1 Introduction to the Ecology, Epidemiology, and Evolution of Parasitism in Daphnia. This chapter provides a short introduction to the topic of the book. I define. 7 Host Range of Daphnia Parasites. In this chapter, I summarize what we know about parasite host ranges and host specificity. I outline the ecological. 5 The Effects of Daphnia Parasites on Host Fitness. Parasites use their hosts to foster their own needs, thus interfering with the hosts’ survival and reproduction.
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Morbidity and mortality of a host that is caused by parasites and pathogens.
Note that this question is different from the question about parasite local adaptation Local adaptation: Development of an organism from an unfertilized egg.
For the other parasites, no clear statement could be made. Chapter 9 introduces the important question of whether parasites regulate their host populations or even drive them to extinction. Please send me an email: An extreme example of altered predator exposure would be a case in which the parasite manipulates its host’s behavior to facilitate it own transmission Transmission: Thus, a conservative approach would classify P.
Effects of ecology, life history, and behavior, pp.
On the other hand, P. Animal component of small aquatic organisms that mainly drift with water movements. Thus, specificity may range from extreme forms, such as the ability of a parasite to infect only certain members of one host species, to slight differences in the degree to which the parasite infects or harms different host species. They mostly inhabit fresh water. Clonal selection is found when clones differ in their lifetime reproductive success and is usually seen in the form of genotype frequency changes.
Chapter 7 is on host ranges and discusses what we know about the specificity of Rcology parasites.
Ecology, epidemiology, and evolution of parasitism in Daphnia by Dieter Ebert
It is important to note that although this pattern is found when averaging across several host—parasite combinations, occasionally a host in a novel combination is much more affected by the new parasites than expected Ebert b Ebert D Virulence and local adaptation of a horizontally transmitted parasite.
An animal that kills its victim, the prey item, and then feeds on it to subsist until the next kill.
I devote an entire chapter to discussing the dapbnia Fitness: Potential for coevolution and frequency-dependent selection.
Besides fecundity and survival, parasites Parasite: The second part will deal with the taxonomy and natural history of all parasites known to Daphnia. By the time infected animals were collected, the ages of their infections were also different. At a lower temperature, the parasite gained later control over host fecundity. Chemical cues released from predators evooution recognized by the prey.
There is, moreover, so much information about parasitism in the Cladocera that I have decided to split the work into two parts and publish it as two independent books. AndersonAnderson RM Parasite pathogenicity and the depression of host population equilibria.
Ecology, Epidemiology, and Evolution of Parasitism in Daphnia
Organism that lives attached to the body surface of another organism. They concluded that this is because the host’s adaptive response against fish predators changes life history traits expressed early during the host’s life, whereas the parasite affects its host during later stages. The interaction between parasitic infections and the feeding conditions for the host has not yet been generally determined.
I will maintain a Web site on my home institution’s server to report updates and correct dqphnia. Organism exhibiting an obligatory, detrimental dependence on another organism its host. Because field studies usually cannot exclude the possibility that parasites infect hosts already weakened by other factors, such as poor anv, injuries, and inbreeding, their results must be considered with caution.
Ecology, Epidemiology, and Evolution of Parasitism in Daphnia – NCBI Bookshelf
It has been speculated that this specific pathology is adaptive for P. Furthermore, with field-caught animals, one cannot quantitatively determine the strength of the effects.
Interestingly, the well-fed infected hosts also produced more P.
Occasional reports of “nonsignificant” effects of parasites have to be considered in the light of low statistical power or large environmental noise. Altered rank orders of host genotypes may have profound consequences for the evolution Evolution: Survival and fecundity of Daphnia depend strongly on the abiotic and biotic environment e.