scholarly journals Picobia polonica sp. n. (Acari: Prostigmata: Syringophilidae), a new species of quill mite from the domestic hen, Gallus gallus domesticus (Aves: Phasianidae)

2001 ◽  
Vol 48 (2) ◽  
pp. 154-158 ◽  
Author(s):  
Maciej Skoracki ◽  
Wojciech Magowski ◽  
Jacek Dabert
1993 ◽  
Vol 5 (1) ◽  
pp. 65 ◽  
Author(s):  
D Waddington ◽  
MA Walker

Hierarchical (> 8 mm) and post-ovulatory follicles from the ovaries of laying hens at 45 and 86 weeks of age were assigned to clusters defined by the coalescence of their follicular stalks. They were also classified by size to give the succession in which ovulation had occurred, or would occur for the hierarchical follicles. The association between the order of ovulation and the observed clusters was compared with randomness and with dependence on the cluster in which the immediately preceding ovulation occurred. The order of ovulation was associated randomly with clusters, and was independent of the cluster containing the preceding ovulation. Many perceived clusters of successive follicles and post-ovulatory follicles may be compatible with a random order of ovulation. These findings do not support theories of stimulation or inhibition of adjacent follicles, leading to eventual ovulation, by a dominant follicle.


1973 ◽  
Vol 47 (4) ◽  
pp. 421-438 ◽  
Author(s):  
A. Mohandas

The life cycle ofEchinostoma ivaniosin.sp., found in the rectum of domestic fowl (Gallus gallus domesticus) has been worked out in detail. The eggs hatch in 7–8 days in tap water at room temperature (24-28°C). Body of the miracidium covered with 18 epidermal plates arranged in four tiers of 6, 6, 4, 2 from the anterior to the posterior end. Miracidia develop into sporocysts in the snails,Lymnaea luteola f typica.There are two redial generations and the first cercariae are liberated 25–30 days post-infection with miracidia, or a little later. 37 collar spines of the cercaria are arranged in the pattern-5(3+2)+6+15(8+7)+6+5(3+2). Caudal finfold present, cuticle spinose, paraoesophageal gland cells present, penetration glands two pairs and excretory system with 18 pairs of flame cells in triplets. Metacercaria develops into adult in domestic fowl and the eggs are recovered from the faeces of the host, 12–14 days post-infection. The adult is compared with other 37-spined echinostomes whose life cycles are known or which show characteristic differences from the present species and the creation of a new species is justified.


Animals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 777
Author(s):  
Korakot Nganvongpanit ◽  
Piyatida Kaewkumpai ◽  
Varankpicha Kochagul ◽  
Kidsadagon Pringproa ◽  
Veerasak Punyapornwithaya ◽  
...  

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.


Author(s):  
Webster Leonardo Guimarães da Costa ◽  
Isa Marianny Ferreira Nascimento Barbosa ◽  
Débora Pereira Gomes do Prado ◽  
Natália Domann ◽  
Hanstter Hallison Alves Rezende

2020 ◽  
Vol 23 (4) ◽  
pp. 769-780 ◽  
Author(s):  
Vitor Hugo Bessa Ferreira ◽  
Maxence Barbarat ◽  
Flore Lormant ◽  
Karine Germain ◽  
Mathilde Brachet ◽  
...  

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