scholarly journals Hens (Gallus gallus domesticus) with larger spurs have higher faecal testosterone levels; evidence of female to male - like phenotype

2018 ◽  
Author(s):  
John P Kent ◽  
Niamh M Hynes ◽  
Thomas J Hayden ◽  
Kenneth J Murphy ◽  
Laurence O'Dywer
Keyword(s):  
Gallus Gallus ◽  
Sex Reversal ◽  
Gallus Domesticus ◽  
Gallus Gallus Domesticus ◽  
Testosterone Levels ◽  
Secondary Sexual Characteristic ◽  
Male Sex ◽  
Testosterone Metabolites ◽  
Sexual Characteristic ◽  
Secondary Sexual

Spurs are a testosterone-dependent secondary sexual characteristic of male chickens (Gallus gallus domesticus) and are used as ‘weapons’ in intra-sexual fighting. While predominantly a male feature, they are also found in a small number of females. Here we show that faecal testosterone metabolites of adult hens (i.e. females) with large spurs are significantly greater than those of females with smaller spurs. The presence of spurs in hens together with elevated testosterone levels are indicative of a masculinisation process that may increase with age. This is of particular interest in the study of female to male sex-reversal in fowl.

scholarly journals Hens (Gallus gallus domesticus) with larger spurs have higher faecal testosterone levels; evidence of female to male - like phenotype

2018 ◽  
Author(s):  
John P Kent ◽  
Niamh M Hynes ◽  
Thomas J Hayden ◽  
Kenneth J Murphy ◽  
Laurence O'Dywer
Keyword(s):  
Gallus Gallus ◽  
Sex Reversal ◽  
Gallus Domesticus ◽  
Gallus Gallus Domesticus ◽  
Testosterone Levels ◽  
Secondary Sexual Characteristic ◽  
Male Sex ◽  
Testosterone Metabolites ◽  
Sexual Characteristic ◽  
Secondary Sexual

Spurs are a testosterone-dependent secondary sexual characteristic of male chickens (Gallus gallus domesticus) and are used as ‘weapons’ in intra-sexual fighting. While predominantly a male feature, they are also found in a small number of females. Here we show that faecal testosterone metabolites of adult hens (i.e. females) with large spurs are significantly greater than those of females with smaller spurs. The presence of spurs in hens together with elevated testosterone levels are indicative of a masculinisation process that may increase with age. This is of particular interest in the study of female to male sex-reversal in fowl.

Status of Diversity of Cestode Parasites of Domestic Fowl (Gallus Gallus Domesticus) from Nanded District, Maharashtra State

2011 ◽  
Vol 3 (10) ◽  
pp. 1-4
Author(s):  
Dhanraj Balbhim Bhure ◽  
◽  
Sanjay Shamrao Nanware ◽  
Namrata V Sunnap
Keyword(s):  
Domestic Fowl ◽  
Gallus Gallus ◽  
Gallus Domesticus ◽  
Gallus Gallus Domesticus

scholarly journals Distribution of Melanin Pigmentation in 33 Organs of Thai Black-Bone Chickens (Gallus gallus domesticus)

Animals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 777
Author(s):  
Korakot Nganvongpanit ◽  
Piyatida Kaewkumpai ◽  
Varankpicha Kochagul ◽  
Kidsadagon Pringproa ◽  
Veerasak Punyapornwithaya ◽  
...  
Keyword(s):  
Gallus Gallus ◽  
Gallus Domesticus ◽  
Melanin Pigment ◽  
Gallus Gallus Domesticus ◽  
Tissue Samples ◽  
Melanin Pigmentation ◽  
Chicken Breed ◽  
Brachial Vein ◽  
The Brain ◽  
Pigment Accumulation

The black-bone chicken (Gallus gallus domesticus) is a breed of chicken that is commonly found in Thailand. This breed is known for having a number of black colored organs. Consumers have been notably attracted to the black-bone chicken breed for the characteristic darkness that is observed in many of its organs. However, the degree of darkness in all organs of the black-bone chicken is still in question. Importantly, there have not yet been any published reports on the distribution of melanin pigment in the organs of the black-bone chicken. This research study aims to examine the distribution of the melanin pigment in 33 organs of the Thai black-bone chicken. Ten black-bone chickens (five male, five female) were included in this study. Thirty-two organs including the brain, spinal cord, sciatic nerve, larynx, trachea, syrinx, lungs, heart, pericardium, aorta, brachial vein, kidney, cloaca, oviduct, testis, gastrocnemius muscle, femur, tongue, esophagus, crop, proventriculus, gizzard, duodenum, jejunum, ileum, cecum, pancreas, liver, gall bladder, omentum, abdominal fat, spleen, and skin were examined in this study. Histological sections taken from tissue samples of each of these organs were studied. The findings revealed that the presence of the melanin pigment was not significantly different (p > 0.005) between male and female specimens. Notably, the liver was the only organ in which the melanin pigment had not accumulated. Consequently, there was not a uniform pattern of melanin pigment accumulation throughout the organs of the chickens. The melanin pigment was present in all of the tissue layers of most organs, while the melanin pigment was found in only specific layers of some of the organs. In conclusion, the distribution of melanin pigmentation in the organs of each of the animals in this study was found to be different. However, in some tissue samples, such as those obtained from the liver, no accumulation of the melanin pigment was observed.

