Depopulation of cockroaches in post-Soviet states

A mass depopulation of cockroaches has been observed since the beginning of the 21st century in Russia and other countries of the former USSR. Observers note quick disappearance of various types of cockroaches from cities and towns in Russia, Azerbaijan, Kazakhstan, Ukraine, Moldova, and Belarus.

Possible explanations

The depopulation of cockroaches may be exaggerated, or this phenomenon may be temporary or cyclic.^[1][2] Theories advanced for possible factors in the decline in population include:

• Usage of plastic bags to store domestic waste and the discontinuation of rubbish chutes usage.^[3]
• Cockroaches may have migrated out of homes to other, more suitable places.^[4][5]
• New, improved chemicals and methods to fight cockroaches may have led to migration, or direct depopulation.^[6][7][8]
• Usage of modern construction materials may also contribute to the phenomenon; the population of cockroaches might have been reduced due to their purported ingestion of unsafe substances.^[9][10][11] However, cockroaches were noticed to disappear even in the houses where such construction materials were not used.^[12]
• The emergence of Pharaoh ants, who compete with the cockroaches for food, and may even feed on them.
• The introduction of genetically modified food might have a negative influence on cockroaches.^[13]
• Radioactive or chemical pollution (in Chernovtsy, Tambov, as well as due to Chernobyl disaster) may also be a factor,^[1] although there is an opinion that cockroaches are insensitive to radiation.^[9]
• Widespread introduction of mobile phones and wireless networks might have a negative effect on the cockroaches.^[3][10]
• Ozone holes may also lead to abnormal biorhythms in cockroaches.^[10][11]
• Internal competitions between cockroaches may decrease the number of cockroaches.^[3]

It is also possible that a "perfect storm" with several of these factors may be the reason why the cockroach population has decreased.

Scientific attention to the problem

Scientists from Chelyabinsk and Yekaterinburg have suggested that the Oriental cockroach should be added to the Red Book of Endangered Species.^[14][15]

See also

• Colony collapse disorder, bees

References

1. Исчезновение тараканов на Белгородчине не связано с радиацией :: ИА Бел.Ру - Новости Белгорода он-лайн (in Russian). Bel.ru. Retrieved 2010-08-23.
2. Alexandr Goncearenco neksa neksa.net. "Архив за 02.06.2006 - "Независимая Молдова"". Nm.md. Retrieved 2010-08-23.
3. "Газета Русский Курьер :: Тараканы в бегах". Ruscourier.ru. Retrieved 2010-08-23.
4. "Тараканы бегут из Украины". Pk.kiev.ua. 2007-11-07. Retrieved 2010-08-23.
5. В Алмате вернулись тараканы
6. "Факторы, вызвавшие исчезновение тараканов, могут привести к гибели человечества". Asfera.info. 2009-01-28. Retrieved 2010-08-23.
7. "3 канал - Главная тема. Итоги". 3channel.ru. 2008-04-21. Retrieved 2010-08-23.
8. "Тараканы в опасности". News.ntv.ru. Retrieved 2010-08-23.
9. "Украинские ученые озабочены исчезновением тараканов » Наука и здоровье » Корреспондент". Korrespondent.net. 2009-01-29. Retrieved 2010-08-23.
10. Большой город (in Russian). Bg.ru. Retrieved 2010-08-23.
11. Задумайтесь: куда исчезли тараканы?. "Задумайтесь: куда исчезли тараканы?". Greenword.ru. Retrieved 2010-08-23.
12. "Почему из российских городов сбежали тараканы Doronchenko.ru - интересные обзоры интернета". Doronchenko.ru. 2006-06-19. Retrieved 2010-08-23.
13. "Тараканы в Москве исчезают, а собаки - умнеют, выяснили ученые". Palm.newsru.com. Retrieved 2010-08-23.
14. "Российские экологи бьют тревогу: исчезающих из домов тараканов хотят переселить в Красную книгу". Newsru.com. 21 April 2008. Retrieved 2010-08-23.
15. "Тараканы вымирают : Насекомых занесут в Красную книгу". Weekend.rbcdaily.ru. 2008-04-18. Retrieved 2010-08-23.