sperm.comp2 {gamair}R Documentation

Sperm competition data II

Description

Data relating average number of sperm ejaculated per copulation to physical characterisics of partners involved, for 24 heterosexual couples from Manchester, UK.

Usage

data(sperm.comp2)

Format

A data frame with 10 columns and 24 rows. The columns are:

pair

an identifier for the couple. These labels correspond to those given in sperm.comp1.

n

the number of copulations over which the average sperm count has been calculated.

count

the average sperm count in millions, per copulation.

f.age

age of the female, in years.

f.height

height of the female, in cm.

f.weight

weight of the female, in kg.

m.age

age of the male, in years.

m.height

height of the male, in cm.

m.weight

weight of the male, in kg.

m.vol

volume of one male teste in cubic cm.

Details

In the source article, these data are used to argue that males invest more reproductive effort in heavier females, on the basis of regression modelling. It is worth checking for outliers.

Source

Baker, RR and Bellis M.A. (1993) 'Human sperm competition: ejaculate adjustment by males and the function of masturbation'. Animal behaviour 46:861-885


[Package gamair version 1.0-2 Index]