Miscellaneous 2019

Is The Sexual Dimorphism Of The Olfactory Bulb The Same In Different Mink Races (Neovison Vison Var. Spec.) ?

{Sexual differences are observed in many neural structures, including the olfactory bulb. However, the olfactory bulb structure is also influenced by genetic variations defining the coat color. So we were interested if the sexual dimorphism of the olfactory bulb is the same in the different races of the American mink. Therefore we investigated the absolute volume of the different layers in both sexes of four color variations in the mink (\textquotedblleftstandard\textquotedblright Neovison vison var. atratus, a; \textquotedblleftsilverblue\textquotedblright Neovison vison var. glaucus, g; \textquotedblleftpastel\textquotedblright Neovison vison var. suffuscus, s ; \textquotedblleftwild\textquotedblright Neovison vison var. carinum, c). The results show that the absolute volume of the olfactory bulb is smaller in females (f) compared to males (m) in all races with values of 71-81\textpercent (f/m). The sex ratio of the different layers however show a much greater variation among the races. The fila layer of atratus females has only 46\textpercent of the male volume whereas the other races have 60-62\textpercent. In the glomerular layer, atratus females have 71\textpercent compared to 82-90\textpercent in suffuscus and glaucus. The external plexiform layer has higher sex ratios of 84-88\textpercent in a and g versus 76\textpercent in s and c. The most striking effects are seen in the IPL and subependymal layer where suffuscus females have even higher volumina than males (104-110\textpercent) while the other races have values of 51-81\textpercent in the IPL and 72-89\textpercent in the subependymal layer. The sex ratio of the granule cell layer is 94-97\textpercent in a and s versus 75-86\textpercent in c and g. The stratum album sex ratio is 67-74\textpercent in a and c versus 80-88\textpercent in s and g. The results indicate that there is no uniform sexual dimorphism but the genetic factor of the race is inducing a layer-specific sexual dimorphism.}

Author(s): Bennegger, W and Weiler, E
Journal: {Chemical Senses}
Volume: 44
Pages: e44--e45
Year: 2019
Publisher: Oxford University Press [etc.]
Bibtex Type: Miscellaneous (misc)
Address: Oxford
DOI: 10.1093/chemse/bjz035
Electronic Archiving: grant_archive

BibTex

@misc{item_3038446,
  title = {{Is The Sexual Dimorphism Of The Olfactory Bulb The Same In Different Mink Races (Neovison Vison Var. Spec.) ?}},
  journal = {{Chemical Senses}},
  abstract = {{Sexual differences are observed in many neural structures, including the olfactory bulb. However, the olfactory bulb structure is also influenced by genetic variations defining the coat color. So we were interested if the sexual dimorphism of the olfactory bulb is the same in the different races of the American mink. Therefore we investigated the absolute volume of the different layers in both sexes of four color variations in the mink (\textquotedblleftstandard\textquotedblright Neovison vison var. atratus, a; \textquotedblleftsilverblue\textquotedblright Neovison vison var. glaucus, g; \textquotedblleftpastel\textquotedblright Neovison vison var. suffuscus, s ; \textquotedblleftwild\textquotedblright Neovison vison var. carinum, c). The results show that the absolute volume of the olfactory bulb is smaller in females (f) compared to males (m) in all races with values of 71-81\textpercent (f/m). The sex ratio of the different layers however show a much greater variation among the races. The fila layer of atratus females has only 46\textpercent of the male volume whereas the other races have 60-62\textpercent. In the glomerular layer, atratus females have 71\textpercent compared to 82-90\textpercent in suffuscus and glaucus. The external plexiform layer has higher sex ratios of 84-88\textpercent in a and g versus 76\textpercent in s and c. The most striking effects are seen in the IPL and subependymal layer where suffuscus females have even higher volumina than males (104-110\textpercent) while the other races have values of 51-81\textpercent in the IPL and 72-89\textpercent in the subependymal layer. The sex ratio of the granule cell layer is 94-97\textpercent in a and s versus 75-86\textpercent in c and g. The stratum album sex ratio is 67-74\textpercent in a and c versus 80-88\textpercent in s and g. The results indicate that there is no uniform sexual dimorphism but the genetic factor of the race is inducing a layer-specific sexual dimorphism.}},
  volume = {44},
  pages = {e44--e45},
  publisher = {Oxford University Press [etc.]},
  address = {Oxford},
  year = {2019},
  slug = {item_3038446},
  author = {Bennegger, W and Weiler, E}
}