Statistical Bioinformatics project.
The main project is investigating the sexual dimorphism in penguins using palmer penguins dataset. Statistical analyses were performed and visualized in R markdown.
This research aimed at examining discernible variations in physical traits between male and female members of the Gentoo penguins (Pygoscelis papua). Measurements of body mass, bill length, bill depth and flipper length were considered for sexual dimorphism. Shapiro Wilk test revealed male bill length (p<0.05) and male flipper length (p<0.05) to be non-normally distributed. Fisher’s Exact Test revealed significant difference of traits among sexes (p<0.0001). Strong effect size of sex on body mass (Cramer’s V = 0.79), bill length (Cramer’s V = 0.65), and bill depth (Cramer’s V = 0.72) and flipper length (Cramer’s V = 0.71). Pearson residuals showed strong association between sex and these four traits, body mass and bill length were the strongest.
Some sample figures from the report:
Summary of Gentoo Features Data Distribution Description
Bill depth of males and females. Association of the sexes with body weight categories was examined. For this, pearson residuals for six different associations could be considered among sexes and three categories. A positive association is demonstrated with a positive blue bar, and a negative association is demonstrated with a negative red bar. The intensity of the color suggests stronger association.
Paired up association of Gentoo features Summary
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