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<p>This study investigated the parasitic fauna of the Atlantic Yellow-nosed Albatross (<i>Thalassarche chlororhynchos</i>), a marine species endemic to the South Atlantic and classified as Vulnerable by the IUCN due to its low reproductive rate and interactions with fishing activities. Between July 2024 and August 2025, seven specimens were rescued along the coast of Sergipe, Brazil, and examined through necropsy and parasitological analyses. All individuals were parasitized, totaling 526 specimens collected, comprising both ecto and endoparasites, with 100% prevalence for both groups. The overall frequency of ectoparasites in <i>Thalassarche chlororhynchos</i> was 100%, as all examined specimens harbored at least one species of ectoparasite. Five species of ectoparasites were recorded: one hard tick, <i>Ixodes percavatus</i>; four species of chewing lice, <i>Austromenopon navigans</i> (42.85%), <i>Docophoroides murphyi</i> (57.14%), <i>Harrisoniella hopkinsi</i> (14.28%), and <i>Paraclisis diomedeae</i> (85.71%); and four species of helminths, <i>Stegophorus diomedeae</i> (28.57%), <i>Seuratia shipleyi</i> (28.57%), <i>Contracaecum pelagicum</i> (57.14%), and <i>Tetrabothrius</i> sp. (prevalence not calculated). It was observed that all specimens presented multiple parasitism by ecto and endoparasites. The results include the first records of <i>A. navigans</i>, <i>S. shipleyi</i>, <i>C. pelagicum</i>, and <i>Tetrabothrius</i> sp. in <i>T. chlororhynchos</i>, as well as the first occurrences of the lice <i>D. murphyi</i> and <i>P. diomedeae</i> in this albatross species within Brazilian territory. These findings reinforce the still underestimated diversity of parasitic fauna associated with albatrosses and highlight the need for further surveys to better understand parasite–host interactions in oceanic birds of the South Atlantic.</p>

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Parasitofauna of Atlantic Yellow-Nosed Albatross, Thalassarche chlororhynchos (Procellariiformes: Diomedeidae), stranded on the northeastern coast of Brazil

  • 期刊论文

  • 发表日期：

    2026年3月16日

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  • André Mota Alves,
  • Larissa Mello Figueiredo,
  • Rayanne Beatriz de França Oliveira,
  • Órion Pedro da Silva,
  • Sarah Raquel Jesus Santos Simões,
  • Tamiris dos Santos Rodrigues,
  • Marina Maria Verissimo de Oliveira,
  • Emanuelle Ferreira dos Santos,
  • Bruna Gomes de Oliveira,
  • Iara Gama de Medeiros,
  • Elaine Knupp de Brito,
  • Claudia Carvalho do Nascimento,
  • Victor Fernando Santana Lima,
  • João Carlos Gomes Borges

摘要

This study investigated the parasitic fauna of the Atlantic Yellow-nosed Albatross (Thalassarche chlororhynchos), a marine species endemic to the South Atlantic and classified as Vulnerable by the IUCN due to its low reproductive rate and interactions with fishing activities. Between July 2024 and August 2025, seven specimens were rescued along the coast of Sergipe, Brazil, and examined through necropsy and parasitological analyses. All individuals were parasitized, totaling 526 specimens collected, comprising both ecto and endoparasites, with 100% prevalence for both groups. The overall frequency of ectoparasites in Thalassarche chlororhynchos was 100%, as all examined specimens harbored at least one species of ectoparasite. Five species of ectoparasites were recorded: one hard tick, Ixodes percavatus; four species of chewing lice, Austromenopon navigans (42.85%), Docophoroides murphyi (57.14%), Harrisoniella hopkinsi (14.28%), and Paraclisis diomedeae (85.71%); and four species of helminths, Stegophorus diomedeae (28.57%), Seuratia shipleyi (28.57%), Contracaecum pelagicum (57.14%), and Tetrabothrius sp. (prevalence not calculated). It was observed that all specimens presented multiple parasitism by ecto and endoparasites. The results include the first records of A. navigans, S. shipleyi, C. pelagicum, and Tetrabothrius sp. in T. chlororhynchos, as well as the first occurrences of the lice D. murphyi and P. diomedeae in this albatross species within Brazilian territory. These findings reinforce the still underestimated diversity of parasitic fauna associated with albatrosses and highlight the need for further surveys to better understand parasite–host interactions in oceanic birds of the South Atlantic.