scholarly journals Morphometric Characteristics of the Spermatozoa of Blue Fox (Alopex lagopus) and Silver Fox (Vulpes vulpes)

Animals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1927
Author(s):  
Katarzyna Andraszek ◽  
Dorota Banaszewska ◽  
Olga Szeleszczuk ◽  
Marta Kuchta-Gładysz ◽  
Anna Grzesiakowska
Keyword(s):  
Vulpes Vulpes ◽  
Tail Length ◽  
Head Length ◽  
Head Width ◽  
Sperm Length ◽  
Alopex Lagopus ◽  
Silver Fox ◽  
Shape Indices ◽  
Length Width ◽  
Blue Fox

The results presented in this study are the first such extensive characterization of the sperm morphometry of the blue fox (Alopex lagopus) and silver fox (Vulpes vulpes), as representatives of the family Canidae. Canine spermatozoa, especially the sperm of farmed foxes, are not often described in studies on reproduction. The aim of the study was a detailed comparison of the morphometric dimensions and shape of the sperm of two fox species: silver fox and blue fox. Semen collected from 10 silver foxes and 10 blue foxes was used for the study. The specimens were stained with silver nitrate. Measurements were performed of the length, width, perimeter, and area of the head; the area of the acrosome and its coverage; the length of the midpiece and its coverage; the length of the tail; and the length of the end piece of the tail. In addition, four head shape indices were calculated: ellipticity, elongation, roughness and regularity. The following values for the morphometric parameters and shape indices were obtained for blue fox and silver fox, respectively: head length—6.72 µm and 6.33 µm; head width—4.54.µm and 4.21 µm; head perimeter—18.11 µm and 17.37 µm; head area—21.94 µm2 and 21.11 µm2; acrosome area—11.50 µm2 and 10.92 µm2; midpiece length—12.85 µm and 12.79 µm; tail end piece length—3.44 µm and 3.28 µm; tail length—65.23 µm and 65.09 µm; acrosome coverage—52.43% and 52.83%; midpiece coverage—19.71% and 19.65%; sperm length—71.95 µm and 71.42 µm; ellipticity—1.49 and 1.52; elongation—0.19 and 0.20; roughness—0.84 and 1.88; regularity—1.09 and 0.99. The significance of differences between species was verified by Tukey’s test at p ≤ 0.05. Statistically significant differences between species were found for the following parameters: head length, width, perimeter and area; acrosome area; tail, end piece, and total sperm length; roughness and regularity. The differences in the size and shape of sperm can be used to establish reference patterns for fox sperm enabling more accurate species identification.

Comparison between Microscopic and Automated Differential Leukocyte Counts in the Silver Fox (Vulpes vulpes) and the Blue Fox (Alopex lagopus)

1999 ◽  
Vol 28 (2) ◽  
pp. 65-70 ◽  
Author(s):  
Randi Oppermann Moe ◽  
Morten Bakken ◽  
Hege Brun-Hansen ◽  
Tormod Ådnøy ◽  
Hanne Morberg
Keyword(s):  
Vulpes Vulpes ◽  
Alopex Lagopus ◽  
Silver Fox ◽  
Leukocyte Counts ◽  
Blue Fox

scholarly journals Thermic Variation in Incubation and Development of Pantanal Caiman (Caiman crocodilus yacare) (Daudin, 1802) Kept in Metabolic Box

2002 ◽  
Vol 45 (3) ◽  
pp. 333-342 ◽  
Author(s):  
Maristela Parra Miranda ◽  
Gentil Vanini de Moraes ◽  
Elias Nunes Martins ◽  
Luis Carlos Pinto Maia ◽  
Orlando Rus Barbosa
Keyword(s):  
Regression Analysis ◽  
Tail Length ◽  
Head Length ◽  
Head Width ◽  
Snout Length ◽  
Temperature Range ◽  
Caiman Crocodilus ◽  
Total Length

