scholarly journals Comparison of the antioxidant system response to melatonin implant in raccoon dog (Nyctereutes procyonoides) and silver fox (Vulpes vulpes)

2013 ◽  
Vol 37 ◽  
pp. 641-646
Author(s):  
Svetlana SERGINA ◽  
Irina BAISHNIKOVA ◽  
Viktor ILYUKHA ◽  
Marcin LIS ◽  
Stanislaw LAPINSKI ◽  
...  
Keyword(s):  
Antioxidant System ◽  
Vulpes Vulpes ◽  
System Response ◽  
Nyctereutes Procyonoides ◽  
Raccoon Dog ◽  
Silver Fox

scholarly journals Species- and age-dependent distribution of retinol and α-tocopherol in the Canidae family during the cold season

2021 ◽  
Vol 66 (3) ◽  
Author(s):  
Irina Baishnikova ◽  
Tatiana Ilyina ◽  
Viktor Ilyukha ◽  
Konstantin Tirronen
Keyword(s):  
Vulpes Vulpes ◽  
Interspecific Hybrids ◽  
Cold Season ◽  
The Body ◽  
Kidney Cortex ◽  
Nyctereutes Procyonoides ◽  
Raccoon Dog ◽  
Silver Fox ◽  
Age Related ◽  
Blue Fox

Vitamins A and E are known as nutrients involved in metabolic processes and facilitating the adaptation of animals. The metabolism of these vitamins is closely related to lipid metabolism, which has seasonal variations in animals inhabiting northern latitudes. The aim of this study was to investigate the concentrations of retinol (vitamin A) and α-tocopherol (vitamin E) in the cold season (October to February) in tissues of Canidae species that have different ecological characteristics: the blue fox (Vulpes syn. Alopex lagopus), silver fox (Vulpes vulpes), their interspecific hybrids (Vulpes×Vulpes), raccoon dog (Nyctereutes procyonoides), and grey wolf (Canis lupus). In addition, age-related differences in the levels of these vitamins were determined. Results showed the distribution of retinol and α-tocopherol in the body of the canids was similar, with larger amounts being found in the liver and kidney cortex, which play a regulatory role in the metabolism of these nutrients. The higher retinol level in the liver of wolves and interspecific hybrids of blue fox and silver fox, as compared to the retinol level in the liver of other species, might be species-specific and could also be attributed to dietary differences. The blue fox and raccoon dog both have a higher capacity for α-tocopherol accumulation in the cold season, apparently due to their ability to store substantial fat reserves. Retinol and α-tocopherol levels were generally higher in the tissues of mature animals.

Assessment of fecal microbiota in farmed silver fox (Vulpes vulpes fulva) and raccoon dog (Nyctereutes procyonoides)

2018 ◽  
Vol 68 (3) ◽  
pp. 142-151
Author(s):  
Yongjia Peng ◽  
Zhaoxing Zhang ◽  
Hongqiang Li ◽  
Shuncai Li ◽  
Qiumei Shi ◽  
...  
Keyword(s):  
Vulpes Vulpes ◽  
Fecal Microbiota ◽  
Nyctereutes Procyonoides ◽  
Raccoon Dog ◽  
Silver Fox

scholarly journals Pineal Gland Morphology in Relation to Age and Season in Three Canidae Species

2019 ◽  
Vol 36 (04) ◽  
pp. 247-254
Author(s):  
Svetlana Kalinina ◽  
Viktor Ilyukha ◽  
Lyudmila Uzenbaeva
Keyword(s):  
Pineal Gland ◽  
Morphological Changes ◽  
Nyctereutes Procyonoides ◽  
Raccoon Dog ◽  
Silver Fox ◽  
Reticular Fibers ◽  
Different Ages ◽  
Blue Fox ◽  
Species Specific ◽  
Insight Into

Abstract Introduction The aim of the present study was to determine the morphological features of the pineal gland in three closely related Canidae species (raccoon dog, Nyctereutes procyonoides Gray, 1834; silver fox, Vulpes vulpes L., 1758; and blue fox, Vulpes lagopus L., 1758) of different ages during the breeding (spring) and nonbreeding (winter) periods. Materials and Methods Histological analysis of the pineal glands of canids was performed. Results The morphological changes in the pineal gland detected in the current study are either age-associated, including increase in the reticular fibers and vascularization in the studied species, as well as increase in the amount of the protruding septae in the blue fox, or seasonally related, including an increase in the number and size of blood vessels. The present work reported two types of pigments: lipofuscin (primarily in the silver fox) and melanin (primarily in the raccoon dog and in the blue fox). The pineal gland in the blue fox is characterized by the ability to form corpora arenacea. Conclusions The present study provides the first insight into the morphological changes of the pineal gland in three closely related Canidae species of different ages during the breeding (spring) and nonbreeding (winter) periods, and showed some species-specific features of gland morphology. The aspects concerning the biogenesis of the calcium concretions and the factors influencing the accumulation of pigments need further investigation.

