Results 71 to 80 of about 3,958 (201)

A uterine‐centric view of reproductive senescence: Genetic insights into late‐life performance in laying hens

iMetaOmics, EarlyView.
This study identifies uterus weight as a heritable (h2 = 0.45) intermediate phenotype that independently associates with late‐life egg production and eggshell quality in aged laying hens. Genome‐wide association study (GWAS) reveals a genome‐wide significant locus on chromosome 3 and suggestive loci on chromosome 11 for uterus weight, mediation ...
Junnan Zhang, Mingyue Gao, Ronglang Cai, Xinwei Jiang, Boxuan Zhang, Zhaojie Li, Ning Yang, Congjiao Sun   +7 more
wiley   +1 more source

Uncovering Biogas Outcomes: Tales of Hubris, Hope, and Failure From Southern Malawi

Natural Resources Forum, EarlyView.
ABSTRACT The purpose of this article is to speak directly to biogas failure. Over the past two decades, immense amounts of money have been spent by African governments, private individuals, and most conspicuously, international aid agencies and donors, on countless biogas projects in every country on the continent.
Marc Kalina, Jonathan Kwangulero, Jonathan Òlal Ogwang, Natalie Boyd Williams, Elizabeth Tilley   +4 more
wiley   +1 more source

Studies on the Biotin Requirement of Broiler Breeders ,

Poultry Science, 1972
Abstract The minimum requirement of biotin for maximum hatchability of eggs and livability of chicks was determined for broiler breeder hens maintained in individual cages. Groups of hens were fed casein-gelatin, glucose diets containing 20, 40, 60, 100, 180 and 340 μg. biotin/kg. of diet. The requirement was found to be approximately 100 μg.
L E, Brewer, H M, Edwards
openaire   +2 more sources

Genetic Evaluation of Pure Line Laying Hens Based on Crossover Testing Data From Simulated Populations

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT Commercial laying hen breeding programs aim to maximize the performance of crossbred animals. However, selection is usually based on data from pure lines raised in controlled nucleus environments, which may not fully predict the yields under commercial conditions.
M. Sánchez‐Diaz, N. Ibáñez‐Escriche, D. López‐Carbonell, D. Cavero, L. Varona   +4 more
wiley   +1 more source

Body Composition of the Broiler-Breeder Pullet

Poultry Science, 1990
Broiler breeder pullets were reared on a standard breeder-grower diet in accordance with breeder recommendations to 10 wk of age, with samples of the birds being selected for carcass analysis at 2, 3, 4, 5, 6, 7, 8 and 10 wk of age. At 10 wk of age, 264 pullets were assigned to one of three diets formulated to contain 15% CP and to provide 2,550, 2,800
C D, Bennett, S, Leeson
openaire   +2 more sources

Haematological and histopathological monitoring of monosodium glutamate–supplemented feeding in rainbow trout (Oncorhynchus mykiss): A possible modelling for a single health approach

Journal of Fish Biology, EarlyView.
Abstract The aim of this study was to investigate the potential effects of monosodium glutamate (MSG), a known flavour enhancer added to many ready‐to‐eat foods, as a feed additive in rainbow trout (Oncorhynchus mykiss). Evaluating the effects of MSG on aquatic organisms will fill the knowledge gap in this field by monitoring the haematological indices
Gonca Alak, Furkan Bedir, Aslı Çilingir Yeltekin, Serkan Yıldırım, Eylül Ecrin Ekiz, Nisa Gül Yiğit, Esat Mahmut Kocaman, Metin Kiliçlioğlu, Tuba Akbey, Elif Zeynep Özçelik, Koray Koşar, Muhammet Alaeddin Ekiz, Arzu Ucar, Ahmet Atmaca, Melihat Pilgi, Veysel Parlak, Muhammed Atamanalp   +16 more
wiley   +1 more source

Sexual Maturity in Broiler Breeder Males

Poultry Science, 1978
Sexual maturity and fertility of two lines of broiler breeder males, one commercial and one experimental, were evaluated individually in order to determine the earliest age at which they could be expected to produce viable spermatozoa capable of producing acceptable fertility.
openaire   +2 more sources

Feeding Laboratory Mice: Comparing a Standard Versus a Purified Diet – Marked Effects on Digestive Physiology

Journal of Animal Physiology and Animal Nutrition, EarlyView.
ABSTRACT Diet composition and processing have a major impact on its utilisation by the animal, as is known from farm and pet animal species. This includes effects on energy and nutrient digestibility, the intermediary metabolism, and the intestinal microbiome, with all the resulting impacts. For laboratory animals, data is scarce on influencing factors
L. F. Böswald, A. Zeyner, M. M. Santo, M. Wensch‐Dorendorf, A. Sünder, B. Popper, W. Siegert   +6 more
wiley   +1 more source

Effect of Storage Time, Broiler Breeder Strain, and Age on Hatchability and First-Week Broiler Performance [PDF]

Brazilian Journal of Poultry Science
Managing fertile eggs and minimizing seasonal impacts is crucial in poultry farming. This study evaluated the effects of the storage time of fertile eggs, broiler breeder strain, and age on hatchability and first-week broiler performance.
ALD Volpe, A Slaviero, A Scher, PV Molinari, MW Gerber, VM Marcon, F Moreira, I Bianchi, E Schwegler, CB Tanure, V Peripolli   +10 more
doaj   +1 more source

Evaluation of Torula Yeast (Candida utilis) Single Cell Proteins as a Partial Replacement for Soybean Meal in Broiler Diets: Effects on Productive Performance, Meat Quality Traits, and Plasma Metabolome

Journal of Animal Physiology and Animal Nutrition, EarlyView.
ABSTRACT Over recent years the use of yeast in feedstuffs has gained momentum due to novel developments in single‐cell proteins (SCPs). SCPs are considered a sustainable protein source, as their production enable to convert low‐value substrates (including industrial/agricultural wastes) into feed, with a related reduced environmental impact. This study
Jonathan Dayan, Marco Zampiga, Francesca Soglia, Luca Laghi, Elisa Benini, Massimiliano Petracci, Federico Sirri   +6 more
wiley   +1 more source