Chemical communication between female rats exists and is complex
Jun 2023, phys.org
I'm just here because today I learned that mice urine and rat urine are very different:
At this point, MUP (major urinary proteins) enter into play. MUPs are key in the transmission of odors through marks, yet function differently in mice (found in the urine with which they mark) as opposed to rats (whose marks contains sebaceous secretions, in addition to urine).But the research found that a variety of these scent marking proteins came from the clitoral glands of the females, and we didn't know that before. ... the combination of urine and the secretion from the clitoral glands is necessary for the marks of the females to arouse interest in other females.
via University of Córdoba, University of Liverpool: Guadalupe Gómez-Baena et al, Unraveling female communication through scent marks in the Norway rat, Proceedings of the National Academy of Sciences (2023). DOI: 10.1073/pnas.2300794120
Post Script: Scent marking in rats has been studied in depth when it comes to males, but, in the case of females, there's a knowledge gap.
Image credit: AI Art - British Grandma on the Phone - 2024
Hand odor can reveal a person's sex, study shows
Jul 2023, phys.org
https://phys.org/news/2023-07-odor-reveal-person-sex.html
Statistical analysis and mass spectrometry analyze the volatile scent compounds present on the palms of 60 individuals - half male and half female predicted a person's sex with a 96.67% accuracy rate.
via Florida International University: Multivariate regression modelling for gender prediction using volatile organic compounds from hand odor profiles via HS-SPME-GC-MS, PLoS ONE (2023). DOI: 10.1371/journal.pone.0286452
Post Script: On Handshakes and Animal Behavior, 2021
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