Embryonic development of endoderm in chicken (Gallus gallus domesticus)

2013 ◽  
Vol 76 (8) ◽  
pp. 803-803 ◽  
Author(s):  
Dayane Alcântara ◽  
Marcio N. Rodrigues ◽  
André L. R. Franciolli ◽  
Erika T. Da Fonseca ◽  
Fernanda M. O. Silva ◽  
...  
Keyword(s):  
Embryonic Development ◽  
Gallus Gallus ◽  
Gallus Domesticus ◽  
Gallus Gallus Domesticus

scholarly journals Effects of estrogens and antiestrogens on gonadal sex differentiation and embryonic development in the domestic fowl (Gallus gallus domesticus)

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5094 ◽  
Author(s):  
Luzie Jessl ◽  
Rebecca Lenz ◽  
Fabian G. Massing ◽  
Jessica Scheider ◽  
Jörg Oehlmann
Keyword(s):  
Embryonic Development ◽  
Domestic Fowl ◽  
Sex Differentiation ◽  
Gallus Gallus ◽  
Gallus Domesticus ◽  
Seminiferous Tubules ◽  
Endocrine Disorders ◽  
Avian Embryo ◽  
Gallus Gallus Domesticus ◽  
In Ovo

Since it is known that environmental contaminants have the potential to cause endocrine disorders in humans and animals, there is an urgent need for in vivo tests to assess possible effects of these endocrine disrupting chemicals (EDCs). Although there is no standardized guideline, the avian embryo has proven to be particularly promising as it responds sensitively to a number of EDCs preferentially impacting the reproductive axis. In the present study we examined the effects of in ovo exposure to fulvestrant and tamoxifen as antiestrogenic model compounds and co-exposure to both substances and the potent estrogen 17α-ethinylestradiol (EE2) regarding sex differentiation and embryonic development of the domestic fowl (Gallus gallus domesticus). The substances were injected into the yolk of fertilized eggs on embryonic day 1. On embryonic day 19 sex genotype and phenotype were determined, followed by gross morphological and histological examination of the gonads. Sole EE2-treatment (20 ng/g egg) particularly affected male gonads and resulted in an increased formation of female-like gonadal cortex tissue and a reduction of seminiferous tubules. In ovo exposure to tamoxifen (0.1/1/10 µg/g egg) strongly impaired the differentiation of female gonads, led to a significant size reduction of the left ovary and induced malformations of the ovarian cortex, while fulvestrant (0.1/1/10 µg/g egg) did not affect sexual differentiation. However, both antiestrogens were able to antagonize the feminizing effects of EE2in genetic males when administered simultaneously. Since both estrogens and antiestrogens induce concentration-dependent morphological alterations of the sex organs, the chick embryo can be regarded as a promising model for the identification of chemicals with estrogenic and antiestrogenic activity.

Embryonic development of chicken (Gallus Gallus Domesticus) From 1st to 19th Day-ectodermal structures

2013 ◽  
Vol 76 (12) ◽  
pp. 1217-1225 ◽  
Author(s):  
Erika Toledo Fonseca ◽  
Fernanda Menezes De Oliveira Silva ◽  
Dayane Alcântara ◽  
Rafael Carvalho Cardoso ◽  
André Luís Franciolli ◽  
...  
Keyword(s):  
Embryonic Development ◽  
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
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