scholarly journals Localization of Alpha-Keratin and Beta-Keratin (Corneous Beta Protein) in the Epithelium on the Ventral Surface of the Lingual Apex and Its Lingual Nail in the Domestic Goose (Anser Anser f. domestica) by Using Immunohistochemistry and Raman Microspectros

2017 ◽  
Vol 300 (8) ◽  
pp. 1361-1368 ◽  
Author(s):  
Kinga Skieresz-Szewczyk ◽  
Hanna Jackowiak ◽  
Tomasz Buchwald ◽  
Mirosław Szybowicz
Keyword(s):  
Ventral Surface ◽  
Anser Anser ◽  
Alpha Keratin

The gizzard morphology of an avian herbivore: the domestic goose, Anser anser

1998 ◽  
Vol 46 (4) ◽  
pp. 345 ◽  
Author(s):  
S. J. Moore
Keyword(s):  
Muscle Fibre ◽  
Ventral Surface ◽  
Anser Anser ◽  
Fibre Bundles

The gizzard of the herbivorous domestic goose, Anser anser, was investigated in order to understand how it can break down food such as grass. The gizzard consists of two thick opposing muscles that are joined on its dorsal and ventral surface by large tendons. The long axis of the fibre bundles of these muscles are aligned with the rigid lumen of the gizzard. Thus, the distance between the two tendons cannot decrease during contraction. Instead, contractions reduce the curvature of the muscle fibre bundles. This reduction in curvature and associated swelling of the muscle bundles generates forces in the lumen of the gizzard. However, as the thick muscles are asymmetrical, these forces generate translational rather than simple compressive movements. Such movement is also suggested by the wear on the lining of the gizzard lumen. A band of thin muscle runs perpendicular to the thick muscles and positions the food in the lumen in readiness to allow for food breakdown by the thick muscles.

Scanning electron microscopy of the integument of schistosoma rodhaini

1986 ◽  
Vol 44 ◽  
pp. 132-133
Author(s):  
P. Evers ◽  
C. Schutte ◽  
C. D. Dettman
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Oral Sucker ◽  
Adult Male ◽  
Dorsal Surface ◽  
Ventral Surface ◽  
Sensory Receptors ◽  
East African ◽  
Dorsal Midline ◽  
Scanning Electron

S.rodhaini (Brumpt 1931) is a parasite of East African rodents which may possibly hybridize with the human schistosome S. mansoni. The adult male at maturity measures approximately 3mm long and possesses both oral and ventral suckers and a marked gynaecophoric canal. The oral sucker is surrounded by a ring of sensory receptors with a large number of inwardly-pointing spines set into deep sockets occupying the bulk of the ventral surface of the sucker. Numbers of scattered sensory receptors are found on both dorsal and ventral surfaces of the head (Fig. 1) together with two conspicuous rows of receptors situated symmetrically on each side of the midline. One row extends along the dorsal surface of the head midway between the dorsal midline and the lateral margin.

Current Status of Anserinae Wintering in Azov-Black Sea Region of Ukraine

2019 ◽  
Vol 53 (4) ◽  
pp. 297-312
Author(s):  
Yu. O. Andryushchenko ◽  
V. S. Gavrilenko ◽  
V. A. Kostiushyn ◽  
V. N. Kucherenko ◽  
A. S. Mezinov ◽  
...  
Keyword(s):  
Black Sea ◽  
Current Status ◽  
Anser Anser ◽  
Scientific Publications ◽  
Climate Conditions ◽  
Black Sea Region ◽  
Chen Caerulescens ◽  
Branta Bernicla ◽  
The North ◽  
Different Seasons

Abstract In the article is analyzed own field data of the authors and scientific publications on the wintering of Anserinae in the Azov-Black Sea region of Ukraine in 1900–2017, but the main data was obtained in frame of international mid-winter counts (IWC) in 2005–2017. It was found that 9 species of Anserinae occur in this region during the different seasons of the year: Anser anser — nesting, wintering and migrating; Rufibrenta ruficollis, A. albifrons, A. erythropus, A. fabalis — migrating and wintering; Branta canadensis, Branta leucopsis, Branta bernicla, Chen caerulescens — vagrant or birds which flew away from captivity (zoo etc.). Eulabeia indica — is possible vagrant species. The most numerous wintering species is A. albifrons, common — Rufibrenta ruficollis, not numerous — Anser anser, the other species are not met annually and registered in a very small number. There was almost tenfold drop in number of wintering geese in the Azov-Black Sea region of Ukraine during the period of counts. The main reasons of such reducing of geese amount are the followwing: weather and climate conditions, changes in the forage acessibility, hunting and poaching pressure, poisoning as a result of deratization of agricultural lands, and from 2014 — the militarization of the Syvash area and stop of water supplying of Crimea through the North Crimean channell. It is likely that the factors mentioned above led to relocating of wintering areas of Anserinae, and resulted in decreasing of their amount in this region.

