lopes   +15 more
wiley   +1 more source

The application of geometric morphometric analysis in the study of bovine ovarian morphology

Theoretical and Applied Veterinary Medicine
Geometric morphometrics offers superior analytical capabilities compared to traditional linear morphometry for studying biological shape variation. The bovine ovary serves as an excellent model due to its distinct features and morphological plasticity ...
M. A. Fares, D. E. Rahmoun
doaj   +1 more source

Asymmetrical Steps: Osteomorphological and Metric Patterns of Cattle Phalanges to Determine Anatomical Position

International Journal of Osteoarchaeology, Volume 36, Issue 4, Page 1013-1025, July/August 2026.
ABSTRACT This study presents a reproducible framework for identifying the anatomical position of cattle phalanges, integrating both morphological and osteometric approaches for application to modern and zooarchaeological assemblages. The dataset comprises 1853 phalanges from 106 individuals with known and unknown phalangeal position representing ...
Audrey Crabbé, Willemien de Kock, Canan Çakırlar   +2 more
wiley   +1 more source

Quantitative trait locus affecting birth weight on bovine chromosome 5 in a F2 Gyr x Holstein population

Genetics and Molecular Biology, 2005
Segregation between a genetic marker and a locus influencing a quantitative trait in a well delineated population is the basis for success in mapping quantitative trait loci (QTL). To detect bovine chromosome 5 (BTA5) birth weight QTL we genotyped 294 F2
Gustavo Gasparin, Marcelo Miyata, Luiz Lehmann Coutinho, Mário Luiz Martinez, Marcos Vinícius G. Barbosa da Silva, Marco Antônio Machado, Ana Lúcia Campos, Luciana Correia de Almeida Regitano   +7 more
doaj   +1 more source

Status of On‐Farm Artificial Insemination Services and Effectiveness of Oestrus Synchronization in Dairy Cattle Under Small‐Scale Dairy Farming System

Veterinary Medicine and Science, Volume 12, Issue 4, July 2026.
Cross‐sectional survey and retrospective data on the oestrus synchronization were collected and analysed. The predominant mating system practiced by dairy farmers was AI (55.6%), and 73.5% of farmers apply controlled mating. The highest response rate and pregnancy rate were 89.5% and 45.2%, respectively, whereas a birth rate of 9.6%–18.5% was obtained.
Temesgen Milkias, Chencha Chebo, Alemayehu Worku   +2 more
wiley   +1 more source