The pair would call briefly and fly together to a foraging area when copulations
occurred just after sunrise.
They then "project" their penises and each insert them into the other's vagina and start copulation
How soon a plug forms after copulation
is unclear because round-tailed ground squirrels were never seen copulating above ground.
These include: (1) absence of courtship, (2) initiation of copulation
by males, (3) short duration of copulation
(often less than 10 min), (4) postcopulatory guarding by males, and (5) polygamous copulation
by females on short timescales.
In the present study we investigate the mating behavior of a tetrablemmid spider and compare the copulation
duration of first and second copulations
Here, we explore this possibility by measuring hatching success in relation to sexual cannibalism and in relation to the number and duration of copulations
In some species after sperm transmission, males create mating plugs in the genital opening of the female to prevent further copulations
(Masumoto 1993; Knoflach 1998).
This coercive behavior, associated with repeated copulations
, is possibly another male strategy to increase paternity and the number of eggs that one female will lay inside the nest.
and mate guarding in the polyterritorial pied flycatcher, Ficedula hypoleucia.
We also calculated Pearson's correlation coefficient (r) between each variable and the proportion of all and successful copulations
each male obtained on its' respective lek.
However, we determined that when in competition, the smaller of the two males performed homosexual copulations
at a significantly higher rate than the larger of the two males (paired t-test, t = 1.
We quantified the number and timing of copulations
We conclude that female pigeons trade pair copulations
for protection (mate guarding) against sexual harassment from other males," the researchers say.
For extra-pair males however, the copulations
are a win-win with the male increasing its reproductive success with limited investment, he says.
In total, the courtship behavior and copulations