Šumarski list, Vol. 133 No. 9-10, 2009.
Izvorni znanstveni članak
CraniometricalAnalysis and Determination of Sexual Dimorphism in Brown Bear (Ursus arctos L.) from Croatia
Vladimir Farkaš
; Vladislavci
Tomislav Gomerčić
; Veterinarski fakultet Sveučilišta u Zagrebu
Magda Sindičić
orcid.org/0000-0002-1391-3648
; Veterinarski fakultet Sveučilišta u Zagrebu
Vedran Slijepčević
; Petrinja
Đuro Huber
; Veterinarski fakultet Sveučilišta u Zagrebu
Alojzije Frković
; Rijeka
Sanja Modrić
; Food and Drug Administration, Rockville, SAD
Sažetak
Family of bears (Ursidae) have a potential to exhibit various characteristics under the influence of environment and nutrition. The goal of this paper was to analyze craniometrical measurements of brown bear (Ursus arctosL.) population from Croatia with objectives to define them, as well as to determinate differences between sexes. A total of 34 skulls have been
V. Farkaš, T. Gomerčić, M. Sindičić, V. Slijepčević, Đ. Huber, A. Frković, S. Modrić: KRANIOMETRIJSKA... Šumarski list br. 9–10, CXXXIII (2009), 527-537
studied, out of which 13 (38,24 %) belonged to female animals, 20 (58,83 %) to males, while sex was not identified for one (2,93 %) skull. All skulls belonged to adult animals, with the average age of 8,4 years (range 3 to 20 years). A total of 49 measurements were taken on each skull with the 0,1 mm precision, so totally 829 craniometrical measurements have been statistically analyzed. Statistically significant difference between the sexes has been observed in 42 (85,72 %) cra niometrical measurements, while for totally 16 (32,65 %) measurements it has been observed that males are absolutely bigger than the female bears (meaning that the smallest males were bigger than the biggest females). For those 16 measures we have defined border values that could help in sex determination. Correlation and equation of regression were calculated for total length of skull and zygomatic breadth. Corelation was r = 0,7961 for male bears and r = 0,6812 for females, while equaton of regression for calculation of zygoma tic width using total skull length was: for males - zygomatic width = 0,8365 total skull length - 79,105; for females – zygomatic width = 0,6867 total skull length - 31,247. In comparison of skull features of bears from Croatia with the ones from Slovakia we have found that male bears were almost the same while Croatian females were smaller. Bears in Croatia were smaller than the ones in Romania but the differences among males were smaller, while the females were significantly larger in Romania.
Ključne riječi
brown bear; craniometry; Croatia; sex dimorphism; skull; Ursus arctos
Hrčak ID:
42441
URI
Datum izdavanja:
31.10.2009.
Posjeta: 1.949 *