Morphology and morphometry of the nuchal plane of breeding chinchilla [Chinchilla laniger, Molina 1782] skulls allowing for sex and litter size at birth

• Autorzy: Baranowski P , Wroblewska M. , Wojtas J.
• Języki publikacji: EN

Abstrakty

EN

The aim of the investigation was to determine the effect of sex and litter size at birth on the values of selected metric traits of breeding chinchilla skulls. Eighty-six chinchillas of both sexes, aged 12 months, kept under similar nutrition and care conditions, were used in the study. The skull's weight was determined, as well as 14 craniometrical traits of the braincase and the splanchnocranium. The volume of the rteurocranium and the area of the foramen magnum surface were determined, and the cranial index was estimated. The basic statistical measurements and the simple, parietal, and semi-parietal correlations between selected traits of the nuchal plane were estimated. The sex and litter size at birth were not the source for variations in the traits: A-P, B-P, A-N, N-P, Zyg- Zyg, Eu-Eu. A significant effect (P≤0.01) of sex of the chinchilla on the height of the squama occipitael bone and the foramen magnum index was found. The inherence of the statistical significance in parietal and semi-parietal correlations for the selected nuchal plane of the skull confirms the necessity of making allowances for sex in craniometric research, as well as for litter size at birth in the case of estimating the values of the metric traits in the skulls of animals coming from multiple litters.

Słowa kluczowe

EN

chinchilla; animal breeding; Chinchilla lanigera; morphology; morphometry; skull; sex; litter size; craniometry; birth; foramen magnum area; surface; cranial index

• Wydawca: -
• Czasopismo: Bulletin of the Veterinary Institute in Puławy
• Rocznik: 2009
• Tom: 53
• Numer: 2
• Opis fizyczny: p.291-298,fig.,ref.

Twórcy

autor

Baranowski P

• Agricultural University, 71-466 Szczecin, Poland

autor

Wroblewska M.

autor

Wojtas J.

Bibliografia

• 1. Baranowski P., Wojtas J., Cis G., Musiał M., Wróblewska M., Sulik M.: Value of craniometrical traits in chinchillas (Chinchilla laniger) skulls considering teeth defects. Bull Vet Inst Pulawy 2008, 52, 271-280.
• 2. Berry A.C., Berry R.J.: Epigenetic variation in the human cranium. J Anat 1967, 101, 361-379.
• 3. Gittleman J.L.: Sexual dimorphism in the canines and skulls of carnivores: effects of size, phylogeny, and behavioural ecology. J Zool (London) 1997, 242, 97-117.
• 4. Günay Y., Altinkök M.: The value of the size of foramen magnum in sex determination. J Clin Forensic Med 2000, 7, 147-149.
• 5. He T., Friede H., Kiliardis S.: Macroscopic and roentgenographic anatomy of the skull of the ferret (Mustela putorius furo). Lab Anim 2002, 36, 86-96.
• 6. Janeczek M., Chrószcz A., Onar V., Pazvant G., Pospieszny N.: Morphological analysis of the foramen magnum of dogs from the Iron Age. Anat Histol Embryol 2008, 37, 359-361.
• 7. Kauhala K., Viranta S., Kishimoto M., Helle E., Obara I.: Skull and tooth morphology of Finnish and Japanese raccoon dogs. Ann Zool Fennici 1998, 35, 1-16.
• 8. Lee S., Mill P.J., Cranial variation in British mustelids. J Morphol 2004, 260, 57-64.
• 9. Lynch J.M., Whelan R., Il Fituri A.I., Hayden T.J.: Craniometric variation in the Eurasian badger, Meles meles. J Zool Lond 1997, 242, 31-44.
• 10. Onar V.: A morphometric study on the skull of the German shepherd dog (Alsatian). Anat Histol Embryol 1999, 28, 253-256.
• 11. Rösing, F. W.: Discreta des menschlichen Skeletts - ein kritischer Überblick. Homo 1982, 33, 100-125.
• 12. Simoens P., Poels P., Lauwers H.: Morphometric analysis of foramen magnum in Pekingese dogs. Am J Vet Res 1994, 55, 34-39.
• 13. Spotorno A.E., Zuleta C.A., Valladares J.P., Deane A.L., Jiménez J.E.: Chinchilla laniger. Mammalian Spec 2004, 758, 1-9.
• 14. Trouth C.O., Winter S., Gupta K.C., Mills R.M., Holloway J.A.: Analysis of sexual dimorphism in the occipital portion of the dog skull. Acta Anat 1977, 98, 467-473.
• 15. Watson A.G., de Lahunta A., Evans H.E.: Dorsal noch of foramen magnum due to incomplete ossification of supraoccipital bone in dog. J Small Anim Pract 1989, 30, 666-673.