Results 41 to 50 of about 12,697 (209)

A New Siamese Network Loss for Cattle Facial Recognition in a Few-Shot Learning Scenario

open access: yesAgriEngineering
This study explores the use of a Siamese neural network architecture to enhance classification performance in few-shot learning scenarios, with a focus on bovine facial recognition.
João Porto   +8 more
doaj   +1 more source

Desempenho de bezerros da raça Nelore e cruzados desmamados recebendo concentrado em pastagem adubada de Cynodon dactylon cv. Coastcross Performance of weaned Nelore and crossbred calves grazing Cynodon dactylon cv. Coastcross fertilized pastures supplemented with concentrate

open access: yesRevista Brasileira de Zootecnia, 2009
Em três anos de pesquisa, avaliou-se o desempenho de bezerros desmamados de quatro grupos genéticos (Nelore; Canchim × Nelore; Angus × Nelore; e Simental × Nelore) em pastagem de Cynodon dactylon, cv.
Geraldo Maria da Cruz   +5 more
doaj   +1 more source

Caracterização fenotípica de vacas F1 Holandês x Zebu de diferentes bases maternas [PDF]

open access: yesArquivo Brasileiro de Medicina Veterinária e Zootecnia, 2020
RESUMO Caracterizaram-se fêmeas F1 Holandês x Zebu de diferentes bases maternas quanto às pelagens, despigmentações e características morfométricas. Foram utilizadas 266 fêmeas F1, progênies do cruzamento de 26 touros da raça Holandesa com fêmeas de ...
A.F. Reis   +7 more
doaj   +1 more source

Ingestive behavior of Nellore cows and their straightbred or crossbred calves Comportamento em pastejo de vacas Nelores amamentando bezerros Nelores ou mestiços Simental × Nelore

open access: yesRevista Brasileira de Zootecnia, 2010
This trial aimed to investigate the influence of calf genetic group on the ingestive behavior of Nellore dams and their offspring on pasture. Twenty one primiparous and multiparous Nellore cows were assigned to the experiment; 13 cows nursed straightbred Nellore calves; and eight cows nursed halfbred Simmental × Nellore calves.
Fernando Miranda de Vargas Junior   +4 more
openaire   +2 more sources

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

open access: yesJournal 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   +8 more
wiley   +1 more source

PSXIV-9 Effect of fiber level on the performance of Nelore and ½ Angus-Nelore cattle.

open access: yesJournal of Animal Science
Abstract Diets with high grain inclusion have become increasingly common in Brazilian feedlots. Data from our laboratory (Caetano et al., 2015) demonstrated that the feed intake of purebred Nelore cattle was maximized only at fiber levels above 11% neutral detergent fiber from forage (fNDF).
de Souza, Mailza G Gonçalves   +8 more
openaire   +2 more sources

Efeitos ambientais que afetam o ganho de peso pré-desmama em animais Angus, Hereford, Nelore e mestiços Angus-Nelore e Hereford-Nelore [PDF]

open access: yesRevista Brasileira de Zootecnia, 2003
Foram utilizados dados de 66.035 animais das raças Nelore, Hereford, Angus e mestiços Nelore x Angus e Nelore x Hereford, para avaliar a influência da idade da vaca, idade do bezerro e data juliana de nascimento sobre o ganho médio diário dos bezerros no período pré-desmama (GMD).
Teixeira, Rodrigo de Almeida   +1 more
openaire   +6 more sources

Genetic polymorphisms related to meat traits in purebred and crossbred Nelore cattle Polimorfismos genéticos relacionados às características da carne em bovinos Nelore puros e cruzados

open access: yesPesquisa Agropecuária Brasileira, 2009
The objective of this work was to estimate the allelic and genotypic frequencies of CAST/XmnI, a calpastatin gene polymorphism, and CAPN530, a calpain 1 large subunit gene polymorphism, in different beef genetic groups (Nelore and Nelore x Bos taurus ...
Rogério Abdallah Curi   +7 more
doaj   +1 more source

Methodological Determinants of Grayscale Pixel Intensity in Ram Testicular Ultrasonography: Effects of ROI Placement and Imaging Plane Across Age Groups and Two Reproductive Periods

open access: yesReproduction in Domestic Animals, Volume 61, Issue 8, August 2026.
ABSTRACT Testicular ultrasonography is increasingly used in ram breeding soundness evaluations, yet methodological standardization of quantitative grayscale image analysis remains limited. The primary objective of this study was to determine the effects of region‐of‐interest (ROI) placement and imaging plane on testicular parenchymal numerical pixel ...
Bülent Bülbül   +3 more
wiley   +1 more source

Desempenho e viabilidade econômica de novilhos em semi confinamento a pasto no Pantanal

open access: yesPubvet, 2017
O objetivo deste trabalho foi avaliar o desempenho de dois grupamentos genéticos de novilhos F1 Angus*Nelore e Nelore em confinamento a pasto e sua viabilidade econômica.
Luiz Carlos Pereira   +8 more
doaj   +1 more source

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