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Depopulation of cockroaches in post-Soviet states

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Depopulation of cockroaches in post-Soviet states refers to observations that there has been a rapid disappearance of various types of cockroaches since the beginning of the 21st century in Russia and other countries of the former USSR. Various factors have been suggested as causes of the depopulation.

Background

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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[who?] have noted a rapid disappearance of various types of cockroaches from cities and towns in Russia, Azerbaijan, Kazakhstan, Ukraine, Moldova, and Belarus.[citation needed] However, no such depopulation has been observed in larger Russian megalopolises such as Moscow, Saint Petersburg, and Nizhny Novgorod.[1]

Scientists from Chelyabinsk and Yekaterinburg have suggested that the Oriental cockroach should be added to the IUCN Red List of Threatened Species.[2][3]

Suggested explanations

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The depopulation of cockroaches may be exaggerated, or this phenomenon may be temporary or cyclic.[1][4] A number of explanations of the phenomenon are discussed in the media, of varying degree of credibility.

  • Usage of plastic bags to store domestic waste and the discontinuation of rubbish chute usage.[5]
  • Cockroaches may have migrated out of homes to other, more suitable places.[6][7]
  • Transitioning from antiquated roach-management methods such as egg yolk and boric acid to newer poisons and methods may have led to more effective depopulation.[8][9][10][1]
  • 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.[11][12][13] However, cockroaches were noticed to disappear even in the houses where such construction materials were not used.[14]
  • The emergence of Pharaoh ants, who compete with the cockroaches for food, and may even feed on them. The ants will feed on dead cockroaches. [15]
  • Ozone holes may also lead to abnormal chronobiology in cockroaches.[12][13]
  • Internal competitions between cockroaches may decrease the number of cockroaches.[5]

See also

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References

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  1. ^ a b c Исчезновение тараканов на Белгородчине не связано с радиацией :: ИА Бел.Ру - Новости Белгорода он-лайн (in Russian). Bel.ru. Archived from the original on 2013-10-16. Retrieved 2010-08-23.
  2. ^ "Российские экологи бьют тревогу: исчезающих из домов тараканов хотят переселить в Красную книгу". Newsru.com. 21 April 2008. Archived from the original on 2010-09-07. Retrieved 2010-08-23.
  3. ^ "Тараканы вымирают : Насекомых занесут в Красную книгу". Weekend.rbcdaily.ru. 2008-04-18. Archived from the original on 2010-02-02. Retrieved 2010-08-23.
  4. ^ Alexandr Goncearenco neksa neksa.net. "Архив за 02.06.2006 - "Независимая Молдова"". Nm.md. Archived from the original on 2010-09-09. Retrieved 2010-08-23.
  5. ^ a b "Газета Русский Курьер :: Тараканы в бегах". Ruscourier.ru. Archived from the original on 2010-06-20. Retrieved 2010-08-23.
  6. ^ "Тараканы бегут из Украины". Pk.kiev.ua. 2007-11-07. Archived from the original on 2008-03-14. Retrieved 2010-08-23.
  7. ^ "В Алматы снова вернулись тараканы". Zakon.kz. Archived from the original on 2021-10-29. Retrieved 2021-07-26.
  8. ^ "Факторы, вызвавшие исчезновение тараканов, могут привести к гибели человечества". Asfera.info. 2009-01-28. Archived from the original on 2010-06-02. Retrieved 2010-08-23.
  9. ^ "3 канал - Главная тема. Итоги". 3channel.ru. 2008-04-21. Archived from the original on 2009-02-09. Retrieved 2010-08-23.
  10. ^ "Тараканы в опасности". News.ntv.ru. Archived from the original on 2008-08-02. Retrieved 2010-08-23.
  11. ^ "Украинские ученые озабочены исчезновением тараканов » Наука и здоровье » Корреспондент". Korrespondent.net. 2009-01-29. Archived from the original on 2010-06-02. Retrieved 2010-08-23.
  12. ^ a b Большой город (in Russian). Bg.ru. Archived from the original on 2012-03-03. Retrieved 2010-08-23.
  13. ^ a b Задумайтесь: куда исчезли тараканы?. "Задумайтесь: куда исчезли тараканы?". Greenword.ru. Archived from the original on 2010-08-19. Retrieved 2010-08-23.
  14. ^ "Куда пропали тараканы?" Archived 2018-08-25 at the Wayback Machine, Komsomolskaya Pravda, February 14, 2007 (retrieved August 24, 2018)
  15. ^ Lee, Chow-Yang; Loke, Pooi-Yen (2004). "Foraging Behavior of Field Populations of the Big-Headed Ant, Pheidole megacephala (Hymenoptera: Formicidae)" (PDF). Sociobiology. 43 (2). Retrieved 2022-10-15. Results indicated throughout the study period that P. megacephala preferred the freshly-killed lobster cockroach (more than 40%)
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