Immunity and Virulence in Bird-Parasite Interactions

Sorci, Gabriele; Cornet, Stéphane

doi:10.2174/1874453201003010033

Cited by 7 publications

(2 citation statements)

References 79 publications

(80 reference statements)

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“…Increases in energy demands make individuals less able to control their infections [67]. Thus, higher intestinal parasite richness in late migrants may also be a consequence of the poorer condition of these migrants since they have to devote energies to limiting the effects of these pathogens [55], [68].…”

Section: Discussionmentioning

confidence: 99%

Increased Endoparasite Infection in Late-Arriving Individuals of a Trans-Saharan Passerine Migrant Bird

et al. 2013

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Earlier migration in males than in females is the commonest pattern in migrating passerines and is positively related to size dimorphism and dichromatism. The early arrival of males is a costly trait that may confer reproductive advantages in terms of better territories and/or mates. Given the physiological cost of migration, early migrants are those in best condition and accordingly the prevalence, load, and/or diversity of parasites is expected to increase in both sexes for late migrants. To test this hypothesis, we sampled 187 trans-Saharan migrant garden warblers Sylvia borin and 64 resident serins Serinus serinus (as a control for potential circannual patterns in parasite load) during spring migration in Spain. We assessed the prevalence of blood parasites (Haemoproteus, Plasmodium, and Leucocytozoon) and the prevalence and load of intestinal parasites (mainly coccidians and spirurids). The relationship between parasite (prevalence, load, and richness) and the timing of passage through a stopover area was tested using generalized linear models. Protandry occurs in the monomorphic garden warbler and males migrated on average 5.5 days before females. Intestinal parasite richness increased with the date of migration. The timing of migration was unrelated to the presence or load of the other parasite groups analyzed. Our results support the idea that the timing of migration is a condition-dependent trait and suggests that multiple intestinal parasite infestations could delay migration in birds. Even in monomorphic species parasites may play a role in sexual selection by delaying the arrival of the most infected individuals at breeding grounds, thereby further increasing the benefits of mating with early-arriving individuals.

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Section: Discussionmentioning

confidence: 99%

Increased Endoparasite Infection in Late-Arriving Individuals of a Trans-Saharan Passerine Migrant Bird

et al. 2013

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“…Host immunity is also dependent on feeding habits (Sorci & Cornet, 2010). In cities, for example, it is thought that higher immunity may be caused by a high abundance of food (Gregoire et al, 2002).…”

Section: Parasite Effects On Host Healthmentioning

confidence: 99%

Parasite–bird interactions in urban areas: Current evidence and emerging questions

Delgado-V

French

2012

Landscape and Urban Planning

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Hemosporidian parasites of free-living birds in the São Paulo Zoo, Brazil

et al. 2015

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Numerous studies addressed the diversity of bird Plasmodium and Haemoproteus parasites. However, a few have been carried out in continental avian hotspot regions such as Brazil, a country with markedly different biomes, including Amazon, Brazilian Savanna, Atlantic Forest, Caatinga, Pantanal, and Pampas. We present the first study on hemosporidian (Haemosporida) parasites in free-living birds from an Atlantic Forest fragment where more than 80 avian species have been reported. Within this area, the São Paulo Zoo locates, and it is the fourth largest zoo in the world and the largest in Latin America. A total of 133 free-living bird samples representing 12 species were collected in the zoo, with the overall hemosporidian prevalence of 18 % by PCR-based diagnostics. Twenty-four positive PCR signals were reported from four different bird species, including migratory ones. Columba livia, an urban species, considered nowadays a pest in big cities, showed 100 % prevalence of Haemoproteus spp., mainly Haemoproteus columbae. We discuss the epidemiological importance of new parasites introduced by migratory birds in the São Paulo Zoo area and the risk it poses to the captive species, which are natives or exotics. We also warn about the influence these parasites can have on the biodiversity and the structure of host populations by altering the competitive interaction between the free-living and the captive birds.

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Immunity and Virulence in Bird-Parasite Interactions

Cited by 7 publications

References 79 publications

Increased Endoparasite Infection in Late-Arriving Individuals of a Trans-Saharan Passerine Migrant Bird

Increased Endoparasite Infection in Late-Arriving Individuals of a Trans-Saharan Passerine Migrant Bird

Parasite–bird interactions in urban areas: Current evidence and emerging questions

Hemosporidian parasites of free-living birds in the São Paulo Zoo, Brazil

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