Results 121 to 130 of about 182,497 (230)

Genetic Parameter Estimation for Pregnancy Loss and Their Association With Reproductive and Growth Traits in Brahman Cattle Under Extensive Tropical Conditions

Journal of Animal Breeding and Genetics, Volume 143, Issue 2, Page 365-374, March 2026.
ABSTRACT This study estimated genetic parameters for pregnancy loss (PL) in Brahman cattle and evaluated the genetic correlation of PL with growth and reproductive traits using both the pedigree relationship matrix (A) and pedigree plus genomic relationship matrix (H). Data were collected from two herds in Bolivia, focusing on three age groups: heifers,
Daniel Cardona‐Cifuentes, Lucia G. de Albuquerque, Milagros Arias, Sindy Caivio‐Nasner, Luis Camaripano, Luis G. Gonzalez‐Herrera, Patricia I. Schmidt, Fernando Baldi   +7 more
wiley   +1 more source

Temporal dynamics of sperm morphology in broiler breeders: Evidence of rapid non-linear patterns of decline

Poultry Science
Broilers are the cornerstone of poultry meat production. However, recent trends have raised concerns about broiler breeder fertility/ hatchability, which is predicted to decline to 60% by 2050. Data from the National Agricultural Statistics Service (NASS)
Kolton Witherspoon, Florie Sambuis, Triumph Okuku, Cara Cash, George Hammons, Ziteng Xu, Ky G. Pohler, Giridhar Athrey   +7 more
doaj   +1 more source

The welfare of broiler breeders

Animal Welfare, 1999
In August 1998, the UK's Farm Animal Welfare Council (FAWC) published its most recent report: addressing the welfare of broiler breeders. Some 780 million broiler chicks are produced annually in the UK and at any one time the national population of broiler breeder hens that produce these chicks is about 6 million.
openaire   +1 more source

Achieving reproductive performance and quality chicks with modern broiler breeders

Journal of Applied Poultry Research
Summary: The U.S. broiler industry is currently facing challenges in breeder production and hatchability. Hatchability rates have recently dropped below 82 %, the lowest since 1988 (Agristats Report, 2023), alongside increased mortality in pullets ...
Hugo Romero-Sanchez, Henk Enting, Lieske van Eck, Rick van Emous, Felipe Kroetz Neto, Estella Leentfaar, Bob Buresh   +6 more
doaj   +1 more source

Lysine: Amino acid requirements of broiler breeders

Poultry Science, 1998
Because feed intake is controlled in broiler breeders, amino acid supply is determined by the composition of the feed and the level of feed intake. Controlling amino acid supply during the laying cycle can be facilitated by the use of a model for calculating requirements. A possible model is outlined and the various components discussed.
openaire   +2 more sources

Broiler Breeder Egg Shape

Poultry Science, 1980
F.H. BENOFF, J.A. RENDEN
openaire   +1 more source

Health effects of feed dilution and roughage in Ross 308 broiler breeder cockerels. [PDF]

Poult Sci, 2023
Kittelsen KE, Vasdal G, Moe RO, Steinhoff FS, Tahamtani FM.   +4 more
europepmc   +1 more source

Metformin improves ovarian function and increases egg production in broiler breeder hens. [PDF]

Reproduction, 2023
Weaver EA, Ramachandran R.
europepmc   +1 more source

Relationships between stress indicators and sexual development during onset of maturity in broiler breeder roosters. [PDF]

Poult Sci
Caliva JM, Marozzi A, Nobili MC, Guidobaldi HA, Marin RH, Kembro JM.   +5 more
europepmc   +1 more source