8 animals that don’t practice safe sex

2014-03-17 14:09

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Cape Town – As a species human beings are obsessed about sex, it’s hard to believe that some species find the whole sex think far from fun.

Two new papers on reproduction say that for some species sex is a war zone involving a dance to the death. Here is a list of eight animals that don't practice safe sex. 

Number one

A zoologist in 1897 named Constantino Ribaga discovered an organ in female bedbugs in their abdomen. The scientist at first thought that the organ was used to produce sound however it was later discovered that a bundle of cells beneath the organ had large amounts of sperm.

In 1913 scientist observed a male bedbug stabbing a female with a syringe like penis in order to inseminate the female with sperm. This process was termed traumatic insemination.

In a paper by Rolanda Lange at the University of Sheffield it is argued that similar behaviour can be seen by other invertebrates.

Number two

Snails are hermaphrodites and during sex they secrete mucus known as a love dart that is blasted at potential mates. Scientists observed that the female role (the snail who receives the blast) is the role most snails avoid.

Snail

Number three

Sea slugs play a game of penis fencing, where each slug tries to stab the other with its penis in order to inseminate the other with sperm.

In a paper by Nik Tatarnic from the Western Australian Museum it suggests that stabbing by arthropods is a game-changing tactic used by males.

Insemination is just part of the mating process, fertilisation is more crucial and females need to control who fertilises their eggs and when this happens.

Some females are so successful at choosing which sperm fertilises their eggs, it’s unbelievable. For example some females use their reproductive tract to screen the sperm they want or even purposefully close their entire tract.

This process mostly occurs in insects where the females hold on to the sperm is special sacs.

Males obviously want the females to fertilise their eggs with its sperm so they have to win the female over by courtship or by doing outlandish acts like blocking the females up or scooping a rival’s sperm out.

Number four

A Male fruit fly does something really interesting; he spikes the female with his sperm so that she is drugged into releasing more eggs even though this shortens the female’s life.

Fruit fly

Number five

Female wood mice have mucus that prevents weak sperm from coming near their eggs so the male mice team up and create a long snake that pushes one sperm through the mucus.

Number six

The male myzostoma worm lets out a corrosive enzyme that burns a hole into the females skin so the male can inseminate her with his sperm.

Number seven

The Giant male squid squirts huge sperm packets that become attached to the arms of the female.

Giant squid

Number eight

Male harpactea sadistica spiders bite the females then inject their semen into the wound with their penis.
Read more on:    cape town  |  animals

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