Shape Variability in the Skull of Long-tailed Chinchilla (Chinchilla laniger, Molina 1782) Part 1. Cranial Angles
Ładowanie...
Pliki
Data
2014
Tytuł czasopisma
ISSN czasopisma
Tytuł tomu
Wydawca
Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie
Abstrakt
Celem badań było oszacowanie wielkości zmian wartości kątów czaszki
szynszyli małej w okresie wzrostu i rozwoju oraz porównanie wartości ustalonych dla osobników
dorosłych zwierząt hodowlanych z wynikami pomiarów czaszek zwierząt bytujących
w warunkach naturalnych. Badaniami objęto czaszki hodowlanych 319 samców i samic
szynszyli małej w sześciu okresach życia, obejmujących wiek od 1 do ponad 800 dni oraz
32 czaszki zwierząt dorosłych pochodzące z Muzeum Historii Naturalnej w Londynie. Czaszki
sfotografowano, na fotografiach wyznaczono 12 kątów wyprowadzonych z punktów stałych
czaszki. Różnice między grupami oraz współzależności między cechami szacowano modułami
z programu Statistica 9 v.Pl. W wyniku badań stwierdzono, że pomimo różnych warunków
życia, okres około stuletniej hodowli nie wykreował nowego morfotypu dla tego gatunku gryzoni.
The aim of this study was to estimate the magnitude of changes in the values of cranial angles in long-tailed chinchilla during growth and development and comparing the values being determined for adult farm animals with the results of cranial measurements in animals living under natural conditions. The research material comprised 319 skulls of farm male and female long-tailed chinchillas in six periods of life, covering the age from 1 day to more than 800 days, and 32 skulls of adult animals from the Natural History Museum in London. The skulls were photographed and 12 angles led from fixed cranial points were determined on photographs. Differences between groups and correlations between traits were estimated by the modules of Statistica v.9 PL software package. As a result of the study, it was found that the period of approximately one hundred years of breeding did not create a new morphotype for that rodent species despite different living conditions.
The aim of this study was to estimate the magnitude of changes in the values of cranial angles in long-tailed chinchilla during growth and development and comparing the values being determined for adult farm animals with the results of cranial measurements in animals living under natural conditions. The research material comprised 319 skulls of farm male and female long-tailed chinchillas in six periods of life, covering the age from 1 day to more than 800 days, and 32 skulls of adult animals from the Natural History Museum in London. The skulls were photographed and 12 angles led from fixed cranial points were determined on photographs. Differences between groups and correlations between traits were estimated by the modules of Statistica v.9 PL software package. As a result of the study, it was found that the period of approximately one hundred years of breeding did not create a new morphotype for that rodent species despite different living conditions.
Opis
Słowa kluczowe
angle, chinchilla, geometry, measurements, skull, czaszka, geometria, kąty, pomiary, szynszyle
Cytowanie
Baranowski P., Wróblewska M., Pęzińska-Kijak K.(2014). Shape Variability in the Skull of Long-tailed Chinchilla (Chinchilla laniger, Molina 1782) Part 1. Cranial Angles. Folia Pomer. Univ. Technol. Stetin., Agric., Aliment., Pisc., Zootech. 309 (29), 5–14.