Results 81 to 90 of about 12,187 (252)

Female plumage spottiness signals parasite resistance in the barn owl (Tyto alba) [PDF]

open access: yes, 2017
The hypothesis that extravagant ornaments signal parasite resistance has received support in several species for ornamented males but more rarely for ornamented females.
Dijkstra, Cor   +3 more
core  

Richness and Abundance of Carabidae and Staphylinidae (Coleoptera), in Northeastern Dairy Pastures Under Intensive Grazing [PDF]

open access: yes, 2018
Dairy cattle has become popular to dairy farmers in the Northeast looking for management schemes to cut production costs. Carabidae (ground beetles) and Staphylinidae (rove beetles) are indicators of habitat disturbances, such as drainage of wetlands, or
Barker, G. M   +4 more
core   +3 more sources

Genetic and Biological Characteristics of Gruid Herpesvirus 1 Isolated From Wild Cranes Affected by Inclusion Body Disease of Cranes

open access: yesTransboundary and Emerging Diseases, Volume 2025, Issue 1, 2025.
Inclusion body disease of cranes (IBDCs) is fatal in many cases and reportedly caused by a herpes‐like virus labeled as gruid herpesvirus 1 (GrHV‐1). Although GrHV‐1 has been isolated from IBDC‐affected cranes, it has not been genetically classified because its genome has not been partially or fully sequenced.
Kemi Ishikawa   +11 more
wiley   +1 more source

Pengaruh Penambahan Tepung Rimpang Temu Kunci (Boesenbergia Pandurata Roxb) Dalam Ransum Terhadap Ketahanan Tubuh Ayam Broiler (the Effect of Powder Addition Fingerroot Rhizome (Boesenbergia Pandurata Roxb) in the Diet on Broiler Body Resistance) [PDF]

open access: yes, 2014
The aimed of the research was determined the effect of powder addition fingerroot rhizome in the diet on broiler body resistance with observed leukocyte total, heterophile lymphocyte ratio and bursa fabricius weight.
Atmomarsono, U. (Umiyati)   +2 more
core  

Two new notocotylid trematodes from birds in Tasmania and their life histories [PDF]

open access: yes, 1983
Paramonostomum caeci n. sp., adults of which occur mainly in the intestinal caeca of Anas supereiliosa, Cygnus atratus and Polioeephalus polioeephalus, is described. It is considered to closely resemble P.
Hickman, JL, Smith, SJ
core   +2 more sources

Modification of the terms of authorisation of the feed additive consisting of canthaxanthin for chickens for fattening, minor poultry species for fattening, laying poultry and poultry reared for laying, ornamental fish and ornamental birds and ornamental breeder hens to include canthaxanthin produced with Yarrowia lipolytica CBS 146148 (DSM Nutritional Products Ltd.)

open access: yesEFSA Journal, Volume 23, Issue 1, January 2025.
Abstract Following a request from the European Commission, the European Food Safety Authority was asked to deliver a scientific opinion on the proposed modification of the terms of the authorisation of canthaxanthin, regarding the addition of a new production route, by the yeast Yarrowia lipolytica CBS 146148.
EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP Panel)   +30 more
wiley   +1 more source

Pathogenicity and Molecular Characterisation of the VP2 Gene of Infectious Bursal Disease Virus [PDF]

open access: yes, 2001
Pathogenicity of four infectious bursal disease virus (IBDV) isolates was studied on specific-pathogen-free (SPF) chickens. Chickens inoculated with isolates 92/04, 94/B551 and 97/61 developed severe clinical manifestations with a high mortality ranging ...
Mahfuzul Hoque, Md
core  

A teleost structural analogue to the avian bursa of Fabricius

open access: yesJournal of Anatomy, 2019
AbstractThe bursa of Fabricius is a primary and secondary lymphoid organ considered exclusively present in birds, and studies of this structure have been vital to our current understanding of the adaptive immune system of vertebrates. In this study, we reveal substantial lymphoepithelial tissue in a previously undescribed bursa in Atlantic salmon ...
Oskar M. Løken   +3 more
openaire   +5 more sources

Optimising Growth, Immunity, and Gene Expression in Broiler Chickens Through Dietary Threonine Levels and Oil Inclusion

open access: yesVeterinary Medicine and Science, Volume 10, Issue 6, November 2024.
This research investigated the impact of varying threonine levels and dietary oil content on broiler chickens' growth and immunity. The results showed that combining high oil with a threonine level of 115% led to optimal outcomes for the birds. This combination improved growth performance, immune parameters, intestinal health, and gene expression ...
Mohamed I. El‐Katcha   +10 more
wiley   +1 more source

Marine algal polysaccharides alleviate aflatoxin B1-induced bursa of Fabricius injury by regulating redox and apoptotic signaling pathway in broilers

open access: yesPoultry Science, 2021
Aflatoxin B1 (AFB1) causes toxic effect and leads to organ damage in broilers. Marine algal polysaccharides (MAP) of Enteromorpha prolifera exert multiple biological activities, maybe have a potential detoxification effect on AFB1, but the related ...
Yan Guo   +3 more
doaj  

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