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Distance covered by uninfected and infected hosts.
Cumulative distance (mm) covered by uninfected and P. minutus infected G. roeseli after contact with non-host predator D. villosus (redrawn from Table 1, p<0.001, Medoc 2008).

Discussion questions

  1. How can a parasite both increase the possibility of being eaten by a definitive host and decrease the possibility of being consumed by a non-host predator?
  2. Why is behavior modification so important for many parasites?

Glossary

  • Cystacanth - developed acanthocephalan larva, which is able to infect its definitive host (Moore 1983).
  • Co-evolution - phenomenon when a change in one species causes a change in another species, which triggers a counter-adaptation in the first species again, so that the two species evolve together.
  • Definitive host - an organism in which parasite reproduces and resides until death.
  • Extended phenotype - term coined by Richard Dawkins to describe the phenomenon of genes not only determining physical phenotypes but also various behaviors of an organism.
  • Free-living stage - a stage in parasite’s life when following a signal from the environment or the host’s body the parasite escapes the host’s body and lives outside (Sukhdeo 1995).
  • Intermediate host - an organism that contains the parasite for a limited amount of time, when the parasite life cycle requires more than one host.
  • Invasive host - a potential host for a parasite that is not native to the area, often harder to invade than local hosts
  • Neuromodulators - can alter the neural circuits and allow the organism to be flexible in its responses to the environment (Adamo 2002).
  • Oddity selection - when conspicuous appearance of an organism causes it to becomes more vulnerable to predation.
  • Serotonin - a neurotrasmitter and hormone, also known as 5-HT, that is known to constrict blood vessels and have an effect on mood (Medicinenet.com)
  • Parasitism - a relationship between two species in which one benefits and another suffers losses to fitness.

References

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  • Bakker T., Mazzi D., Zala S. 1997. Parasite-induced changes in behavior and color make Gammarus pulex more prone to fish predation. Ecology. 78:1098-1104.
  • Baldauf S., Thunken T., Frommen J., Bakker T., Heupel O., Kullmann H., 2007. Infection with an acanthocephalan manipulates an amphipod’s reaction to a fish predator’s odours. International Journal of Parasitology. 37:61-65.
  • Bauer A., Trouve S., Gregoire A., Bollanche L., Cezilly F. 2000. Differential influence of Pomphorhynchus laevis (Acanthocephala) on the behavior of native and invader gammarid species. International Journal and Parasitology. 30:1453-1457.
  • Benesh, D., Duclos L., and Nickol B. 2005. The behavioral response of amphipods harboring Corynosoma constrictum (acanthocephala) to various components of light. American Society of Parasitologists. 91: 731-36.
  • Benesh D., Kitchen J., Pulkkinen K., Hakala I., Valtonen E. 2008. The effect of Echinorhyncus borealis (Acanthocephala) infection on the anti-predator behavior of a benthic amphipod. American Society of Parasitologists. 94:542-545.
  • Benesh D., Valtonen E. 2007. Effects of Acanthocepalus lucii (Acanthocephala) on intermediate host survival and growth: implications for exploitation strategies. J. Parasitol. 93:735-741.
  • Benesh D., Valtonen E. 2007. Proximate factors affecting the larval life history of Acanthocepalus lucii (Acanthocephala). J. Parasitol. 93:742-749.
  • Benesh D., Valtonen E., Seppala O. 2008. Multidimensionality and intra-individual variation in host manipulation by an acanthocephalan. Parasitology. 135:617-626.
  • Bentley C., Hurd H. 1995. Depressed protein and copper content of the midgut gland in an intermediate host, Gammarus pulex (Crustacea), infected with cystacanths of Pomphorhynchus laevis (Acanthocephala). Journal of Invertebrate Pathology. 66:1-5.
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  • Brattey J. 1988. Life History and Population Biology of Adult Acanthocephalus lucii (Acanthocephala: Echinorhynchidae). Journal of Parasitology. 74:72-80.
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  • Easmon C. 2005. “Rabies.” Netdoctor.co.uk. Nov. 16, 2008. (External Link) .
  • Franceschi N., Bauer A., Bollanche L., Rigaud T. 2008. The effects of parasite age and intensity on variability in acanthocephalan-induced behavioral manipulation. International Journal of Parasitology. 38:1161-1170.
  • Gottrop M. 2005. “Corynosoma drawing.” Wikipedia Commons. (External Link)
  • Haine E., Boucansaud K., Rigaud T. 2005. Conflict between parasites with different transmission strategies infecting an amphipod host. Proceedings of the Royal Society B. 272:2505-2510.
  • Hasu T. 2007. Isopod ( Asellus aquaticus) size and acanthocephalan (Acanthocephalus lucii) infection. J. Parasitol. 93:450-457.
  • Helluy S., Holmes J. 1990. Serotonin, octopamine, and the clinging behavior induced by the parasite Polymorphus paradoxus (Acanthocephala) in Gammarus lacustris (Crustacea). Can. J. Zool. 68:1214-1220.
  • Kaldonski N., Perrot-Minnot M.-J., Cezilly F. 2007. Differential influence of two acanthocephalan parasites on the antipredator behavior of their common intermediate host. Animal Behavior. 74: 1311-1317.
  • Kaldonski N., Perrot-Minnot M.-J., Motreuil S., Cezilly F. 2008. Infection with acanthocephalans increases the vulnerability of Gammarus pulex (Crustacea, Amphipoda) to non-host invertebrate predators. Parasitology. 135:627-631.
  • Kennedy C. 2006. Ecology of the Acanthocephala. New York, NY: Cambridge University Press.
  • Medoc V., Bollanche L., Beisel J.-N. 2006. Host manipulation of a freshwater crustacean ( Gammarus roeseli) by an acanthocephalan parasite ( Polymorphus minutus) in a biological invasion context. International Journal of Parasitology. 36:1351-1358.
  • Medoc V., Biesel J.-N. 2008. An acanthocephalan parasite boosts the escape performance of its intermediate host facing non-host predators. International Journal of Parasitology. 977-983.
  • Moore J. 1983. Responses to an avian predator and its isopod prey to an acanthocephalan parasite. Ecology. 64:1000-1015.
  • Moret Y., Bollanche L., Wattier R., Rigaud T. 2007. Is the host or the parasite the most locally adapted in an amphipod-acanthocephalan relationship? A case study in a biological invasion context. International Journal of Parasitology. 37:637-644.
  • Perrot-Minnot M.-J. 2004. Larval morphology, genetic divergence, and contrasting levels of host manipulation between forms of Pomphorhynchus laevis (Acanthocephala). International Journal for Parasitology. 34:45-54.
  • Piscart C., Webb D., Beisel J. 2007. An acanthocephalan parasite increases the salinity tolerance of the freshwater amphipod Gammarus roeseli (Crustacea: Gammaridae). Naturwissenschaften. 94:741-747.
  • Plaistow S., Troussaud J.-P., Cezilly F. 2001. The effect of the acanthocephalan parasite Pomphorhynchus laevis on the lipid and glycogen content of its intermediate host Gammarus pulex. International Journal of Parasitology.31:346-351.
  • Raschka A. 2007. “Acanthocephala Pomphorhynchus.” Wikipedia Commons. (External Link)
  • Rigaud T., Moret Y. 2003. Differential phenoloxidase activity between native and invasive gammarids infected by local acanthocephalans: different immunosuppression? Parasitology. 127:571-577.
  • Sukhdeo M., Chappell L. 1995. Parasitology and Behavior. New York, NY: Cambridge University Press.
  • Tain L., Perrot-Minnot M.-J., Cezilly F. 2006. Altered behavior and brain serotonergic activity caused by acanthocephalans: evidence for specificity. Proceeding of the Royal Society B-Biological Sciences. 273:3039-3045.
  • Tain L., Perrot-Minnot M.-J., Cezilly F. 2007. Differential influence of Pomphorhynchus laevis (Acanthocephala) on brain serotonergic activity in two congeneric host species. Biology Letters. 3:68-71.