Thirty-two eggs of Pantanal caiman (Caiman crocodilus yacare) (Daudin, 1802) were incubated at 30° C. After 20 days of incubation at 30° C, the remaining eggs were distributed in the following way: seven at 34° C, seven at 32° C, six at 30° C and six at 28° C. At 32° C and 34° C a 100% hatchability was obtained while at 30° C 83.3% and at 28° C 66.6%. After hatching, the animals were kept for 120 days at the same temperature of their final incubation. Weight (g) control and morphometric (cm) analysis were carried out. The statistic design was totally randomized and the data were treated by regression analysis showing a quadratic behavior ( p<0.05). It was found that weight, total length (TTL), tail length (TL), snout- vent length (SVL), head length (HL), eye length (EL), snout length (SL), mid-point snout width (MSW), head width (HW), width of snout at nostrils (NW), distance between limbs (DBL) showed a higher development at the temperature range from 31.2° C to 31.8° C and circumference of belly at 30.0° C.

Natural history of the New Caledonian whiptailed skink Tropidoscincus variabilis (Bavay, 1869) (Squamata: Scincidae)

2009 ◽  
Vol 30 (2) ◽  
pp. 207-220
Author(s):  
Ross Sadlier ◽  
Aaron Bauer ◽  
Hervé Jourdan ◽  
Glenn Shea
Keyword(s):  
New Caledonia ◽  
Tail Length ◽  
Late Summer ◽  
Head Length ◽  
Head Width ◽  
Ontogenetic Change ◽  
Positive Allometry ◽  
Wide Range ◽  
Depth Increase ◽  
One Year

AbstractTropidoscincus variabilis is a medium-sized, long-limbed and long-tailed skink from New Caledonia with strong ontogenetic change in coloration, juveniles being very brightly coloured. It is primarily an inhabitant of forested habitats, but also occurs in maquis heathlands. Mature females are similar in size to mature males, but have proportionally longer bodies and shorter heads and limbs, and a less brightly orange venter. Body length (axilla-groin length) increases in positive allometry to snout-vent length (SVL), while limb lengths and head length increase in negative allometry to SVL (except in males, where limb length increases isometrically). Head width and depth increase in positive allometry to head length, while tail length increases in isometry with SVL. Reproduction is seasonal in both sexes, with gonadal cycles peaking in late spring. Females lay 2-4 eggs in summer, and young hatch in late summer. More than one year of growth is required to attain maturity. Diet consists of a wide range of invertebrates, particularly arthropods, and with large numbers of spiders and crickets. Juveniles eat more spiders, bugs and isopods than adults. The long limbs and ontogenetic change in coloration of this species are not explained by its known biology.

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.

scholarly journals Sperm Morphology in Neotropical Primates

Animals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 839 ◽  
Author(s):  
Eliana R. Steinberg ◽  
Adrián J. Sestelo ◽  
María B. Ceballos ◽  
Virginia Wagner ◽  
Ana M. Palermo ◽  
...  
Keyword(s):  
Sperm Morphology ◽  
Tail Length ◽  
Primate Species ◽  
Head Width ◽  
Sperm Length ◽  
Neotropical Primates ◽  
Evolutionary Changes ◽  
Sperm Morphometry ◽  
Morphometric Characterization

The morphological and morphometric characterization of spermatozoa has been used as a taxonomic and phylogenetic tool for different species of mammals. We evaluated and compared the sperm morphometry of five neotropical primate species: Alouatta caraya, Ateles belzebuth and Ateles chamek of family Atelidae; and Cebus cay (=Sapajus cay) and Cebus nigritus (=Sapajus nigritus) of family Cebidae. After the collection of semen samples, the following parameters were measured on 100 spermatozoa from each specimen: Head Length, Head Width, Acrosome Length, Midpiece Length, Midpiece Width and Tail Length. Considering the available literature on sperm morphometry, we gathered data of 75 individuals, from 20 species, 8 genera and 2 families. These data were superimposed on a phylogeny to infer the possible direction of evolutionary changes. Narrower and shorter spermatozoa seem to be the ancestral form for Cebidae, with a trend toward wider and larger heads in derived groups. The spermatozoa of Atelidae may show an increase in total length and midpiece length. Sperm heads would have become narrower in the more derived groups of Ateles. Sperm length may increase in the more derived species in both families. Our results are discussed in the context of sperm competition and sexual selection.