scholarly journals A systematic review of Toxoplasma gondii genotypes in Gallus gallus domesticus worldwide: The focus is Brazil

2021 ◽  
Author(s):  
Webster Leonardo Guimarães da Costa ◽  
Isa Marianny Ferreira Nascimento Barbosa ◽  
Débora Pereira Gomes do Prado ◽  
Natália Domann ◽  
Hanstter Hallison Alves Rezende
Keyword(s):  
Systematic Review ◽  
Toxoplasma Gondii ◽  
Gallus Gallus ◽  
Gallus Domesticus ◽  
Gallus Gallus Domesticus

Social motivation and the use of distal, but not local, featural cues are related to ranging behavior in free-range chickens (Gallus gallus domesticus)

2020 ◽  
Vol 23 (4) ◽  
pp. 769-780 ◽  
Author(s):  
Vitor Hugo Bessa Ferreira ◽  
Maxence Barbarat ◽  
Flore Lormant ◽  
Karine Germain ◽  
Mathilde Brachet ◽  
...  
Keyword(s):  
Social Motivation ◽  
Gallus Gallus ◽  
Gallus Domesticus ◽  
Gallus Gallus Domesticus ◽  
Ranging Behavior ◽  
Free Range

Egg residue and depletion in Rhode Island Red hens (Gallus gallus domesticus) following multiple oral doses of Trimethoprim-Sulfamethoxazole

2021 ◽  
pp. 104941
Author(s):  
Hiroko Enomoto ◽  
Olivia A. Petritz ◽  
Andrea E. Thomson ◽  
Keven Flammer ◽  
Farha Ferdous ◽  
...  
Keyword(s):  
Rhode Island ◽  
Gallus Gallus ◽  
Gallus Domesticus ◽  
Gallus Gallus Domesticus ◽  
Oral Doses

Campanulotes compar (Burmeister, 1838) (Phthiraptera: Ischnocera) in chickens (Gallus gallus domesticus) from Rio Grande do Norte State, Brazil. The reemergence of an ectoparasite?

2013 ◽  
Vol 195 (1-2) ◽  
pp. 203-204
Author(s):  
Caroline Gracielle Torres Ferreira ◽  
Cláudio Mafra ◽  
Ana Carla Diógenes Suassuna Bezerra ◽  
Otávio Valério de Carvalho ◽  
Abelardo Silva ◽  
...  
Keyword(s):  
Rio Grande ◽  
Gallus Gallus ◽  
Gallus Domesticus ◽  
Gallus Gallus Domesticus

scholarly journals Molecular mechanisms of growth depression in broiler chickens (Gallus Gallus domesticus) mediated by immune stress: a hepatic proteome study

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Aijuan Zheng ◽  
Anrong Zhang ◽  
Zhimin Chen ◽  
Shoaib Ahmed Pirzado ◽  
Wenhuan Chang ◽  
...  
Keyword(s):  
Broiler Chickens ◽  
Molecular Mechanisms ◽  
Gallus Gallus ◽  
Gallus Domesticus ◽  
Economic Losses ◽  
Poultry Production ◽  
Gallus Gallus Domesticus ◽  
Growth Depression ◽  
Stress Group ◽  
Immune Stress

Abstract Background Immunological stress decreases feed intake, suppresses growth and induces economic losses. However, the underlying molecular mechanism remains unclear. Label-free liquid chromatography and mass spectrometry (LC-MS) proteomics techniques were employed to investigate effects of immune stress on the hepatic proteome changes of Arbor Acres broilers (Gallus Gallus domesticus) challenged with Escherichia coli lipopolysaccharide (LPS). Results Proteomic analysis indicated that 111 proteins were differentially expressed in the liver of broiler chickens from the immune stress group. Of these, 28 proteins were down-regulated, and 83 proteins were up-regulated in the immune stress group. Enrichment analysis showed that immune stress upregulated the expression of hepatic proteins involved in defense function, amino acid catabolism, ion transport, wound healing, and hormone secretion. Furthermore, immune stress increased valine, leucine and isoleucine degradation pathways. Conclusion The data suggests that growth depression of broiler chickens induced by immune stress is triggered by hepatic proteome alterations, and provides a new insight into the mechanism by which immune challenge impairs poultry production.

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