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Aggressiveness in mating

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These water striders have been used in experiments to understand the evolution of selfish behavior. Males who harass females drive them away, and so mating success is reduced for all males in a pool. Recent experiments show that when in the same pool, aggressive males have greater mating success than non-aggressive males. But the overall mating success of such a mixed pool is one-third of the success in a pool without aggressive males. This finding illustrates how natural selection can favor aggression even when it would seem a bad strategy -- a "tragedy of the commons." (Eldakar et al. 2009)
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Aquarius remigis

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Aquarius remigis, known as the common water strider, is a species of aquatic bug.[3][4] It was formerly known as Gerris remigis, but the subgenus Aquarius was elevated to generic rank in 1990 on the basis of phylogenetic analysis.[5][6] Aquarius remigis is found throughout North America, but is most prevalent in the mid-west of the United States.[7]

Description

Aquarius remigis grows slightly longer than .5 inches, and is dark brown to black in colour. It has a sharp rostrum that it uses to pierce the body of its prey and suck out the insides.[8]

Behaviour

They normally continue to move to avoid being eaten by predators. It has good vision, and can row quickly over the surface of the water. It uses its front legs to seize its prey.[8]

During breeding season, this species can communicate with potential mates by sending ripples over on the surface of the water.[8]

Adult females normally lay their eggs on plant stems at the water's edge.[8]

Diet

This predatory species feeds on mosquito larvae living under the surface, and dead insects on the surface, and other insects that accidentally land on the water.[8]

References

  1. ^ Andersen, Nils Møller (1990). "Phylogeny and taxonomy of water striders, genus Aquarius Schellenberg (Insecta, Hemiptera, Gerridae), with a new species from Australia". Steenstrupia. 16 (4): 37–81. Abstract
  2. ^ Say, Thomas (1859) [1832]. "Descriptions of new species of Heteropterous Hemiptera of North America". In Le Conte, John L. (ed.). The Complete Writings of Thomas Say on the Entomology of North America. Vol. 1. New York: Bailliere Brothers. p. 362.
  3. ^ "Water Strider Gerris remigis - Aquarius remigis". BugGuide.Net. Retrieved 2011-08-29.
  4. ^ Wilcox, R. Stimson (1979-12-14). "Sex Discrimination in Gerris remigis: Role of a Surface Wave Signal". Science. Sciencemag.org. 206 (4424): 1325–7. doi:10.1126/science.206.4424.1325. PMID 17799643. S2CID 24186154. Retrieved 2011-08-29.
  5. ^ Kaitala, Arja; Dingle, Hugh (1993). "Wing dimorphism, territoriality and mating frequency of the waterstrider Aquarius remigis (Say)" (PDF). Annales Zoologici Fennici. 30 (2): 163–168. Archived (PDF) from the original on 13 January 2014.
  6. ^ Gallant, Sharon L.; Fairbairn, Daphne J. (1996). "A New Species of Aquarius from the Southeastern United States, with Electrophoretic Analysis of the Clade Containing Gerris, Limnoporus, and Aquarius (Hemiptera: Gerridae)". Annals of the Entomological Society of America. 89 (5): 637–644. doi:10.1093/aesa/89.5.637. Abstract
  7. ^ Maps "Aquarius remigis" at the Encyclopedia of Life
  8. ^ a b c d e "Common Water Strider, Gerris remigis". Island Creek Elementary School. Archived from the original on 21 October 2013. Retrieved 29 August 2011.
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Aquarius remigis: Brief Summary

provided by wikipedia EN

Aquarius remigis, known as the common water strider, is a species of aquatic bug. It was formerly known as Gerris remigis, but the subgenus Aquarius was elevated to generic rank in 1990 on the basis of phylogenetic analysis. Aquarius remigis is found throughout North America, but is most prevalent in the mid-west of the United States.

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