I fitted a linear model of speed as a function of pairing status to compare movement speed between copulating
pairs and unpaired individuals.
The direct benefit for the male to stand guard is the reduction of the probability of the female copulating
with other males prior to oviposition and thus, cause elimination or dilution of the sperm.
Whenever a copulating
pair was seen, behaviors were recorded.
Observations of mating behavior when the sexes vary greatly in size.--In contrast to when adults are of similar body size (see Introduction), males that differ greatly in size from females often have difficulty copulating
. When the female is longer than the male, he may place his hind-leg tarsi on her ventral abdominal surface, posterior to her hind coxae, or he may anchor under the caudal edge of sternal plate 7.
The test females were mature and had laid three successive egg sacs without copulating
in between before they were used in these experiments.
Belt buckle cast in low relief with two ibex copulating
Bronze with green patina.
He's got a bunch, though he rarely distills much flavor from them: At a state dinner for Queen Elizabeth II, the Captain and Tennille sang "Muskrat Love," a song about copulating
As for Milton sharing the libertines' "sexual mockery of authority" by imagining Charles I copulating
with his mother: well, I thought the source was Suetonius.
Whose interests were best served by belief in witches copulating
with demons and stealing priests' penises?
They chose to run two quarter-sized photos of a copulating
The film, which is available to rent on DVD and video now, sees one of Hollywood's most famous killers - Michael Myers - resurrected yet again to slash his way through a house full of copulating
teenagers, who've all won the chance to be a part of a live reality TV show.
"Natureza em Oposicao a Graca" (Nature in opposition to grace) is the story of a young man who kills his rival and drinks of his blood when he discovers he had been betrayed; and in "Encentres e Desencontros" (Encounters and missed encounters), we read the account of a man who insists on copulating
with a woman who happens to be menstruating as a way of demonstrating his unselfish love for her.