scholarly journals Morphometric characterization of Katjang goat of Malaysia

2017 ◽  
Vol 45 (3) ◽  
pp. 17-24
Author(s):  
MAMY Khandoker ◽  
M Syafiee ◽  
MSR Rahman
Keyword(s):  
Body Weight ◽  
Body Length ◽  
Tail Length ◽  
Head Length ◽  
Head Width ◽  
Strong Positive Correlation ◽  
Leg Length ◽  
Scrotal Circumference ◽  
Morphometric Characterization

Morphometric characterization of Katjang goat in Malaysia is important for conservation and for further genetic improvement. With this idea in view the present study was carried out to characterize the morphometry and to estimate the relationship among the important morphometric traits of indigenous Katjang goat. The study was conducted at the Faculty of Sustainable Agriculture (FSA), surrounding area of FSA Sandakan, Sabah and Batu Pahat, Johor in Malaysia. Characteristics of body weight (BW), body length (BL), heart girth (HG), wither height (WH), hip height (HH), fore leg length (FLL), hind leg length (HLL), head length (HeL), head width (HW), ear length(EL), ear breadth (EB), tail length (TL), scrotal length (SL) and scrotal circumference (SC) were gathered. In a single parameter as body weight of Katjang bucks at below 1 year, 1-2 year and > 2 years ages were recorded to be 7.41 ± 0.27, 14.20±0.20 and25.83 ± 0.99 kg, respectively. On the hand, body weight of Katjang does at 1-2 year and > 2 years ages were observed to be 12.41 ± 0.41 and 23.65±0.87 kg, respectively. In both sexes, head length, head width, tail length, ear length, ear breath, body weight, body length, hearth girth, wither height, leg length, hip height increases with the increment of the age of goat. On the other hand, all the parameters contemplated found comparatively higher in bucks than that of does.  Strong positive correlation was observed between scrotal length and scrotal circumference in Katjang bucks.Bang. J. Anim. Sci. 2016. 45 (3): 17-24

Karyotypic kinship between the blue fox (Alopex lagopus Linn.) and the silver fox (Vulpes fulvaDesm.)

1983 ◽  
Vol 35 (3) ◽  
pp. 190-194 ◽  
Author(s):  
M.A. Yoshida ◽  
N. Takagi ◽  
M. Sasaki
Keyword(s):  
Alopex Lagopus ◽  
Silver Fox ◽  
Blue Fox

scholarly journals Application of two staining methods for sperm morphometric evaluation in domestic pigs

2017 ◽  
Vol 61 (3) ◽  
pp. 345-349 ◽  
Author(s):  
Stanisław Kondracki ◽  
Anna Wysokińska ◽  
Magdalena Kania ◽  
Krzysztof Górski
Keyword(s):  
Genetic Factors ◽  
Tail Length ◽  
Head Width ◽  
Sperm Cells ◽  
Sperm Length ◽  
Shape Parameters ◽  
Domestic Pigs ◽  
Staining Methods ◽  
Morphometric Evaluation ◽  
Head Area

Abstract Introduction: The effect of two smear staining methods on the dimensions and shape of sperm cells in the semen of domestic pigs was evaluated. Material and Methods: The studies were carried out on 30 ejaculates collected from 15 boars, which included five Duroc boars, five Pietrain boars, and five hybrid Duroc × Pietrain boars. Each ejaculate was next sampled to make two microscopic slides, of which one was stained with eosin-nigrosin and the other with eosin-gentian dye. In total, 600 measurements of sperm cells were made. Each sperm was measured for the following morphometric parameters: head length, head width, head area, head perimeter, tail length, and the total sperm length. Results: Sperms measured on slides stained with eosin-nigrosin showed lower dimensions as compared with those stained with the eosin-gentian dye method. Sperm stained with eosin-nigrosin had shorter and narrower heads than sperm stained with eosin-gentian dye. The method of staining, therefore, affected not only the dimensions of the sperm, but also the proportions of the dimensions defining the shape of the sperm. Conclusions: The size and shape parameters in porcine sperm may take on different values depending on the method of semen staining. Sperm cells stained with eosin-nigrosin are smaller than the sperm stained with eosin-gentian dye. The sensitivity of the sperm to the type of dye used for the fixation may be associated with genetic factors.

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