Facilitative interactions between the Eurasian badger (Meles meles), the red fox (Vulpes vulpes), and the invasive raccoon dog (Nyctereutes procyonoides) in Białowieża Primeval Forest, Poland

2008 ◽  
Vol 86 (12) ◽  
pp. 1389-1396 ◽  
Author(s):  
R. Kowalczyk ◽  
B. Jędrzejewska ◽  
A. Zalewski ◽  
W. Jędrzejewski
Keyword(s):  
Vulpes Vulpes ◽  
Meles Meles ◽  
Invasion Success ◽  
Nyctereutes Procyonoides ◽  
Raccoon Dog ◽  
Red Foxes ◽  
Primeval Forest ◽  
Facilitative Interactions ◽  
Raccoon Dogs ◽  
Białowieża Primeval Forest

Based on radio-tracking of Eurasian badgers ( Meles meles (L., 1758)), red foxes ( Vulpes vulpes (L., 1758)), and raccoon dogs ( Nyctereutes procyonoides (Gray, 1834)) and observations at burrows conducted in Białowieża Primeval Forest (eastern Poland) in 1996–2002, we addressed the hypothesis that facilitative interactions between a native (badger) and an alien (raccoon dog) species contributed to the invasion success of the latter. In winter, 88% of badger setts were occupied by both badgers and raccoon dogs, 4% by badgers and red foxes, and 4% by all three species. In summer, only 20% of badger setts were cohabited by other carnivore species (10% by raccoon dogs and 10% by foxes). Duration of occupation of badger setts by raccoon dogs averaged 117 days (SE = 21 days). Seasonal variation in raccoon dog use of badger setts was explained by changes in ambient temperature: the lower was the temperature, the higher was the rate of sett occupation by raccoon dogs. When wintering in the same sett, badgers and raccoon dogs used different parts of the sett. We conclude that facilitation by badgers (through habitat amelioration and refuge from cold and predation) makes the realized niche of raccoon dogs larger than predicted from their fundamental niche. The facilitating role of badger is stronger in winter, which is a critical period for raccoon dog survival in the temperate and boreal zone.

MELANIN IN THE PINEAL GLANDS OF CANIDAE

2020 ◽  
pp. 34-39
Author(s):  
Светлана Николаевна Калинина ◽  
Виктор Александрович Илюха ◽  
Людмила Борисовна Узенбаева ◽  
Екатерина Петровна Антонова ◽  
Екатерина Сергеевна Брулер ◽  
...  
Keyword(s):  
Vulpes Vulpes ◽  
Age Groups ◽  
Great Variability ◽  
Arctic Fox ◽  
Nyctereutes Procyonoides ◽  
Raccoon Dog ◽  
Hematoxylin And Eosin ◽  
Species Membership ◽  
Species Specific ◽  
Raccoon Dogs

Цель - проанализировать наличие меланина и оценить частоту встречаемости пигментированных шишковидных желёз (ШЖ) у псовых разных возрастных групп. Материал и методы. Объекты исследования - енотовидная собака (Nyctereutes procyonoides Grey), лисица (Vulpes vulpes L.) и песец (V. Lagopus L.). У неполовозрелых, или ювенильных (6-8 мес), и половозрелых (1,5-3,5 лет) самок животных каждого вида визуально оценивали наличие пигментации ШЖ и подсчитывали доли (%) пигментированных и непигментированных желёз. Число неполовозрелых и взрослых животных каждого вида было следующим: енотовидной собаки (n=4, n=15), лисицы (n=15, n=28) и песца (n=14, n=14 соответственно). Морфологические особенности ШЖ изучали гистологическими методами исследования, срезы окрашивали гематоксилином - эозином, а также по Массону-Фонтана. Результаты. В ШЖ исследованных видов обнаружены скопления пигмента меланина как на периферии железы, так и возле кровеносных сосудов. Визуально зафиксирована большая вариабельность пигментации желёз: от непигментированных до интенсивно пигментированных. На частоту встречаемости пигментированных желёз оказывали влияние возраст и видовая принадлежность. У енотовидных собак пигментированные эпифизы наблюдались только у неполовозрелых особей (25 %), у лисиц - только у взрослых (21,4 %). У песцов они были характерны для обеих возрастных групп, но с возрастом их доля снижалась (с 21,4 до 7,1 %). Выводы. Обнаружена широкая вариабельность степени пигментации ШЖ у псовых. Частота встречаемости пигментированных ШЖ характеризуется видоспецифичностью и зависит от возраста животных. Objective - to study the presence of melanin in the pineal gland (PG) and to assess the frequency of the pigmented glands occurrence in Canidae of different age groups. Material and methods. The objects of the research were raccoon dog (Nyctereutes procyonoides Grey), fox (Vulpes vulpes L.) and Arctic fox (V. lagopus L.). In immature (6-8 months) and adult (1,5-3,5 years) females of each species, the presence of the PG pigmentation was visually assessed and the proportion (%) of the pigmented and non-pigmented PG was calculated. The number of immature and adult animals was as follows: raccoon dog - n=4, n=15, fox - n=15, n=28, Arctic fox - n=14, n=14, accordingly. PG morphology was studied by histological methods; the sections were stained with hematoxylin and eosin and according to Masson-Fontana technique. Results. Clusters of melanin in the PG of studied species were located both on the periphery of the gland and near the blood vessels. The great variability of the PG pigmentation was detected. The age and the species membership affected the frequency of pigmented PGs findings. In raccoon dogs pigmented PGs were observed in immature individuals only (25 %), in foxes - in adults only (21,4 %). In blue foxes pigmented PGs were characteristic of both age groups, but with age their proportions decreased (from 21,4 to 7,1 %). Conclusions. A great variability in the degree of PG pigmentation was demonstrated. The frequency of the pigmented glands occurrence in Canidae is species-specific and depends on the age of the animals.

The diet of feral raccoon dog (Nyctereutes procyonoides) and native badger (Meles meles) and red fox (Vulpes vulpes) in Denmark

2018 ◽  
Vol 63 (4) ◽  
pp. 405-413 ◽  
Author(s):  
Morten Elmeros ◽  
Dorthe Malene Götz Mikkelsen ◽  
Louise Solveig Nørgaard ◽  
Cino Pertoldi ◽  
Trine Hammer Jensen ◽  
...  
Keyword(s):  
Vulpes Vulpes ◽  
Red Fox ◽  
Meles Meles ◽  
Nyctereutes Procyonoides ◽  
Raccoon Dog
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