About the author

picture of the author.
Dina Yangirova

I was born in Russia, but have lived in Houston, Texas for nine years. I am a junior biochemistry major and I have taken the Animal Behavior class because I dearly love all animals, even the ugly ones. In my spare time, I like to dance, take pictures, draw, watch movies, and read. The hardest part of writing this chapter was putting together all the disparate, disjoined pieces of information and constructing a coherent picture of how the acanthocephalans operate. In the process, I have realized yet again that even the smallest and slimiest creatures can be incredibly complex and exciting.

Questions & Answers

why should a firm close down when it's unable to pay it's variable cost?
ANDREW Reply
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exchange of goods and services between countries is call
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Constant opportunity cost means the value of sacrifice remains constant in every step.
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Gross Domestic Product GDP
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gross daily performance
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they should pay tax as progressive system and should make sacrifice for taxation of their income and land etc
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total concentration on to reduce the per unit cost of commodity by technically or whatever
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Demand is the various quantities of goods and services that consumer(s)are willing and able to purchase at a price within a time
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What is demand
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demand relates with the need of people for their satisfaction.
Mohd
Distinguish between cross elasticity and income elasticity of demand
Ruth Reply
Distinguish between cross elasticity and income elasticity of demand
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if change in the demand of the commodity with respect to change in demand of the substitute or other product called cross elasticity
Hamza
and. if change in the demand of the commodity due to change in the income . called income elasticity
Hamza
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Vipul
Cross elasticity of demand is the degree of responsiveness of quantity demanded of a commodity to a small change in price of another commodity whiles Income elasticity of demand is the degree of responsiveness of quantity demanded of a commodity to a small change in income of it's consumers
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but these are book wordings
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income elasticity of demand shows how quantity demanded changes due to changes in income on the other hand cross elasticity refers to how the quantity demanded of a particular good alers given a change in the price of another good.
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Income
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economic growth of Bhutan
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The answer is: little more than high school algebra and graphs.
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Source:  OpenStax, Mockingbird tales: readings in animal behavior. OpenStax CNX. Jan 12, 2011 Download for free at http://cnx.org/content/col11211/1.5
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