FIBROSSARCOMA CRANIANO EM GANSO-COMUM (Anser anser)

2020 ◽  
Author(s):  
Gabriela da Silveira Capriolli ◽  
William Lins Batista ◽  
Carolina Silveira Braga ◽  
Marcelo Meller Alievi
Keyword(s):  
Anser Anser

Видовой состав фауны эндопаразитов диких птиц отряда Пластинчатоклювые (Anseriformes) в регионе Северного Кавказа

2015 ◽  
pp. 36-38
Author(s):  
Вагид Шарапудинович Пашаев ◽  
Анатолий Мурашевич Биттиров ◽  
Црай Бесланович Кагермазов
Keyword(s):  
Anser Anser ◽  
Anas Crecca ◽  
Mergus Merganser ◽  
Anas Strepera ◽  
Anser Erythropus

В статье приведены сведения о видовом составе эндопаразитофауны у семи видов птиц отряда Пластинчатоклювые (Anseriformes) в регионе Северного Кавказа. У видов Anser anser L., Anser erythropus, Anas platyrhynehos L., Anas strepera L., Anas crecca L., Tadorna tadorna L., Mergus merganser L. определено 13 видов рода эймерия, 116 видов био- и геогельминтов, в том числе: Trematoda — 87 видов, Cestoda — 14 видов, Nematoda — 10 видов, Acantocephala — 5 видов с тенденцией формирования в организме птиц простых и сложных многокомпонентных паразитокомплексов. Исследования проводили в 2006 – 2014 гг. на базах ФГУ «Эльбрусский национальный парк», ФГУ «Кабардино-Балкарский государственный высокогорный заповедник», в 12 охотничьих хозяйствах и участках Кабардино-Балкарской Республики и Республики Дагестан на диких и синантропных птицах разного возраста. Паразитологическим исследованиям подвергнуты семь видов диких птиц отряда Пластинчатоклювые (всего 660 особей): серый гусь Anser anser L. — 110 особей, малый белолобый гусь Anser erythropus — 95 особей, обыкновенная кряква Anas platyrhynehos L. — 216 особей, серая утка Anas strepera L. — 100 особей, чирок-свистунок Anas crecca L. — 45 особей, пеганка Tadorna tadorna L. — 76 особей, большой крохаль Mergus merganser L. — 18 особей. Для изучения видовой структуры эндопаразитов применяли методы полного и неполного гельминтологического вскрытия. Использованы статистические методы дисперсионного анализа; вычисления выполнены с помощью программы Statistica 6.0.

scholarly journals Heat dissipation in subterranean rodents: the role of body region and social organisation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
František Vejmělka ◽  
Jan Okrouhlík ◽  
Matěj Lövy ◽  
Gabriel Šaffa ◽  
Eviatar Nevo ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Heat Dissipation ◽  
Ventral Surface ◽  
Body Region ◽  
Subterranean Rodents ◽  
Ambient Temperatures ◽  
Social Species ◽  
Body Regions ◽  
Body Heat ◽  
Solitary Species

AbstractThe relatively warm and very humid environment of burrows presents a challenge for thermoregulation of its mammalian inhabitants. It was found that African mole-rats dissipate body heat mainly through their venter, and social mole-rats dissipate more body heat compared to solitary species at lower temperatures. In addition, the pattern of the ventral surface temperature was suggested to be homogeneous in social mole-rats compared to a heterogeneous pattern in solitary mole-rats. To investigate this for subterranean rodents generally, we measured the surface temperatures of seven species with different degrees of sociality, phylogeny, and climate using infrared thermography. In all species, heat dissipation occurred mainly through the venter and the feet. Whereas the feet dissipated body heat at higher ambient temperatures and conserved it at lower ambient temperatures, the ventral surface temperature was relatively high in all temperatures indicating that heat dissipation to the environment through this body region is regulated mainly by behavioural means. Solitary species dissipated less heat through their dorsum than social species, and a tendency for this pattern was observed for the venter. The pattern of heterogeneity of surface temperature through the venter was not related to sociality of the various species. Our results demonstrate a general pattern of body heat exchange through the three studied body regions in subterranean rodents. Besides, isolated individuals of social species are less able to defend themselves against low ambient temperatures, which may handicap them if staying alone for a longer period, such as during and after dispersal events.

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