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<p>Spanish Sparrows in the Western Palaearctic show different migration strategies that might affect haemosporidian parasitism. In a migratory Croatian population, haemosporidian prevalence averaged at 39.8%, with low parasitemia and low parasite diversity dominated by two <i>Haemoproteus</i> and one <i>Plasmodium</i> lineage. Comparative data from six host populations revealed higher net infection prevalence in resident (60%) compared to migratory populations (40%), wherein the strategy dependency was caused by the genus <i>Plasmodium</i>. Genus-specific prevalence of <i>Haemoproteus</i> or <i>Leucocytozoon</i> did not vary coherently with migration strategies. In total, 32 haplotypes have been recorded so far (16 <i>Plasmodium</i>, seven <i>Haemoproteus,</i> and nine <i>Leucocytozoon</i> lineages). Chronic infections were dominated by three lineages (h-PADOM05 in 34.1%, h-PADOM23 in 17.4%, and p-SGS1 in 12.6% of records), while 19 lineages were detected only once (78% of <i>Leucocytozoon</i>, 69% of <i>Plasmodium</i> and 14% of <i>Haemoproteus</i> lineages). Genetic parasite diversity did not show a consistent pattern with migration strategy, but haplotype diversity was high at local scales, i.e. in resident sparrows of Sardinia and migratory hosts in Bulgaria. Chao´s dissimilarity indices of 0.79–0.93 for resident and 0.72–0.91 for migratory populations pointed to a high degree of site-specificity in parasite compositions. Thus, migration can influence haemosporidian prevalence in Spanish Sparrows, but parasite diversity or lineage composition appears to be determined by conditions at population-specific sites of residency.</p>

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Haemosporidian parasite infections in Spanish Sparrows Passer hispaniolensis hispaniolensis of the Western Palaearctic

  • 期刊论文

  • 发表日期：

    2026年2月11日

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  • Steffen Hahn,
  • Raffaella Schmid,
  • Davor Ćiković,
  • Sanja Barišić,
  • Tamara Emmenegger

摘要

Spanish Sparrows in the Western Palaearctic show different migration strategies that might affect haemosporidian parasitism. In a migratory Croatian population, haemosporidian prevalence averaged at 39.8%, with low parasitemia and low parasite diversity dominated by two Haemoproteus and one Plasmodium lineage. Comparative data from six host populations revealed higher net infection prevalence in resident (60%) compared to migratory populations (40%), wherein the strategy dependency was caused by the genus Plasmodium. Genus-specific prevalence of Haemoproteus or Leucocytozoon did not vary coherently with migration strategies. In total, 32 haplotypes have been recorded so far (16 Plasmodium, seven Haemoproteus, and nine Leucocytozoon lineages). Chronic infections were dominated by three lineages (h-PADOM05 in 34.1%, h-PADOM23 in 17.4%, and p-SGS1 in 12.6% of records), while 19 lineages were detected only once (78% of Leucocytozoon, 69% of Plasmodium and 14% of Haemoproteus lineages). Genetic parasite diversity did not show a consistent pattern with migration strategy, but haplotype diversity was high at local scales, i.e. in resident sparrows of Sardinia and migratory hosts in Bulgaria. Chao´s dissimilarity indices of 0.79–0.93 for resident and 0.72–0.91 for migratory populations pointed to a high degree of site-specificity in parasite compositions. Thus, migration can influence haemosporidian prevalence in Spanish Sparrows, but parasite diversity or lineage composition appears to be determined by conditions at population-specific sites of residency.