Recombination nodules in the oocytes of the chicken, Gallus domesticus

1986 ◽  
Vol 43 (3-4) ◽  
pp. 187-193 ◽  
Author(s):  
M.I. Rahn ◽  
A.J. Solari
Keyword(s):  
Gallus Domesticus ◽  
Recombination Nodules

Otoconia formation in the chick embryo

1983 ◽  
Vol 41 ◽  
pp. 572-573
Author(s):  
C.D. Fermin ◽  
M. Igarashi
Keyword(s):  
Chick Embryo ◽  
Inner Ear ◽  
Gallus Domesticus ◽  
The Body ◽  
Abnormal Behavior ◽  
Intensive Study ◽  
Basic Fuchsin ◽  
Gestational Period ◽  
Sensory Epithelia ◽  
Transmission Electron

Otoconia are microscopic geometric structures that cover the sensory epithelia of the utricle and saccule (gravitational receptors) of mammals, and the lagena macula of birds. The importance of otoconia for maintanance of the body balance is evidenced by the abnormal behavior of species with genetic defects of otolith. Although a few reports have dealt with otoconia formation, some basic questions remain unanswered. The chick embryo is desirable for studying otoconial formation because its inner ear structures are easily accessible, and its gestational period is short (21 days of incubation).The results described here are part of an intensive study intended to examine the morphogenesis of the otoconia in the chick embryo (Gallus- domesticus) inner ear. We used chick embryos from the 4th day of incubation until hatching, and examined the specimens with light (LM) and transmission electron microscopy (TEM). The embryos were decapitated, and fixed by immersion with 3% cold glutaraldehyde. The ears and their parts were dissected out under the microscope; no decalcification was used. For LM, the ears were embedded in JB-4 plastic, cut serially at 5 micra and stained with 0.2% toluidine blue and 0.1% basic fuchsin in 25% alcohol.

Otoconia perfect/imperfect crystals

1994 ◽  
Vol 52 ◽  
pp. 42-43
Author(s):  
César D. Fermin ◽  
Dale Martin
Keyword(s):  
Image Processing ◽  
Room Temperature ◽  
Phosphotungstic Acid ◽  
Gallus Domesticus ◽  
Crystal Matrix ◽  
Organic Templates ◽  
Image Processing Algorithms ◽  
Processing Algorithms ◽  
Diffraction Patterns

Otoconia of higher vertebrates are interesting biological crystals that display the diffraction patterns of perfect crystals (e.g., calcite for birds and mammal) when intact, but fail to produce a regular crystallographic pattern when fixed. Image processing of the fixed crystal matrix, which resembles the organic templates of teeth and bone, failed to clarify a paradox of biomineralization described by Mann. Recently, we suggested that inner ear otoconia crystals contain growth plates that run in different directions, and that the arrangement of the plates may contribute to the turning angles seen at the hexagonal faces of the crystals.Using image processing algorithms described earlier, and Fourier Transform function (2FFT) of BioScan Optimas®, we evaluated the patterns in the packing of the otoconia fibrils of newly hatched chicks (Gallus domesticus) inner ears. Animals were fixed in situ by perfusion of 1% phosphotungstic acid (PTA) at room temperature through the left ventricle, after intraperitoneal Nembutal (35mg/Kg) deep anesthesia. Negatives were made with a Hitachi H-7100 TEM at 50K-400K magnifications. The negatives were then placed on a light box, where images were filtered and transferred to a 35 mm camera as described.

Caracterización morfométrica de la gallina de cuello desnudo (Gallus domesticus nudicollis) en la región Chortí de Chiquimula, Guatemala

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Raúl Jáuregui Jiménez
Keyword(s):  
Gallus Domesticus

Se caracterizaron morfométrica, faneróptica y morfológicamente a gallinas y gallos de cuello desnudo (324 hembras,60 machos) en los cuatro municipios de la región ch’ortí de Chiquimula. Las variables evaluadas fueron 18 cuantitativas para la hembra y 16 para el macho, nueve cualitativas y ocho índices zoométricos. El análisis de las variables zoométricas se realizó a través del procedimiento análisis univariado, con medidas de tendencia central y medidas de dispersión, y para analizar la proporcionalidad y armonía entre las diversas regiones corporales mediante la correlación de Pearson. Los resultados principales son: peso de 1.84 kg/hembra y 2.29 kg/macho; alzada 27.84 cm/hembra y 32.51 cm/macho; metatarso 10.25 cm/hembra y 11.76 cm/macho; ambos tienen más alzada que longitud, inclinados hacia adelante; en cuanto a sus perímetros, el abdominal es el mayor y curvado característica de las gallinas ponedoras y una grupa alargada con dorso plano. Sus índices corporales son aves alargadas, con capacidad reproductiva(índice pélvico 71.82%) y poca formación de músculo para la producción de carne (índice compacidad 6.80%/hembra y 7.03%/macho), cabeza alargada, tórax elíptico y miembros fuertes y altos. Las características morfológicas y fanerópticas describen un ave de piel blanca, metatarso amarillo, plumas en garganta, cresta simple con barbilla y orejuelas, los colores de pluma son la combinación de marrón, negro, gris y blanco, el color de la cáscara varia del blanco al marrón claro y con una armonización corporal hasta del 61% lo que le da una homogeneidad medianamente aceptable a la morfoestructura de la gallina.

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.

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