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-====== Sex, death and silence in hawaiian crickets ======
-Wiki of the practical exercise of the [[III Southern-Summer School on Mathematical Biology|http://www.ictp-saifr.org/?page_id=4634]].
-Here you find the exercise assigment and the group's products.
-If you are a group member login to edit this page, create new pages from that, and upload files.
-Males of many crickets species use calling songs as sexual signals.
-Females locate and select singing males even in the dark of
-night, and can be very choosy in their mating preferences.
-This is indeed the business as usual in
-many populations of the Pacific field cricket, //Teleogryllus
-  oceanicus//, but not in Hawaii, where there is a deadly enemy, the fly
-//Ormia ochracea//. The fly is a parasitoid that uses song to find
-and lay larvae on the singing males.
-The larvae then find their way inside the bodies
-of the unfortunate singers and
-feast on their internal tissues, eventually killing the host.
-In 2006 Marlene Zuk and collaborators documented the rapid spread of
-a silent male morph in a population of //Teleogryllus
-  oceanicus// in Kauai Island, Havaii.
-The morph is called 'flatwings'
-as it lacks the wing structures used to produce songs.
-The change is caused by a single gene in the sexual chromosome
-of males.
-Flatwing males escape from the parasitoid, but also are not found
-by females. They have a 'satellite' sexual behavior -- to
-attempt to mate females that are attracted by calling males.
-Currently about 90% of the male crickets in Kauai were
-of the flatwing morph. Such a huge proportion of silent satellites
-rely on the few remaining singing males to reproduce.